US1872592A

US1872592A - Lifting mechanism

Info

Publication number: US1872592A
Application number: US326423A
Authority: US
Inventors: Hott Ion Von Kert
Original assignee: Joyce Cridland Co
Current assignee: Joyce Cridland Co
Priority date: 1928-12-17
Filing date: 1928-12-17
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

2 Sheets-Sheet l I. VON K. HOTT LIFTING MECHANISM Filed Dec.

Aug. 16, 1932.

Aug. 16, 1932. A

i. VON K. HOTT LIFTING MECHANISM Filed Dec. 17, 1928 2 Sheets-Sheet 2 ATTR/VEY ff... a WwmsK Y as stops. Y

Patented Aug. 16, 1932 nmT-sDs-ITES Param I e' Ion von Krsna norm; or nAY'roNyfoHIo, Assreron 'ro kann roven-Calmann lczozlvr-Y rAnY, or nAYtronbHIo, AfconronAT-roiv; or onro MarnierV MECHANISM s Application mea vnetremila-r 17,1928. swarm. seams. 7

rlhis invention relates to a lifting mechanism and more particularly to amechanlsm .for elevating an automobile-to permit access to be had to the chassis for thepurpose of lubricating the same. Y

One object of the invention is to provide a hydraulic lifting mechanism'which will be simple in its construction, eiiicient in operationand which can be easily controlled.

A further obj ect of the invention is to provide such a mechanism with controlling means of such a character as to safeguard the mechanism against accidental release.

A further object of the invention is to provide a hydraulic mechanism in which the lifting element will be actuated by a liquid under air pressure; andtoprovide means whereby the air which has been used to actuate vthe lifting mechanism can be used for other purposes without releasing the load.

, A further object of the invention is to provide such a lifting mechanism with runways Vhaving at their ends pivoted parts which may be placed either in an inclined positionito guide the automobile ontothe runways'or maybe locked in elevated positions to serve A further object of the invention is top-rovide means for supporting the runways with their lateral edges spaced above the supporting surface to prevent injury tothe operator in the event his foot should be partiallyl be# neath one of the runways when the load is lowered. V i

Other objects of the invention willr appear as the mechanism is described in detail.

ln the accompanying drawings'Fig. l is a plan view of a lifting mechanism embodying my invention and partly broken away; Fig. 2 is a vertical'k sectional view taken on the line 2 2 of Fig. 1 centrally through' the mechanism with the runways partly broken away; Fig. 3 is a transverse section taken on the line 3 3 of Fig. 2; Fig. 4 is a sectional detail View of the controlling valve; Fig. 5 is a sectional detail view of the check yvalve for the air line; Fig. 6 is a side elevation of the end portion of one of the runways showing theq pivotedmember or shoe inits lowered position; Fig. 7 isa similar view showing the pivoted member locked in an'el'evated l position; Fig. 8 is a transverse sectional view of one of the runways taken on the linel'8-8 of Fig. l. Y

- In these drawings I have illustratedl eineV embodiment of -mypinvention butV it lwill be understood that this has been chosen for the purpose ofillustration only, and Ithatvthe mechanism may take various forms and may be used for various purposes without depart- 1; ing fromV thespirit of the invention.

' In that particular embodiment ofthe invention here illustrated the lifting-'mechanism as a whole comprises a cylinder llO which preferably is vembedded in the ground with its upper end adjacent toV the'surface Yof the ground. Mounted within the cylinder l0 for vertical movement withl relation VVthereto is a plunger or piston 11 with, which 'is connected the load supporting device. As i Yhere shown, the 'plunger is cylindrical in form 'and is of such length that when inits Alowermost position the upperV endl thereof Vwill project above-the cylinder.

Rigidly secured to the projecting upper end( of the'.

plunger is a casting 12 to which Vis rigidly to' retain the wheels `against lateral displacement, with relation to the runways.'` A

TheY plunger 11 is hollow and is closed at `its lowerfen'd by a head 16 and at its upper end by a head 17. Both 'the cylinder and the plunger are adapted to contain-a liquid,V Vpreferably oil7 and when the plunger is in its lowermost position it willl be-filled with liquid: to al'point spaced a short distance 'fromthe upper headl'.' The upper rend o f the cylinder is tightly closed and, in the present instance, a nbearingq member H 118,1 is rigidly secured to' and arranged vwithin the upper A end vof the cylinder to receive the plunger. n with a packing gland l9to seal the connec- 'tionbetween the same and the plungen vThe This bearing member uis provided eo I.

bearing member has a downwardly extending portion 20 engaging the plunger some distance below the top of the cylinder and provided an elongated bearing which will brace the plunger against lateral strains and which will be engaged by a stop or flange 21 at the lower end of the plunger to limit the upward movement of the plunger.

The interior of the plunger is connected with the cylinder by a suitable conduit so that the liquid maybe forced from the plunger through this conduit and ,into the cylinder where it will act upon the lower end of the plunger to elevate the latter. The conduit may take various forms but it is .preferably carried by the plunger and, in the present construction, comprises a pipe 22 ex- `tending through the upper-head 17 of the plunger to a point near the bottom of the plunger whereit has lopen communication with the interior thereof. A packing gland 23 seals the joint between the pipe and the Yhead 17. A second pipe 24 extends through Ithe upper head 17 of the plunger, where it is provided with a packing gland 23a, through the full length of the plunger and through the lower head 16 thereof, so that it has open communication with the cylinder beneath the plunger. The upper or outer ends of the two

pipes

22 and 24 are connected one to the other and means are provided for controlling ,the iow of liquid therethrough. In order that the controlling means may be located for convenient operation I have ,connected the upper end of the pipe 22 with a laterally extending pipe 25 and have connected the upper end of the pipe 24 with a laterally extending pipe 26. These pipes 25 and26 are substantially parallel and extend .transversely to the plunger to a point be- :yond one of the runways 14 where the ends .of the

pipes

25 and 26 are connected one with the other, this connection preferably comprising a valve 27. The valve 27 is of such a character that normally it will operate to permit the liquid to pass from the pipe 25 of the conduit to the pipe 26 thereof and to pre-A .vent the passage of the liquid in a reverse direction. Manually operated means are provided for opening the valve to permit the liquid to flow in a reverse direction, that is,

.to pass from the pipe 26 to the pipe 25. As

here shown, the valve comprises a casing having mounted therein a vertically movable valve stem 28 on which is mounted a valve member 29 to control the port within ythe valvecasing. A spring 30 acts on this valve to hold the same normally on its seat but is of such strength that it will yield to permit the valve to open under the pressure of the liquid in the pipe 25. The stem 28, vwhich is rigidly secured to the valve member 29, projects above the upper end of the casing and is arranged to be engaged by a VVlever or operatinghandle 31 which is pivotally mounted on a bracket 32 carried by the valve casing.

The liquid in the plunger is preferably forced into the cylinder to actuate the plunger by introducing air under pressure into the f upper end of the plunger. As here shown, an air pipe 33 is mounted on the upper head 17 of the plunger and communicates with the interior of the plunger. This pipe extends .laterally from the Vplunger and its outer end is ydivided to provide two branches, one an inlet branch 34 and the other an outlet branch 35." The inlet branch 34 is provided with a coupling member 36 whereby it may be connected with a flexible hose 37 leading to a source of supply of airunder pressure, such as an air compressor or a high pressure storage tank. A check valve 38is interposed in the inlet branch 34 of the air line to prevent the reverse flow of the air. Amanually operated valve 39 is interposed in the outlet branch of the air line ,to normally close the Same.

When air under Vpressure is delivered to the branch 34 ofthe air line this air will be introduced into the upper end of the plunger 11 and will force the liquid which is in the plunger outy through the conduit, consisting of the

pipes

22, 24, 25,26 and the valve 27, which conduit will ydeliver the liquid into the cylinder below the plunger, thereby forcing the plungerupward and lifting the load thereon. The valve 27 will operate to prevent the reverse flow of the liquid through the conduit and .thereby retain the plunger in the position to which it has been elevated. The valves in the air line being normally closed will 4preventthe escapeof the air from the plunger and will also serve to retain the plunger in the position to vwhich it has been elevated.A In .order to lower the plunger it is necessary,'first, to relieve the air pressure .within the plunger and to then manually operate the controlling valve 27 to permit the.

`reverse flow ofthe liquid through the conll .The controlling'l valve is normally closed Y against the lreverse flow of liquid and must be `held open by the ,operator in order to lower the load. By manipulating the Vvalve to regulate the flow of liquid therethrough the vspeed at which the load is lowered may be controlled.

In the lubrication of an lautomobile it is 25 customary to spray the springs with oil, compressed air being used for that purpose. ln

Vthepresent device, I have provided means whereby .the air under pressure which has been, utilized to elevate .the load may be used 1 30 it/atea ing the load. To this end the air outlet pipe' 35 is -provided with a coupling 40 by means of which it may be connected with a flexible hose 4l leading to the oil spray. After the oil spray has been connected with the air line the valve 39 is opened and the air under pressure permitted to pass to the oil spray, thus utilizing air under pressure which would otherwise be wasted. The controlling valve 27 of the liquid conduit being closed the withdrawal of the air under pressure will have no effect upon the position of the plunger.

The runways 14 are provided with means for supporting the same out of contact with the supporting surface and, in the present instance, the supporting means comprises transverse members 42 rigidly secured to the undersides of the runways, there being one of these supporting members at each end of each runway. Each supporting member has its lateral lower portions cut away so as to provide the same with a narrow central part 43 which contacts with the supporting surface, thereby spacing the lateral portions of the supporting members such a distance from the supporting surface that the foot of an operator will not be injured if it should be inadvertently placed in the path of the supporting member as the load is lowered. The runways are reinforced by means of truss rods 44 which extend over brackets 45, rigidly secured to the transverse frame member 13, and are rigidly secured at their ends to the respective supporting members 42.

Each runway is provided at each end thereof with an inclined portion or shoe 46 the outer end of which rests upon the supporting surface and serves to guide the wheels of the vehicle onto the runway. This shoe is pivotally mounted on the end of the runway so that it will yield and cause no injury should it strike the foot of the operator or any other obstruction. As here shown, each shoe is provided at each side thereof with an ear 47 rigidly secured thereto and having a slot 48 to receive a pin 49 projecting from the adj acent flange l5 of the runway. The lower portion of each ear is curved as shown at 50 and is of such length that when the shoe is in its downwardly inclined position the curved end of the bracket will rest upon the upper surface of the supporting member 48, thus providing a firm support for the shoe and maintaining the inner edge thereof in line withl tion, whichposition it will'seirve jas aistoip to prevent'the automobile from runningroif the runways.

If desired, the apparatus may be provided with a receptacle to receive oil drained from the crankcase or other part of an automobile. In the present device a drain pan 52 is carried `by an arm 53 pivotally mounted at 54 on the lower' side'of one ofthe runways so that: it can be moved to various positions beneath the automobile. While I have shown but one 'such drain pan it'will be obvious that a' similar pan maybe provided on'the opposite side of the frame member 13.

vWhile Ihave shown and described one embodiment of my invention I wish it to be understood that I donot desire to be limited to the details thereof as various modifications may occur to a person skilled in the art. IIaving now fully described my invention, what I claim as new and desire to secure by Letters Patent is:

ll. Inan'A automobile lifting mechanism,

comprising a lifting `element mounted for vertical movement, means for actuating said lifting element, and a frame carried by .said lifting element, runways mounted on said frame on opposite sides of said lifting-element, each of said runways comprising an end portion pivotally lmounted thereon for movement either into a downwardly inclined position or into an upwardlyV extending position, and means lcontrolled by the movement of said portion of said runway to said upf wardly extending position to lock the same'in that position. Y

2. yIn an automobile lifting mechanism comprising-a lifting elementmounted for vertical movement,'means for actuating said end thereof a supporting member, a shoe rY arranged at said end of each runway, a locking member carried by said shoe, means for pivotally and slidably connecting said locking member with said'runway,said locking member being so arranged that when the, outf x er end of said shoe is elevated said locking member willbe moved into locking engagement with the outer edge of said supporting memberto vretain said shoe in its elevated position. v l

3. In an automobileliftingmechanismcomy prising a lifting element mounted for verti- .cal movement, means foractuating said lifting element, and a frame carried by said lifting element; runways mounted on said frame on opposite sides of said lifting element, a supporting member secured to each of said runways near the end thereof, a shoe arranged at said end of said runway, ears secured to said shoe and having slots, pins carried by said runway and extending ISO through said slots, each ofy said ears having its-lower portion. arranged to rest upon said supporting member, and supportsaid shoe in proper relation to said runway,` when the outer end of said shoe is in its lowermost` position, said ears also having shoulders on their rear ends adapted to be moved into line with the `outer edge of said supporting member when the outer end of said shoe is elevated and thereby lock saidvshoe in its elevated position` l 4. VIn an automobile lifting mechanism comprising a. lifting element mounted for vertical movement, means for actuating said lifting element, and a frame carriedvby said lifting element; runways mounted on said frame on opposite sides of said lifting element, each of said runways having a member connected with one end thereof for movement into either` a downwardly inclined position or an upwardly extending position, said runway and said member having Cooperating parts arranged to be moved automatically into looking engagement one with the other when said member is moved to said upwardly extending position.

5. In an automobile lifting mechanism comprising a lifting element mounted for vertical movement, means for actuating said lifting element, and a frame carried by said lifting element; runways mounted on said frame on opposite sides of said lifting element, each of said runways having a member connected with one end thereof for movement into either a downwardly inclined position or an upwardly extending position, said runway and said member having cooperating parts rigid therewith and so arranged that the movement of said member to said upwardly extending position will cause said part of said member to move into locking engagement with said part of said runway.

,6, In an automobile lifting mechanism comprising a lifting element mounted for vertical movement and a runway carried by said lifting element, a member pivotally mounted at oney end of said runway for movement rinto an upwardly extending position7 anda part carried by said runway to retain said member in saidupwardly extending position, said member and said part being so' arranged that they will be brought automaticallyr into retaining relation when said member is moved to said upwardly extendm position.

im hereto- VION VON KERT HOTT.

testimony whereof, I aiiix my signature i