The present invention relates generally to a blower or vacuum unit, for performing a blowing or vacuuming operation, and more particularly, to a tube configured for at least air flow that includes an accordion relief structure.
Existing blower designs use a single-piece blow molded tube with a bayonet-style attachment configuration info injection molded housings. Specifically, the designs include a twist-lock or bayonet-style retaining features. These types of designs require excessive assembly engagement to ensure a robust assembly and they do not facilitate a low profile housing when the tube is not installed. One solution can generally include a coupler that is retained in the tube in a positive manner to prevent accidental disassembly or breakage. However current designs for supporting the coupler could result in the coupler being pushed too far into the tube if greater forces are applied.
The following presents a simplified summary of the invention in order to provide a basic understanding of some example aspects of the invention. This summary is not an extensive overview of the invention. Moreover, this summary is not intended to identify critical elements of the invention nor delineate the scope of the invention. The sole purpose of the summary is to present some concepts of the invention in simplified form as a prelude to the more detailed description that is presented later.
In accordance with one aspect of the present invention, a powered blower/vacuum unit is provided for performing a blowing/vacuuming operation. The powered unit includes a base portion having a housing and a power air-moving device disposed therein for creating an air stream, and a generally rigid, elongate tube extending a relatively large distance away from the housing and adapted to permit at least the air stream to flow through the tube along the relatively large distance. The tube further includes a fluid inlet disposed at a first end of the tube, a fluid outlet disposed at a second end of the tube, and at least one accordion relief structure disposed generally between the first end and the second end of the tube. The accordion relief structure is adapted to act as a resilient shock absorber responsive to forces applied to the tube.
In accordance with another aspect of the present invention, a powered blower/Vacuum unit is provided for performing a blowing/vacuuming operation. The powered unit includes a base portion having a housing and a power air-moving device disposed therein for creating an air stream, and a coupler adapted to be removably attached to the housing. The powered unit further includes a generally rigid, elongate tube extending a relatively large distance away from the housing and adapted to permit at least the air stream to flow through the tube along the relatively large distance. The tube further includes a fluid inlet disposed at a first and of the tube, a fluid outlet disposed at a second end of the tube, and at least one accordion relief structure disposed generally between the first end and the second end of the tube. The accordion relief structure is adapted to act as a resilient shock absorber responsive to forces applied to the tube. The tube is non-removably attached to the coupler, and a portion of the accordion relief structure is adapted to act as a positive slop for the coupler.
In accordance with another aspect of the present invention, a powered blower/Vacuum unit is provided for performing a blowing/vacuuming operation. The powered unit includes a base portion having a housing and a power air-moving device disposed therein for creating an air stream, and a coupler adapted to be removably attached to the housing. The powered unit further includes a generally rigid, elongate vacuum tube attached to the coupler and extending a relatively large distance away from the housing and adapted to ingest debris in addition to the air stream so as to flow through the tube along the relatively large distance. The tube further includes a fluid inlet disposed at a first end of the tube, a fluid outlet disposed at a second end of the tube, and at least one accordion relief structure disposed generally between the first end and the second end of the tube. The accordion relief structure includes at least one internal rib and at least one intermediate flexible section located adjacent to each internal rib. The accordion relief structure is adapted to collapse and expand to absorb forces applied to the tube so as to inhibit inadvertent detachment of the coupler born the housing.
The foregoing and oilier aspects of the present invention will become apparent to those skilled in the art to which the present invention relates upon reading the following description with reference to the accompanying drawings, in which:
Example embodiments that incorporate one or more aspects of the present invention are described and illustrated in the drawings. These illustrated examples are not intended to be a limitation or; the present invention. For example, one or more aspects of the present invention can be utilized in other embodiments and even other types of devices. Moreover, certain terminology is used herein for convenience only and is not to be taken as a limitation on the present invention. Still further, in the drawings, the same reference numerals are employed for designating the same elements.
Turning to the shown example of
The housing 20 has the opening 22 and a structure that accommodates the power air-moving device. The air-moving device and the associated structure for accommodating the air-moving device are within the comprehension of the person of ordinary skill in the art and are not discussed in detail herein. The opening 22 in the housing 20 provides an airflow path between the powered air-moving device, the coupler 18, and the tube 14. In some embodiments, the housing 20 can be only part of the base portion 12 and the housing 20 can engage an additional housing portion (not shown). In other embodiments, the housing 20 can be the only structure that engages the power air-moving device. In the embodiment shown, the housing 20 includes one portion with a generally circular shape, though various other shapes can be used.
The tube 14 is generally rigid and elongate, and can extend a relatively large distance away from the housing 20. The tube 14 is substantially cylindrical, though other shapes can be used. As seen in
The tube 14 can be retained on the housing 20 in various manners. In one example, one end of the tube 14 can include locking structure, such as a bayonet connection, for direct engagement with corresponding structure on the housing 20. In another example, the tube 14 can be indirectly connected the housing 20 by way of an intermediate coupler 18. For example, as seen in
In the shown example, the coupler 18 is made of an injection molded material separate from the tube 14 and the coupler 18 is formed by a second manufacturing operation, such as an injection molding operation. As another example, the coupler 18 may be stronger and/or thicker as compared to a blow molded tube of the prior art designs. The coupler 18 can be formed by a second, different manufacturing operation. The second manufacturing operation, in one embodiment, can be an injection molding process and include heating a material. As yet another example, the coupler 18 can have a rigidity that is greater than the rigidity of the tube 14.
In a second embodiment shown in
The coupler 18 can be non-removably attached to the tube 14. In one example of this non-removable attachment, the coupler 18 has a plurality of one-way snap-in features 30 located on an exterior surface 36 of the coupler 18, as seen in
In the example shown in
In other embodiments, other structures can be used that are configured for non-removably attaching the tube 14 to the coupler 18. For example, the tube 14 can be attached to the coupler 18 by the use of various fasteners or adhesives. A fastener or adhesive structure can engage the tube 14 to non-removably attach the tube 14 to the coupler 18. Alternatively, the tube 14 can also be attached to the coupler 18 by the use of a material distortion operation, such as welding or staking. The tube 14 can also be configured for non-removable attachment with the coupler by the use of various combinations of different structures, such as using snap-in features 30. In combination with other fasteners, adhesives, or material distortion operations. In yet another example, the coupler 18 can be attached to the tube 14 at a time after the respective heated molding operations (e.g., the first and second manufacturing operations), though at a time before either or both of the tube 14 and coupler 18 have cooled. Thus, the tube 14 and coupler 18 can cool together as a joined assembly to provide an increased fit and/or joining strength.
The tube 14 can include various structures to inhibit inadvertent removal of the tribe 14 from the housing 20, such as might accidentally occur during operation of the power tool, in one example, at least one accordion relief structure 80 can be provided between the first end 25 and the second end 27 of the tube 14. The accordion relief structure 60 can be configured to act as a resilient shock absorber. The accordion relief structure 60 can include at least one internal rib 62A and at least one intermediate flexible section 66 located adjacent thereto. Of course, the accordion relief structure 60 can include a plurality of internal ribs 62A, 62B, 62C that can include various intermediate flexible sections 66 therebetween. Each internal rib 62A, 62B, 62C can be a structure, such as a protrusion, that is located inside the tube 14 along an internal surface of the tube 14. In other examples, each internal rib 62A, 028, 62C can include multiple structures, such as a plurality of protrusions that are located in the same plane along an internal surface of the tube 14. Each intermediate flexible section 66 can be manufactured from various materials that are flexible, even if the material is different than the material that the tube 14 is manufactured from. Of course, as shown, the internal ribs 62A, 82B, 62C and the intermediate flexible sections 66 can have a generally annular geometry consistent with the generally cylindrical geometry of the tube 14, can be formed of the same material as the tube 14, and/or can even be formed with the tube 14 during the first manufacturing process.
The accordion relief structure 60 acts as a resilient shock absorber for the tube 14 to absorb various forces applied to the tube 14 during use. For example, the accordion relief structure 60 can absorb forces applied along the longitudinal axis of the lube 14, such as might be encountered when the first end 25 of the tube 14 strikes the ground or ether object during a vacuuming operation, in other examples, the accordion relief structure 60 can absorb forces applied along a transverse axis of the tube 14 or even venous other compound angles relative to the tube 14.
To provide shock absorption, the first internal rib 62A can be generally rigid and remain in contact with the coupler 18 while the intermediate sections 86 are flexible, as seen in
As can be appreciated, the accordion relief structure 60 can be located at various positions, such as in the middle of the tube 14 or at an end of the tribe 14. In addition or alternatively, the tube 14 can include multiple accordion relief structures 60 (e.g. one located near an end and another located near the middle of the tube 14). Further, more or less internal ribs 62A, 62B, 62C can also be included, in other embodiments, the accordion relief structure 60 can include geometry where the intermediate sections 66 have a dimension that is equal to the diameter of the tribe 14 or even geometry that is larger than the diameter of the tube 14. In other embodiments, the dimensions of the ribs 62A, 628, 62C and the intermediate sections 06 can be varied in relation to each other and the ribs 62A, 628, 62C and the intermediate sections 68 can have different dimensions throughout the length of the tube 14. Alternatively, the intermediate flexible sections 66 can also include structure that is compressible and/or expandable upon application of a force.
In the shown embodiment, the intermediate flexible sections 66 are reactive to forces applied to the tube 14. In another example embodiment, a portion of the accordion relief structure 60 can be configured to act as a positive stop to prevent the coupler 18 from being inserted fee deeply into the tube 14 when the coupler 18 is assembled onto the tube 14. For example, as shown in
The combination of the snap-in features 30 and the accordion relief structure 60 provides a system that permits relative movement of portions of the tube 14, while limiting movement of the coupler 18 relative to the tube 14. Thus, by providing the snap-in features 30 in combination with the accordion relief structure 60, the coupler 18 is prevented from movement in multiple axes to further reduce accidental disassembly or breakage from the coupler 18 being removed from the tube 14, and/or accidental removal of the coupler 18 from the housing 20.
To attach the tube 14 and coupler 18 to the housing 20, as shown in
As seen in
In the example embodiment shown, the at least one male component 44 protrudes inwards towards a center of the opening 22 and the female components 46 can protrude inwards, as best seen in
The invention has been described with reference to the example embodiments described above. Modifications and alterations will occur to others upon a reading and understanding of this specification. Example embodiments incorporating one or more aspects of the invention are intended to include all such modifications and alterations insofar as they come within the scope of the appended claims.
This application is a continuation-in-part application of application Ser. No. 11/754,599, filed May 29, 2007, the entire disclosure of which is hereby incorporated herein by reference.
Number | Date | Country | |
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Parent | 11754599 | May 2007 | US |
Child | 11765024 | US |