Patent Application
20110214328
This application relates to accessories for firearms. More particularly, embodiments according to this application relate to rail systems that may include one or more accessory rails.
An operator must grip a firearm on or adjacent the barrel to stabilize the firearm during operation. Rail systems can be provided to attach accessories that are available to aid in the proper or enhanced operation of firearms. Further, rail systems can prevent items from directly attaching to the barrel, which can alter the barrel slightly and can adversely affect the accuracy of the firearm. Also, rail systems can protect the hand from the heat of the barrel.
Rail systems and/or firearm accessories add weight to the firearm. Accessories and/or accessory mounting devices need to mount securely to the rail systems and certain accessories need power to operate. Further, rail systems and/or accessory mounting devices must be constructed ruggedly and to withstand heavy use. In addition, rail systems and/or accessory mounting devices need to be cheap, fast, simple, and accurately manufactured.
Accordingly, it is an object of this application, to address in whole or in part, at least the foregoing and other deficiencies in the related art.
It is another object of this application, to provide in whole or in part, at least the advantages described below.
It is an object of this application to provide a rail system for a firearm, accessory rail, and/or methods for making and using the same. It is an object of this application to provide a rail system including more secure accessory mounting and methods thereof. It is an object of this application to provide an integral rail system and/or method of manufacturing. It is an object of this application to provide a rail system having a power supplied accessory mounting system and methods thereof. It is an object of this application to provide a rail system having longitudinal conduit channels that are disposed internal to a rail system to increase protection and methods thereof.
Novel features that are characteristic of the embodiments of the application are set forth with particularity in the claims. The application itself may be best be understood, with respect to its organization and method of operation, with reference to the following description taken in connection with the accompanying drawings in which:
Referring to
Any or all of top rail 22, side rails 24, and bottom rail 26 can be referred to herein as “rail assembly.” Additionally, while top rail 22, side rails 24, and bottom rail 26 are illustrated carried by rail system 20, some, or all may be omitted as desired. Additionally, unique structures of the rail assembly described herein can be used on any firearm without the use of a hand guard or in conjunction with other hand guard systems. Rails, accessory rails, and/or various rail assemblies described herein such as rail system 20 (and/or rail system 30, rail system 1130 described below) adhere to all the critical dimensions of MIL-STD 1913, and/or Picatinny rail, which is hereby incorporated by reference in its entirety.
Referring now to
In the event that one or all of top accessory rail 32, side accessory rails 34, or bottom accessory rail 36 are used without tubular body 38, they may be attached to a firearm using another rail system or by structures other than a rail system (e.g., attachment rings, hand guards, or other mounting devices). As described herein, structure mounting one or all of the top accessory rail 32, side accessory rails 34, and/or bottom accessory rail 36 can be included in the “mounting structure,” which is intended to include any structures mounting one or all of the top accessory rail 32, side accessory rails 34, or bottom accessory rail 36 on a firearm, including tubular body 38. Further, one or all of top accessory rail 32, side accessory rails 34, and bottom accessory rail 36 and the mounting structure for the rails can be considered to be in the “rail system” as described herein.
Referring to
A plurality of equally spaced transverse ribs 33 can be formed on a portion, a majority, or substantially the entire length of top accessory rail 32, side accessory rails 34, and/or bottom accessory rail 36 separated or interspaced by a plurality of corresponding recesses 35. Transverse ribs 33 can be used to mount accessories to a firearm and can reduce or prevent movement (e.g., forward and rearward) of accessories attached thereto.
With reference to
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Dimensions and locations of anchor slots 65, according to embodiments of the application are intended to provide additional mounting surfaces and/or access to conduits 39. For example, anchor slots 65 can provide at least one recessed surface relative to lateral surface 62 of transverse ribs 33 (e.g., to mount accessories thereto).
Referring to
In one embodiment, a cross-section of anchor slots 65 can operate to secure a mounted accessory. For example, a shoulder or radial lip can provide an engagement surface matched to engage a protruding or engaging surface of mounting structure of an accessory.
Recessed engagement surfaces 75 can be provided for a detachable frictional fit or press-fit interface with a corresponding engaging surface on a mounted accessory. For example, a frictional fit or press-fit can be used between recessed engagement surface 75 and a corresponding engaging surface of a mounted accessory.
In one embodiment, engagement surfaces 75 in lateral face 62a can combine with an additional surface on rail system 30 such as adjacent lateral face 62b to simultaneously engage a first portion and a second portion of a mounting structure of an accessory when that accessory is mounted to rail system 30. For example, in a ski-boot type arrangement, the first portion of the accessory mount can engage anchor slots 65 in lateral face 62b while the second portion of the accessory mount can subsequently lock in place against opposing lateral face 62a. Further, other combinational arrangements can be used, for example, cooperatively or forcibly engaging the first and second portions of an accessory mount at multiple separate engagement positions (e.g., in an opposing pair of anchor slots 65 in a recess 35).
Referring to
As described herein, it should be understood that bottom accessory rail 36 is substantially similar to accessory rails 32 and/or 34 with the addition of central groove 47. It is understood that central groove 47 can be used, as desired, with top accessory rails 32 and/or side accessory rails 34. It is understood further, in one embodiment, central groove 47 can have a different cross-section (e.g., stepped, angled, tiered, or the like) to provide additional internal referencing surfaces.
Referring to
Since conduits 39 can provide passage for one or more electrical connections (e.g., insulated cables) to provide power to accessories mounted on the top accessory rail 32, side accessory rails 34, and/or bottom accessory rail 36, power need not be provided by each mounted accessory itself. In one embodiment, rail system 30 can provide multiple power supplies for multiple mounted accessories. By carrying a battery storage system or power supply system at or attached to an individual using a firearm, the weight of the firearm can be reduced and accuracy in using the firearm can be increased. In addition, using an external power supply and storage system, rail system 30 can allow extra power supplies to be carried for a plurality of mounted accessories mounted to top accessory rail 32, side accessory rails 34, and/or bottom accessory rail 36.
Referring to
Since mountable accessories for firearms can require different power supplies or batteries, rail mount accessory electrical cable 910 in combination with rail system 30 can be adapted for use with but not limited to multiple mountable accessories such as lights, lasers and night vision equipment that can have identical or different power supply requirements. For example, mountable accessories can use different battery types such as Aimpoint-type batteries, AAA type batteries, AA type batteries, rechargeable type batteries, or 123 series Lithium batteries. In one embodiment, power supply and storage unit 960 can include a plurality of externally or internally accessible different terminal adaptor types 962, 963, 964, and 965 corresponding to (e.g., connecting) adaptor types 922, 923, 924, and 925. Power supply and storage unit 960 can further include environmentally protected storage (e.g. water, dust, and rattle-resistant sealed cavity) having an external access cover for carrying reserve electrical power supplies or batteries. In one embodiment, the power supply and storage unit 960 can be exterior to rail system 30 and carried by an individual or located at a position of the firearm that can have reduced or no interference with proper operation of the firearm.
In one embodiment, exemplary rail assembly electrical cables 910 can supply multiple different reference voltage levels on insulated wires affixed in one conduit unit (e.g., conduit unit 39a) or in each of conduit units 39a, 39b, 39c, respectively. For example, a first reference voltage, a second reference voltage, and a third reference voltage can be provided through conduit units 39b, 39a, and 39c, respectively. Exemplary voltage levels can include 0 volts, 5 volts, 10 volts, or 12 volts. Further, insulated access to the different voltage levels in conduits 39 or conduit units 39a, 39b, and 39c can be provided using anchor slots 65.
Referring to
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Milling operations can then be used to form desired surfaces/features such as exterior and optional interior referencing surfaces on rail accessory protrusions. For example, longitudinal cuts (e.g., up or down) as known to one skilled in the art can form outer and central grooves such as grooves 41, grooves 42, and grooves 47. Further, other milling operations can be used to form holes (e.g., openings 38a) to reduce mass or weight of the unitary tubular rail system body. For example, longitudinal slots 38b may be formed between the rail accessory protrusions (block 1015).
In one embodiment, conduits extending longitudinally though rail system unitary body are formed in block 1015. Alternatively, such conduits can be subsequently formed in rail system unitary body by additional later milling operations.
Selected dimensions (e.g., critical dimensions) of accessory rails can have reduced or limited error tolerances. For example, selected accessory rail dimensions are intended for use with accessories to be subsequently mounted thereon. Thus, it is desirable that dimensions used in mounting accessories such as slot width, slot spacing, rib width and/rib spacing (e.g., picatinny rails) be accurate.
In one embodiment, recesses are formed in rail accessory protrusions (e.g., to determine longitudinally spaced ribs) by rotating unitary tubular rail system body (e.g., 200 revolutions per minute, 500 revolutions per minute, 700 revolutions per minute, 1,000 revolutions per minute, 5,000 revolutions per minute, or 10,000 revolutions per minute) about its longitudinal axis. Rotating rail system unitary body can be directed against a stationary manufacturing material removing tool. By rotating the unitary tubular rail system body to form recesses 35, dimensions of slot width, slot spacing, rib width and/rib spacing can be controlled (e.g., increased accuracy) (block 1020). In one embodiment, opposing vertical lateral walls used to determine one slot or recess can have increase accuracy from a bottom surface to a top surface thereof. For example, accuracy in such slot/rib dimensions can be increased by 1%, 3%, 5% or more.
In one embodiment, a bottom surface of recesses formed between opposing lateral faces have a curved surface (e.g., a convex surface when viewed from a front/back perspective). The curvature of a bottom surface between opposing lateral faces can be related to the radial size of rail system unitary body. Reduced debris in the recess can result because the curved or sloped bottom surface can trap fewer debris and/or previously trapped debris will be forced or urged out of the recess by the slope or curvature.
Anchor slots can then be formed in lateral faces of rail accessory protrusions by rotating unitary tubular rail system body (e.g., 400 revolutions per minute) about its longitudinal axis against a braced stationary manufacturing material removing tool. By rotating the unitary tubular rail system body to form the anchor slots, dimensions of anchor slot can be controlled (block 1025). In one embodiment, a plurality of anchor slots can be formed over each other in lateral faces of ribs in accessory rails. In one embodiment, anchor slots 65 are formed in the bottom surface of recesses 35.
In one embodiment, cross-sections of the anchor slots can be circular, oval, parabolic, stepped, polygonal, non-linear, include at least one right angle or the like. In addition, controlled spacing for a plurality of recesses 35 for two or more accessory rails can be provided.
In block 1030, conversion of the unitary tubular rail system body into a rail system can be completed. For example, additional desired surfaces may be milled. Further, for example, insulated electrical lines (wires) may then be disposed in conduits of the unitary tubular rail system body. Alternatively, electrical lines may be disposed in conduits during or after block 1010. In one embodiment, multiple lines may be disposed in a single conduit or in a single accessory rail where each conduit can have a different voltage level (e.g., ground voltage, first higher accessory voltage level, second different accessory voltage level). Further, in one embodiment, insulators may be provided to cover exposed electrical lines in conduits 39 in recesses 35 where accessories will not electrically connect thereto. Alternatively, insulators may be provided to cover exposed electrical lines at selected anchor slots 65 where accessories will not electrically connect.
From block 1030, a process can end. Although, described in sequence, it is understood that operations described in the method of
Referring to
Sizes and cross-sections of first portion 1139-1 and second portion 1139-2 can be varied according to the desired application of rail system 1130. In one embodiment, second portion 1139-2 is larger than first portion 1139-1. In one embodiment, second portion 1139-2 can connect first portion 1139-1 to an outer radial surface of tubular body 1138 or a top surface of tab 1133. Alternatively, first portion 1139-1 can in conduit units 1139a or 1139c can be connected by second portion 1139-2 to outer side surfaces (e.g., groove 1141, 1142) of tab 1133.
Referring to
Insulating disk 1250 can be configured with a plurality (e.g., three) of conduit access units 1252 to allow individual access to conduit units 39a, 39b, 39c. In one embodiment, conduit access units 1252 can move between a first position to allow access (e.g., through itself) to a corresponding conduit 39 and a second position to insulate the conduit 39 from access.
Alternatively, insulating disk 1250 can include conduit access unit 1254 that allows concurrent access to a plurality of conduit units 39a, 39b, 39c. In one embodiment, conduit access unit 1254 can move between a first position to allow access (e.g., through itself) to all corresponding conduit units 39a, 39b, 39c at the same time and a second position to insulate all conduit units 39a, 39b, 39c from access.
Insulating disk 1250 can be entirely formed of an insulating material to prevent access to conduits 39 in a corresponding ring of recesses 35 for each of top accessory rail 32, side accessory rails 34, and bottom accessory rail 36. Insulating disk 1250 can have a single conduit access unit 1252, 1254 to allow only a single accessory rail to electrically connect to conduits 39 in a corresponding ring of recesses 35 for each of top accessory rail 32, side accessory rails 34, and bottom accessory rail 36. Embodiments of an insulating disk 1250 can be disposed partially within, entirely within, covering or over corresponding anchor slots 65.
Although grooves 41, 42, and/or 49 are illustrated as a single groove or cut, a plurality of cuts or grooves may be used, for example, to define various surfaces 41a, 41b. Further, longitudinal grooves 41 and/or 42 can define a plurality of additional external referencing surfaces, for example, a fourth external reference surface can be located between first and second external referencing surfaces 41a and 41b or 42a and 42b. Alternatively, additional external referencing surfaces can be below first external referencing surfaces 41a or 42a.
Although anchor slots 65 are shown as on only all first lateral surfaces 62a, embodiments are not intended to be so limited. For example, anchor slots 65 can occur only on a subset of selected first lateral faces 62a, or only on a subset of second lateral faces 62b both lateral faces 62a and 62b of at least one identical rib 33 or corresponding opposing lateral face 62a of first rib 33 and lateral face 62b of second rib 33 that have at least two ribs 33 therebetween.
Although anchor slots 65 are shown having a prescribed site smaller than conduits 39, embodiments are not intended to be so limited. For example, anchor slots 65 may be larger than conduits 39. Further, a size of anchor slots 65 can vary within an accessory rail.
Although anchor slots 65 are shown as substantially extending continuously across a lateral surface of rib 33, embodiments are not intended to be so limited. For example, anchor slots 65 can extend over less than 50% or less than 20% of a lateral face of rib 33. Further for example, anchor slots 65 can be intermittent across rib 33 or in sections having different heights across rib 33.
Although embodiments of the application have been described with respect to electrical power being provided via conduits to mounted accessories, embodiments of the application are not intended to be so limited. For example, mountable accessories (e.g., sensors, cameras, imaging terminals, etc.) that can record and transmit data can be configured to use electrical cabling accessed via recesses 35 or anchor slots 65 to transmit data for storage or display at an accessible terminal of device electrically connected to another point of the cabling provided via conduits in rail systems according to the application.
A small sample of systems methods and apparatus that are described herein.
In one embodiment a rail system assembly can include a tubular body to couple to the firearm over a portion of the barrel in a substantially coaxially and radially spaced relationship; at least one accessory rail at a predetermined position of the tubular body, said at least one rail including a plurality of ribs separated to define opposing lateral surfaces; and at least one groove in a lateral surface of a rib.
In one aspect of a rail system assembly, a front lateral face of at least one rib comprises an anchor slot including said at least one groove. In another aspect, the anchor slot removes a portion of a corresponding rib. In another aspect, the anchor slot removes a portion of a bottom surface of a recess between adjacent ribs. In another aspect, the bottom surface of the recess is curved. In another aspect, selected anchor slots insulatingly intersect at least one longitudinal conduit configured to pass through the plurality of ribs. In another aspect, the anchor slot is configured to include a curved surface, a right angle, a linear surface, a recessed engagement surface, or an engagement shoulder. In another aspect, the anchor slot is configured to operate with an opposing lateral surface to mount an accessory. In another aspect, a plurality of anchor slots includes pairs of corresponding anchor slots in opposing lateral faces of different ribs. In another aspect, the front lateral surface of comprises an additional anchor slot over the anchor slot. In another aspect, a rear lateral surface of at least one rib comprises the groove. In another aspect, said at least one accessory rail comprises a top rail, a bottom rail, or a side rail, and wherein said at least one accessory rail comprises a military-standard-1913 rail. In another aspect, at least one accessory rail comprises opposing longitudinal side grooves, the side grooves to define external reference surfaces for mounting accessories; and a longitudinal central groove between the opposing side grooves, the central groove to define internal reference surfaces for mounting accessories.
In one embodiment an accessory mount for a firearm having a longitudinal barrel can include a longitudinal mount body, said mount body to mount to the firearm in a spaced relationship; a plurality of longitudinally spaced transverse ribs extending along a surface of said mount body; and a recessed engagement surface at a lateral face of at least one transverse rib.
In one aspect of an accessory mount, the mount body comprises an accessory rail to include the plurality of transverse ribs, wherein a front lateral face of each transverse rib comprises an anchor slot including the recessed engagement surface. In another aspect, the recessed engagement surface includes a curved surface, a right angle, a linear surface, or an engagement shoulder, and the recessed engagement surface is configured to operate with an opposing lateral surface to detachably mount an accessory. In another aspect, an engaging surface of an accessory mount is configured to fixedly engage said recessed engagement surface when a corresponding accessory is mounted to the accessory mount.
In one embodiment, a method can include forming a plurality of longitudinally spaced ribs extending along a surface of said mount body; forming rail system assembly for a firearm including the longitudinally spaced ribs; and forming at least one anchor slot in a lateral surface of a rib.
In one embodiment, an accessory mount for a firearm having a longitudinal barrel can include a longitudinal mount body having a front end and a rear end, said mount body to couple to the firearm over a portion of the barrel; longitudinally spaced transverse ribs along said mount body; and a conduit to pass through a plurality of the transverse ribs.
In one aspect of an accessory mount, a power supply unit comprises a first end to connect to a power source exterior to said accessory mount, a second end to connect to an accessory mounted to selected transverse ribs; and an electrical connection unit between said first end and said second end of the power supply unit, the electrical connection unit disposed in the conduit. In another aspect, the electrical connection unit is an insulated wire or an insulated data cable in the conduit. In another aspect, the electrical connection unit is configured to pass through at least ¼ of the transverse ribs, at least ½ of the transverse ribs, at least ¾ of the transverse ribs, or all the transverse ribs. In another aspect, the conduit is accessible in a recess between adjacent transverse ribs. In another aspect, the conduit is insulatingly accessible in an anchor slot in a lateral face of at least one transverse rib. In another aspect, the anchor slot comprises an insulator configured to reciprocate between a first position to insulate the electrical connection unit in the conduit and a second position to allow access to the electrical connection unit in the conduit. In another aspect, the conduit is accessible in selected recesses between said transverse ribs, the accessory mount body comprising insulators in remaining recesses between said transverse ribs to cover corresponding anchor slots in said remaining recesses or bottom surfaces of said remaining recesses. In another aspect, the conduit comprises a plurality of conduit units. In another aspect, each conduit unit is a prescribed radial distance from a top surface of the transverse ribs. In another aspect, each conduit unit passes through different numbers of said transverse ribs. In another aspect, conduit units are configured to extend from the front surface to the rear surface having substantially equal cross-sectional dimensions, wherein a plurality of insulated cables are respectively provided in said conduit units to supply different voltage levels. In another aspect, each conduit unit includes one of a rectangular recessed configuration, a recessed teardrop configuration, an inner mounting surface accessible to an exterior surface of a corresponding transverse rib, or the inner mounting surface with a connecting passage to an exterior surface of the mount body. In another aspect, the conduit includes a recess, a recess configured to extend to an inner radial surface of the transverse ribs, a channel, a through-hole, or an internal channel In another aspect, the accessory mount comprises at least one accessory rail, said at least one accessory rail comprising a MIL-STD-1913 rail. In another aspect, at least one accessory rail comprises opposing longitudinally extending side grooves adjacent the transverse ribs, the side grooves to define external reference surfaces for mounting accessories; and a longitudinally extending central groove between the side grooves, the central groove to define internal reference surfaces for mounting accessories.
In one embodiment, an accessory mount can include a tubular body mounted over a portion of the barrel substantially coaxially and in a transversely spaced relationship; at least one accessory rail at a predetermined position of the tubular body, said at least one rail including a plurality of longitudinally spaced ribs for mounting an accessory; at least one longitudinal passageway to define an interior surface in a lateral surface of a rib or the tubular body; and an insulated conductive line disposed in the passageway.
In one aspect of an accessory mount an insulated conductive line is configured to supply a voltage or to pass electrical signals representative of data.
In one embodiment a method can include forming a plurality of accessory mount locations extending along a surface of an accessory rail; forming an accessory rail system for a firearm including the accessory rail; and providing an integrated electrical wiring assembly extending within the accessory rail system to pass through the accessory rail to the accessory mount locations.
In one aspect of a method, said forming an accessory rail system and said providing an integrated electrical wiring assembly occur at the same time, wherein the integrated electrical wiring assembly is configured to pass through a plurality of transverse ribs that include the accessory mount locations.
In one embodiment, a method can include extruding a tubular rail system unitary body at least one rail accessory protrusion, said rail system accessory protrusion to extend in a longitudinal direction along an outer radial surface of said tubular rail system unitary body; holding said tubular rail system unitary body stationary; modifying at least one surface of said at least one rail accessory protrusion by moving a material removing device along said at least one surface of said stationary tubular rail system unitary body; rotating said rail system unitary body around a central longitudinal axis; and removing recesses to form opposing lateral faces of adjacent transverse ribs using the material removing device, said material removing device being held stationary during said rotating.
In one aspect of a method said rotating comprises rotating at speeds greater than 200 revolutions per minute or 500 revolutions per minute. In another aspect a bottom surface of a recess between adjacent transverse ribs is a convex curved surface. In another aspect, a lower surface between transverse ribs includes a substantially radially flat surface a prescribed distance from a central longitudinal axis of the tubular rail system unitary body. In another aspect, a depth of bottom surfaces of recesses relative to top surfaces of adjacent transverse ribs increases from a middle region to outer lateral edges. In another aspect, a bottom surface of recesses between adjacent transverse ribs is curved. In another aspect, the method comprises additionally rotating said rail system unitary body around the central longitudinal axis; and removing material in said lateral face of at least one transverse rib to form anchor slots using the material removing device, said material removing device being held stationary during said additionally rotating. In another aspect a plurality of anchor slots include pairs of corresponding anchor slots in opposing lateral faces of separated transverse ribs, additional anchor slots stacked in a single lateral face, said anchors slots in front lateral faces of said transverse ribs, or said anchor slots in rear lateral faces of said transverse ribs. In another aspect, selected anchor slots intersect a plurality of longitudinal conduits that pass through a portion of said at least one transverse rib. In another aspect, the method comprises forming anchor slots in a lateral face of at least one transverse rib. In another aspect, the method comprises forming an accessory rail, wherein said accessory rail satisfies reduced dimensional error tolerances for said recesses, said transverse ribs, or said lateral faces. In another aspect, two or more adjacent recesses are simultaneously formed in a plurality of rail accessory protrusions, or wherein said two or more recesses are formed in one accessory rail protrusion during a rotational period. In another aspect, the method comprises forming a top accessory rail; forming at least one side accessory rail; and forming a bottom accessory rail, said accessory rails comprising military-standard-1913 rails. In another aspect, said modifying at least one surface of said at least one rail accessory protrusion comprises forming longitudinally extending side grooves at opposing sides of said at least one rail accessory protrusion, said side grooves to determine external reference surfaces for mounting accessories; and forming a radial reference surface extending between opposing external reference surfaces; forming a longitudinally extending central groove at said radial referencing surface, said central groove to determine internal reference surfaces for mounting the accessories. In another aspect, the method comprises forming an accessory rail from said at least one rail accessory protrusion; and mounting said accessory rail to a firearm.
In one embodiment, a method of forming an accessory rail system for a firearm can include forming a rail body extending between a first longitudinal end and a second longitudinal end; forming a plurality of slots spaced at a first surface of the rail body; and forming a curved lower surface of each slot.
In one aspect of a method, said curved lower surface is a convex surface extending laterally across said rail body. In another aspect, the method comprises forming a tubular rail system unit including at least one longitudinal rail body; rotating said tubular rail system unit about a central longitudinal axis; and removing material from said at least one rotating rail body using a stationary material removing device during said rotating.
In one embodiment, a rail system assembly for a firearm including a barrel can include a mounting body to couple over a portion of a barrel in a spaced relationship thereto; at least one accessory rail at a predetermined position of the mounting body, said at least one accessory rail including a plurality of ribs spaced by opposing lateral surfaces; and a curved lower surface between at least one pair of adjacent ribs.
In one aspect of a rail system assembly, the curved lower surface is a prescribed radial distance from a central longitudinal axis of the mounting body.
While the present invention has been described with reference to a number of specific embodiments, it will be understood that the true spirit and scope of the invention should be determined only with respect to claims that can be supported by the present specification. Further, while in numerous cases herein wherein systems and apparatuses and methods are described as having a certain number of elements it will be understood that such systems, apparatuses and methods can be practiced with fewer than the mentioned certain number of elements. Also, while a number of particular embodiments have been set forth, it will be understood that features and aspects that have been described with reference to each particular embodiment can be used with each remaining particularly set forth embodiment.
