US3743344A - Construction of a trolley - Google Patents

Construction of a trolley Download PDF

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Publication number
US3743344A
US3743344A US00174114A US3743344DA US3743344A US 3743344 A US3743344 A US 3743344A US 00174114 A US00174114 A US 00174114A US 3743344D A US3743344D A US 3743344DA US 3743344 A US3743344 A US 3743344A
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US
United States
Prior art keywords
trolley
stretcher framework
stay member
pair
recited
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
US00174114A
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English (en)
Inventor
G Jameson
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.)
Institue for Industrial Research and Standards
Original Assignee
Institue for Industrial Research and Standards
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 Institue for Industrial Research and Standards filed Critical Institue for Industrial Research and Standards
Application granted granted Critical
Publication of US3743344A publication Critical patent/US3743344A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00—Stretchers
    • A61G1/04—Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
    • A61G1/052—Struts, spars or legs
    • A61G1/056—Swivelling legs
    • A61G1/0565—Swivelling legs simultaneously folding, e.g. parallelogram structures
    • A61G1/0567—Swivelling legs simultaneously folding, e.g. parallelogram structures folding in x-shape
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00—Stretchers
    • A61G1/013—Stretchers foldable or collapsible
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00—Stretchers
    • A61G1/02—Stretchers with wheels
    • A61G1/0206—Stretchers with wheels characterised by the number of supporting wheels if stretcher is extended
    • A61G1/0212—2 pairs having wheels within a pair on the same position in longitudinal direction, e.g. on the same axis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00—Stretchers
    • A61G1/02—Stretchers with wheels
    • A61G1/0231—Stretchers with wheels having only fixed wheels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00—Stretchers
    • A61G1/02—Stretchers with wheels
    • A61G1/025—Stretchers with wheels having auxiliary wheels, e.g. wheels not touching the ground in extended position
    • A61G1/0262—Stretchers with wheels having auxiliary wheels, e.g. wheels not touching the ground in extended position having loading wheels situated in the front during loading

Definitions

  • a trolley for use particularily with ambulances and in hospitals which can be readily raised or lowered, fully collapsed to act as a stretcher, or folded to lie on a raised platform, the trolley having a stretcher framework which has two pairs of pivotally mounted wheel supporting legs.
  • the legs on each side of the trolley engage in a scissors like manner and are adapted for relative movement to raise and lower the trolley so that the stretcher framework is always horizontal.
  • Means are also provided to allow the legs to be folded rapidly.
  • This invention relates to a construction of trolley and in particular to a construction of trolley for use in hospitals and with ambulances.
  • a further object of the invention is to provide a trolley the legs of which may be readily folded for entry into for example an ambulance while at the same time ensuring that the legs cannot be inadvertently folded during use with the consequent risk of injury to a patient.
  • a still further object of the invention is to provide a trolley that can be rapidly collapsed for use as a stretcher.
  • FIG. I is a side view of a trolley according to the invention in the fully assembled position
  • FIG. 2 is a plan view of the trolley
  • FIG. 3 is a side view of the trolley being pushed onto a platform
  • FIG. 4 is a side view of the trolley collapsed for transport
  • FIG. 5 is a cross-sectional view in the direction of the arrows V V of FIG. 1.
  • FIG. 6 is a perspective view of portion of the trolley, in the assembled position
  • FIG. 7 is a perspective view of another portion of the trolley in the assembled position.
  • FIG. 8 is a perspective view of the portion of the trolley illustrated in FIG. 7 as the trolley is being collapsed.
  • the trolley comprises a stretcher framework 1, a pair of front legs 2 pivotally mounted at 3 on the stretcher framework 1, a pair of rear legs 4 pivotally mounted at 5 on the stretcher framework 1, securing means, indicated generally by the reference numeral 6, for releasably interconnecting a front leg 2 with the rear leg 4 on the same side of the trolley and a stay member 7 mounted between the front legs 2 and the stretcher framework 1.
  • the stretcher framework 1 which is manufactured from tubular steel or polished aluminum comprises two sets of longitudinal side bars 10, a front bar 11 and an end bar 12.
  • a cross-bar I3 is mounted between the side bars 10.
  • a pair of parallel longitudinal rails 14 is supplate 15 is mounted on each side bar 10 adjacent the front bar 11, and carries a wheel 16.
  • Fixed upstanding support rails 17, for clarity illustrated by interrupted lines, are provided to assist in retaining a patient in position.
  • a socket 18 having an outer top face 19 is provided on each of the side bars 10.
  • the front legs 2 are manufactured from flat plate and carry a transverse axle 20 which is used to support a ground engaging wheel 21 on each of the front legs 2. It will be noted that the wheels 21 form the rear wheels of the trolley.
  • the rear legs 4 are each manufactured from flat plate and carry a spaced apart length of tubing 22 which is bent adjacent its upper end to form a handle 23.
  • a stub axle 24 mounted between the rear leg 4 and the tubing 22 carries a ground engaging wheel 25.
  • the wheels 25 are the front wheels of the trolley.
  • the securing means 6 is formed by a curved track mounted on the front leg 2 and a wheel 31 mounted on the rear leg 4.
  • the curved guide track 30 is grooved to engage the wheel 31.
  • a lower support track 32, also grooved is provided to engage the wheel 31 when the wheel 31 is not in contact with the track 30.
  • the wheel 31 is mounted on a stub axle 33 which is in turn mounted in an elongated slot 34 in the rear leg 4.
  • the stub axle 33 is constrained laterally in the slot 34 by a pair of circular discs 35.
  • the slot 34 is downwardly inclined to the longitudinal axis of the rear leg 4 and is provided with a downwardly directed recess 36 at its upper end (see FIGS. 1 and 3).
  • a cranked lever 37 is pivotally mounted at 38 is on the rear leg 4 adjacent the recess 36.
  • One end 42 of the cranked lever 37 is adapted in use, as will be described below, to bear nal diagonal bracing bars 53.
  • the lower bar 51 is pivotported between the cross-bar l3 and the end bar 12.
  • a pair of spaced apart support plates 55 are mounted on the upper bar 50.
  • a shaft 56 is mounted between each support plate 55 and the adjacent side bar 52.
  • Each shaft 56 forms an inwardly directed lug 57 from the support plate 55 and also the support for a grooved wheel 58.
  • a hook 59 is pivotally mounted on each shaft 56 and embraces the rail 14. It will be noted from FIGS. 7 and 8 that the hooks 59 are so constructed as to allow the wheels 58 disengage the rails 14 in certain circumstances as will be described below, and to hang from the hooks 59.
  • a lead screw 60 is mounted in a bearing 62 on the cross bar 13 and in a tube 61 mounted on the end bar 12.
  • the lead screw 60 is provided with a handle 63.
  • a threaded block 64 is mountedon the lead screw 60 and is grooved at 65 to engage a guide bar 66.
  • the guide bar 66 is mounted between the end bar 12 and the cross bar 13, above and spaced apart from the lead screw 60. The guide bar 66 constrains the threaded block 64 to move along the lead screw 60 when the handle 63 is rotated.
  • a cover member 67 having a chamfered edge 67a is pivotally mounted at 68 on the threaded block 64 a re turn spring 69 is secured between the cover member 67 72'to the cover member 67 and fed through a hole 73v in the cross-bar 13, around a pulley block 74, mounted on the cross bar 13, through another hole 75 in the cross bar 13 to a coil spring 76, from the coil spring 76 through a hole 77 in the end bar 12 through a hole 78 in a bar 79, mounted on the tube 61.
  • the wire 71 is then led through a hollow handle 80 back through another hole 81 in the bar 78 through a hole 82 in the end bar 12 to the threaded block 64 at 83. It will be appreciated that as the threaded block 64 travels along the lead screw 60 that the wire will be constrained to move overthe pulley block 74 and through the handle 80.
  • Each lever 41 is operated causing the end 42 of the cranked lever 37 to pivot against its adjacent disc 35.
  • the stub axle 33 is forced out of the recess 36 and into the main portion of the slot 34.
  • the handle 23 may be pivoted downwards raising the rear leg 4 to lie alongside the stretcher framework 1 as illustrated by the interrupted lines in FIG. 3. When the rear leg 4 is fully raised the lip 39 lies across the outer top face 19 of the socket 18.
  • the trolley is now pushed forward on'the platform 90 until portion of the front legs 2 bear against the platform 90.
  • the weight of the trolley is on the wheels 16, and wheels 21.
  • the user lifts the trolley slightly thus removing the weight off the wheels 21.
  • There is however no weight being taken by the stay member 7 which will thus under its own weight pivot downwards about the ends 54 of its lower bar 51.
  • the stay member 7 will only pivot downwards a small distance when the hooks 59 will prevent further movement away from the rails 14.
  • the hollow handle 80 is pulled backwards causing the wire 71 to be drawn backwards through the holes 78, 77 and around the pulley block 74 and through the hole 73 thus pivoting the cover member 67 about its pivot point 68 and raising the slots 70 out of engagement with the lugs 57 [see FIGS. 7 and 8].
  • the front legs 2 may be pushed forward on to the platform 90.
  • the return spring 69 cause the cover member to assume its fonner position. When the trolley is pushed fully home on the platform it rests on the wheels 21 and 25.
  • the lever 41 is operated causing the cranked lever 37 to pivot to'disengage the lip 39 from the top face 19 of the socket 18.
  • the rear legs 4 pivot downwards the wheels 31 rolling on the lower support track 32 and the stub axles 33 in the slots 34 until they engage the recesses 36.
  • the handle 63 is rotated until the weight of the trolley. is on the wheels 21 and 25.
  • the present invention provides a construction of trolley which may be positioned at any desired normal trolley height, which may be varied in position as to height at any time whether loaded or not and which may be collapsed to a convenient size simply and rapidly.
  • the trolley cannot be collapsed or folded when supporting a weight on its four legs.
  • the weight of the trolley itself is sufficient to prevent its inadvertent collapsing.
  • a trolley for use particularly with ambulances and in hospitals which comprises;
  • each rear leg pivotally mounted on the stretcher framework, each rear leg crossing in a scissors like manner the front leg on the same side of the trolley;
  • means for releasably interconnecting on each side of the trolley the front and rear legs said means for releasably interconnecting on each side of the trolley the front and rear leg comprises;
  • a curved guide track mounted on the front leg whereby the track engages and rests upon the wheel; the shape of the track being such that as the trolley is raised or lowered the stretcher framework remains substantially horizontal;
  • leg movement control means on the stretcher framework for raising and lowering the trolley maintaining the stretcher framework substantially horizontal and a stay member pivotally mounted on one of the pairs of legs and connected to the leg movement control means.
  • a trolley as recited in claim 2 wherein the means for moving the wheel relative to the rear leg for disengagement with the curved track comprises:
  • a cranked lever pivotally mounted on the rear leg adjacent the recess in the slot;
  • leg movement control means comprises:
  • a block having a threaded hole, releasably connected to the stay member
  • the stretcher framework is provided with a pair of parallel longitudinal rails which the stay member engagesand dependsfrom, whereby the stay member is permitted limited movement away from the rails;
  • a cover member is pivotally mounted on the block
  • the cover member having a pair of cut-out slots for engagement with the lugs, the dimensions of the slots being such that the cover member can only be pivoted out of engagement with the lugs when the stay member is depending and spaced apart from the rails.
  • leg movement control means comprises:
  • the stretcher framework is provided with a pair of parallel longitudinal rails which the stay member engages and depends from, whereby the stay memher is permitted limited movement away from the rails;
  • a cover member is pivotally mounted on the block, the cover member having a pair of cut-out slots for engagement with the lugs, the dimensions of the slots being such that the cover member can only be pivoted out of engagement with the lugs when the stay member is depending and spaced apart from the rails.
  • leg movement control means comprises:
  • the stretcher framework is provided with a pair of parallel longitudinal rails which the stay member engages and depends from, whereby the stay mem* ber is permitted limited movement away from the rails;
  • a cover member is pivotally mounted on the block, the cover member having a pair of cut-out slots for engagement with the lugs, the dimensions of the slots being such that the cover member can only be pivoted out of engagement with the lugs when the stay member is depending and spaced apart from the rails.
  • leg movement control means comprises:
  • the stretcher framework is provided with a pair of parallel longitudinal rails which the stay member engages and depends from, whereby the stay member is permitted limited movement away from the rails;
  • a trolley as recited in claim 12 wherein a handle is provided on each of the rear legs to facilitate movement of the trolley and pivoting of the rear legs.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Invalid Beds And Related Equipment (AREA)
US00174114A 1970-08-24 1971-08-23 Construction of a trolley Expired - Lifetime US3743344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE1110/70A IE34489B1 (en) 1970-08-24 1970-08-24 Trolley

Publications (1)

Publication Number Publication Date
US3743344A true US3743344A (en) 1973-07-03

Family

ID=11022057

Family Applications (1)

Application Number Title Priority Date Filing Date
US00174114A Expired - Lifetime US3743344A (en) 1970-08-24 1971-08-23 Construction of a trolley

Country Status (7)

Country Link
US (1) US3743344A (cs)
CA (1) CA930759A (cs)
DE (1) DE2142187A1 (cs)
FR (1) FR2105938A5 (cs)
GB (1) GB1300368A (cs)
IE (1) IE34489B1 (cs)
NL (1) NL7111645A (cs)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449262A (en) * 1981-09-08 1984-05-22 Siemens Medical Laboratories, Inc. Medical couch incorporating a lifting mechanism
US4534544A (en) * 1982-10-16 1985-08-13 Flexlift Hubgerate GmbH Lift
US4682810A (en) * 1984-10-18 1987-07-28 Contact Securite - Societe d'Exploitation Wheeled stretcher in which the plane on which the patient lies is adaptable in height
US4817220A (en) * 1985-10-24 1989-04-04 A/S Saba Medical Height adjusting mechanism for a physical therapy bench
US5022105A (en) * 1989-08-04 1991-06-11 Michael Catoe Mobile lift-assisted patient transport device for field use
US5495914A (en) * 1993-08-09 1996-03-05 Dimucci; Vito A. Power lifting unit and method for connecting mobile patient transporter
US5697471A (en) * 1993-08-09 1997-12-16 Dimucci; Vito A. Power lifting unit and method for converting mobile patient transporter
US5740884A (en) * 1993-08-09 1998-04-21 Dimucci; Vito A. Power lifting unit and method for converting mobile patient transporter
US5983425A (en) * 1997-03-31 1999-11-16 Dimucci; Vito A. Motor engagement/disengagement mechanism for a power-assisted gurney
US6473922B1 (en) * 1999-09-15 2002-11-05 Sunrise Medical Hhg Inc. Kinematic motion of articulated bed
US20040080172A1 (en) * 2002-10-18 2004-04-29 Mitchell Donald E. Bariatric gurney and process
US20090212535A1 (en) * 2000-09-18 2009-08-27 Darling Iii Charles W Cart transportable mobile medical critical care point of need field installation units
US20100176618A1 (en) * 2004-09-24 2010-07-15 Stryker Corporation In-ambulance cot shut-off device
US20110309601A1 (en) * 2001-08-24 2011-12-22 Darling Iii Charles W Mission adaptable portable cart/utility table arrangement
USRE44884E1 (en) 2004-09-24 2014-05-13 Stryker Corporation Ambulance cot with pinch safety feature
US10959532B2 (en) * 2016-12-30 2021-03-30 Zhejiang Sidoo Electrical Appliances Co., Ltd. Back adjustable electrical bed frame

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2319008A (en) * 1942-05-08 1943-05-11 Charles V Mccormack Carriage truck
US3082016A (en) * 1960-09-28 1963-03-19 William D Pratt Auto cart

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2319008A (en) * 1942-05-08 1943-05-11 Charles V Mccormack Carriage truck
US3082016A (en) * 1960-09-28 1963-03-19 William D Pratt Auto cart

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449262A (en) * 1981-09-08 1984-05-22 Siemens Medical Laboratories, Inc. Medical couch incorporating a lifting mechanism
US4451945A (en) * 1981-09-08 1984-06-05 Siemens Medical Laboratories, Inc. Medical couch
US4534544A (en) * 1982-10-16 1985-08-13 Flexlift Hubgerate GmbH Lift
US4682810A (en) * 1984-10-18 1987-07-28 Contact Securite - Societe d'Exploitation Wheeled stretcher in which the plane on which the patient lies is adaptable in height
US4817220A (en) * 1985-10-24 1989-04-04 A/S Saba Medical Height adjusting mechanism for a physical therapy bench
US5022105A (en) * 1989-08-04 1991-06-11 Michael Catoe Mobile lift-assisted patient transport device for field use
US5495914A (en) * 1993-08-09 1996-03-05 Dimucci; Vito A. Power lifting unit and method for connecting mobile patient transporter
US5697471A (en) * 1993-08-09 1997-12-16 Dimucci; Vito A. Power lifting unit and method for converting mobile patient transporter
US5740884A (en) * 1993-08-09 1998-04-21 Dimucci; Vito A. Power lifting unit and method for converting mobile patient transporter
US5983425A (en) * 1997-03-31 1999-11-16 Dimucci; Vito A. Motor engagement/disengagement mechanism for a power-assisted gurney
US6473922B1 (en) * 1999-09-15 2002-11-05 Sunrise Medical Hhg Inc. Kinematic motion of articulated bed
US20090212535A1 (en) * 2000-09-18 2009-08-27 Darling Iii Charles W Cart transportable mobile medical critical care point of need field installation units
US8505959B2 (en) * 2000-09-18 2013-08-13 Valiant Rock, Llc Cart transportable mobile medical critical care point of need field installation units
US20110309601A1 (en) * 2001-08-24 2011-12-22 Darling Iii Charles W Mission adaptable portable cart/utility table arrangement
US8348301B2 (en) * 2001-08-24 2013-01-08 Valiant Rock, Llc Mission adaptable portable cart/utility table arrangement
US20040080172A1 (en) * 2002-10-18 2004-04-29 Mitchell Donald E. Bariatric gurney and process
US6916056B2 (en) 2002-10-18 2005-07-12 Godby Enterprises, Llc Bariatric gurney and process
US20050225107A1 (en) * 2002-10-18 2005-10-13 Mitchell Donald F Bariatric gurney and process
US7111340B2 (en) 2002-10-18 2006-09-26 Godby Enterprises, Llc Bariatric gurney and process
US20100176618A1 (en) * 2004-09-24 2010-07-15 Stryker Corporation In-ambulance cot shut-off device
US8056950B2 (en) 2004-09-24 2011-11-15 Stryker Corporation In-ambulance cot shut-off device
USRE44884E1 (en) 2004-09-24 2014-05-13 Stryker Corporation Ambulance cot with pinch safety feature
US10959532B2 (en) * 2016-12-30 2021-03-30 Zhejiang Sidoo Electrical Appliances Co., Ltd. Back adjustable electrical bed frame

Also Published As

Publication number Publication date
FR2105938A5 (cs) 1972-04-28
IE34489B1 (en) 1975-05-28
DE2142187A1 (de) 1972-03-02
GB1300368A (en) 1972-12-20
IE34489L (en) 1972-02-24
CA930759A (en) 1973-07-24
NL7111645A (cs) 1972-02-28

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