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US3848884A - Wheeled trolley - Google Patents

Wheeled trolley Download PDF

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Publication number
US3848884A
US3848884A US00319460A US31946072A US3848884A US 3848884 A US3848884 A US 3848884A US 00319460 A US00319460 A US 00319460A US 31946072 A US31946072 A US 31946072A US 3848884 A US3848884 A US 3848884A
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US
United States
Prior art keywords
backbone
supports
mounting
frame according
pivotal
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
US00319460A
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English (en)
Inventor
W Lines
A Alsop
E Ross
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3848884A publication Critical patent/US3848884A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/08—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/068—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable by sliding a bushing along a rod, e.g. like folding means of an umbrella
    • 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
    • B62B2205/02—Hand-propelled vehicles or sledges being foldable or dismountable when not in use foldable widthwise

Definitions

  • ABSTRACT This invention is concerned with a folding four wheeled frame for a pushchair which has two front and two rear upwardly extending supports each of which carries at its lower end a wheel.
  • the supports are pivotally connected to an upwardly extending backbone, and also connected near their lower ends to the lower end of the backbone by means of separate pivotal links.
  • the front supports are connected near their upper ends to a first mounting adjacent to the top of the backbone by means of separate pivotal links, and the upper ends of the rear supports are pivotally connected to a second mounting on the backbone adjacent to the first mounting.
  • the arrangement of the supports, backbone and mountings is such that the two mountings can be moved relatively to one another along the backbone whereupon the pivotal links enable the four supports to swing between a closed position nearer to the backbone and an open position further away from the backbone.
  • such a frame comprises two front and two rear upwardly extending supports each of which carries at its lower end a wheel and which are pivotally connected to an upwardly extending backbone, each of the supports being connected adjacent to their lower ends to the lower end of the backbone by means of separate pivotal links, each of the front supports being connected adjacent to their upper ends to a fist mounting adjacent to the top of the backbone by means of separate pivotal links, and the upper ends of the rear supports being pivotally connected to a second mounting on the backbone adjacent to the first mounting, the arrangement being such that the two mountings can be moved relatively to one an other along the backbone whereupon the pivotal links enable the four supports to swing between a closed position nearer to the backbone and an open position further away from the backbone.
  • the first mounting is fixed to the backbone and the upper ends of the rear supports are pivotally connected directly to the second mounting which is slidable to and fro along the backbone above the first mounting.
  • the six pivotal links swing upwards about their pivotal connections to the backbone to bring the four supports close to the backbone and to shorten the overall length of the frame.
  • a further pivotal link may be provided between each of those interconnecting the upper ends of the front supports and the first mounting, with the second mounting.
  • the relative movement between the two mountings may be provided by grasping the two mountings in the two hands and moving them together or apart but preferably a' handle is provided which is pivoted to one of the mountings and is connected to the other mounting through a pivotal link so that by swinging the handle relatively to the backbone the two mountings are drawn together or forced apart.
  • This movement could also be achieved by the use of a pinion and rack.
  • the trolley will normally be provided with a pushing handle and this may be an integral extension of the upper end of the backbone. Alternatively it may provide the lever handle which is used for urging the two mountings together or apart and this is particularly suitable since it provides a good leverage for opening and closing the frame.
  • the pushing handle is pivoted relatively to the backbone it will be necessary in the open position to fix the pushing handle relatively to the backbone and this may be achieved by a simple swing catch.
  • the pushing handle When the frame is closed the pushing handle may then fold downwards alongside the backbone, thus further shortening the overall length of the frame.
  • the folding link which is prevented from passing through its central position, may have its centre point attached to the lower end of the backbone by means of a strap which is tensioned on opening and which thus adds to the rigidity of the frame.
  • the lower ends of the rear supports may also require additional constraint and for this purpose the backbone these pivotal links are preferably attached to the fourth mounting through a universal joint.
  • a particularly suitable form of universal joint comprises two plates which extend across the backbone and are secured one to each side of it, the plates having at each end apertures or recesses in alignment with one another and trapping between them a ball end which is attached to the pivotal link.
  • the L-shape of the backbone also gives clearance forv the seat or other part to be carried by the frame.
  • FIG. 1 is a front perspective view of the chair erected
  • FIG. 2 is a corresponding rear perspective view
  • FIG. 3 is a sidei'view showing the chair partially folded.
  • FIG. 4 is a rear view showing the chair completely folded.
  • the illustrated pushchair has a frame with tubular front supports 5, which are cranked to provide arm rests, and tubular rear supports 6, all provided at their lower ends with ground wheels 7 supported by double plate mountings 8.
  • the front and rear supports are all connected to an L-shaped backbone 9. At their upper ends the front supports 5 are each connected through a double bar pivotal link 10 to a corresponding projecting wing of a plastics mounting 11 which is fixed on the backbone 9,
  • each pivotal link 10 is connected through a further double bar pivotal link 12 to a corresponding wing on another plastics mounting 13 which is slidable along the backbone 9.
  • each of the rear supports 6 is pivoted directly to a corresponding wing of the mounting l3.
  • a pushing handle 23 is pivoted at its lower end to the mounting 13 and through a double bar pivotal link 24 to the mounting 11.
  • the handle 23 carries a cam lock 25 which can be engaged over the upper end of the backbone 9 to locate the handle in its pushing position.
  • A-flexible fabric bucket seat 26 is mounted on the front supports by means of sleeves 27. In conventional manner the seat may be provided with a harness belt 28.
  • One rear wheel is as shown in FIG. 2, provided with a brake 29 operated by a handle 30.
  • the chair is locked in the erect position shown in FIGS. 1 and 2 by means of the lock 25.
  • the lock 25 is released and the handle 23 is folded backwards and downwards relatively to the backbone 9.
  • This movement coupled with the reaction in the link 24 causes the mounting 13 to slide up the backbone relatively to the mounting 11 carrying the upper ends of the front and rear supports 5 and 6' with it.
  • the links 14 and 17 fold upwards about the mounting l6 and the supports move close to the backbone with the wheels 7 adjacent to one another as shown in FIG. 4.
  • the end of the carrying handle 23 snaps behind a hood 31 which is shown in FIG. 2.
  • the reverse procedure is adopted to reerect the pushchair.
  • the centre link of the chain moves downwards as the inner ends of the footrest links 21 fold downwards about their pivotal connections to the mountings 8.
  • the chain 20 always folds downwards, rather than upwards, because when unfolded it is held below a dead centre position by abutments formed by the inner ends of the links 21 egaging the underside of the web of the centre link, which is downwardly channel-shaped.
  • the strap 22 In the erect position the strap 22 is in tension holding the abutments between the links 21 and the centre link hard against one another, thus contributing appreciably to the strength and stability of the frame.
  • a folding wheeled frame for a pushchair comprismg an upwardly extending backbone
  • a frame according to claim '1 comprising two arms one of which is pivoted to said mounting and the other of which is pivotally connected to said second fixed point, one of said arms being connected to the other at a point intermediate its length so that said other arm constitutes a lever capable of moving said mounting toward or away from said fixed point.
  • a frame according to claim 5 comprising a swing camlock latch positioned to hold said backbone in the erect position, said handle folding downwards alongside the backbone in the folded condition.
  • a frame according to claim 1 comprising a folding pivotal link directly between the lower ends of said front supports.
  • a frame according to claim 1 in which the backbone is L-shaped with its lower end extending forwards, said four pivotal links from adjacent to the lower ends of said four supports being pivotally connected to said backbone adjacent to the front end of said forwardly extending portion of said backbone, the lower ends of said rear supports being also connected by means of pivotal links to said backbone just above the bend in said backbone.
  • a frame according to claim 9 in which said pivotal links attached to said forwardly extending backbone portion are attached through universal joints, each consisting of plates having opposed apertures in which a ball end fixed to said pivotal link is sandwiched.
  • a frame according to claim 1 supportingly connected to a bucket seat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
  • Motorcycle And Bicycle Frame (AREA)
US00319460A 1972-01-03 1972-12-29 Wheeled trolley Expired - Lifetime US3848884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14772*[A GB1370701A (en) 1972-01-03 1972-01-03 Wheeled trolley

Publications (1)

Publication Number Publication Date
US3848884A true US3848884A (en) 1974-11-19

Family

ID=9699246

Family Applications (1)

Application Number Title Priority Date Filing Date
US00319460A Expired - Lifetime US3848884A (en) 1972-01-03 1972-12-29 Wheeled trolley

Country Status (8)

Country Link
US (1) US3848884A (it)
BE (1) BE793645A (it)
CH (1) CH562120A5 (it)
DE (1) DE2264344C3 (it)
ES (1) ES408909A1 (it)
FR (1) FR2167594A5 (it)
GB (1) GB1370701A (it)
IT (1) IT973690B (it)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936069A (en) * 1974-01-24 1976-02-03 Pietro Giordani Collapsible baby stroller
US3995882A (en) * 1975-04-14 1976-12-07 Watkins Mervyn M Folding support structure
US20080191451A1 (en) * 2004-09-16 2008-08-14 Driessen Franciscus Johnnes Co Mobile Carriage, for Example for a Buggy ( as Amended)
US20080224451A1 (en) * 2007-03-15 2008-09-18 Vegt Herman Van Der Device For Transporting A Child
EP2011716A1 (en) * 2007-07-03 2009-01-07 Graco Children's Products Inc. Baby carriage and seat hammock
EP2907496A1 (en) 2014-02-14 2015-08-19 Trionic Sverige AB Collapsible wheeled support or carrier
CN105216848A (zh) * 2008-10-10 2016-01-06 Scs(伦敦)有限公司 用于车辆的设备和一种使用该车辆的方法
CN103057577B (zh) * 2003-01-09 2016-06-22 康贝株式会社 童车
US20200010107A1 (en) * 2018-07-03 2020-01-09 Zhongshan Aifubao Daily Products Co., Ltd. Trailer for stroller
US10766517B2 (en) * 2018-03-16 2020-09-08 Strova, Inc. Stroller assembly
CN113712746A (zh) * 2021-10-12 2021-11-30 北京无疆科技有限公司 折叠设备用转轴装置及折叠设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20112583U1 (de) * 2001-08-01 2001-12-06 Britax-Teutonia Kinderwagenfabrik GmbH, 32120 Hiddenhausen Kinderwagen
FR2850073B1 (fr) 2003-01-17 2006-03-17 Gh Solutions Siege deployable
ES2356455B1 (es) * 2009-02-23 2012-02-15 Play, S.A. Carrito infantil.
CN106741095A (zh) * 2016-12-15 2017-05-31 昆山贝佳乐儿童用品有限公司 婴儿推车前后撑管折合机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB965159A (en) * 1962-11-23 1964-07-29 Reginald John Turney Improvements in or relating to folding structures
CA798194A (en) * 1968-11-05 F. Maclaren Owen Structures for folding baby-carriages, chairs, and the like
US3556546A (en) * 1967-08-21 1971-01-19 Herschall F Garhan Baby strollers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA798194A (en) * 1968-11-05 F. Maclaren Owen Structures for folding baby-carriages, chairs, and the like
GB965159A (en) * 1962-11-23 1964-07-29 Reginald John Turney Improvements in or relating to folding structures
US3556546A (en) * 1967-08-21 1971-01-19 Herschall F Garhan Baby strollers

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936069A (en) * 1974-01-24 1976-02-03 Pietro Giordani Collapsible baby stroller
US3995882A (en) * 1975-04-14 1976-12-07 Watkins Mervyn M Folding support structure
CN103057577B (zh) * 2003-01-09 2016-06-22 康贝株式会社 童车
US20080191451A1 (en) * 2004-09-16 2008-08-14 Driessen Franciscus Johnnes Co Mobile Carriage, for Example for a Buggy ( as Amended)
US7883104B2 (en) * 2004-09-16 2011-02-08 Musty B.V. Mobile carriage, for example for a buggy
US20080224451A1 (en) * 2007-03-15 2008-09-18 Vegt Herman Van Der Device For Transporting A Child
EP2011716A1 (en) * 2007-07-03 2009-01-07 Graco Children's Products Inc. Baby carriage and seat hammock
US20090008909A1 (en) * 2007-07-03 2009-01-08 Kenzou Kassai Baby carriage and seat hammock
CN105216848A (zh) * 2008-10-10 2016-01-06 Scs(伦敦)有限公司 用于车辆的设备和一种使用该车辆的方法
EP2907496A1 (en) 2014-02-14 2015-08-19 Trionic Sverige AB Collapsible wheeled support or carrier
US9821827B2 (en) 2014-02-14 2017-11-21 Trionic Sverige Ab Collapsible wheeled support or carrier
US10766517B2 (en) * 2018-03-16 2020-09-08 Strova, Inc. Stroller assembly
US20200010107A1 (en) * 2018-07-03 2020-01-09 Zhongshan Aifubao Daily Products Co., Ltd. Trailer for stroller
US10829141B2 (en) * 2018-07-03 2020-11-10 Zhongshan Aifubao Daily Products Co., Ltd. Trailer for stroller
CN113712746A (zh) * 2021-10-12 2021-11-30 北京无疆科技有限公司 折叠设备用转轴装置及折叠设备
CN113712746B (zh) * 2021-10-12 2023-08-29 安徽金百合医疗器械有限公司 折叠设备用转轴装置及折叠设备

Also Published As

Publication number Publication date
BE793645A (fr) 1973-07-03
DE2264344B2 (de) 1977-12-15
GB1370701A (en) 1974-10-16
ES408909A1 (es) 1976-03-01
FR2167594A5 (it) 1973-08-24
DE2264344A1 (de) 1973-07-12
CH562120A5 (it) 1975-05-30
IT973690B (it) 1974-06-10
DE2264344C3 (de) 1978-08-03

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