TUBE BARRIER
A powered unit for performing blower operations or vacuuming operations is provided. The powered unit includes a blower tube, a barrier for preventing unintentional contact with moving parts in the powered unit, and a retention feature. The retention feature is located within the blower tube and the retention feature is configured for securing the barrier within the blower tube. The retention feature is included of an annular groove in the blower tube. The barrier is secured in the blower tube by a snap engagement with the retention feature. The barrier can also be deformed as it is inserted into the blower tube. The barrier then returns to its non-deformed shape when the barrier is secured in the retention feature in the blower tube.
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The present invention relates generally to a powered unit for blowing or vacuuming operations, and more particularly, to a barrier that is placed in a tube portion of the powered unit to help block contact of an exterior object with the moving parts in the powered unit.
BACKGROUND OF THE INVENTIONCurrent European safety standards require a protective barrier to prevent unintentional contact with moving parts in a handheld blower. A protective barrier should be easily installed on units that must meet these safety standards, but the installation features should be unobtrusive on units that do not require the barrier. It is desirable to have a barrier that is easily installed, but difficult to remove. The barrier should also have minimal impact on airflow through the blower.
BRIEF SUMMARY OF THE INVENTIONThe 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 unit for performing blower operations or vacuuming operations is provided. The powered unit includes a blower tube, a barrier, and a retention feature. The retention feature is located within the blower tube and the retention feature is configured for securing the barrier within the blower tube. The retention feature includes an annular groove in the blower tube. The barrier is secured in the blower tube by a snap engagement with the retention feature.
In accordance with another aspect of the present invention, a powered unit for performing blower operations or vacuuming operations is provided. The powered unit includes a blower tube, a barrier, and a retention feature. The retention feature is located within the blower tube and the retention feature is configured for securing the barrier within the blower tube. The barrier is secured in the blower tube by a snap engagement with the retention feature and the barrier is deformed as it is inserted into the blower tube. The barrier then returns to its non-deformed shape when the barrier is secured in the retention feature in the blower tube.
In accordance with another aspect of the present invention, a method of assembling a powered unit for performing blower operations or vacuuming operations is provided. The barrier is pushed into the interior of a blower tube. The barrier is deformed as it enters the interior of the blower tube and is pushed further into the blower tube. The barrier is secured within the blower tube in a secured position by allowing the barrier to return to its non-deformed shape as the barrier snaps into engagement with a retention feature located in the interior of the blower tube.
The foregoing and other 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:
An example embodiment that incorporates one or more aspects of the present invention is described and illustrated in the drawings. The illustrated example is not intended to be a limitation on 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
An example barrier 16 is shown in
The example barrier 16 includes an outer ring 50 of material and at least one spar 52 that protrudes from a point on the outer ring 50 to a central hub 54 located at the center of the barrier 16. In other examples, a plurality of spars 52 can be provided but the spars 52 do not intersect. Also in other examples, the spars 52 can have one end on a point on the perimeter of the outer ring 50 and the spars 52 can protrude to any other location, such as another point on the barrier 16, another point within the barrier, or a spar 52 that protrudes away from the outer ring 50 in various orientations. In additional examples, some of the spars 52 may extend only a partial distance (e.g., extending only a partial distance between the perimeter and the central hub). The spars 52 can also include straight and/or curved shapes.
In another example, shown in
In the shown example, the barrier 16 is deformed as it is inserted into the blower tube 12 because the blower tube 12 has a relatively smaller dimension than the barrier 16. A substantial portion of the barrier 16 can be deformed as it is inserted into the blower tube 12. In one example, the outer ring 50 is deformed inward toward the central hub 54. In one specific example, portions of the outer ring 50 are folded, possibly at fold lines on the outer ring. Also, the spars 52 may be deformed to reduce their radial extent. By having the majority of the barrier 16 be deformable, this can improve the engagement between the retention feature 18 and the barrier 16. In this example, the barrier 16 returns to its original or non-deformed shape when the barrier 16 is secured in the retention feature 18 in the blower tube 12. In this example, as the barrier 16 moves from a deformed state to a non-deformed state, the barrier 16 snaps into engagement with the retention feature 18 and is secured in the retention feature 18 in the blower tube 12. In another example, the barrier 16 can remain non-deformed until it reaches the retention feature 18, where the barrier 16 becomes deformed when it snaps into engagement with the retention feature 18. In this example, the blower tube 12 has an inner diameter that is generally equivalent to the diameter of the barrier 16.
Another way to consider the structure is that the powered unit 10 is provided with a blower tube 12 and a barrier 16. A retention feature 18 located within the blower tube 12 is configured for securing the barrier 16 within the blower tube 12. Other types of retention features 18 can provide the same snap-in process as previously discussed. For example, a retention feature 18 that engages a corresponding structure on the barrier 16 can provide engagement between the retention feature 18 and the structure on the barrier 16. In an example, the barrier 16 is deformed as it is inserted into the blower tube 12 because the blower tube 12 can have a relatively smaller dimension than the barrier 16. The barrier 16 can return to its original or non-deformed shape when the barrier 16 is secured in the retention feature 18 in the blower tube 12. In this example, as the barrier 16 moves from a deformed state to a non-deformed state, the barrier 16 snaps into engagement with the retention feature 18 and is secured in the retention feature 18 in the blower tube 12. A substantial portion of the barrier 16 can be deformed as it is inserted into the blower tube 12. By having the majority of the barrier 16 be deformable, this can improve the engagement between the retention feature 18 and the barrier 16.
The retention feature 18 in the second example can also have an exterior appearance of a cosmetic protrusion 22, where the cosmetic protrusion 22 can appear to be part of the blower tube 12 construction. Without a user viewing the interior 14 of the blower tube 12, the user would not appreciate that the cosmetic protrusion 22 has a functional purpose. In this example, the retention feature 18 can include an annular groove 20 that has a diameter that is relatively larger than the inner diameter of the blower tube 12. The annular groove 20 allows the barrier 16 to be placed in the secured position 30 regardless of the orientation of the barrier 16 as it is inserted into the blower tube 12. If the blower tube 12 includes a non-circular shape, the dimension of the annular groove 20 can be relatively larger than the dimension of the blower tube 12.
An example method for assembling can be seen in
The example of
The example barrier 16 in any of the embodiments can be easily installed and secured in the blower tube 12 but is difficult to remove. The engagement between the barrier 16 and the retention feature 18 can increase the difficulty of a user simply removing the barrier 16. The structure of the retention feature 18 prevents the user from accidentally dislodging the barrier 16 from engagement with the retention feature 18.
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.
Claims
1. A powered unit for performing blower operations or vacuuming operations including:
- a blower tube;
- a barrier;
- a retention feature located within the blower tube configured for securing the barrier within the blower tube;
- the retention feature is included in an annular groove in the blower tube; and
- the barrier is secured in the blower tube by a snap engagement with the retention feature.
2. A powered unit for performing blower operations or vacuuming operations according to claim 1, wherein the retention feature has an exterior appearance of a cosmetic annular protrusion.
3. A powered unit for performing blower operations or vacuuming operations according to claim 1, wherein the barrier is difficult to remove.
4. A powered unit for performing blower operations or vacuuming operations according to claim 1, wherein the barrier includes a unitary body of a circular shape that includes an outer ring of material and at least one spar that protrudes from the outer ring of material to a central hub located at a center of the barrier.
5. A powered unit for performing blower operations or vacuuming operations according to claim 1, wherein the barrier includes a unitary body of a circular shape that includes an outer ring of material and at least one spar that protrudes from a point on the outer ring of material.
6. A powered unit for performing blower operations or vacuuming operations according to claim 1, wherein the annular groove in the blower tube has a diameter that is relatively larger than the inner diameter of the blower tube.
7. A powered unit for performing blower operations or vacuuming operations according to claim 1, wherein the barrier is deformed as it is inserted into the blower tube and the barrier returns to its non-deformed shape when the barrier is secured in the retention feature in the blower tube.
8. A powered unit for performing blower operations or vacuuming operations including:
- a blower tube;
- a barrier;
- a retention feature located within the blower tube is configured for securing the barrier within the blower tube;
- and the barrier is secured in the blower tube by a snap engagement with the retention feature and the barrier is deformed as it is inserted into the blower tube and the barrier returns to its non-deformed shape when the barrier is secured in the retention feature in the blower tube.
9. A powered unit for performing blower operations or vacuuming operations according to claim 8, wherein the retention feature has an exterior appearance of a cosmetic annular protrusion.
10. A powered unit for performing blower operations or vacuuming operations according to claim 8, wherein the barrier is difficult to remove.
11. A powered unit for performing blower operations or vacuuming operations according to claim 8, wherein the barrier includes a unitary body of a circular shape that includes an outer ring of material and at least one spar that protrudes from the outer ring of material to a central hub located at a center of the barrier.
12. A powered unit for performing blower operations or vacuuming operations according to claim 8, wherein the barrier includes a unitary body of a circular shape that includes an outer ring of material and at least one spar that protrudes from a point on the outer ring of material.
13. A powered unit for performing blower operations or vacuuming operations according to claim 8, wherein the retention feature includes a channel formed from at least one first ramp section and at least one second ramp section.
14. A method of assembling a powered unit for performing blower operations or vacuuming operations including the steps of:
- pushing a barrier into the interior of a blower tube; wherein the barrier is deformed as it enters the interior of the blower tube and is pushed into the blower tube; and
- securing the barrier within the blower tube in a secured position by allowing the barrier to return to its non-deformed shape as the barrier snaps into engagement with a retention feature located in the interior of the blower tube.
15. A method of assembling a powered unit for performing blower operations or vacuuming operations according to claim 14, wherein a fixture is used to push the barrier into the secured position for the barrier to engage the retention feature.
16. A method of assembling a powered unit for performing blower operations or vacuuming operations according to claim 15, wherein a second fixture is used while pushing the barrier to force the barrier to engage the retention feature.
Type: Application
Filed: May 8, 2007
Publication Date: Nov 13, 2008
Applicant: HUSQVARNA OUTDOOR PRODUCTS INC. (Augusta, GA)
Inventors: Jeffery L. Osterchill (Texarkana, AR), John R. Coffey (Texarkana, TX)
Application Number: 11/745,664
International Classification: A47L 9/08 (20060101); B21D 39/00 (20060101);