EP2145114A1 - Barrière de tuyau - Google Patents

Barrière de tuyau

Info

Publication number
EP2145114A1
EP2145114A1 EP08747835A EP08747835A EP2145114A1 EP 2145114 A1 EP2145114 A1 EP 2145114A1 EP 08747835 A EP08747835 A EP 08747835A EP 08747835 A EP08747835 A EP 08747835A EP 2145114 A1 EP2145114 A1 EP 2145114A1
Authority
EP
European Patent Office
Prior art keywords
barrier
blower
blower tube
retention feature
operations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08747835A
Other languages
German (de)
English (en)
Other versions
EP2145114A4 (fr
Inventor
Jeffrey L. Osterchill
John R. Coffey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Husqvarna Consumer Outdoor Products NA Inc
Original Assignee
Husqvarna Consumer Outdoor Products NA Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Husqvarna Consumer Outdoor Products NA Inc filed Critical Husqvarna Consumer Outdoor Products NA Inc
Publication of EP2145114A1 publication Critical patent/EP2145114A1/fr
Publication of EP2145114A4 publication Critical patent/EP2145114A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming

Definitions

  • 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.
  • a powered unit for performing blower operations or vacuuming operations.
  • 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.
  • a powered unit for performing blower operations or vacuuming operations 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.
  • 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.
  • FIG. 1 is a schematic view showing generalized structure of an example vacuum/blower that incorporates the present invention
  • FIG. 2 is a perspective view of an example barrier and an example tube fragment that provide one example embodiment of the present invention
  • FIG. 3 is a perspective view of the barrier and the tube of FIG. 2, with the barrier inserted into the tube;
  • FIG. 5 is a sectioned, perspective view of the barrier inserted into the tube, with the barrier inserted into the tube;
  • FIG. 7 is a side view of an example barrier and the tube with the barrier in a secured position in a blower tube;
  • FIG. 8 is a perspective view of another example tube fragment.
  • FIG. 1 represents only one example type of a powered blower/vacuum unit 10.
  • the powered unit 10 includes a tube 12.
  • the tube 12 provides the means for air to be vacuumed toward or blown from an air generating portion of the powered unit 10 along the tube.
  • the tube 12 can have various dimensions, be made of a variety of materials, and have different structural features.
  • the tube 12 is a blower tube.
  • the example blower tube 12 has a circular cross-sectional shape as shown in FIGS. 2-5, though other cross- sectional shapes may be used.
  • FIG. 2 An example barrier 16 is shown in FIG. 2.
  • the barrier 16 is provided to prevent unintentional contact by a user with the moving parts in the handheld powered unit 10.
  • This example barrier 16 includes a unitary body with a circular shape. Other shapes may be used. Shapes can also be selected to correspond to the shape of the blower tube 12.
  • FIG. 2 also shows a retention feature 18 located within the blower tube 12.
  • the retention feature 18 is configured for securing the barrier 16 within the blower tube 12.
  • the retention feature 18 includes an annular groove 20 in the blower tube 12.
  • the annular groove 20 allows the barrier 16 to be placed in a secured position 30, as seen in FIG. 4 and FIG. 5, regardless of the orientation of the barrier 16 as it is inserted into the blower tube 12.
  • the annular groove 20 in the blower tube 12 has a diameter that is relatively larger than the inner diameter of the blower tube 12. If the blower tube 12 includes a non-circular shape, the dimension of the annular groove 20 can still have a relatively larger dimension than the dimension of the blower tube 12.
  • the barrier 16 can be secured in the blower tube 12 by the barrier 16 snapping into engagement with the annular groove 20.
  • the barrier 16 engages the annular groove 20 because the barrier 16 has an axial length (as measured along the major axis of the tube) 12 that is relatively smaller than the axial length 26 of the annular groove 20 (See FIGS. 6-7).
  • the retention feature 18 has an exterior appearance of a cosmetic annular protrusion 22, as also seen in FIG. 1 and FIG. 3.
  • 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.
  • first ramp section 60 and the second ramp section 62 needs to have a sloped segment and that the other portion does not need to include a sloped segment to form the retention feature 18.
  • a first ramp section 60 can be provided with a second ramp section 62 where the second ramp section 62 does not have any sloped segments.
  • the second ramp section 62 protrudes from the tube 12 and a channel 64 is formed between the first ramp section 60 and the second ramp section 62 to retain the barrier 16.
  • multiple sets of first ramp sections 60 and second ramp sections 62 can be used to form the channel 64.
  • the sets of first ramp sections 60 and second ramp sections 62 can be evenly spaced around the tube 12 or can be located at various points around the tube 12.
  • each ramp section 60, 62 can have a ramp length and ramp width of various dimensions.
  • the first ramp section 60 can also have a different ramp length and ramp width than the second ramp section 62.
  • a barrier 16 can be placed in the interior 14 of the tube 12. The barrier 16 then slides over the second ramp section 62 and the barrier 16 then expands to its original shape upon reaching the retention feature 18 that includes the channel 64. In other examples, the barrier 16 slides over the first ramp section 60, as opposed to the second ramp section 62.
  • the barrier 16 snaps into engagement with the retention feature 18 and is secured in the retention feature 18 in the blower tube 12.
  • 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.
  • the blower tube 12 has an inner diameter that is generally equivalent to the diameter of the barrier 16.
  • 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.
  • 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.
  • FIGS. 2- An example method for assembling can be seen in FIGS. 2-
  • FIG. 2 shows the barrier 16 before it is inserted into the blower tube 12.
  • FIGS. 3-5 show the barrier 16 in the secured position 30 engaging a retention feature 18.
  • the barrier 16 is inserted into the interior 14 of a blower tube 12.
  • the barrier 16 is then pushed into the interior of the blower tube 12.
  • the barrier 16 can be deformed and/or have a reduction in size while being initially pushed into the interior of the blower tube 12.
  • the barrier 16 is then moved along the tube 12 toward a final position, where the barrier 16 is secured within the blower tube 12 in the secured position 30 by allowing the barrier 16 to return to its original or non-deformed shape.
  • the barrier 16 can return to its non- deformed shape, as seen in FIGS.
  • the secured position 30 for the barrier 16 is reached when the barrier 16 snaps into engagement with the retention feature 18.
  • retention features 18 can be provided which will still result in the barrier 16 returning to its original, non-deformed shape.
  • the retention feature 18 can be an annular groove that has a relatively larger dimension than the dimension of the blower tube 12.
  • FIGS. 6-7 also shows a fixture 40 (shown in section) that is used to push the barrier 16 into the secured position 30.
  • FIG. 6 shows the barrier 16 after it is inserted into the blower tube 12.
  • FIG. 7 shows the barrier 16 after it is pushed into a secured position 30 in the blower tube.
  • the fixture 40 can be a blunt object that can have a solid contacting surface 44 for pushing the barrier 16. The contacting surface 44 of the fixture 40 engages the barrier 16 and pushes the barrier 16 until it reaches the secured position 30.
  • a second fixture 42 (shown in section) can be provided on the opposite side of the retention feature 18 in case the barrier 16 is pushed too far into the blower tube 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne une unité alimentée pour effectuer des opérations de soufflage ou des opérations d'aspiration. L'unité alimentée inclut un tuyau souffleur, une barrière pour prévenir le contact involontaire avec des pièces en mouvement dans l'unité alimentée et un dispositif de rétention. Le dispositif de rétention est situé à l'intérieur du tuyau souffleur et ce même dispositif de rétention est configuré pour fixer la barrière à l'intérieur du tuyau souffleur. Le dispositif de rétention comprend une rainure annulaire dans le tuyau souffleur. La barrière est fixée dans le tuyau souffleur par une mise en prise encliquetable avec le dispositif de rétention. La barrière peut également se déformer tandis qu'elle est insérée dans le tuyau souffleur. La barrière revient ensuite à sa forme non déformée lorsqu'elle est fixée dans le dispositif de rétention dans le tuyau souffleur.
EP08747835.0A 2007-05-08 2008-05-08 Barrière de tuyau Withdrawn EP2145114A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/745,664 US20080276416A1 (en) 2007-05-08 2007-05-08 Tube barrier
PCT/US2008/063004 WO2008137972A1 (fr) 2007-05-08 2008-05-08 Barrière de tuyau

Publications (2)

Publication Number Publication Date
EP2145114A1 true EP2145114A1 (fr) 2010-01-20
EP2145114A4 EP2145114A4 (fr) 2017-07-12

Family

ID=39944031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08747835.0A Withdrawn EP2145114A4 (fr) 2007-05-08 2008-05-08 Barrière de tuyau

Country Status (3)

Country Link
US (1) US20080276416A1 (fr)
EP (1) EP2145114A4 (fr)
WO (1) WO2008137972A1 (fr)

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Also Published As

Publication number Publication date
US20080276416A1 (en) 2008-11-13
WO2008137972A1 (fr) 2008-11-13
EP2145114A4 (fr) 2017-07-12

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