US1975729A - Hoist attachment - Google Patents

Description

Oct. 2, 1934. H. s. MULHOLLEN 1,975,729

HOIST ATTACHMENT Filed March 24, 1934 INVENTOR HAROLD STEPHEN MULHOLLEN PIES- Q KWMM ATTORNEY Patented Oct. 2, 1934 UNITED STATES 1,975,729 nols'r ATTACHMENT,

Harold Stephen Mulhollen, Los Angeles, Calif.

Application March 24,

8 Claims.

This invention relates to an attachment for a hoist of a character used in elevating automobiles for making accessible the under part for greasing and servicing. Such hoists commonly comprise a frame for engagement with the underpart of the automobile so as to be clear of the wheels together with some mechanism to raise the frame, as for illustration a hydraulic jack. With the advent of independently sprung wheels of various constructions and in some cases elimination of an axle extending across the automobile frame between wheels, the problem has arisen of engaging the automobile so as to allow clearance of the particular spring mechanisms and steering mechanisms, so that the latter will not be damaged.

The present invention has for its object the provision of a hoist attachment whereby the automobile may be supported on a hoist under variable conditions-of clearance and comprehends a cross plate together with hoist blocks which may be placed on the cross plate adjusted as to position longitudinally thereon and turned to present different heights of the car engaging surface for supporting the car. ,In addition to the broader objects of this invention there are certain details of structure contributing to ease of manipulation by the operator, simplicity, strength and economy of manufacture.

These objects are accomplished by the embodiment of my invention illustrated inthe accompanying drawing, in which: I

Fig. 1 is a perspective View of a fragment of a v hoist with my attachment shown position thereon; Fig. 2 is a fragmentary front elevational view of a hoist with the attachment supporting an axle which may have independently sprung wheels, not shown, the hoist blocks being in high position; Fig. 3 is a fragmentary front elevational view of a hoist with the blocks in low position supporting an axle of a conventional type; and Fig. 4 is a transverse section through a block.

A conventional type of hoist is shown comprising a hydraulic plunger 5. Secured to the head of plunger 5 is a cross plate 6 to which parallel lift beams 7 are secured. The spacing of beams 7 is such that a car may be driven over the hoist frame and the beams will lie within the space betweenopposite wheels. A base plate 8 spans Ethe beams 7 and overhangs the latter.

The particular base plate shown has curbs 9 preferably welded thereto, these curbs having interruptions on opposite sides adjacent the center for convenience of access to parts and clearance of parts in moving a car into position 1934, Serial No. 717,208 (o1; 254-89) thereover. A hand hole 10 is also provided for access to parts of the car. The plate is slidably held on the beams by guide blocks 11 provided with lips hooking under the lift beams. Thus, the" base plate may be adjustably positioned along the beams.

,The present inventive feature resides in hoistblocks 12 which are unattached to the base plate, but rest thereon. The hoist blocks are identical in construction and are in transverse sections of T shape. They may be made of cast metal, such as cast iron, from rolled metal stock or otherwise as found convenient. The particular blocks illustrated herein are designed to be made of cast iron. The body isof T shape having a recess at its outer marginal edge as indicated.

baseline formed between the oppositely dis-' posed corners of the block is less than the distance between the marginal edge of recess 15 and the base line formed between its opposite corners.

Although I have shown a block with an equal distance between the marginal edge of each recess,

18 and the base line formed by the opposite curb lugs, it is apparent thatrthese distances may be made different. As the particular blocks shown may be accommodated to all the cars now in common use, I have not shown three different dis- I tances or heights.

knuckles high enough above the axle to permit use of the hoist without the hoist blocks 12. There are other types of cars' having axles and steering knuckles so disposed that in raising the car a high clearance above the base plate is required. Blocks providing such clearance, if fixed to the plate, may be too high for the car to be moved into position over the base plate. With my blocks, the car can be moved to position and the blocks then placed in proper position. There are certain cars with independently sprung wheels which require high support above the cross plate. Such high support is secured by disposing blocks 12 in upright position as shown in Fig. 2. The curbs 9 prevent the blocks 12 from slipping transversely of the base plate, theblocks being of such dimensions as to fit between curbs 9. The curb lugs 16 embrace the sides of the axle or parts of the running gear associated with the wheel springing mechanism and prevent slippage of the car from the blocks 12.

There are now in use some cars havingstraight axles and some having curved axles with steering ribs 20,for; purposes of 1 strength, but these arenot essential to the invention, being merely me:- chanical expedients resorted to because the blocks shown are designed to be made of cast iron. It

is essential however, that the blocks have three-2 supporting sides, any one of which may be used to obtain variation in supporting heights;

What I claim is: 1. In a hoist for vehicles, the combination of a cross base plate for registration'witha wheel axis and supporting blocks; each supportingblock;

having three sides for selective use as bases to reston: saidv plate, threetriangularly disposed edges. forming car contact v walls, the; distance betweena car contactuwtall and-l its oppositely disposediside being different from the distance-- 26;; between another car contact wa1l aridits-- op-- positely disposed side.

2. In a hoist for vehicles, the combination of a cross base plate for registration-with a wheel axis and'supporting blocks; each supporting block: having threesides for selective useas bases to rest onsaid" plates, three triangularlyi disposed corners on said block the: edges forming said corners-beingrecessed-toprovide curb lugs at their ends; the: distance betweerrthe bottom .wallof a recess ata corner and its oppositely disposed side being" different: from the distance between the bottom :wall 5 of J anothenrecess and its oppositely disposed side.

3: ma hoist for: vehicles, the-combination of a: cross-base plate for registration I with i a wheel axis' and' supporting block; each supporting block having three corners for selective two point support: with relationato -said corners-ion resting: on

said=plate-, th'eeedges forming said:corners being recessedto-provide curb lugs atctheir ends,the distance: between the bottom-wall l of a recess at: acornerandthe base: line between the other: corners of said' block being difierentv from the distance :b'e-tweenthe bottom wall ofanothersrecess -andthe base-line between its oppositelydisposed corners.-

4. In a hoist for vehicles, the combinationpof:

aorossbase-- platefor-registration with .a: wheel axis-and supporting blocks, saidplate having, longitudinally extending edge curbs, each ,blockhaving-*-three-sides 'for selective use as bases .to .rest

on said plate between curbs, the edges on said block forming car contact walls, the distance between a car contact wall and its oppositely disposed side being difierent from the distance between another car contact wall and its oppositely disposed side.

5. In a hoist for vehicles, the combination of a cross base plate for registration with a wheel axis andsupporting blocks, said plate having longitudinally. extending edge, curbs; each supporting block having three sides for selective use as bases to rest on said plate between curbs, three triangularly disposed corners on said block the edges forming said corners being recessed toprovide curb lugs at their ends, the distance between thebottom wall of a recess and its oppositely disposed side being difierent from the distance-between the bottom wail of another recessand-its oppositely disposed side.

6. In a hoist for vehicles, the combination of a cross base plate. for registration witha wheel axis and supporting blocks, said plate having longitudinally. extending-edge curbs; each supporting block, having three corners for selective two point'support with relation to said corners,

' said blocks resting on saidplate between curbs,

the edges forming said corners being recessed-to provide curb lugs at their ends, the distance be-- tween the bottom wall of a recess at a corner and thebase line between the other corners of said bloclrbeing diiierent from the distance between the bottom wall of another recess. and'the base" line between its oppositely disposed corners.

7. In a hoist for vehicles, the combination of a cross base plate for registration with a'wheel axis and supporting blocks; each supporting block being multi-sided for selective use of the si-des as bases to rest on said plate, car contact walls opposite said bases, the distance between a car'contactwall and its-oppositely disposed basebeing different from thedistance between an othercontact wall and its oppositely disposed base.

8. In a -hoist for vehicles, the combination .OfZal cross base plate for-registration. with a VvhGBli axis=and support-ing blocks; each supportinglbl'ock being multi-sided for selective use of the sidesas:

1r HAROLD STEPHEN MULHOLLEN.

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