GB2176458A - Vehicle jacks - Google Patents

Vehicle jacks Download PDF

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Publication number
GB2176458A
GB2176458A GB08511929A GB8511929A GB2176458A GB 2176458 A GB2176458 A GB 2176458A GB 08511929 A GB08511929 A GB 08511929A GB 8511929 A GB8511929 A GB 8511929A GB 2176458 A GB2176458 A GB 2176458A
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GB
United Kingdom
Prior art keywords
track
load
axis
foot
support element
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.)
Granted
Application number
GB08511929A
Other versions
GB2176458B (en
GB8511929D0 (en
Inventor
Eric Benjamin Cove
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.)
Metallifacture Ltd
Original Assignee
Metallifacture 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 Metallifacture Ltd filed Critical Metallifacture Ltd
Priority to GB8511929A priority Critical patent/GB2176458B/en
Publication of GB8511929D0 publication Critical patent/GB8511929D0/en
Publication of GB2176458A publication Critical patent/GB2176458A/en
Application granted granted Critical
Publication of GB2176458B publication Critical patent/GB2176458B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/12—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated comprising toggle levers

Abstract

A jack comprising first and second pivotally interconnected elongate members 11, 13, a base element 12 at an end of the first member, a load-support element 40 at an end of the second member, and a screw 20 connected between the members for pivotally adjusting their relative angular positions for raising and lowering the load-support element relative to the base element, wherein at least one of the base element and the load-support element is angularly movable relative to its respective member by means of an arcuate track 35, 50 and a formation engaged with the track and provided one on the element and the other on the member, the axis of the track being parallel to the axis of the pivotal interconnection between the members and located between the track and the pivotal connection. <IMAGE>

Description

SPECIFICATION Vehicle jacks This invention relates to vehicle jacks.
The present invention provides a jack comprising first and second pivotally interconnected elongate members, a foot at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising or lowering the loadsupport element relative to the foot, wherein the second member and the load-support element have an arcuate track, and a formation engaged with the track, respectively, the arc having an axis parallel to the axis of the pivotal connection with the first member and located between the track and the pivotal connection, the load-support element being angularly movable about said axis of the arc relative to the second member by means of said track.
The invention may reside in a jack comprising first and second pivotally interconnected elongate members, a foot at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising or lowering the loadsupport element relative to the foot, wherein the first member and the foot have an arcuate track and a formation engaged with the track, respectively, the axis of the arc being parallel to the axis of the pivotal connection with the second member and located between the track and the pivotal connection, the first member being pivotally movable about the axis of the arc relative to the foot by means of said track.
Reference is now made to the accompanying drawings, wherein the sole Figure is a side view of a jack according to the invention.
The jack comprises a first member defining a leg 11, which is of channel form. The leg is supported at one end by a foot 12. A second member, also of channel form, defines an arm 13 and is received at one end within the channel of the leg 11. The arm is pivotally connected to the leg by a pivot pin 14 at a location between the ends of the leg and nearer to the top of the leg than to the foot 12.
The top edges of the channel sides of the leg have slots 16 which rotatably receive trunnions 17 on a nut 18, so that the nut is angularly movable about the axis of the trunnions, parallel to the axis of the pivot pin 14. A screw 20 is screw-engaged with the nut and terminates at one end in a thrust bearing arrangement 21. The shank of the screw adjacent to the bearing arrangement extends transversely through a pivot member 22 and a shoulder 23 co-acts with the thrust bearing to fix the screw relative to the pivot member. The pivot member is rotatably engaged in the channel sides of the arm 13 about an axis parallel to the axes of the pivot pin 14 and the trunnions 17. The opposite end of the screw has a handle 25 pivotally connected thereto for manually rotating the screw.
The upper end of the arm 13, opposite to the pivot pin 14, is provided with a track 30. The track is formed of sheet metal and is arcuate. The track has a continuous arcuate bottom surface 31, stop portions 32, 33 at the ends of the bottom surface, and arcuate top portions 34, 35 adjacent the stop portions and co/ axial with the bottom surface 31. The axis 36 of the track is parallel to the axis of the pivot pin 14 and is located between the track and the pivot pin 14.
A load-support element 40 has a channel-shaped support part 42, for engaging with a body seam of a vehicle, and a guide part 42. The guide part is arcuate and complementary to the track 30 and is held captive between the bottom surface 31 and the top portions 34, 35.
In operation, the screw 20 can be rotated to raise the arm 13 pivotally in conventional manner so as to lift a vehicle whose seam is engaged with the load-support element 40. As the vehicle is lifted, there is angular movement between the element 40 and the track 30, fixed to the arm 13. This movement is controlled by frictional resistance between the guide part 42 and the track 30 and the movement is restricted by the stops 32, 33. This ensures stability of the jack, whilst the movement relative to the vehicle reduces the risk of damage to the vehicle.
To ensure that the frictional resistance is not too high and to facilitate manufacture, the load-support element 40 may be a one-piece plastics moulding.
The bottom of the leg 11 is provided with a second track 50 of similar construction to the first track 30. The foot 12 comprises a base portion 55, with a ridged bottom surface 56 for good grip, and a guide portion 57. The guide portion is arcuate, complementary to the second track 50 and engaged in the latter. The axis of the guide portion and the second track is between the pivot pin 14 and the second track. The foot may also be a onepiece plastics moulding.
In use, as the screw 20 is turned for raising a vehicle, the leg 11 approaches a vertical position and this is permitted, by movement of the track relative to the foot, without any rocking movement of the foot. This reduces the risk of slippage of the foot, whilst the pivotal movement is controlled by frictional resistance and limited by stops 58, 59 at the ends of the second track 50.
1. A jack comprising first and second pivotally interconnected elongate members, a base element at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising and lowering the load/ support element relative to the base eiement, wherein at least one of the base element and the load-support element is angularly movable relative to its respective member by means of an arcuate track and a formation engaged with the track and provided one on the element and the other on the member, the axis of
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Vehicle jacks This invention relates to vehicle jacks. The present invention provides a jack comprising first and second pivotally interconnected elongate members, a foot at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising or lowering the loadsupport element relative to the foot, wherein the second member and the load-support element have an arcuate track, and a formation engaged with the track, respectively, the arc having an axis parallel to the axis of the pivotal connection with the first member and located between the track and the pivotal connection, the load-support element being angularly movable about said axis of the arc relative to the second member by means of said track. The invention may reside in a jack comprising first and second pivotally interconnected elongate members, a foot at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising or lowering the loadsupport element relative to the foot, wherein the first member and the foot have an arcuate track and a formation engaged with the track, respectively, the axis of the arc being parallel to the axis of the pivotal connection with the second member and located between the track and the pivotal connection, the first member being pivotally movable about the axis of the arc relative to the foot by means of said track. Reference is now made to the accompanying drawings, wherein the sole Figure is a side view of a jack according to the invention. The jack comprises a first member defining a leg 11, which is of channel form. The leg is supported at one end by a foot 12. A second member, also of channel form, defines an arm 13 and is received at one end within the channel of the leg 11. The arm is pivotally connected to the leg by a pivot pin 14 at a location between the ends of the leg and nearer to the top of the leg than to the foot 12. The top edges of the channel sides of the leg have slots 16 which rotatably receive trunnions 17 on a nut 18, so that the nut is angularly movable about the axis of the trunnions, parallel to the axis of the pivot pin 14. A screw 20 is screw-engaged with the nut and terminates at one end in a thrust bearing arrangement 21. The shank of the screw adjacent to the bearing arrangement extends transversely through a pivot member 22 and a shoulder 23 co-acts with the thrust bearing to fix the screw relative to the pivot member. The pivot member is rotatably engaged in the channel sides of the arm 13 about an axis parallel to the axes of the pivot pin 14 and the trunnions 17. The opposite end of the screw has a handle 25 pivotally connected thereto for manually rotating the screw. The upper end of the arm 13, opposite to the pivot pin 14, is provided with a track 30. The track is formed of sheet metal and is arcuate. The track has a continuous arcuate bottom surface 31, stop portions 32, 33 at the ends of the bottom surface, and arcuate top portions 34, 35 adjacent the stop portions and co/ axial with the bottom surface 31. The axis 36 of the track is parallel to the axis of the pivot pin 14 and is located between the track and the pivot pin 14. A load-support element 40 has a channel-shaped support part 42, for engaging with a body seam of a vehicle, and a guide part 42. The guide part is arcuate and complementary to the track 30 and is held captive between the bottom surface 31 and the top portions 34, 35. In operation, the screw 20 can be rotated to raise the arm 13 pivotally in conventional manner so as to lift a vehicle whose seam is engaged with the load-support element 40. As the vehicle is lifted, there is angular movement between the element 40 and the track 30, fixed to the arm 13. This movement is controlled by frictional resistance between the guide part 42 and the track 30 and the movement is restricted by the stops 32, 33. This ensures stability of the jack, whilst the movement relative to the vehicle reduces the risk of damage to the vehicle. To ensure that the frictional resistance is not too high and to facilitate manufacture, the load-support element 40 may be a one-piece plastics moulding. The bottom of the leg 11 is provided with a second track 50 of similar construction to the first track 30. The foot 12 comprises a base portion 55, with a ridged bottom surface 56 for good grip, and a guide portion 57. The guide portion is arcuate, complementary to the second track 50 and engaged in the latter. The axis of the guide portion and the second track is between the pivot pin 14 and the second track. The foot may also be a onepiece plastics moulding. In use, as the screw 20 is turned for raising a vehicle, the leg 11 approaches a vertical position and this is permitted, by movement of the track relative to the foot, without any rocking movement of the foot. This reduces the risk of slippage of the foot, whilst the pivotal movement is controlled by frictional resistance and limited by stops 58, 59 at the ends of the second track 50. CLAIMS 1. A jack comprising first and second pivotally interconnected elongate members, a base element at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising and lowering the load/ support element relative to the base eiement, wherein at least one of the base element and the load-support element is angularly movable relative to its respective member by means of an arcuate track and a formation engaged with the track and provided one on the element and the other on the member, the axis of the track being parallel to the axis of the pivotal interconnection between the members and located between the track and the pivotal connection. 2. A jack comprising first and second pivotally interconnected elongate members, a foot at an end of the first member, a load/ support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising or lowering the load-support element relative to the foot, wherein the second member and the load-support element have an arcuate track, and a formation engaged with the track, respectively, the arc having an axis parallel to the axis of the pivotal connection with the first member and located between the track and the pivotal connection, the load/ support element being angularly movable about said axis of the arc relative to the second member by means of said track. 3. A jack comprising first and second pivotally interconnected elongate members, a foot at an end of the first member, a load/ support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising or lowering the load/ support element relative to the foot, wherein the first member and the foot have an arcuate track and a formation engaged with the track, respectively, the axis of the arc being parallel to the axis of the pivotal connection with the second member and located between the track and the pivotal connection, the first member being pivotally movable about the axis of the arc relative to the foot by means of said track. Amendments to the claims have been filed, and have the following effect: (a) Claims 1-3 above have been deleted or textually amended. (b) New or textually amended claims have been filed as follows:
1. A vehicle jack comprising first and second pivotally interconnected elongate members, a base element at an end of the first member, a load-support element at an end of the second member, and a screw connected between the members for pivotally adjusting their relative angular positions for raising and lowering the load-support element relative to the base element, wherein at least one of the load-support element and the base element is angularly movable relative to the respective member, the jack including a convex arcuate track and by a concave formation engaged with the track and slidable therealong and provided one on the element and the other on the member to provide for said relative angular movement; the axis of the track being parallel to the axis of the pivotal connection between the members and located between the track and the pivotal connection.
2. A vehicle jack according to Claim 1 wherein the track is a metal pressing of arcuate form with the portions cranked to define end pockets and said formation has end portioris constrained within said pockets.
3. A vehicle jack according to Claim 1 or 2, wherein the load-support element is guided along a track on the second member and the load-support element is a plastics moulding having a block portion integral with the concave formation.
4. A vehicle jack according to Claim 3, wherein the block portion has a channel shaped to conform to a vehicle body seam.
5. A vehicle jack according to any preceding claim wherein the first support member is guided along a track on the base element and the base element is a plastics moulding having a groundengaging portion integral with the concave formation.
6. A vehicle jack according to Claim 5, wherein the ground-engaging portion has a planar bottom surface provided with gripping projections.
7. A vehicle jack constructed substantially as herein described with reference to the accompanying drawings.
GB8511929A 1985-05-10 1985-05-10 Vehicle jack Expired GB2176458B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8511929A GB2176458B (en) 1985-05-10 1985-05-10 Vehicle jack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8511929A GB2176458B (en) 1985-05-10 1985-05-10 Vehicle jack

Publications (3)

Publication Number Publication Date
GB8511929D0 GB8511929D0 (en) 1985-06-19
GB2176458A true GB2176458A (en) 1986-12-31
GB2176458B GB2176458B (en) 1989-07-05

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327484A1 (en) * 1988-01-18 1989-08-09 Batz, S. Coop. Ltda. Car jack
FR2652343A1 (en) * 1989-09-28 1991-03-29 Rousseau Jean Lifting device for vehicle chassis
EP0440348A1 (en) * 1990-02-01 1991-08-07 Metallifacture Limited Vehicle jack
EP0443383A1 (en) * 1990-02-21 1991-08-28 AUGUST BILSTEIN GMBH &amp; CO. KG Jack
EP0565801A1 (en) * 1992-04-14 1993-10-20 E.P.I., EUROPEENNE DE PARTICIPATIONS INDUSTRIELLE, Société Anonyme Vehicle jack
EP0734996A1 (en) * 1995-03-31 1996-10-02 Bowden France S.A. Easy assembly vehicle jack
EP0749936A2 (en) * 1995-06-20 1996-12-27 August Bilstein GmbH Vehicle jack
ES2115474A1 (en) * 1994-11-10 1998-06-16 Iriarte Luis Jesus Arbeola Support with tilting rest for vehicle lifting jacks
ES2129311A1 (en) * 1996-01-22 1999-06-01 Batz S Coop Ltada Jack for vehicles

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB219248A (en) * 1924-01-29 1924-07-24 Samuel Ryan Improvements relating to the jacking up of vehicles
GB783810A (en) * 1955-05-25 1957-10-02 Vauxhall Motors Ltd Improved jack for motor vehicles
GB1227715A (en) * 1969-01-17 1971-04-07
GB1551256A (en) * 1976-12-31 1979-08-30 Lake & Elliot Jacks & Equipmen Scissors jack
GB2036690A (en) * 1978-12-01 1980-07-02 Storz E Kg Car jack
GB2114537A (en) * 1982-02-01 1983-08-24 Kenneth Carter Motor vehicle jack

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB219248A (en) * 1924-01-29 1924-07-24 Samuel Ryan Improvements relating to the jacking up of vehicles
GB783810A (en) * 1955-05-25 1957-10-02 Vauxhall Motors Ltd Improved jack for motor vehicles
GB1227715A (en) * 1969-01-17 1971-04-07
GB1551256A (en) * 1976-12-31 1979-08-30 Lake & Elliot Jacks & Equipmen Scissors jack
GB2036690A (en) * 1978-12-01 1980-07-02 Storz E Kg Car jack
GB2114537A (en) * 1982-02-01 1983-08-24 Kenneth Carter Motor vehicle jack

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327484A1 (en) * 1988-01-18 1989-08-09 Batz, S. Coop. Ltda. Car jack
FR2652343A1 (en) * 1989-09-28 1991-03-29 Rousseau Jean Lifting device for vehicle chassis
GB2240536B (en) * 1990-02-01 1994-01-19 Metallifacture Ltd Vehicle jack
EP0440348A1 (en) * 1990-02-01 1991-08-07 Metallifacture Limited Vehicle jack
GB2240536A (en) * 1990-02-01 1991-08-07 Metallifacture Ltd Vehicle jack
TR25617A (en) * 1990-02-01 1993-07-01 Metallifacture Ltd KIKSUS KRIKO.
EP0443383A1 (en) * 1990-02-21 1991-08-28 AUGUST BILSTEIN GMBH &amp; CO. KG Jack
EP0565801A1 (en) * 1992-04-14 1993-10-20 E.P.I., EUROPEENNE DE PARTICIPATIONS INDUSTRIELLE, Société Anonyme Vehicle jack
ES2115474A1 (en) * 1994-11-10 1998-06-16 Iriarte Luis Jesus Arbeola Support with tilting rest for vehicle lifting jacks
EP0734996A1 (en) * 1995-03-31 1996-10-02 Bowden France S.A. Easy assembly vehicle jack
FR2732325A1 (en) * 1995-03-31 1996-10-04 Systemes Blg VEHICLE JACK WITH SIMPLIFIED ASSEMBLY
EP0749936A2 (en) * 1995-06-20 1996-12-27 August Bilstein GmbH Vehicle jack
EP0749936A3 (en) * 1995-06-20 1999-04-07 Krupp Bilstein GmbH Vehicle jack
ES2129311A1 (en) * 1996-01-22 1999-06-01 Batz S Coop Ltada Jack for vehicles

Also Published As

Publication number Publication date
GB2176458B (en) 1989-07-05
GB8511929D0 (en) 1985-06-19

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010510