US3818541A - Castors - Google Patents

Castors Download PDF

Info

Publication number
US3818541A
US3818541A US00319497A US31949772A US3818541A US 3818541 A US3818541 A US 3818541A US 00319497 A US00319497 A US 00319497A US 31949772 A US31949772 A US 31949772A US 3818541 A US3818541 A US 3818541A
Authority
US
United States
Prior art keywords
shell
shaft
castor
side walls
roller
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.)
Expired - Lifetime
Application number
US00319497A
Other languages
English (en)
Inventor
Raymond Robert James Daniels
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.)
Guy Raymond Engineering Co Ltd
Original Assignee
Guy Raymond Engineering Co Ltd
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 Guy Raymond Engineering Co Ltd filed Critical Guy Raymond Engineering Co Ltd
Application granted granted Critical
Publication of US3818541A publication Critical patent/US3818541A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0036—Castors in general; Anti-clogging castors characterised by type of wheels
    • B60B33/0042—Double or twin wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors

Definitions

  • the present invention relates to a castor for attachment to the leg or base of an article of furniture.
  • a conventional castor comprises a roller mounted on a horizontal shaft, the ends of which are journalled in a rigid housing or shell which is itself pivotally mounted on a vertical shaft which is offset from the roller shaft so that the shell and roller can rotate about a vertical axis and the roller can rotate about a horizontal axis.
  • the shell of this type of castor has been formed from a metal or metal alloy rather than a synthetic plastics material although synthetic plastics materials have substantial cost and design advantages, because it has not been possible hitherto to design a housing having sufficient strength and rigidity from a synthetic plastics material.
  • the castor of the present invention comprises a hollow shell of synthetic plastics material open at the bottom to receive a roller and having two spaced side -walls, a shaft mounted across the side walls of the shell so as to support the side walls of the shell against compressive and bursting forces, a free running roller mounted on the shaft and vertical support means on the shell offset laterally from the shaft for mounting the shell pivotally on a supporting member.
  • each side wall is formed with a T-section socket
  • the shaft is formed with a groove adjacent each end of the shaft and the ends of the shaft are slidably engaged in the slots, so as to be contained wholly within the castor.
  • the roller can be formed from any suitable material but is preferably moulded from a synthetic plastic such as nylon and may comprise two similar portions which are independently rotatable.
  • FIG. is a section taken on the line V-V of FIG. 3;
  • FIG. 7 is a view of a detail of the roller of FIGS. 1 to 6 on an enlarged scale.
  • FIG. 8 is a section similar to FIG. 6'but taken through a modified castor.
  • a castor is indicated generally at 10 which comprises a hollow shell 11, a shaft 12 mounted I in the shell 1 l and a roller 13 which is mounted for free rotation on the shaft 12.
  • the shell is formed as an injection moulding from a synthetic plastics material such as nylon or ABS and is hollow so as to form a cavity to accept the roller 13.
  • the shell 11 is formed with two side walls 14 and 15 respectively, two end walls 16 and 17 respectively and an upper wall 18.
  • the side walls and the end walls are outwardly slightly convex in shape to give a pleasing appearance to the shell and the upper wall 18 slopes downwardly towards the front end wall 17.
  • a boss 19 projects upwardly from the upper wall 18 adjacent the rear end wall 16 and the boss 19 is formed with support means comprising a bore 20 adapted to receive a spigot.
  • the side walls 14 and 15 of the shell 11 are formed with upwardly extending thickened portions 21 and 22 respectively on their inside faces and slots or sockets 23 and 24 are formed in the thickened portions 21 and 22 respectively.
  • Each socket 23 and 24 is T-shaped in cross-section and extends a short distance upwardly from the bottom edge of the respective side walls.
  • the shaft 12 is formed with grooves 25 and 26 respectively adjacent its ends and the dimensions of the T-section sockets 23 and 24 are such that the grooved ends of the shaft 12 are a press fit into the sockets 23 and 24, as shown in FIG. 4.
  • Two convex shaft retaining cam faces, 27 and 28, are formed on the facing side walls of each socket 23 and 24 a short distance from the bottom of the slot to assist in retaining the shaft I2 in position at the ends of the slots.
  • the shaft retaining cam faces are shown in FIG. 7.
  • the shaft 12 is a tight friction fit in the sockets 23 and 24 and serves as a reinforcement for the shell 11, tying the side walls 14 and 15 together and substantially increasing the resistance of the shell to both compressive and bursting forces. It will also be noted that the shaft 12 is contained wholly within the shell 11 and the ends of the shaft are hidden.
  • the roller 13 is mounted on the shaft 12 as a slide fit before the shaft 12 is mounted in the sockets 23 and 24 of the shell 11 and as can be seen from FIG. 6 the roller 13 comprises two similar portions 29 and 30.
  • Each portion 29 and 30 of the roller comprises a smooth annular outer face 31 and 32 respectively, a flat end wall 33 and 34 respectively, a central tubular portion 35 and 36 respectively, which is mounted on the shaft 12, and a plurality of internal stiffening spokes 37 and 38 respectively.
  • the upper wall 18 of the shell 11 is also formed on its inside face with a plurality of ribs 40 which extend partly down the side walls and end walls and which stiffen and strengthen the shell further.
  • the bore 20 in the boss 19 is adapted to receive a pin 41, which is shown in FIG. 5, and which comprises a spigot 42 and'a bearing flange 43.
  • the spigot 42 is a FIG. 6 is a section taken on the line VI-VI of FIG.
  • the pin 41 serves as a means for mounting the castor 10 on the end of the leg of an article of furniture and the castor 10 is freely rotatable about the spigot 42 when the spigot is located in the borev 20.
  • any suitable type of fitting for mounting the castor on an article of furniture can be provided with a spigot for insertion in the bore 20 and the type of mounting shown in FIG. does not form a part of the present invention.
  • a metal spigot can be permanently and non-rotatably moulded or bonded into the boss 19 so as to have a portion projecting upwardly from the boss.
  • the upwardly projecting portion of the fixed spigot can then be inserted into a fitting on the end of a furniture leg to secure the castor rotatably to the leg.
  • the end faces 33 and 34 of the two portions 29'and 30 of the roller 13 are a close fit between the inner faces of the enlarged portions 21 and 22 of the side walls 14 and so that there is very little play between the roller 13 and the sidev walls 14 and 15.
  • the two portions 29 and 30 of the roller 13 are thus held closely together although free to rotate in opposite senses orv together as required and any tendancy for dust or dirt to get into the roller or onto the shaft I2 is eliminated or at least substantially reduced.
  • the close fit between'the shaft and the roller and between the end faces of the roller and the inside faces of the shell also substantially reduce the risk of hairs or similar strands from becoming wrapped around the ends of the shaft and interfering with the running of the roller.
  • the roller is preferably formed from nylon or a material similar to that from which the shell is made and can either be moulded in two portions as shown in FIG. 1
  • a castor is indicated generally at 50 which is similar to the fastener 10 of FIGS. 1 to 7 except in so far as it includes a unitary roller 51 mounted in a shell 52 which is substantially narrower than the shell 11 of the castor 10 to accommodate the unitary roller 51.
  • the unitary roller 51 can optionally be formed with an integral moulded outer surface 53 as shown in the lower half of the Figure, or alternatively it can be provided with an outer covering 54 as shown in the upper portion of the Figlire, the outer covering 54 being formed from a synthetic rubber material or foam polyurethane which is softer than the remainder of the roller and which is moulded in place onto the outside sur- Further minor modifications can be made to the above described embodiment without departing from the spirit and scope of the invention which is best described in the following claims.
  • a castor comprising a hollow, unitary shell of synthetic plastics material open at the bottom and having two generally parallel laterally spaced side walls, an inner surface on each side wall formed with a vertical socket substantially T-shaped in cross section extending upwardly from the open bottom of the shell, integral restriction means spaced from the bottom of each socket, a shaft extending across said side walls provided with an annular groove adjacent each end forming end portions to fit saidv sockets between said restriction means and the socket bottom whereby movement of said shaft along said sockets is resisted by said restriction means so as to retain said shaft in position, said shaft positively'tying the side walls of the shell together and supporting same against compressive and twisting forces, a free running roller on said shaft, and vertical support means on said shell laterally offset from the axis thereof for mounting the shell pivotally on a supporting member.
  • a castor as claimed in claim 1, wherein said integral restriction means comprises cam faces in said socket walls.
  • roller comprises two similar, unitary portions of synthetic plastics material independently rotatable on said shaft and completely filling the width and depth of said shell, said portions having flat closely arranged inner faces in sliding engagement with each other for militating against ingress of foreign matter therebetween, and exterior annular surfaces on said portions cooperatingly shaped to provide a convex rolling surface.
  • each roller portion comprises a flat outer wall and flat side walls on said shell arranged in close parallel juxtaposition to said flat outer walls respectively to minimize the entrance of foreign matter therebetween.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Legs For Furniture In General (AREA)
US00319497A 1972-01-07 1972-12-29 Castors Expired - Lifetime US3818541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB88972A GB1373582A (en) 1972-01-07 1972-01-07 Castors

Publications (1)

Publication Number Publication Date
US3818541A true US3818541A (en) 1974-06-25

Family

ID=9712273

Family Applications (1)

Application Number Title Priority Date Filing Date
US00319497A Expired - Lifetime US3818541A (en) 1972-01-07 1972-12-29 Castors

Country Status (7)

Country Link
US (1) US3818541A (enrdf_load_stackoverflow)
AU (1) AU468638B2 (enrdf_load_stackoverflow)
DE (1) DE2300720A1 (enrdf_load_stackoverflow)
DK (1) DK135752B (enrdf_load_stackoverflow)
FR (1) FR2167763B1 (enrdf_load_stackoverflow)
GB (1) GB1373582A (enrdf_load_stackoverflow)
NO (1) NO135207C (enrdf_load_stackoverflow)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219904A (en) * 1976-12-29 1980-09-02 Emilsider Meccanica S.n.c. di Melara Francescantonio & Co. Self-orientable wheel mechanism for furniture
US4229856A (en) * 1977-09-21 1980-10-28 Lamondine S.A. Wheel support arrangements
US4509227A (en) * 1982-09-30 1985-04-09 Whirlpool Corporation Three-piece swivel caster having a force transfer roller
USD282439S (en) 1983-05-02 1986-02-04 Bernard Kotzin Caster
USD308815S (en) 1988-08-22 1990-06-26 Shepherd Products U.S., Inc. Caster with arcurate hood cover
US5136751A (en) * 1991-04-30 1992-08-11 Master Manufacturing Co. Wheel assembly
USD339736S (en) 1991-05-13 1993-09-28 Sugatsune Industrial Co., Ltd. Caster
USD355109S (en) 1993-11-22 1995-02-07 The Hoover Company Outrigger caster support
US5408723A (en) * 1992-02-21 1995-04-25 Graco Children's Products, Inc. Swivel wheel assembly
US5568671A (en) * 1994-12-01 1996-10-29 Fki, Industries, Inc. Caster assembly with integral plastic stem and horn and with removable axle lock cap
USD382465S (en) * 1995-11-14 1997-08-19 Rubbermaid Health Care Products Inc. Caster cover
US6550100B2 (en) 2001-02-08 2003-04-22 Waxman Industries, Inc. Caster assembly with multi-position support pieces
US20040068831A1 (en) * 2002-07-06 2004-04-15 Caruso Jerome C. Caster construction
US6728991B2 (en) 2002-04-15 2004-05-04 Waxman Industries, Inc. Caster assembly with sliding side support piece
US20040221423A1 (en) * 2003-05-09 2004-11-11 Po-Chuan Tsai Office chair caster with a structural improvement
US6880203B1 (en) * 2002-12-31 2005-04-19 Aubin Industries, Inc. Independently rotatable, split tread, single wheel assembly
US20050144755A1 (en) * 2004-01-06 2005-07-07 Etsuo Miyoshi Bag with caster wheels
US20060048335A1 (en) * 2004-09-03 2006-03-09 Michalos Peter C Bore caster
US20080276417A1 (en) * 2007-05-07 2008-11-13 Frame William F Caster with weight transferring tab
US20090260181A1 (en) * 2008-04-18 2009-10-22 Dennis Jones Caster
USD602769S1 (en) 2008-05-05 2009-10-27 Jacob Holtz Company Caster
US20100229340A1 (en) * 2009-03-11 2010-09-16 Pao-Hsien Cheng Caster
US20110197395A1 (en) * 2010-02-12 2011-08-18 Schulte John K Caster brake assembly
US9027204B2 (en) 2007-05-07 2015-05-12 Jacob Holtz Company Casters having weight transferring tab
US20150352455A1 (en) * 2013-01-25 2015-12-10 Buildex (F.E.) Limited Rotary assembly comprising a flexible wire
US11110746B2 (en) * 2018-04-26 2021-09-07 Kubota Corporation Work vehicle
EP4530093A1 (de) * 2023-09-28 2025-04-02 Faigle Kunststoffe GmbH Laufrollenanordnung

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328469C3 (de) * 1973-06-05 1984-09-27 Drabert Söhne Minden (Westf.), 4950 Minden Schwenkbare Laufrolle für Sitzmöbel
DE4031685C3 (de) * 1990-10-04 2001-11-08 Mannesmann Ag Laufradblock
EP0486850A1 (de) * 1990-11-23 1992-05-27 Wanzl GmbH & Co. Entwicklungs-KG Lenkrolle
GB2277017A (en) * 1993-01-27 1994-10-19 George Trevor Pritchard Castor arrangement
USD358690S (en) 1993-12-27 1995-05-23 Hohulin Samuel E Wheel design for a vacuum cleaner
GB2483261A (en) * 2010-09-01 2012-03-07 Simon York Swivel caster with reduced resistance to directional change

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US19369A (en) * 1858-02-16 Castes
US300782A (en) * 1884-06-24 Caster
US409495A (en) * 1889-08-20 Caster
US556978A (en) * 1896-03-24 Caster
US2170257A (en) * 1937-02-04 1939-08-22 Remington Rand Inc Caster
US3210795A (en) * 1962-05-02 1965-10-12 Stewart Warner Corp Caster socket
GB1007210A (en) * 1963-12-31 1965-10-13 Flexello Castors & Wheels Ltd Improvements in or relating to castors
US3343204A (en) * 1965-11-01 1967-09-26 Kirsch Co Modular conveyor
US3345675A (en) * 1966-01-13 1967-10-10 Raymond Haydock Jr Furniture caddy carrier
US3451095A (en) * 1967-07-17 1969-06-24 Eagle Picher Ind Inc Cushioned roller
US3537125A (en) * 1967-10-25 1970-11-03 Us Caster Corp Caster with integral horn and pintle and method of making same
US3713186A (en) * 1971-03-12 1973-01-30 Stewart Warner Corp Wheel stake

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042461A (en) * 1958-11-20 1962-07-03 Signal Mfg Co Dolly for cleaning apparatus with improved wheel bearings
DE6803430U (de) * 1968-10-23 1969-02-13 Kemmann & Koch Rollbeschlag fuer moebel

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US19369A (en) * 1858-02-16 Castes
US300782A (en) * 1884-06-24 Caster
US409495A (en) * 1889-08-20 Caster
US556978A (en) * 1896-03-24 Caster
US2170257A (en) * 1937-02-04 1939-08-22 Remington Rand Inc Caster
US3210795A (en) * 1962-05-02 1965-10-12 Stewart Warner Corp Caster socket
GB1007210A (en) * 1963-12-31 1965-10-13 Flexello Castors & Wheels Ltd Improvements in or relating to castors
US3343204A (en) * 1965-11-01 1967-09-26 Kirsch Co Modular conveyor
US3345675A (en) * 1966-01-13 1967-10-10 Raymond Haydock Jr Furniture caddy carrier
US3451095A (en) * 1967-07-17 1969-06-24 Eagle Picher Ind Inc Cushioned roller
US3537125A (en) * 1967-10-25 1970-11-03 Us Caster Corp Caster with integral horn and pintle and method of making same
US3713186A (en) * 1971-03-12 1973-01-30 Stewart Warner Corp Wheel stake

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219904A (en) * 1976-12-29 1980-09-02 Emilsider Meccanica S.n.c. di Melara Francescantonio & Co. Self-orientable wheel mechanism for furniture
US4229856A (en) * 1977-09-21 1980-10-28 Lamondine S.A. Wheel support arrangements
US4509227A (en) * 1982-09-30 1985-04-09 Whirlpool Corporation Three-piece swivel caster having a force transfer roller
USD282439S (en) 1983-05-02 1986-02-04 Bernard Kotzin Caster
USD308815S (en) 1988-08-22 1990-06-26 Shepherd Products U.S., Inc. Caster with arcurate hood cover
US5136751A (en) * 1991-04-30 1992-08-11 Master Manufacturing Co. Wheel assembly
USD339736S (en) 1991-05-13 1993-09-28 Sugatsune Industrial Co., Ltd. Caster
US5408723A (en) * 1992-02-21 1995-04-25 Graco Children's Products, Inc. Swivel wheel assembly
USD355109S (en) 1993-11-22 1995-02-07 The Hoover Company Outrigger caster support
US5568671A (en) * 1994-12-01 1996-10-29 Fki, Industries, Inc. Caster assembly with integral plastic stem and horn and with removable axle lock cap
USD382465S (en) * 1995-11-14 1997-08-19 Rubbermaid Health Care Products Inc. Caster cover
US6550100B2 (en) 2001-02-08 2003-04-22 Waxman Industries, Inc. Caster assembly with multi-position support pieces
US6728991B2 (en) 2002-04-15 2004-05-04 Waxman Industries, Inc. Caster assembly with sliding side support piece
US20040068831A1 (en) * 2002-07-06 2004-04-15 Caruso Jerome C. Caster construction
US6880203B1 (en) * 2002-12-31 2005-04-19 Aubin Industries, Inc. Independently rotatable, split tread, single wheel assembly
US20040221423A1 (en) * 2003-05-09 2004-11-11 Po-Chuan Tsai Office chair caster with a structural improvement
US20050144755A1 (en) * 2004-01-06 2005-07-07 Etsuo Miyoshi Bag with caster wheels
US7681702B2 (en) * 2004-01-06 2010-03-23 Swany Corporation Bag with caster wheels
US20060048335A1 (en) * 2004-09-03 2006-03-09 Michalos Peter C Bore caster
US8042226B2 (en) 2007-05-07 2011-10-25 Jacob Holtz Company Caster with weight transferring tab
US20080276417A1 (en) * 2007-05-07 2008-11-13 Frame William F Caster with weight transferring tab
US7546662B2 (en) 2007-05-07 2009-06-16 Jacob Holtz Company Caster with weight transferring tab
US20090211054A1 (en) * 2007-05-07 2009-08-27 Frame William F Caster with weight transferring tab
US9027204B2 (en) 2007-05-07 2015-05-12 Jacob Holtz Company Casters having weight transferring tab
US8407856B2 (en) 2007-05-07 2013-04-02 Jacob Holtz Company Caster with weight transferring tab
US20090260181A1 (en) * 2008-04-18 2009-10-22 Dennis Jones Caster
USD602769S1 (en) 2008-05-05 2009-10-27 Jacob Holtz Company Caster
US20100229340A1 (en) * 2009-03-11 2010-09-16 Pao-Hsien Cheng Caster
US20110197395A1 (en) * 2010-02-12 2011-08-18 Schulte John K Caster brake assembly
US8181310B2 (en) * 2010-02-12 2012-05-22 Fredman Bros. Furniture Company, Inc. Caster brake assembly
US20150352455A1 (en) * 2013-01-25 2015-12-10 Buildex (F.E.) Limited Rotary assembly comprising a flexible wire
US9604152B2 (en) * 2013-01-25 2017-03-28 Buildex (F.E.) Limited Rotary assembly comprising a flexible wire
US11110746B2 (en) * 2018-04-26 2021-09-07 Kubota Corporation Work vehicle
EP4530093A1 (de) * 2023-09-28 2025-04-02 Faigle Kunststoffe GmbH Laufrollenanordnung

Also Published As

Publication number Publication date
AU5071673A (en) 1974-07-04
FR2167763A1 (enrdf_load_stackoverflow) 1973-08-24
NO135207B (enrdf_load_stackoverflow) 1976-11-22
DE2300720A1 (de) 1973-07-12
NO135207C (enrdf_load_stackoverflow) 1977-03-02
FR2167763B1 (enrdf_load_stackoverflow) 1977-04-22
GB1373582A (en) 1974-11-13
AU468638B2 (en) 1976-01-15
DK135752B (da) 1977-06-20
DK135752C (enrdf_load_stackoverflow) 1977-11-07

Similar Documents

Publication Publication Date Title
US3818541A (en) Castors
US3987875A (en) Support accessories for luggage
US7647673B2 (en) Self-orienting caster for pieces of furniture and the like
US3977040A (en) Castor
US5390393A (en) Caster with a fouling-resistant bearing cup feature
US2800679A (en) Caster mounting
US8015664B2 (en) Twin-wheel caster
US12104744B2 (en) Turner apparatus
US7610682B2 (en) Method of affixing a caster on a wooden or plastic furniture leg
US3487495A (en) Caster assembly
US20050060840A1 (en) Caster system used with wooden or plastic legs for furniture
US3743366A (en) Drawer suspension apparatus
IT8904864A1 (it) Guida di estrazione per cassetti
US3894310A (en) Twin-wheeled castor
CN220996188U (zh) 一种用于车辆座椅滑轨的防尘伸缩机构
CN201217365Y (zh) 一种滚动平稳便于装配的万向轮
US2985907A (en) Means for suspending curtains
CN216995587U (zh) 一种便于收纳的可视化滚塑箱
US4749204A (en) Cart wheel structure
US3451734A (en) Plastic roller
CN220482985U (zh) 一种脚轮
CN222698212U (zh) 一种静音轮及行李箱
CN112960056B (zh) 设u型螺杆中间连接机构的平衡车
CN217310185U (zh) 滚轮、碗篮及洗碗机
CN214026857U (zh) 一种注塑机滑盖结构