US3102713A - Transportable elevators and particularly to car lifters - Google Patents

Transportable elevators and particularly to car lifters Download PDF

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Publication number
US3102713A
US3102713A US91140A US9114061A US3102713A US 3102713 A US3102713 A US 3102713A US 91140 A US91140 A US 91140A US 9114061 A US9114061 A US 9114061A US 3102713 A US3102713 A US 3102713A
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Prior art keywords
levers
base
upper frame
transportable
pair
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US91140A
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Paoli Giovanni De
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K P ENGINEERING CORP Ltd
Kp Engineering Corp Ltd
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K P ENGINEERING CORP Ltd
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    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0625—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement with wheels for moving around the floor
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0641—Single levers, e.g. parallel links
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0691—Asymmetric linkages, i.e. Y-configuration
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated

Definitions

  • This invention relates to mobile lifting devices and more particularly to improvements in the mechanical assembly of transportable lifting means designed to lift a motor vehicle to a required height in order to provide access tothe lowest parts of the chassis and the motor of the vehicle.
  • FIGURES l, 2 and 3 show a side view of an embodiment of a transportable elevator or lift in a raised, an intermediate and a lowered position respectively;
  • FIGURE 4 shows details of FIGURES l, 2 and 3.
  • the lifting means includes: a framework or base ll) mounted on four wheels 12 and 14, a pair of which at least are adjustable; and two pairs of parallel levers 16 and 18 connected to opposite sides of base ltl. It should be noted that only the pairs of levers is shown on the side represented in the drawing; it is however clear that they are coupled levers, the symmetrical pairs being on the side of the elevator which cannot be seen.
  • Each of the levers 16 are of L shape having an end 16a arranged perpendicular to the remainder of the lever.
  • Lever 16a is connected at the end thereof to the end or" an arm 29a of one of a pair of three arm levers 2G.
  • the arm 2% of lever 20 is connected to the end of the corresponding lever 18 while the third arm Ztlc is connected, at point 22, to the upper frame 24.
  • the pairs of levers 16, 18 and 20, connected to the base lit and upper frame 24 and connected also to one another, together with the hydraulic plunger 26 supplying the raising power, represent the supporting structure of upper frame 24.
  • the free end of cylinder 26a is connected at a point 30 to a transversal support of the base 10.
  • plunger 26 The connection of plunger 26 to the lever system is shown in FIGURE 7, wherein the upper end of plunger 26 is supplied with a bushing through which passes transversal bar 28, that is, a hub linking the pairs of levers 20 to the plunger 26.
  • the interior faces of the levers 20 have two cylindrical projections 28A, with through holes to accommodate the bar 29.
  • Clamping means (not shown) are provided to prevent bar 28 from sliding out.
  • angular levers 36, 36A are connected through bar 29.
  • a pair of tension rods 32 is connected at point 16 to the pair of levers 16; the free end of each tension rod 32 being connected at point 34 to an angular lever 36, 36a.
  • the pair of angular levers 36, 36a are pivotally connected to the bar 29, their free ends being provided with sliding rollers 36b guided in button-hole shaped openings 24a located in the side members of the upper frame 24.
  • the arrangement is such that the elevator, when starting from a wholly lowered position (see FIG. 3) operates as follows:
  • the hydraulic plunger 26, 26a in a rest position is almost parallel to the base 10 While the upper frame 24 is slightly tilted towards the portion 26 of the plunger 26, 26a to make the loading operations of the motor vehicle or of any other mass on the upper frame 24 easier.
  • FIG. 3 it is clearly shown that, when the elevator is in a lowered position, the alignment of the point 39 and hub 28 of the hydraulic plunger 26, 26a do not pass through the axis of the point 22 of the levers 20, 200. Such a disposition avoids any jamming in the initial raising phase.
  • the thrust supplied by the hydraulic plunger 26, 26a operated by a motor pump or by hand, generates a vertical component P causing the articulated levers to open, whilst the upper frame 24 is lifted.
  • the movement of the tension rod 32, and the levers 36-36a and the shape of the opening 24a engaged by the rollers 36b keep the upper frame 24 in a constant parallel position with respect to the base 10.
  • the elevator under the influence of thrust P, passes from the position represented by FIG. 3 to the position of FIG. 2 and finally to the position shown by FIG. 1.
  • the weight supported on upper frame 24 is carried by the articulations A, B, C, D, which in the final raising phase are ideally placed at the top of an irregular pyramid modifying its angles during the raising, so as to confer the highest stability to the elevator.
  • the end 16a of L-shaped levers 16 and the arms 20a of the levers 2%) free their articulations D from the alignment of the points where power is applied in its initial raising phase (FIG. 3) allowing upper frame 24 to be lowered as far down as base 10, which is very important with regard to the loading operations.
  • the apparatus is completed by suitable arms 38, the heads of which can be engaged in the side members of the up er frame 24 together with a particular device for the spring suspension of the base It ⁇ and consequently of the complete elevator with respect to at least the pair of wheels 14.
  • the end of the plunger 42a is connected at point 54 to the lever 52 and not directly to the foot 40a of the bracket 46), so as to reduce the length of the cylinder 42 and of its plunger 42a, this allowing to reduce the raising effort, within certain limits of course.
  • the main object in view has been to provide a lifting means which is both strong and efilcient and can be easily transported.
  • a transportable elevator comprising an upper frame, a base, a hydraulic plunger, 21 pair of three armed levers including upper, middle and lower arms, means for pivot- :ably connecting said upper arms to said upper frame, pivot means on said upper arms, means for connecting one end oi said hydraulic plunger to said pivot means, a pair of right angle levers including ends at right angles to each other, means for pivotably connecting one of the ends of each of said right angle levers to said base, means for pivota'bly connecting the other ends of said right angle levers to the middle arms respectively of each of said three armed levers, means for pivotably connecting the lower arms of said three armed levers to said base, and
  • V j 3 means for pivotably connecting the other end of said hydraulic plunger to said base.
  • the elevator of claim 1 including a pair of angular levers including first and second ends, first means for pivotably connecting the first ends of said angular levers to said upper frame, and means for pivotably connecting said angular levers respectively to said three armed levers.
  • the elevator of claim 2 including slots in said upper frame and wherein said first means are sliding rollers fitted in said slots and connected to the first ends of said angular levers.
  • the elevator of claim 2 including a pair of tension 4- rods for pivotably connecting the second ends of said angular levers to said right angle levers respectively.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Handcart (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

G. DE PAOLI Sept. 3, 1963 TRANSPORTABLE ELEVATORS AND PARTICULARLY TO CAR LIFTERS Filed Feb. 25, 1961 United States Patent 3,102,713 TRANSPORTABLE ELEVATORS AND PARTICU- LARLY T0 CAR LIFTERS Giovanni De Paoli, Grugliasco, Italy, assignor to Engineering Corporation, Limited, Nassau, New PI'OVI- dence, Bahamas Filed Feb. 23, 1961, Ser. No. 91,140 Claims priority, application Italy Feb. 27, 1960 4 Claims. (Cl. 254- 8) This invention relates to mobile lifting devices and more particularly to improvements in the mechanical assembly of transportable lifting means designed to lift a motor vehicle to a required height in order to provide access tothe lowest parts of the chassis and the motor of the vehicle.
Other objects, features and advantages of the invention will be apparent from the following detailed description when read with the accompanying drawings which show an exemplary embodiment of the invention and wherein:
FIGURES l, 2 and 3 show a side view of an embodiment of a transportable elevator or lift in a raised, an intermediate and a lowered position respectively; and
FIGURE 4 shows details of FIGURES l, 2 and 3.
The lifting means includes: a framework or base ll) mounted on four wheels 12 and 14, a pair of which at least are adjustable; and two pairs of parallel levers 16 and 18 connected to opposite sides of base ltl. It should be noted that only the pairs of levers is shown on the side represented in the drawing; it is however clear that they are coupled levers, the symmetrical pairs being on the side of the elevator which cannot be seen.
Each of the levers 16 are of L shape having an end 16a arranged perpendicular to the remainder of the lever. Lever 16a is connected at the end thereof to the end or" an arm 29a of one of a pair of three arm levers 2G. The arm 2% of lever 20 is connected to the end of the corresponding lever 18 while the third arm Ztlc is connected, at point 22, to the upper frame 24. The pairs of levers 16, 18 and 20, connected to the base lit and upper frame 24 and connected also to one another, together with the hydraulic plunger 26 supplying the raising power, represent the supporting structure of upper frame 24. The free end of cylinder 26a is connected at a point 30 to a transversal support of the base 10. The connection of plunger 26 to the lever system is shown in FIGURE 7, wherein the upper end of plunger 26 is supplied with a bushing through which passes transversal bar 28, that is, a hub linking the pairs of levers 20 to the plunger 26. The interior faces of the levers 20 have two cylindrical projections 28A, with through holes to accommodate the bar 29. Clamping means (not shown) are provided to prevent bar 28 from sliding out. At a short distance from the bar 28, on the levers 20', angular levers 36, 36A are connected through bar 29.
A pair of tension rods 32 is connected at point 16 to the pair of levers 16; the free end of each tension rod 32 being connected at point 34 to an angular lever 36, 36a. The pair of angular levers 36, 36a are pivotally connected to the bar 29, their free ends being provided with sliding rollers 36b guided in button-hole shaped openings 24a located in the side members of the upper frame 24. The arrangement is such that the elevator, when starting from a wholly lowered position (see FIG. 3) operates as follows:
The hydraulic plunger 26, 26a in a rest position is almost parallel to the base 10 While the upper frame 24 is slightly tilted towards the portion 26 of the plunger 26, 26a to make the loading operations of the motor vehicle or of any other mass on the upper frame 24 easier. In FIG. 3 it is clearly shown that, when the elevator is in a lowered position, the alignment of the point 39 and hub 28 of the hydraulic plunger 26, 26a do not pass through the axis of the point 22 of the levers 20, 200. Such a disposition avoids any jamming in the initial raising phase. The thrust supplied by the hydraulic plunger 26, 26a, operated by a motor pump or by hand, generates a vertical component P causing the articulated levers to open, whilst the upper frame 24 is lifted. The movement of the tension rod 32, and the levers 36-36a and the shape of the opening 24a engaged by the rollers 36b keep the upper frame 24 in a constant parallel position with respect to the base 10. The elevator, under the influence of thrust P, passes from the position represented by FIG. 3 to the position of FIG. 2 and finally to the position shown by FIG. 1. The weight supported on upper frame 24 is carried by the articulations A, B, C, D, which in the final raising phase are ideally placed at the top of an irregular pyramid modifying its angles during the raising, so as to confer the highest stability to the elevator. The end 16a of L-shaped levers 16 and the arms 20a of the levers 2%) free their articulations D from the alignment of the points where power is applied in its initial raising phase (FIG. 3) allowing upper frame 24 to be lowered as far down as base 10, which is very important with regard to the loading operations.
The apparatus is completed by suitable arms 38, the heads of which can be engaged in the side members of the up er frame 24 together with a particular device for the spring suspension of the base It} and consequently of the complete elevator with respect to at least the pair of wheels 14.
The end of the plunger 42a is connected at point 54 to the lever 52 and not directly to the foot 40a of the bracket 46), so as to reduce the length of the cylinder 42 and of its plunger 42a, this allowing to reduce the raising effort, within certain limits of course.
In the embodiment described and illustrated the main object in view has been to provide a lifting means which is both strong and efilcient and can be easily transported.
Of course while the practical construciton of the elevators in question can be slightly modified, it cannot depart from the nature of the present invention as defined in the claims.
What is claimed is:
l. A transportable elevator comprising an upper frame, a base, a hydraulic plunger, 21 pair of three armed levers including upper, middle and lower arms, means for pivot- :ably connecting said upper arms to said upper frame, pivot means on said upper arms, means for connecting one end oi said hydraulic plunger to said pivot means, a pair of right angle levers including ends at right angles to each other, means for pivotably connecting one of the ends of each of said right angle levers to said base, means for pivota'bly connecting the other ends of said right angle levers to the middle arms respectively of each of said three armed levers, means for pivotably connecting the lower arms of said three armed levers to said base, and
V j 3 means for pivotably connecting the other end of said hydraulic plunger to said base.
2. The elevator of claim 1 including a pair of angular levers including first and second ends, first means for pivotably connecting the first ends of said angular levers to said upper frame, and means for pivotably connecting said angular levers respectively to said three armed levers.
3. The elevator of claim 2 including slots in said upper frame and wherein said first means are sliding rollers fitted in said slots and connected to the first ends of said angular levers.
4. The elevator of claim 2 including a pair of tension 4- rods for pivotably connecting the second ends of said angular levers to said right angle levers respectively.
References Cited in the file of this patent UNITED STATES PATENTS 2,613,822 Stanley Oct. 14, 1952 2,706,102 Oresci Apr. 12, 1955 2,766,007 Krilanovich Oct. 9, 1956 2,785,807 Prowinsky Mar. 19, 1957 2,998,224 Reisig Aug. 29, 1961

Claims (1)

1. A TRANSPORTABLE ELEVATOR COMPRISING AN UPPER FRAME, A BASE, A HYDRAULIC PLUNGER, A PAIR OF THREE ARMED LEVERS INCLUDING UPPER, MIDDLE AND LOWER ARMS, MEANS FOR PIVOTABLY CONNECTING SAID UPPER ARMS TO SAID UPPER FRAME, PIVOT MEANS ON SAID UPPER ARMS, MEANS FOR CONNECTING ONE END OF SAID HYDRAULIC PLUNGER TO SAID PIVOT MEANS, A PAIR OF RIGHT ANGLE LEVERS INCLUDING ENDS AT RIGHT ANGLES TO EACH OTHER, MEANS FOR PIVOTABLY CONNECTING ONE OF THE ENDS OF EACH OF SAID RIGHT ANGLE LEVERS TO SAID BASE, MEANS FOR PIVOTABLY CONNECTING THE OTHER ENDS OF SAID RIGHT ANGLE LEVERS TO THE MIDDLE ARMS RESPECTIVELY OF EACH OF SAID THREE ARMED LEVERS, MEANS FOR PIVOTABLY CONNECTING THE LOWER ARMS OF SAID THREE ARMED LEVERS TO SAID BASE, AND MEANS FOR PIVOTABLY CONNECTING THE OTHER END OF SAID HYDRAULIC PLUNGER TO SAID BASE.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090283733A1 (en) * 2008-05-14 2009-11-19 Daniel Lyashevskiy Safety jack system
US20180311091A1 (en) * 2015-10-23 2018-11-01 Pride Mobility Products Corp. Lifting Mechanism

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613822A (en) * 1949-12-08 1952-10-14 Stanley Aviation Corp Weapons handling unit
US2706102A (en) * 1951-06-06 1955-04-12 Anthony L Cresci Lifting mechanism for truck body
US2766007A (en) * 1951-08-14 1956-10-09 Krilanovich Steve Camera hoist
US2785807A (en) * 1953-02-03 1957-03-19 Joseph H Prowinsky Straight line lift truck
US2998224A (en) * 1958-08-08 1961-08-29 Leopold F Reisig End lift

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613822A (en) * 1949-12-08 1952-10-14 Stanley Aviation Corp Weapons handling unit
US2706102A (en) * 1951-06-06 1955-04-12 Anthony L Cresci Lifting mechanism for truck body
US2766007A (en) * 1951-08-14 1956-10-09 Krilanovich Steve Camera hoist
US2785807A (en) * 1953-02-03 1957-03-19 Joseph H Prowinsky Straight line lift truck
US2998224A (en) * 1958-08-08 1961-08-29 Leopold F Reisig End lift

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090283733A1 (en) * 2008-05-14 2009-11-19 Daniel Lyashevskiy Safety jack system
US20180311091A1 (en) * 2015-10-23 2018-11-01 Pride Mobility Products Corp. Lifting Mechanism
US10835429B2 (en) * 2015-10-23 2020-11-17 Pride Mobility Products Corporation Lifting mechanism

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