US1840591A

US1840591A - Lifting device

Info

Publication number: US1840591A
Application number: US305783A
Authority: US
Inventors: Mather Oscar
Original assignee: AMERICAN HOIST CORP
Current assignee: AMERICAN HOIST Corp
Priority date: 1928-09-13
Filing date: 1928-09-13
Publication date: 1932-01-12
Anticipated expiration: 1949-01-12

Description

0. MATHER LIFTING DEVICE Jan. 12, 1932.

Filed Sept. 13, 1928 2 sh eets-sheet smut/"tom Oscar- Matfier Jan. 12, 1932. o. MATHER LIFTING DEVICE Filed Sept. 13. 1928 2 Sheets-Sheet 2 Fig.5

Fig.4

gwtnntov Oscar Nmt'her wumww Patented Jan. 12, 1932 OSCAR MATHER, OF CHATTANCOGA, TEZ'FN'JSQ.

CORPORATION, OF CHATTANOOGA, TENNESSEE, A CORPORATION OF DELAWARE LIFTING DEVICE Application filed September 13, 1928. Serial No. 805,783.

This invention relates to lifting devices and particularly to those devices intended for use in lifting automobiles for the purpose of cleaning, inspection or repair of the under portions thereof.

In the use of automobile lifting devices for use in garages and repair shops it has been found advantageous to lift automobiles in such a way that not only will the under portion be accessible, but that the wheels may turn and be removed if found to be desirable. It has also been found to be desirable to have the lifting means take up as little floor space as possible when the device is not in use.

The primary object of this invention is the provision of an improved lifting device for automobiles.

Another object of this invention is the provision of an automobile lifting device which will exert its lifting force in such a way as to leave all of the Working parts of the automobile including the wheels, available for inspection, cleaning and repair.

Another object of this invention is the provision of an automobile. lifting device which will have its lifting power applied to a single vertical lifting screw and in turn transmitted to a pair of toggle sets to lift the automobile by the combined action of the toggle sets.

Other and further objects of my invention will be apparent to one skilled in the art from a reading of the complete specification anc claims.

Referring to the drawings wherein is illustrated a preferred embodiment of my inven tion, Figure 1 is a perspective view of the invention in partially raised position.

Figure 2 is a perspective view of the invention in the lowest position.

Figure 3 is a detail sectional view at the base of the lifting screw.

Figure 4 is a detail sectional view through the upright support showing the lifting nut and its connections.

Figure 5 is a detail view of the roller connection between the supporting frame and one of the cross members of the lifting device.

Figure 6 is a detail view of the connection at the lower end of one of the cross members of the lifting device.

In the drawings, similar reference characters refer to the same or similar parts throughout the several views of the drawings.

One of the important features of this in vention is the compactness of the device when not performing its lifting function.

On the floor or other solid foundation is placed the supporting means which in the embodiment illustrated are the channel be: ns 10 placed with their flanges upward. l1ese channel beams 10 are placed in parallel relation and at distance apart substantially equal to the distance between the two longitudinal frame members of the average auto mobile. These channel beams are secured at all to another channel member 11. To Batter channel member 11 is secured an upr "ht screw supporting column or frame for the support of the lifting screw to be later described.

This screw supporting frame or column comprises two upright beams as channels 12 having the flanges of each beam, in the embodiment herein illustrated, extending in a direction away from the other beam. This places the webs of each beam toward each other. It is to be noted that these beams are spaced apart to provide a space for the lifting screw and its cooperatin nut to he later described. As the lower ends of these channel beams 12 are two spacer brackets 13. At the top of the channel beams 12 is a cap piece 14 which secures the two beams in proper spaced relation to each other at their tops. I

Secured at the bottom of the channels 12 and to the channel frame member 11 is a gear casing 15. This gear casing 15 is provided in its bottom with any suitable thrust hearing as the ball thrust bearing 16.

Supported by the thrust bearing 16 is the lower end of the screw 17 Above the thrust bearing 16 and lacy-ed to the screw 17 by a key 18 is a worm gear 19. In the side of the worm box is mounted a worm 20 which is supported by a motor shaft 21. On the outer end of he motor shaft 21 is located a motor 22 which motor provides power to operate the screw 17 through the shaft 21, worm 20, worm gear 19 and shaft 17.

members

26, 27 are preferably regard framemembers26f2i7 and'the u l of the" support members 10, respectively. f'Th'e' rear ends of the channel members "30 "er is supplied tot-he motor 2 throughithe shaft '21, Worth 20, gear 19,fd ri ves ,the' screw 1?. {m l ft are he Having screw threaded engagement with the screw .17 is a nut 22 which nut 22 transmits tne lifting force from the screw 17 as will be described. Secured to the nut 22 as bolts and on the front of the channel members 12, is a plate 23 to which are secured the lifting braces or

hangers

24, 25. The

upper hanger or brace is secured on the top of the plate :23 while the lower brace or hanger is secured to the front of theplate 23 b" a clanmin 121 26. The outer ends of both

braces

24, 25 are secured to the frame which prevldes the support for the automo bile when the latter-sisa-beinglifted- This:

frame comprises

side members

26, 27, a front iiieni'be'r'28'and a'rear member 29. The side angle irons an? 1 at the aren'cl-s'ofthese'angle irons that the braces or hangers 24, 25' are secured. "To'supp'o t the frani'e'flfiy fi 28*,29, two tong er parallel motion cross rovidedfa'nd areso constructfed as to "cause the frame to '1112i1nta1n"al3 all times-a bers 10 in' other WOPClS't-O remain horizontal parallel wishes to the support" m em s-of its height:r

c Thesecr'oss members are-each preferably constructed of'two -channelmembers 30', 31, pivotedtogether at 32. Inorder' to'rernforce the pivot point and provide asuflicient bean ing surface forthe pivots '32, blocks 33 have been provided in the spacebetween the '

fiangesofthe channelmembers

30, 31. These blocks fill the space-between the channels and are Suitably secured in place asbyspot Welding' These blocks33 not onlyfp'rovide 'suffe cie'nt'bearing surface for the pivots 32;but

in addition, thevform a reinforcement for the Weakest ""of the channel members.

At theforvvard ends of the channels 3C1, 31ers located rollers 30, 313130 contact with and bef'g 'uided 'in' the iln der surfaces of the surfaces are pivoted atB lftot'he support members 10 andth e rear ends-cf the channel membersiil are pivoted'to the frame members 26, 2?,

respectivelvat 35. The pivot pins 32am so v placed that as the frame 26, 2. 7 28;29 is lifted,

the rollers 30, 3l w ill' roll ntheir respective surfaces and lift-the forward end of the frame, keeping it at the same level as the rear endof the-frame.

In operation' 'electric curr en t orother poi-"- The motor, and worm ""Thescrew 1'7 22" which transmits its lifting force through the plate 23 to the hangers or braces 24, 25' to the framemembers 2-6; 27.

As the'scrervl'z. revelv es the frame is lifted.

In order'fo providea guide for holding the nut steadv' when the screw is operated there is provided a guide member'BG which is own complete support.

, -the automobile so that the ir power turned 02% out interr'uptioh hy p res-er the and that modihc 51 extends arounc. the channel members 12.

It is only necessarv member durin operation" as gleor parallel mot' There is prev 37. This guide 1 me 2 29 will be in proper relation t l the-lifting operation-takes place.

After the autos 1 I 1 ans, tnetion takes place as already describe It i's'to'h-e noted hasbeen raised;:tne the same may pass I cross members 'ncl bel \v,

under L d8? lC; i

I he it 1s desired the power is rever's ing; the direction of re This causes the parts to e or lowered-position;

It is to bc'note parallelfl motion cre's between the 11' members 10, tie any excavati al 1 wt'he g n this construetzoh the l Whole" maybe shifted to any' withont'any pennanconstruction "a D ten. e mining ea -over the I opeilati'oi'i.

Illustrated I v one ma e withoiit depar the inventionand wit pended claims.

Having desc ed claim andfdes 'e'to entis':

1. A liftin'g device prising a flat [group means, a carrying frame gage the underside o as vtoi motion means for frame ontal' secure s raise the the tension member and to the carrying frame and power means for operating the screw.

2. A lifting device for automobiles comprising a flat ground engaging supporting means, a carrying frame having sides to en gage the underside of an automobile, parallel motion means for maintaining the carrying frame horizontal when a lifting force is applied at one portion of the frame to raise the same, and raising means connected at one end of the frame, said raising means including an upright frame at the end of the carrying frame, guides on the upright frame, a screw supported by the frame and parallel with the guides, a nut in cooperative relation with the screw to be lifted thereby and mounted to slide in the guides, a vertical tension member connected to the nut, lifting braces connected to the tension member and to the carrying frame and power means operatively connected to the screw for turning the same.

3. A lifting device for automobiles comprising a supporting means, a carrying frame, a pair of sets of crossed members, the frame being supported by the cross members adjacent their upper ends, the crossed members of each set being pivoted together and pro portioned to cause the frame to maintain a substantially horizontal position when raised, the supporting means and carrying frame having means for maintaining corresponding ends of opposite cross members in spaced relation to each other, the corresponding cross members of the sets, except adjacent to their ends, being separated and free of connections to permit free passage of a mechanic therebetween when the lifting device is in use and means for simultaneously raising the frame and operating the cross members to maintain the frame in substantially horizontal position.

4. A lifting device for automobiles comprising a supporting means, a carrying frame, a pair of sets of crossed members, the frame being supported by the cross members adjacent their upper ends, the cross members of each set being pivoted together and proportioned to cause the frame to maintain a substantially horizontal position when raised, the supporting means and carrying frame having means for maintaining corresponding ends of opposite cross members in spaced relation to each other, the cross members of the sets, except adjacent to their ends, being separated and free of connections to permit free passage of a mechanic therebetween when the lifting device is in use, the supporting means extending side-wise to points beyond the centers of wheel support, and means for simultaneously raising the frame and operating the cross members to maintain the frame in substantially horizontal position.

5. A lifting device for automobiles comprising a supporting means, a carrying frame, a pair of sets of crossed members, the frame being supported by the cross members adjacent their upper ends, the cross members of each set being pivoted together and proportioned to cause the frame to maintain a substantially horizontal position when raised, the supporting means and carrying frame having means for maintaining corresponding ends of opposite cross members in spaced relation to each other, the cross members of the sets, except adjacent to their ends, being separated and free of connections to permit free passage of a mechanic therebetween when the lifting device is in use, the width of the carrying frame being less than the distance between the automobile wheels, the frame having spaced side rails to permit access to the underside of the automobile and means for simultaneously raising the frame and operating the cross members to maintain the frame in substantially horizontal position.

6. A lifting device for automobiles comprising a supporting means, a carrying frame, a pair of sets of crossed members, the frame being supported by the cross members adjacent their up er ends, the cross members of each set being pivoted together and proportioned to cause the frame to maintain a substantially horizontal position when raised, the supporting means and carrying frame having means for maintaining corresponding ends of opposite cross members in spaced relation to each other, the corresponding cross members of the sets, except adjacent to their ends, being separated and free of connections to permit free passage of a mechanic therebetween when the lifting device is in use, a mast at one end of the lifting device and a screw means for simultaneously raising the frame and operating the cross members to maintain the frame in substantially horizontal position.

In testimony whereof I hereunto aflix my signature.

OSCAR MATHER.