Base isolated nebulizing device and methods

Information

  • Patent Grant
  • 6978941
  • Patent Number
    6,978,941
  • Date Filed
    Friday, April 9, 2004
    20 years ago
  • Date Issued
    Tuesday, December 27, 2005
    18 years ago
Abstract
An aerosol generator comprises a vibratable member having a front, a rear, an outer periphery and a plurality of apertures extending between the front and the rear. A support element is disposed about the outer periphery of the vibratable member, and a vibratable element is coupled to the support element. The vibratable element is configured to vibrate the vibratable member at ultrasonic frequencies. An isolating structure is coupled to the support element and is configured to couple the aerosol generator to a support structure. The isolating structure has a mechanical vibrational impedance that is sufficient to substantially vibrationally isolate the aerosol generator from the support structure.
Description
BACKGROUND OF THE INVENTION

This invention is related generally to the field of aerosolization of liquids, and in particular to the aerosolization of liquids using an aerosol generator that operates at ultrasonic vibrational frequencies. More specifically, the invention relates to techniques for vibrationally isolating an aerosol generator that is connected to another structure, such as the housing of an aerosolization device, when aerosolizing a liquid.


Aerosolization of liquids is an important aspect of many businesses. For example, liquids are commonly aerosolized in connection with drug delivery, air humidification, deodorant or insecticide delivery, and the like. One exemplary way to aerosolize liquids is by supplying liquid to a vibratable member having a plurality of apertures and vibrating the vibratable member at ultrasonic frequencies. One way to vibrate the vibratable member is by use of a piezoelectric transducer. Such techniques are described in, for example, U.S. Pat. Nos. 5,164,740; 5,938,117; 5,586,550; 5,758,637 and 6,085,740, the complete disclosures of which are herein incorporated by reference.


When vibrating such vibratable members at ultrasonic frequencies, there is a need to ensure that a maximum amount of the vibrational energy is transferred from the piezoelectric transducer to the vibratable member, rather than to some surrounding structure. Otherwise, performance losses or performance variations may occur because of the forces that are transmitted through the material which couples the aerosol generator to surrounding structures, such as the housing of an aerosolization device.


Hence, this invention is related to ways to maximize the amount of vibrational energy transferred to the vibratable member, thereby maximizing the efficiency of the aerosol generator. In this way, the repeatability and performance of the aerosol generator are enhanced, irrespective of the devices into which the aerosol generators are integrated.


SUMMARY OF THE INVENTION

The invention provides for the vibrational isolation of an aerosol generator from surrounding structures. In one embodiment, this is accomplished by the design of an aerosol generator that comprises a vibratable member having a front, a rear, an outer periphery and a plurality of apertures extending between the front and the rear. A support element is disposed about the outer periphery of the vibratable member. A vibratable element is coupled to the support element and is configured to vibrate the vibratable member at ultrasonic frequencies. An isolating structure is coupled to the support element and is configured to couple the aerosol generator to a support structure, such as the housing of an aerosolization device. The isolating structure has a vibrational mechanical impedance that is sufficient to substantially vibrationally isolate the aerosol generator from the support structure. In this way, the aerosol generator may be operated at increased efficiencies and in a repeatable manner when coupled to surrounding structures.


Conveniently, the isolating structure and the support element may be integrated into a single component, thereby facilitating its manufacture. In one aspect, the isolating structure may comprise a plurality of arms that extend from the support element. These arms may have a wide variety of shapes and contours. For example, the arms may be bent, crimped, curved, or the like to facilitate vibrational isolation.


In another aspect, the isolating structure may comprise one or more elastomeric or plastic members. For example, the isolating structure may be constructed of an elastomeric or plastic washer. Conveniently, the washer may be coupled to the support element by forming tabs in the support element and inserting the washer between the tabs. As another example, the isolating structure may be constructed of a plurality of discrete elastomeric members or bellows that extend from the support element.


To facilitate vibrational isolation, the isolating structure may be configured so that it has a resonant frequency that is outside the operating range of the aerosol generator. Such an operating range for the aerosol generator may be about 50 kHz to about 250 kHz.


In a further aspect, the vibratable member may be dome shaped and include tapered apertures. Examples of such vibratable members are described in U.S. Pat. Nos. 5,586,550, 5,758,637 and 6,085,740, previously incorporated by reference.


The invention further provides an exemplary method for aerosolizing liquids. Such a method utilizes an aerosol generator having a vibratable member with apertures and a vibratable element to vibrate the vibratable member. According to the method, liquid is supplied to the vibratable member and the vibratable element is used to vibrate the vibratable member at an ultrasonic frequency to eject liquid droplets through the apertures. During vibration, an isolating structure is used to substantially vibrationally isolate the aerosol generator to enhance the operating performance of the aerosol generator. Further, the vibratable member may be vibrated at a frequency that is different from a fundamental frequency of the isolating structure to enhance the efficiency of the aerosol generator. As previously mentioned, a variety of isolating structures may be used to vibrationally isolate the aerosol generator from any surrounding structures. Such isolating structures also have resonant frequencies outside of the operating range of the aerosol generator.


In a further embodiment, the invention provides a method for forming an aerosol generator. According to the method, an isolating structure is stamped or coined out of a sheet of material. A vibratable member having a plurality of apertures is coupled to the isolating structure, and a vibratable element, such as a piezoelectric transducer, is coupled to the isolating structure or the vibratable member. The vibratable element is used to vibrate the vibratable member at ultrasonic frequencies while the isolating structure is used to vibrationally isolate the aerosol generator from surrounding structures. By forming the isolating structure in this way, the cost of producing the aerosol generator may be greatly reduced and the aerosol generator may be produced in higher volumes.


In one aspect, the isolating structure comprises an annular member and a plurality of arms extending from the annular member. In another aspect, the arms are bent or crimped after the isolating structure has been stamped. In a further aspect, the vibratable member is coupled across a central opening of the annular member, and the vibratable element comprises an annular piezoelectric element that is coupled to the annular member.


Another method for forming an aerosol generator uses a support element having an outer periphery. A plurality of tabs are formed in the outer periphery of the support element. This may be accomplished by making a pair of cuts in the support element and then bending the material between the cuts away from the support element. A vibratable member having a plurality of apertures is coupled to the support element, and a vibratable element is coupled to the support element or the vibratable member and is vibratable at ultrasonic frequencies. A gasket is coupled about the support element, with the gasket being received into the tabs. The gasket has a mechanical vibrational impedance that is sufficient to substantially vibrationally isolate the aerosol generator. Such a process is useful in producing an isolated aerosol generator in a time and cost efficient manner.





BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a rear perspective view of one embodiment of an aerosol generator according to the invention.



FIG. 2 is a rear perspective view of an isolating structure of the aerosol generator of FIG. 1 prior to assembly of the aerosol generator.



FIG. 3 illustrates an aerosolization device having the aerosol generator of FIG. 1.



FIG. 4 is a front perspective view of another embodiment of an aerosol generator according to the invention.



FIG. 5 is a side perspective view of a further embodiment of an aerosol generator according to the invention.



FIG. 6 is a rear perspective view of yet another embodiment of an aerosol generator according to the invention.



FIG. 7 is a rear perspective view of still another embodiment of an aerosol generator according to the invention.



FIG. 8 is a rear perspective view of one particular embodiment of an aerosol generator according to the invention.



FIG. 9 is cross sectional view of another embodiment of an aerosol generator according to the invention.



FIG. 10 is a perspective view of a support element and an isolating structure of the aerosol generator of FIG. 9.



FIG. 11 is a perspective view of the support element of FIG. 10 prior to the formation of tabs that are employed to hold the isolating structure.





DESCRIPTION OF THE SPECIFIC EMBODIMENTS

The invention provides techniques and devices to vibrationally isolate an aerosol generator from surrounding structures to which the aerosol generator is coupled. In some cases, the surrounding structures will be the housing of an aerosolizer or nebulizer, or various structures within such devices. Such aerosolization or nebulization devices can have complex geometry's as well as complicated fluid delivery and packaging requirements that can affect the operation of the aerosol generator.


The aerosol generators of the invention may comprise a vibratable member having a plurality of apertures, such as an aperture plate, through which liquid droplets are ejected and a piezo electric transducer to vibrate the aperture plate. The transducer is configured to vibrate the aperture plate at ultrasonic frequencies, typically within the range from about 50 kHz to about 250 kHz. Non-limiting examples aerosol generators utilizing such components are described in U.S. Pat. Nos. 5,164,740; 5,938,117; 5,586,550; 5,758,637 and 6,085,740, incorporated herein by reference.


The aerosol generators of the invention utilize an isolation system that is designed to accommodate nearly all types of external interfaces to enhance the repeatability and performance of the aerosol generator. In this way, the aerosol generators may be placed into a wide variety of complex aerosolization or nebulization devices without significantly compromising their operation. The isolation systems have a mechanical vibrational impedance that prevents the force transmitted at the edge of the aerosol generator from reaching the surrounding structure. Such a phenomenon may be characterized as the transmissibility and is defined as the ratio of the force experienced by the surrounding structure to the force produced at the edge of the aerosol generator. According to the invention, the transmissibility is less than about 30%, more preferably less than about 20%, and most preferably less than about 10%. In some cases the transmissibility has been measured to be less than about 6% and at about 2% to 3% at resonance.


The isolation system may be constructed of either discrete or continuous elements and may have a wide variety of shapes and sizes. For example, the isolation system may be constructed of thin metals arms, elastomer bushings, plastic legs, elastomer edges, and the like. Types of materials that may be used to construct such elements include silicone, urethane, elastomers, thin or curved metals, and the like.


The isolating systems of the invention are also configured to have a resonant frequency that is outside of the operating frequency of the aerosol generator. In this way, the isolating structure does not resonate during operation of the aerosol generator, thereby enhancing the performance and repeatability of the aerosol generator.


Another feature of the invention is that the isolating systems may be incorporated into the aerosol generators in such a way that the aerosol generators may be fabricated in high volumes and at reasonable costs. This may be accomplished, for example, by utilizing an isolating structure to both vibrationally isolate the aerosol generator and to support the aperture plate. Such isolating structures may conveniently be formed by stamping, coining, molding, and the like.


Referring now to FIG. 1, one embodiment of an aerosol generator 10 having an isolating system will be described. Aerosol generator 10 comprises a vibratable member 12 having a front (hidden from view), a rear 14 and an outer periphery 16. Although not shown, vibratable member has a plurality of apertures that taper from rear 14 to the front. Examples of vibratable members that may be used with the invention are described generally in U.S. Pat. Nos. 5,164,740; 5,938,117; 5,586,550; 5,758,637 and 6,085,740, incorporated by reference. As shown, vibratable member 12 is dome shaped in geometry. However, it will be appreciated that other shapes and sizes of vibratable members may be used, and the invention is not intended to be limited to a specific type of vibratable member.


Vibratable member 12 is coupled to an isolating structure 18 that also functions as a support member to support vibratable member 12. Isolating structure comprises an annular body 20 and a set of arms 22 that are used to couple aerosol generator 10 to another structure, such as the housing of an aerosolization device. Annular body 20 is secured about outer periphery 16 of vibratable member 12 so that the center of vibratable member is free to eject liquid droplets. Coupled to annular body 20 is an annular piezo electric element 24 that is used to vibrate vibratable member 12 when current is supplied to piezo electric element 24.


In use, arms 22 are employed to prevent the transmission of forces at the outer edge of body 20 from reaching surrounding structures so that aerosol generator 10 is substantially vibrationally isolated from any surrounded structures to which arms 22 may be coupled. In this example, arms 22 may be constructed of aluminum, steel, elastomers, plastic and the like and may have one or more bends to facilitate mounting of aerosol generator 10 to another structure and to prevent force transmission. Further, although shown with three arms, aerosol generator 10 may be constructed to have different numbers of arms, such a two, four, five, or the like. With such a construction, aerosol generator 10 may be operated in a repeatable manner, i.e., the aerosol generator is able to consistently produce droplets within a given size range and within a given range of flow rates. Further, this embodiment has shown to have a transmissibility at about 2% at resonance.


As shown in FIG. 2, isolating structure 18 may be stamped from a sheet of material. Once stamped, vibratable member 14 and piezo electric element 24 may be bonded to body 22. Arms 22 may also be bent to the desired shape. Such a process lends itself to high volume production at reasonable costs.


Referring now to FIG. 3, aerosol generator 10 is shown coupled to an aerosolization device 30. Device 30 comprises a housing 32 to hold the various components of aerosolization device 30. Housing 32 further includes a mouthpiece 34 and one or more vents (not shown) to permit air to enter into housing 32 when a user inhales from mouthpiece 34. Disposed within housing 32 is aerosol generator 10 of FIG. 1. However, it will be appreciated that any of the aerosol generators described herein may be placed into housing 32. Aerosol generator 10 is coupled to housing 32 by arms 22 that also serve as an isolating structure to vibrationally isolate aerosol generator 10 from housing 32 in a manner similar to that described herein.


Aerosolization device 30 further includes a canister 36 having a supply of liquid that is to be aerosolized by aerosol generator 10. Canister 36 may include a metering valve to place a metered amount of liquid onto aperture plate 16. Although not shown, a button or the like may be employed to dispense the volume of liquid when requested by the user.


Housing 32 includes an electronics region 38 for holding the various electrical components of aerosolization device 30. For example, region 38 may include a printed circuit board 40 which serves as a controller to control operation of the aerosol generator 10. More specifically, circuit board 40 may send (via circuitry not shown) an electrical signal to the piezoelectric element 24 to cause aperture plate 16 to be vibrated. A power supply P, such as one or more batteries, is electrically coupled to circuit board 40 to provide aerosolization device 30 with power.



FIG. 4 illustrates an alternative embodiment of an aerosol generator 70. Aerosol generator 70 comprises a vibratable member 72 having a front 74, a rear (not shown) and a plurality of apertures. Vibratable member 72 is coupled to a support member 76 that also supports a piezo electric element 78. Extending from support member 76 are a set of curved arms 80 that function as an isolating structure to vibrationally isolate aerosol generator from other structures to which arms 80 are coupled. Arms 80 may be constructed materials similar to those described in connection with FIG. 1. Further, although shown with only one curve, in some cases each arm may include multiple curves or bends to facilitate vibrational isolation of aerosol generator 70.



FIG. 5 illustrates another embodiment of an aerosol generator 82 having an alternative isolation system. Aerosol generator 82 is similar to aerosol generator 70 except for the configuration of the arms. For convenience of discussion, similar elements will be referred to with the same reference numerals used in FIG. 4. Aerosol generator 82 utilizes a set of angled arms 84 that are connected to support member 76. Although shown with one angled bend, arms 84 may alternatively have multiple angled bends, that may or may not have the same angle of bend.



FIGS. 6–8 illustrate further alternative embodiments of aerosol generators having different isolation systems. These aerosol generators are similar to aerosol generator 70 except for the isolating structure. For convenience of discussion, similar elements will be referred to with the same reference numerals used in FIG. 4. FIG. 6 illustrates an aerosol generator 88 having a set of tabs 90 that are connected to support member 76 and are used to vibrationally isolate aerosol generator 88 from surrounding structures to which tabs 90 are connected. Tabs 90 may be constructed of materials such as those described with previous embodiments, and may be more or less in number than shown in the drawing. Tabs 90 may optionally include mounting holes 92 to facilitate mounting of the tabs to another structure. In some cases, tabs 90 and support structure 76 may be formed together in an insert molding process as described generally in copending U.S. patent application Ser. No. 09/848,111, filed on the same date as the present application, incorporated herein by reference.



FIG. 7 illustrates an aerosol generator 94 having an elastomeric ring 96 that is coupled about the outer periphery of support member 76. Elastomeric ring 96 serves as an isolating structure to vibrationally isolate aerosol generator 94 from surrounding structures to which ring 96 may be coupled. Alternatively, a plastic material may be used to form ring 96.



FIG. 8 illustrates an aerosol generator 98 having a set of discrete elastomeric elements 100 that are disposed about the outer periphery of support member 76. These elements may be constructed of elastomeric or plastic materials similar to those described in FIG. 7 and may be more or less in number than three. Elements 100 are employed to vibrationally isolate aerosol generator 98 from surrounding structures to which elements 100 are connected.


Shown in FIG. 9 is a cross sectional view of an aerosol generator 110 having an isolation system and which may be manufactured in a time and cost efficient manner. Aerosol generator 110 is constructed of a support element 112 that is used to hold a vibratable member 114 having a plurality of apertures in a manner similar to that described with other embodiments. As also shown in FIG. 10, support element 112 has a central aperture 116 across which vibratable member 114 is positioned and a circular outer periphery 118. Coupled to support element 112 is a vibratable element 120 to vibrate vibratable member 114 when aerosolizing a liquid.


Support element 112 may be manufactured by stamping support element 112 from a sheet as material such that is it in the shape of a disc or washer. As shown in FIG. 11, pair of cuts 122 and 124 are formed in support element 112 at the outer periphery 118 to form a set of tabs 126. Tabs 126 are then pressed or bent away from support element 112 to form a slot between tabs 126 and support element 112 as shown in FIG. 9. An isolating member 128 may then be inserted about outer periphery 118 by inserting isolating member 128 between tabs 126. Conveniently, isolating member 128 may comprise a resilient gasket that may be slipped between tabs 126. As with other embodiments, isolating member 128 may be used to vibrationally isolate the aerosol generator from surrounding structures.


The invention has now been described in detail for purposes of clarity of understanding. However, it will be appreciated that certain changes an modifications may be practiced within the scope of the appended claims.

Claims
  • 1. An aerosol generator system comprising: an aerosol generator comprising a vibratable member having a front, a rear and a plurality of apertures extending between the front and the rear, wherein the aerosol generator is configured to produce liquid droplets when operated at a certain vibrational frequency;an isolating structure operably coupled to the aerosol generator and that is configured to couple the aerosol generator to a support structure, wherein the isolating structure has a vibrational impedance that is sufficient to substantially vibrationally isolate the aerosol generator from the support structure, and
  • 2. An aerosol generator system as in claim 1, wherein the plurality of arms extended from a support element disposed about an outer periphery of the vibratable member; and a vibratable element coupled to the support element, the vibratable element being configured to vibrate the vibratable member at ultrasonic frequencies, and wherein the isolating structure and the support element are integrally formed together.
  • 3. An aerosol generator system as in claim 2, wherein the isolating structure is configured such that the ratio of forces transmitted to the support structure to forces at an outer edge of the support element is less than about 30%.
  • 4. An aerosol generator system as in claim 3, wherein the ratio is less than about 20%.
  • 5. An aerosol generator system as in claim 2, wherein the isolating structure has resonant frequencies that are outside of an operating frequency range of the aerosol generator.
  • 6. An aerosol generator system as in claim 5, wherein the operating frequency range is about 50 kHz to about 250 kHz.
  • 7. An aerosol generator system as in claim 1, wherein the arms have a contoured shape.
  • 8. An aerosol generator system as in claim 1, wherein the vibratable member has a center portion containing the apertures, wherein the center portion is dome shaped in geometry, and wherein the apertures taper from the rear to the front.
  • 9. An aerosolization device comprising: a housing; and an aerosol generator disposed within the housing, the aerosol generator comprising a vibratable member having a front, a rear and a plurality of apertures extending between the front and the rear, wherein the vibratable member is configured to vibrate at ultrasonic frequencies, an isolating structure coupled to the aerosol generator, and operably connected to the housing, wherein the isolating structure has a vibrational impedance that is sufficient to substantially vibrationally isolate the aerosol generator from the housing; andwherein the isolating structure comprises a plurality of arms extending from the aerosol generator.
  • 10. A device as in claim 9, wherein the plurality of arms extended from a support element disposed about an outer periphery of the vibratable member, a vibratable element coupled to the support element to vibrate the vibratable member, wherein the isolating structure and the support element are integrally formed together.
  • 11. A device as in claim 10, wherein the isolating member is configured such that the ratio of forces transmitted to the support element to forces at an outer edge of the support element is less than about 30%.
  • 12. A device as in claim 11, wherein the ratio is less than about 10%.
  • 13. A device as in claim 9, wherein the arms have a contoured shape.
  • 14. A device as in claim 9, wherein the isolating structure has resonant frequencies that are outside of an operating frequency range of the aerosol generator.
  • 15. A device as in claim 14, wherein the operating frequency range is about 50 kHz to about 250 kHz.
  • 16. A device as in claim 9, wherein the vibratable member has a center portion containing the apertures, wherein the center portion is dome shaped in geometry, and wherein the apertures taper from the rear to the front.
  • 17. A method for aerosolizing a liquid, the method comprising: providing an aerosol generator comprising a vibratable member having a front, a rear, and a plurality of apertures extending between the front and the rear, and a vibratable element to vibrate the vibratable member;supplying a liquid to the rear of the vibratable member; andvibrating the vibratable member with the vibratable element to eject liquid droplets through the apertures while substantially vibrationally isolating the aerosol generator with an isolating structure that is operably coupled to a support structure;wherein the isolating structure comprises a plurality of arms extending from the aerosol generator, wherein the isolating structure is configured to vibrationally isolate the aerosol generator from the support structure.
  • 18. A method as in claim 17, further comprising vibrating the vibratable member at a frequency that is different than a resonant frequency of the isolating structure, and wherein the vibratable member is vibrated at a frequency in the range from about 50 kHz to about 250 kHz, and wherein the ratio of forces transmitted to the support structure to forces at an outer edge of the aerosol generator is less than about 30%.
US Referenced Citations (415)
Number Name Date Kind
550315 Allen Nov 1895 A
809159 Willis et al. Jan 1906 A
1680616 Horst Aug 1928 A
2022520 Philbrick Nov 1935 A
2101304 Wright Dec 1937 A
2158615 Wright May 1939 A
2187528 Wing Jan 1940 A
2223541 Baker Dec 1940 A
2266706 Fox et al. Dec 1941 A
2283333 Martin May 1942 A
2292381 Klagges Aug 1942 A
2360297 Wing Oct 1944 A
2375770 Dahlberg May 1945 A
2383098 Wheaton Aug 1945 A
2404063 Healy Jul 1946 A
2430023 Longmaid Nov 1947 A
2474996 Wallis Jul 1949 A
2512004 Wing Jun 1950 A
2521657 Severy Sep 1950 A
2681041 Zodtner et al. Jun 1954 A
2705007 Gerber Mar 1955 A
2735427 Sullivan Feb 1956 A
2764946 Henderson Oct 1956 A
2764979 Henderson Oct 1956 A
2779623 Eisenkraft Jan 1957 A
2935970 Morse et al. May 1960 A
3103310 Lang Sep 1963 A
3325031 Singier Jun 1967 A
3411854 Rosler et al. Nov 1968 A
3515348 Coffman, Jr. Jun 1970 A
3550864 East Dec 1970 A
3558052 Dunn Jan 1971 A
3561444 Boucher Feb 1971 A
3563415 Ogle Feb 1971 A
3680954 Frank Aug 1972 A
3719328 Hindman Mar 1973 A
3738574 Guntersdorfer et al. Jun 1973 A
3771982 Dobo Nov 1973 A
3790079 Berglund et al. Feb 1974 A
3804329 Martner Apr 1974 A
3812854 Michaels et al. May 1974 A
3838686 Szekely Oct 1974 A
3842833 Ogle Oct 1974 A
3865106 Palush Feb 1975 A
3903884 Huston et al. Sep 1975 A
3906950 Cocozza Sep 1975 A
3908654 Lhoest et al. Sep 1975 A
3950760 Rauch et al. Apr 1976 A
3951313 Coniglione Apr 1976 A
3958249 DeMaine et al. May 1976 A
3970250 Drews Jul 1976 A
3983740 Danel Oct 1976 A
3993223 Welker, III et al. Nov 1976 A
4005435 Lundquist et al. Jan 1977 A
4030492 Simburner Jun 1977 A
4052986 Scaife Oct 1977 A
4059384 Holland et al. Nov 1977 A
D246574 Meierhoefer Dec 1977 S
4076021 Thompson Feb 1978 A
4083368 Freezer Apr 1978 A
4094317 Wasnich Jun 1978 A
4101041 Mauro, Jr. et al. Jul 1978 A
4106503 Rsenthal et al. Aug 1978 A
4109174 Hodgson Aug 1978 A
4113809 Abair et al. Sep 1978 A
D249958 Meierhoefer Oct 1978 S
4119096 Drews Oct 1978 A
4121583 Chen Oct 1978 A
4159803 Cameto et al. Jul 1979 A
4207990 Weiler et al. Jun 1980 A
4210155 Grimes Jul 1980 A
4226236 Genese Oct 1980 A
4240081 Devitt Dec 1980 A
4240417 Holever Dec 1980 A
4248227 Thomas Feb 1981 A
4261512 Zierenberg Apr 1981 A
D259213 Pagels May 1981 S
4268460 Boiarski et al. May 1981 A
4294407 Reichl et al. Oct 1981 A
4298045 Weiler et al. Nov 1981 A
4299784 Hense Nov 1981 A
4300546 Kruber Nov 1981 A
4301093 Eck Nov 1981 A
4319155 Makai et al. Mar 1982 A
4334531 Reichl et al. Jun 1982 A
4336544 Donald et al. Jun 1982 A
4338576 Takahashi et al. Jul 1982 A
4368476 Uehara et al. Jan 1983 A
4368850 Szekely Jan 1983 A
4374707 Pollack Feb 1983 A
4389071 Johnson, Jr. et al. Jun 1983 A
4408719 Last Oct 1983 A
4428802 Kanai et al. Jan 1984 A
4431136 Janner et al. Feb 1984 A
4454877 Miller et al. Jun 1984 A
4465234 Maehara et al. Aug 1984 A
4474251 Johnson, Jr. Oct 1984 A
4474326 Takahashi Oct 1984 A
4475113 Lee et al. Oct 1984 A
4479609 Maeda et al. Oct 1984 A
4512341 Lester Apr 1985 A
4530464 Yamamoto et al. Jul 1985 A
4533082 Maehara et al. Aug 1985 A
4539575 Nilsson Sep 1985 A
4544933 Heinzl Oct 1985 A
4546361 Brescia et al. Oct 1985 A
4550325 Viola Oct 1985 A
4566452 Farr Jan 1986 A
4591883 Isayama May 1986 A
4593291 Howkins Jun 1986 A
4605167 Maehara Aug 1986 A
4613326 Szwarc Sep 1986 A
4620201 Heinzl et al. Oct 1986 A
4628890 Freeman Dec 1986 A
4632311 Nakane et al. Dec 1986 A
4658269 Rezanka Apr 1987 A
4659014 Soth et al. Apr 1987 A
4677975 Edgar et al. Jul 1987 A
4678680 Abowitz Jul 1987 A
4679551 Anthony Jul 1987 A
4681264 Johnson, Jr. Jul 1987 A
4693853 Falb et al. Sep 1987 A
4702418 Carter et al. Oct 1987 A
4722906 Guire Feb 1988 A
4753579 Murphy Jun 1988 A
4790479 Matsumoto et al. Dec 1988 A
4793339 Matsumoto et al. Dec 1988 A
4796807 Bendig et al. Jan 1989 A
4799622 Ishikawa et al. Jan 1989 A
4805609 Roberts et al. Feb 1989 A
4819629 Jonson Apr 1989 A
4819834 Thiel Apr 1989 A
4826080 Ganser May 1989 A
4826759 Guire et al. May 1989 A
4828886 Hieber May 1989 A
4843445 Stemme Jun 1989 A
4849303 Graham et al. Jul 1989 A
4850534 Takahashi et al. Jul 1989 A
4865006 Nogi et al. Sep 1989 A
4871489 Ketcham Oct 1989 A
4872553 Suzuki et al. Oct 1989 A
4877989 Drews et al. Oct 1989 A
4888516 Daeges et al. Dec 1989 A
4922901 Brooks et al. May 1990 A
4926915 Deussen et al. May 1990 A
4934358 Nilsson et al. Jun 1990 A
4954225 Bakewell Sep 1990 A
4957239 Tempelman Sep 1990 A
4964521 Wieland et al. Oct 1990 A
D312209 Morrow et al. Nov 1990 S
4968299 Ahlstrand et al. Nov 1990 A
4971665 Sexton Nov 1990 A
4973493 Guire Nov 1990 A
4976259 Higson et al. Dec 1990 A
4979959 Guire Dec 1990 A
4994043 Ysebaert Feb 1991 A
5002048 Makiej, Jr. Mar 1991 A
5002582 Guire et al. Mar 1991 A
5007419 Weinstein et al. Apr 1991 A
5016024 Lam et al. May 1991 A
5021701 Takahashi et al. Jun 1991 A
5022587 Hochstein Jun 1991 A
5024733 Abys et al. Jun 1991 A
5046627 Hansen Sep 1991 A
5062419 Rider Nov 1991 A
5063396 Shiokawa et al. Nov 1991 A
5063922 Häkkinen Nov 1991 A
5073484 Swanson et al. Dec 1991 A
5076266 Babaev Dec 1991 A
5080093 Raabe et al. Jan 1992 A
5080649 Vetter Jan 1992 A
5086765 Levine Feb 1992 A
5086785 Gentile et al. Feb 1992 A
5115803 Sioutas May 1992 A
5115971 Greenspan et al. May 1992 A
D327008 Friedman Jun 1992 S
5122116 Kriesel et al. Jun 1992 A
5129579 Conte Jul 1992 A
5134993 Van Der Linden et al. Aug 1992 A
5139016 Waser Aug 1992 A
5140740 Weigelt Aug 1992 A
5147073 Cater Sep 1992 A
5152456 Ross et al. Oct 1992 A
5157372 Langford Oct 1992 A
5164740 Ivri Nov 1992 A
5169029 Behar et al. Dec 1992 A
5170782 Kocinski Dec 1992 A
5180482 Abys et al. Jan 1993 A
5186164 Raghuprasad Feb 1993 A
5186166 Riggs et al. Feb 1993 A
5198157 Bechet Mar 1993 A
5201322 Henry et al. Apr 1993 A
5213860 Laing May 1993 A
5217148 Cater Jun 1993 A
5217492 Guire et al. Jun 1993 A
5227168 Chvapil Jul 1993 A
5230496 Shillington et al. Jul 1993 A
5245995 Sullivan et al. Sep 1993 A
5248087 Dressler Sep 1993 A
5258041 Guire et al. Nov 1993 A
5261601 Ross et al. Nov 1993 A
5263992 Guire Nov 1993 A
5279568 Cater Jan 1994 A
5297734 Toda Mar 1994 A
5299739 Takahashi et al. Apr 1994 A
5303854 Cater Apr 1994 A
5309135 Langford May 1994 A
5312281 Takahashi et al. May 1994 A
5313955 Rodder May 1994 A
5319971 Osswald et al. Jun 1994 A
5320603 Vetter et al. Jun 1994 A
5322057 Raabe et al. Jun 1994 A
5342011 Short Aug 1994 A
5342504 Hirano et al. Aug 1994 A
5347998 Hodson et al. Sep 1994 A
5348189 Cater Sep 1994 A
5350116 Cater Sep 1994 A
5355872 Riggs et al. Oct 1994 A
5357946 Kee et al. Oct 1994 A
5372126 Blau Dec 1994 A
5383906 Burchett et al. Jan 1995 A
5388571 Roberts et al. Feb 1995 A
5392768 Johansson et al. Feb 1995 A
5396883 Knupp et al. Mar 1995 A
5414075 Swan et al. May 1995 A
5415161 Ryder May 1995 A
5419315 Rubsamen May 1995 A
5426458 Wenzel et al. Jun 1995 A
5431155 Marelli Jul 1995 A
5435282 Haber et al. Jul 1995 A
5435297 Klein Jul 1995 A
5437267 Weinstein et al. Aug 1995 A
5445141 Kee et al. Aug 1995 A
D362390 Weiler Sep 1995 S
5449502 Igusa et al. Sep 1995 A
5452711 Gault Sep 1995 A
5458135 Patton et al. Oct 1995 A
5458289 Cater Oct 1995 A
5474059 Cooper Dec 1995 A
5477992 Jinks et al. Dec 1995 A
5479920 Piper et al. Jan 1996 A
5487378 Robertson et al. Jan 1996 A
5489266 Grimard Feb 1996 A
5497944 Weston et al. Mar 1996 A
D369212 Snell Apr 1996 S
5511726 Greenspan et al. Apr 1996 A
5512329 Guire et al. Apr 1996 A
5512474 Clapper et al. Apr 1996 A
5515841 Robertson et al. May 1996 A
5515842 Ramseyer et al. May 1996 A
5516043 Manna et al. May 1996 A
5518179 Humberstone et al. May 1996 A
5529055 Gueret Jun 1996 A
5533497 Ryder Jul 1996 A
5542410 Goodman et al. Aug 1996 A
5549102 Lintl et al. Aug 1996 A
5560837 Trueba Oct 1996 A
5563056 Swan et al. Oct 1996 A
D375352 Bologna Nov 1996 S
5579757 McMahon et al. Dec 1996 A
5582330 Iba Dec 1996 A
5584285 Salter et al. Dec 1996 A
5586550 Ivri et al. Dec 1996 A
5588166 Burnett Dec 1996 A
5601077 Imbert Feb 1997 A
5609798 Liu et al. Mar 1997 A
5632878 Kitano May 1997 A
5635096 Singer et al. Jun 1997 A
5637460 Swan et al. Jun 1997 A
5647349 Ohki et al. Jul 1997 A
5653227 Barnes et al. Aug 1997 A
5654007 Johnson et al. Aug 1997 A
5654162 Guire et al. Aug 1997 A
5654460 Rong Aug 1997 A
5657926 Toda Aug 1997 A
5660166 Lloyd Aug 1997 A
5664557 Makiej, Jr. Sep 1997 A
5664706 Cater Sep 1997 A
5665068 Takamura Sep 1997 A
5666946 Langenback Sep 1997 A
5670999 Takeuchi et al. Sep 1997 A
5685491 Marks et al. Nov 1997 A
5692644 Gueret Dec 1997 A
5707818 Chudzik et al. Jan 1998 A
5709202 Lloyd et al. Jan 1998 A
5714360 Swan et al. Feb 1998 A
5714551 Bezwada et al. Feb 1998 A
5718222 Lloyd et al. Feb 1998 A
D392184 Weiler Mar 1998 S
5724957 Rubsamen et al. Mar 1998 A
5744515 Clapper Apr 1998 A
5752502 King May 1998 A
5755218 Johansson et al. May 1998 A
5758637 Ivri et al. Jun 1998 A
5775506 Grabenkort Jul 1998 A
5788665 Sekins Aug 1998 A
5788819 Onishi et al. Aug 1998 A
5790151 Mills Aug 1998 A
5810004 Ohki et al. Sep 1998 A
5819730 Stone et al. Oct 1998 A
5823179 Grychowski et al. Oct 1998 A
5823428 Humberstone et al. Oct 1998 A
5829723 Brunner et al. Nov 1998 A
5836515 Fonzes Nov 1998 A
5839617 Cater et al. Nov 1998 A
5842468 Denyer et al. Dec 1998 A
5865171 Cinquin Feb 1999 A
5878900 Hansen Mar 1999 A
5893515 Hahn et al. Apr 1999 A
5894841 Voges Apr 1999 A
5897008 Hansen Apr 1999 A
5910698 Yagi Jun 1999 A
5915377 Coffee Jun 1999 A
5918637 Fleischman Jul 1999 A
5925019 Ljungquist Jul 1999 A
5938117 Ivri Aug 1999 A
5950619 Van Der Linden et al. Sep 1999 A
5954268 Joshi et al. Sep 1999 A
5960792 Lloyd et al. Oct 1999 A
5964417 Amann et al. Oct 1999 A
5970974 Van Der Linden et al. Oct 1999 A
5976344 Abys et al. Nov 1999 A
5993805 Sutton et al. Nov 1999 A
6007518 Kriesel et al. Dec 1999 A
6012450 Rubsamen Jan 2000 A
6014970 Ivri et al. Jan 2000 A
6026809 Abrams et al. Feb 2000 A
6032665 Psaros Mar 2000 A
6037587 Dowell et al. Mar 2000 A
6045215 Coulman Apr 2000 A
6045874 Himes Apr 2000 A
6047818 Warby et al. Apr 2000 A
6055869 Stemme et al. May 2000 A
6060128 Kim et al. May 2000 A
6062212 Davison et al. May 2000 A
6068148 Weiler May 2000 A
6085740 Ivri et al. Jul 2000 A
6096011 Trombley, III et al. Aug 2000 A
6105877 Coffee Aug 2000 A
6106504 Urrutia Aug 2000 A
6116234 Genova et al. Sep 2000 A
6123413 Agarwal et al. Sep 2000 A
6139674 Markham et al. Oct 2000 A
6142146 Abrams et al. Nov 2000 A
6145963 Pidwerbecki et al. Nov 2000 A
6146915 Pidwerbecki et al. Nov 2000 A
6152130 Abrams et al. Nov 2000 A
6155676 Etheridge et al. Dec 2000 A
6158431 Poole Dec 2000 A
6161536 Redmon et al. Dec 2000 A
6163588 Matsumoto et al. Dec 2000 A
6182662 McGhee Feb 2001 B1
6186141 Pike et al. Feb 2001 B1
6196218 Voges Mar 2001 B1
6196219 Hess et al. Mar 2001 B1
6205999 Ivri et al. Mar 2001 B1
6216916 Maddox et al. Apr 2001 B1
6223746 Jewett et al. May 2001 B1
6235177 Borland et al. May 2001 B1
6254219 Agarwal et al. Jul 2001 B1
6270473 Schwebel Aug 2001 B1
6273342 Terada et al. Aug 2001 B1
6318640 Coffee Nov 2001 B1
6328030 Kidwell et al. Dec 2001 B1
6328033 Avrahami Dec 2001 B1
6341732 Martin et al. Jan 2002 B1
6358058 Strupat et al. Mar 2002 B1
6394363 Arnott et al. May 2002 B1
6402046 Loser Jun 2002 B1
6405934 Hess et al. Jun 2002 B1
6427682 Klimowicz et al. Aug 2002 B1
6443146 Voges Sep 2002 B1
6443366 Hirota et al. Sep 2002 B1
6467476 Ivri et al. Oct 2002 B1
6530370 Heinonen Mar 2003 B1
6540153 Ivri Apr 2003 B1
6540154 Ivri et al. Apr 2003 B1
6543443 Klimowicz et al. Apr 2003 B1
6546927 Litherland et al. Apr 2003 B2
6550472 Litherland et al. Apr 2003 B2
6554201 Klimowicz et al. Apr 2003 B2
6615824 Power Sep 2003 B2
6629646 Ivri Oct 2003 B1
6640804 Ivri Nov 2003 B2
6651650 Yamamoto et al. Nov 2003 B1
6732944 Litherland et al. May 2004 B2
6755189 Ivri et al. Jun 2004 B2
6769626 Haveri Aug 2004 B1
6782886 Narayan et al. Aug 2004 B2
6814071 Klimowicz et al. Nov 2004 B2
6845770 Klimowicz et al. Jan 2005 B2
6851626 Patel et al. Feb 2005 B2
6860268 Bohn et al. Mar 2005 B2
20010013554 Borland et al. Aug 2001 A1
20010015737 Truninger et al. Aug 2001 A1
20020011247 Ivri et al. Jan 2002 A1
20020104530 Ivri et al. Aug 2002 A1
20020121274 Borland et al. Sep 2002 A1
20020134372 Loeffler et al. Sep 2002 A1
20020134374 Loeffler et al. Sep 2002 A1
20020134375 Loeffler et al. Sep 2002 A1
20020134377 Loeffler et al. Sep 2002 A1
20020162551 Litherland Nov 2002 A1
20030140921 Smith et al. Jul 2003 A1
20030150445 Power et al. Aug 2003 A1
20030150446 Patel et al. Aug 2003 A1
20030226906 Ivri Dec 2003 A1
20040000598 Ivri Jan 2004 A1
20040004133 Ivri et al. Jan 2004 A1
20040035490 Power Feb 2004 A1
20040050947 Power et al. Mar 2004 A1
20040139963 Ivri et al. Jul 2004 A1
20040139968 Loeffler et al. Jul 2004 A1
20040256488 Loeffler et al. Dec 2004 A1
20050011514 Power et al. Jan 2005 A1
Foreign Referenced Citations (45)
Number Date Country
477 855 Sep 1969 CH
555 681 Nov 1974 CH
0 049 636 Apr 1982 EP
0 103 161 Mar 1984 EP
0 134 847 Mar 1985 EP
0 178 925 Apr 1986 EP
0 387 222 Sep 1990 EP
0 432 992 Jun 1991 EP
0 476 991 Mar 1992 EP
0 480 615 Apr 1992 EP
0 510 648 Oct 1992 EP
0 516 565 Dec 1992 EP
0 542 723 May 1993 EP
0 933 138 Apr 1999 EP
0 923 957 Jun 1999 EP
1 142 600 Oct 2001 EP
2 692 569 Dec 1993 FR
973 458 Oct 1964 GB
1 454 597 Nov 1976 GB
2 073 616 Oct 1981 GB
2 101 500 Jan 1983 GB
2 177 623 Jan 1987 GB
2 240 494 Jul 1991 GB
2 272 389 May 1994 GB
2 279 571 Jan 1995 GB
57-023852 Feb 1982 JP
57-105608 Jul 1982 JP
58-061857 Apr 1983 JP
58-139757 Aug 1983 JP
59-142163 Aug 1984 JP
60-004714 Jan 1985 JP
61-008357 Jan 1986 JP
61-215059 Sep 1986 JP
02-135169 May 1990 JP
02-189161 Jul 1990 JP
60-07721 Jan 1994 JP
WO 9207600 May 1992 WO
WO 9211050 Sep 1992 WO
WO 9217231 Oct 1992 WO
WO 9301404 Jan 1993 WO
WO 93010910 Jun 1993 WO
WO 9409912 May 1994 WO
WO 9609229 Mar 1996 WO
WO 9917888 Apr 1999 WO
WO 0037132 Jun 2000 WO
Related Publications (1)
Number Date Country
20040188534 A1 Sep 2004 US
Continuations (1)
Number Date Country
Parent 09848104 May 2001 US
Child 10821444 US