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WO2010030367A1 - Chariot à bras utilitaire - Google Patents

Chariot à bras utilitaire Download PDF

Info

Publication number
WO2010030367A1
WO2010030367A1 PCT/US2009/005093 US2009005093W WO2010030367A1 WO 2010030367 A1 WO2010030367 A1 WO 2010030367A1 US 2009005093 W US2009005093 W US 2009005093W WO 2010030367 A1 WO2010030367 A1 WO 2010030367A1
Authority
WO
WIPO (PCT)
Prior art keywords
hand truck
wheels
pair
load platform
utility hand
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.)
Ceased
Application number
PCT/US2009/005093
Other languages
English (en)
Inventor
Don Smith
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2010030367A1 publication Critical patent/WO2010030367A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B1/00—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor
    • B62B1/10—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels
    • B62B1/12—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels involving parts being adjustable, collapsible, attachable, detachable, or convertible
    • B62B1/125—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels involving parts being adjustable, collapsible, attachable, detachable, or convertible by means of telescoping elements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B85/00—Furniture convertible into other kinds of furniture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2202/00—Indexing codes relating to type or characteristics of transported articles
    • B62B2202/40—Sport articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/12—Collapsible wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/30—Detachable, retractable or collapsible load supporting means
    • B62B2205/32—Shelves
    • B62B2205/33—Shelves stowed in a vertical position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/08—Wheel arrangements; Steering; Stability; Wheel suspension comprising additional wheels to increase stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/06—Hand moving equipment, e.g. handle bars
    • B62B5/067—Stowable or retractable handle bars

Definitions

  • the present invention generally relates to devices for transporting equipment for sports, music, tools and other heavy and/or unwieldy objects, such as hand trucks, hand carts, dollies, etc. For example, transporting scuba equipment, divers' bags, projector cases, computers, etc.
  • the present invention relates to a wheeled hand truck which is capable of carrying objects on both the front side and the back side which is capable of balancing the loads to minimize the weight supported by the user and to facilitate manipulating the hand truck from a standing position to a transport position.
  • the present invention relates to hand trucks which are easily collapsible such that it might be stored in small spaces, such as within a duffel bag, suit case, or overhead compartment of an airplane.
  • Hand trucks also tend to be bulky and not easily stored or transported. Those which do collapse tend to be limited to light service and not capable of transporting heavier loads.
  • the disclosed hand truck generally comprises a frame comprising a pair of side members and a handle member. While the device may be constructed from various materials, the inventor herein has found that the combination of stainless steel, aluminum, and glass filled nylon plastic provides a light weight hand truck which has sufficient strength to carry loads of up to 300 pounds.
  • the handle member extends between the side members.
  • the handle may be flat or ergonomically shaped to enhance comfort and gripping surface.
  • An upper pair of pi vo tally attached wheel assemblies are attached to the frame, and a lower pair of pivotally attached wheel assemblies are attached to the frame beneath the upper pair.
  • the respective pairs of wheels within the upper and lower wheel assemblies are sized such the upper pair of wheels has a larger diameter than the lower pair of wheels such that both pairs of wheels are engaging the ground surface when the load is raised off of the ground and ready to be transported.
  • This configuration allows the load to be supported by the upper pair of wheels during transportation, rather than supported by the user supporting the load by holding the handle.
  • the addition of the upper pair of wheels allows the majority of the weight of the load to be carried by the hand truck itself, thus removing stress from the lower back of the user and reducing the risk of back injury.
  • An additional set of wheels may optionally be disposed between the lower wheels for use on soft or incompetent ground surfaces such as sand, gravel, mud, snow, etc.
  • a plurality of load platforms are pivotally attached to the frame, comprising a front load platform and a rear load platform.
  • the load platforms are pivotal between a deployed position defined by the load platforms being positioned substantially perpendicular to the longitudinal axis of the frame and a stored position defined by the load platforms being positioned substantially parallel to the longitudinal axis of the frame. Raising of the front load platform causes the lower pair of wheels to rotate inwardly from a position extending backwardly from the frame of the hand truck to a position in which the lower pair of wheels is folded into and nested with the frame of the hand truck, thereby substantially reducing the width of the hand truck.
  • Figure 1 shows a front perspective view of an embodiment of the disclosed hand truck.
  • Figure 2 shows a side view of an embodiment of the disclosed hand truck.
  • Figure 3 shows a rear perspective view of an embodiment of the hand truck.
  • Figure 4 shows a perspective view of an embodiment of the hand truck collapsed for storage.
  • Figure 5 shows a side view of an embodiment of the disclosed hand truck, showing the width of the device in the collapsed position.
  • Figure 6 shows a front view of an embodiment of the hand truck in the collapsed position
  • Figure 7 shows an exploded view of an embodiment of the hand truck
  • Figures 8 and 8A show the upper cross-brace member, and an exploded view of the upper cross-brace member.
  • Figure 9 shows an exploded view of a locking device which may be utilized to lock the upper and lower wheels in position.
  • Figure 10 shows an exploded view of one of the upper wheel assemblies.
  • Figure 1 1 shows an exploded view of one of the lower wheel assemblies.
  • Figures 12, 12A and 12B shows a front perspective view of an embodiment of the hand truck, showing a gear configuration which may be utilized for actuating the different pairs of wheels into the stored positions by respective manipulation of the front load platform and the rear load platform.
  • Figure 13 shows a close up view of an embodiment of the front load platform.
  • Figure 14 shows a close up view of an embodiment of the rear load platform.
  • Figure 15 shows a close up view of an embodiment of optional sand wheels which may be disposed between the lower pair of wheels, where the sand wheels facilitate transport of the hand truck across sand, mud and other difficult terrain.
  • Figure 16 shows an embodiment of the hand truck which comprises an optional table member.
  • Figures 17-19 show a detailed view of an embodiment of the front load platform, showing how bevel gears may be disposed on the front load platform to engage bevel gears mounted to the wheel support members, indicating how raising the front load platform causes the wheel support members and wheels to rotate into the stored position.
  • FIG. 1 shows a rear perspective view of an embodiment of the hand truck 10, which generally comprises frame 12 having side members 14, 16, which define a plane which extends perpendicular to the Hand truck 10 further comprises a handle assembly 18. Also shown are the pair of pivotally attached upper wheel assemblies 20, 22, and the pivotally attached lower wheel assemblies, 24, 26.
  • a front load platform 28 is pivotally attached to the front of the frame 12. Front load platform 28 is pivotable from a first position generally perpendicular to the plane defined by side members 14, 16, as shown in various figures, including Figures 1 through 3.
  • Rear load platform 30 is pivotally attached to the back of the frame 12. In Figures 1 through 3, the front load platform 28 and the rear load platform 30 are in the operational position, ready for use.
  • the presently disclosed hand truck because of its configuration having a front load platform 28 and rear load platform 30, may be loaded such that the load on the front load platform and the rear load platform tend impose opposing moments which may the hand truck easier for the user to handle.
  • a load disposed on front load platform 28 would impose a counter-clockwise moment on the hand truck
  • a load disposed on rear load platform 30 would impose a clockwise moment, such that the two moments would tend to cancel each other, thus reducing the load at handle member 19.
  • the amount of effort required by the user to maintain the hand truck in position for transporting the loads is reduced.
  • the addition of the upper pair of wheel assemblies 20, 22 largely support the load once the hand truck has been pivoted from a vertical position to 35 to 40 degrees from the horizontal, at which point the wheels 21, 23 of the upper pair of wheel assemblies engage the ground surface.
  • the diameter of the upper wheels 21, 23 and the diameter of the lower wheels 25, 27, are sized such that when the frame 12 approaches a particular angle with the ground surface, such as between 35-40 degrees, both the upper wheels and the lower wheels are placed in engaging contact with the ground surface.
  • the inventor herein has found that utilizing lower wheels 25, 27 having an outside diameter of 3.5 inches and upper wheels 21, 23 having an outside diameter of 6 inches allows both the lower wheels and the upper wheels to have ground engaging contact when the plane defined by the side members 14, 16 is at an angle of approximately 37 degrees from a horizontal ground service.
  • Upper wheel assemblies 20, 22 respectfully comprise upper wheels, 21, 23, which are respectively mounted within upper wheel support members 32, 34, and rotate upon by axles 36, 38.
  • Polyurethane is an acceptable material for both the upper wheels 21, 23 and the lower wheels 25, 27.
  • the axles 36, 38 are generally parallel to the plane defined by side members 14, 16.
  • Lower wheel assemblies 24, 26 respectfully comprise lower wheels 25, 27, which are respectively mounted within lower wheel support members 52, 54 and rotate upon axles 56, 58.
  • Figure 3 shows a rear view of an embodiment of the hand truck, and shows the pair of side members 14, 16, and handle member 19.
  • an embodiment of the hand truck may comprise an upper cross brace 40 and a lower cross brace 44, each which may comprise scallops 42.
  • the upper cross brace 40 and the lower cross brace 44 support the handle support tubes 46, 48 which terminate in handle 19.
  • the handle support tubes 46, 48 may comprise telescoping tubes which allow the handle assembly 18 to collapse toward the cross brace 40 for reducing the size of the hand truck 10 in the storage position.
  • the upper cross brace 40 and the lower cross brace 44 may also provide support for various cargo transported on the hand truck.
  • FIG. 4 shows a front view of an embodiment of the hand truck in the storage position.
  • the front load platform 28 and the rear platform 30 are both raised such that they each parallel to the plane defined by side members 14, 16.
  • the lower pair of wheel assemblies 24, 26 are folded and nested into the frame 12, such that the orientation of axles 56, 58 changes being generally parallel to the plane defined by side members 14, 16 to being perpendicular to the plane.
  • Handle assembly 18 may include telescoping handle support tubes 46, 48 which allow the handle assembly to collapse resulting in greater compaction of the device.
  • Figure 5 shows a side view of an embodiment 10 of the hand truck shown in the storage position.
  • Figure 5 illustrates how the size of the hand truck may be substantially reduced when placed in the storage position.
  • the width of the hand truck may be reduced to dimension W, which may be less than three inches for some embodiments of the hand truck.
  • This reduced thickness is achieved by pivoting the pair of upper wheel assemblies 20, 22 and the pair of lower wheel assemblies 24, 26 inwardly, such that upper pair of wheel assemblies are generally flush with the members of frame 12.
  • the lower pair of wheel assemblies 24, 26 fold into and nest within the members of frame 12 and are generally flush with the members of frame 12.
  • Figure 6 shows a front view of an embodiment of the hand truck in the storage position, with the upper pair of pivotally attached wheel assemblies 20,22 and the lower pair of pivotally attached wheel assemblies 24, 26 each nested within the members of frame 12.
  • Figure 6 shows how the overall height may be reduced by telescoping the handle assembly 18.
  • FIG 7 shows an exploded view of an embodiment of the hand truck 10.
  • handle assembly 18 may include telescoping handle support tubes 46, 48 which allow the handle assembly to collapse resulting in greater compaction of the device.
  • the inside tubes 49, 51 may comprise apertures 53 into which latch members 55, 57, may be set.
  • latch members 55, 57 may be set within upper cross brace 40.
  • a release button 59 disposed within upper cross brace 40 to release the latch members 55,57 from the apertures 53 to allow the collapsing of the handle assembly 18.
  • an embodiment of the hand truck 10 may comprise locking mechanisms 60, 62 which may be utilized to lock the upper wheel assemblies 20,22 and the lower wheel assemblies 24, 26 from rotating.
  • a detailed view of the locking mechanisms 60, 62 is shown in Figure 9.
  • the locking mechanism 60, 62 comprise a sleeve 64 which, as the sleeve is rotated, urges upper pin 66 upward into engagement apertures (not shown) in the upper wheel support members 32, 34.
  • sleeve 64 is rotated, it also urges lower pin 68 downwardly into engagement apertures 70 in the lower wheel support members 52, 54.
  • Figure 10 shows a detailed view of upper wheel assembly 22 which may be utilized with the present invention.
  • Upper wheel assembly 22 comprises wheel 23, upper wheel support member 32, and axle 36. Also shown is semi-circular gear 72, upper bushing 74, and lower bushing 76. Axle 36 is retained by lock ring 37.
  • the upper wheel assembly 20 utilized on the opposite side of the hand truck is identical to upper wheel assembly 22, except the orientation of the semi-circular gear 70 is reversed to allow for rotation of the wheel assembly in the opposite direction.
  • the mechanisms utilized for rotating the upper wheel assemblies 20, 22 are shown in Figures 12 and 12A
  • Figure 11 shows a detailed view of lower wheel assembly 24 which may be utilized with the present invention.
  • Lower wheel assembly 24 comprises wheel 25, lower wheel support member 52, and axle 56. Also shown is semi-circular gear 78, upper bushing 80 and lower bushing 82.
  • Axle 56 is retained by lock ring 61.
  • the lower wheel assembly 26 utilized on the opposite side of the hand truck is identical to lower wheel assembly 24, except the orientation of the semi-circular gear 78 is reversed to allow for rotation of the wheel assembly in the opposite direction.
  • the mechanisms utilized for rotating the lower wheel assemblies 24, 26 are shown in Figures 12 and 12B.
  • FIG 13 shows an embodiment of a rear load platform 30 which may be utilized with the present invention.
  • the rear load platform 30 may comprises a pair of opposite facing semi-circular gears 83, 84.
  • the semi-circular gears 83, 84 engage the teeth of semi-circular gears 72 of the upper wheel assemblies 20, 22 when the rear load platform is raised or lowered to move the upper wheel assemblies back and forth from the operational and storage positions.
  • the rear load platform 30 may comprise various cut-outs, lips, etc. which may be utilized for various types of cargo.
  • rear load platform may comprise contoured indentions for securing the bottom of scuba tanks.
  • FIG 14 shows an embodiment of a front load platform 28 which may be utilized with the present invention.
  • the front load platform 28 may comprises a pair of opposite facing semi-circular gears 86, 88.
  • the semi-circular gears 86, 88 engage the teeth of semi-circular gears 78 of the lower wheel assemblies 24, 26 when the front load platform is raised or lowered thus moving the lower wheel assemblies back and forth from the operational and storage positions.
  • the front load platform 28 may comprise various cut-outs, lips, etc. which may be utilized for various types of cargo.
  • Figure 15 shows an optional wheel assembly 90 which may be utilized with embodiments of the disclosed hand truck.
  • the optional wheel assembly 90 may be disposed between the lower pair of wheel assemblies, by attaching mounting brackets 92 to frame 12.
  • the relatively large diameter wheels 94 facilitate use of the hand truck on sand, mud and other difficult terrain.
  • Large diameter wheels 94 are mounted to axle 96.
  • FIG 16 shows an alternative embodiment of the hand truck 10'.
  • This embodiment comprises a table member 98 which may be attached to the upper cross brace 40' or other structure of the hand truck 10'.
  • the table member 98 may comprise one or more leg members 100 which may be pivotally attached to the bottom of the table member.
  • Support 102 may be utilized to provide additional stability to the table member 98.
  • Figures 17 through 19 show an alternative gear arrangement which may be utilized as opposed to the semi-circular gears discussed above.
  • Figures 17 through 19 show the use of bevel gears 104 for manipulating the lower wheel assemblies 24', 26' by the raising and lowering of front load platform 28'.
  • the arrows indicate the direction the side members are turned to drive the gears.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

L’invention concerne un chariot à bras présentant une plate-forme de chargement avant, une plate-forme de chargement arrière, ainsi qu’une paire d’ensembles roues inférieures et une paire d’ensembles roues supérieures. Les plates-formes de chargement et les ensembles roues se plient et s’emboîtent dans le cadre du chariot à bras, dans une position de rangement dont l’épaisseur est approximativement identique à celle des rails latéraux du chariot à bras. L’élévation et l’abaissement de la plate-forme de chargement avant entraînent le déplacement alterné des ensembles roues inférieures entre la position opérationnelle et la position de rangement. De même, l’élévation et l’abaissement de la plate-forme de chargement arrière entraînent le déplacement alterné des ensembles roues supérieures entre la position opérationnelle et la position de rangement.
PCT/US2009/005093 2008-09-11 2009-09-11 Chariot à bras utilitaire Ceased WO2010030367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US19195808P 2008-09-11 2008-09-11
US61/191,958 2008-09-11

Publications (1)

Publication Number Publication Date
WO2010030367A1 true WO2010030367A1 (fr) 2010-03-18

Family

ID=42005396

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/005093 Ceased WO2010030367A1 (fr) 2008-09-11 2009-09-11 Chariot à bras utilitaire

Country Status (1)

Country Link
WO (1) WO2010030367A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015089813A (ja) * 2013-11-05 2015-05-11 宜▲玄▼企業有限公司 台車
WO2015178983A1 (fr) * 2014-05-23 2015-11-26 Illinois Tool Works Inc. Système d'organe de roulement pour alimentateur de fil portable
JP5993495B1 (ja) * 2015-06-08 2016-09-14 豫▲員▼企業有限公司 台車の折り畳み装置
JP2017100543A (ja) * 2015-12-01 2017-06-08 執和 岸田 台車

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284286A (en) * 1979-08-02 1981-08-18 Lewallen Charles D Combination handtruck and portable work table
US4858940A (en) * 1988-04-28 1989-08-22 Cheng Chiun J Stairway accessible carry cart with foldaway wheels
US4887837A (en) * 1987-06-04 1989-12-19 Al-Mar Precision Co. Carrier for use on beaches, etc.
US5931483A (en) * 1998-02-09 1999-08-03 Haynes; David Lee Bowling caddy
US7044484B2 (en) * 2004-06-23 2006-05-16 Wen-Fa Wang Folding anchor structure for foldable hand trucks
US7258352B2 (en) * 2004-12-30 2007-08-21 Stacey Anne Odgers Shopping cart having slotted rack for securing objects

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284286A (en) * 1979-08-02 1981-08-18 Lewallen Charles D Combination handtruck and portable work table
US4887837A (en) * 1987-06-04 1989-12-19 Al-Mar Precision Co. Carrier for use on beaches, etc.
US4858940A (en) * 1988-04-28 1989-08-22 Cheng Chiun J Stairway accessible carry cart with foldaway wheels
US5931483A (en) * 1998-02-09 1999-08-03 Haynes; David Lee Bowling caddy
US7044484B2 (en) * 2004-06-23 2006-05-16 Wen-Fa Wang Folding anchor structure for foldable hand trucks
US7258352B2 (en) * 2004-12-30 2007-08-21 Stacey Anne Odgers Shopping cart having slotted rack for securing objects

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015089813A (ja) * 2013-11-05 2015-05-11 宜▲玄▼企業有限公司 台車
WO2015178983A1 (fr) * 2014-05-23 2015-11-26 Illinois Tool Works Inc. Système d'organe de roulement pour alimentateur de fil portable
CN106536116A (zh) * 2014-05-23 2017-03-22 伊利诺斯工具制品有限公司 用于便携式送丝器的行动装置系统
JP5993495B1 (ja) * 2015-06-08 2016-09-14 豫▲員▼企業有限公司 台車の折り畳み装置
JP2017100543A (ja) * 2015-12-01 2017-06-08 執和 岸田 台車

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