US1846299A - Automobile lift - Google Patents

Description

Feb. 23, 1932. c. .1. BRISTOL AUTOMOBILE LIFT Filed Oct. 29,. 1950 fnl/ez? or ws r/r/ 20/ im MV Patented Feb. 23, 1932 UNiTED STATES PATENT OFFICE oYnUs J. Beieren, or mss MOINES, IOWA, AssIoNon To GLOBE. MACHINERY a SUPPLY' COMPANY, OF nEs rio-mns, iowa, A CORPORATION or `IOWA AUTOMOBILE LIFT Application led October 29, 1930. `Serial No. 491,933.

This invention relates to th at class of l'luid pressure lifts in which there is employed an upright cylinder open at its top, a piston withinthe cylinder having' a head at its lower end (preferably olf the cup leather variety), and means at the upper end of the piston for en gaging and elevating' an automobile.

The object of this invention is to provide mea-ns of simple, durable and inexpensive con-- struction to prevent the entrance or" dirt or water into the upper end of the cylinder, and also to provide means whereby the piston when elevated may be held against rotation.

This invention consists in the construction,

arrangement and combination of the variousl parts ot the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in the claim, and illustrated in the accompanying drawings, in

which:

Figure 1 shows a side elevation of an automobile lift device having my improvements applied thereto.

Figure 2 shows a horizontal sectional view through the upper end of the piston at the point where the locking pin is extended through the piston and looking downwardly.

Figure 3 shows a sectional view on the line 3-3 of Figure 2.

Figure 4 shows a sectional view on the line 4 4 of Figure 2.

Referring to the accompanying drawings,

I have used the reference numeral 10 to indicate generally the upright cylinder, which is preferably embedded in the ground. A

pipe 11 communicates with the lower end of the cylinder for applying 'fluid pressure to elevate the piston. At the top of the cylinder is a flanged collar 12 detachably connected to the cylinder by the bolts 13.

The piston, indicated by the reference numeral 14, is hollow and its upper portion loosely fitted into the collar 12, and at its lower end is a cup leather packing 15, which engages the interior oit the cylinder. The piston projects beyond the top Ot the cylinder and has at its upper end a structure indicated generally by the numeral 16 for engaging and supporting an automobile.

5 The structures just described are now in common use for elevating and servicing automobiles, and it has been demonstratedin practice that with the raising and lowering of the piston within the cylinder, dust anddirt aci cumulates yupon the outer surface of the pisder with objectionable results.

Detachably `mounted on the top of the o5 i flange 12 is a housing having al cylinder, side wall 17 and a top @18extende'd inwardly to loosely lit the piston. At the top of the hous ing is a raised ribf19 having radially arranged l notches 2() therein. Mounted within the hous- `'I0 ing is a flexible packing strip 21, preferably 4of feltpthe ends thereof being beveled as shown ati22. This strip is wound about the` piston before the ,housing is placed in posip tion. i i i `'I5 V Then for the purpose of yieldingly holding the packing strip in' itrictional engagement with the piston, lprovide one or more coil springs 23. These springs havehooks 24 formed in their ends, and the springs are wound around the outer surfaces` of thepacking 21 and their ends are hooked together, as shown in Figure 2, so that they constantly apply yielding pressure inwardly upon the packing strip 21. 85

After the springs are placed in position, then the housing is moved downwardly on the pistonl and bolted to thefiange 12, as shown in Figure 4. The packing is preferably thoroughly soaked with Oil before being 49o placed in position, and then may be lubricated from time to time through the loosely fitted opening between the top of the housing and the piston.

Obviously, with this construction the acl- 55 ing may be readily, quickly and easily p aced in position, and then thoroughly protected by the housing, and serves as a cleaner for the outer surface of the piston and prevents the entrance of dust or water into the space be- 2 d Y I 1,846,299

tween the upper end of the cylinder and the piston, and yet does not appreciably intertere with the up and down movements of the piston.

5 When the piston is wholly or partly elevated it is sometimes desirable to hold it against rotation, and for this purpose I have provided in the piston a sleeve 26 extended l through the piston and open at both ends, and into'this sleeve I insert a round bar 27 with l its ends projecting beyond the piston. When this has been done, and the piston lowered until the bar engages the notched rib on .the top of the housing, then the bar will enter these radial notches and prevent rotation of vthe piston, and also lock the piston against downward movement. vWhen it is desired to lower the piston, fluid pressure is applied to elevate the piston a slight distance; Then the bar 27 Vis removed and then the piston may freely rotate and move downwardly.

The housing performs the'double function of protecting the packing, preventing the packing from moving upwardly with the pisl ton and also provides a raisednotched ribto co-operate with the bar 27 1 in preventing downward movement of the piston, and also preventing rotary movement thereof. By

this arrangement obviouslythe bar 27 does 30 not interfere with the boltslS which project upwardly'through the ange 12. f

I claim as my invention: In a lift device, the combination of a cylinder, a iange at the top of the cylinder, a piston slidingly mounted in the cylinder, a housing detachably fixed on top of said flange and surrounding the piston, the upper surface of the housing being notched, said piston being formed with a transverse opening, a'bar eX- tended into the opening and projected beyond the piston and designed to enter a notch in the housing for holdingk the piston against downward and rotary movements, and a packing within the housingand in engagement with the outer surface of the piston.

Des Moines, Iowa, October 23, 1930.

' CYRUS J. BRISTOL.

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