US2851958A - Hydraulic jack operating device - Google Patents

Description

c. BALLARD 2,851,958 HYDRAULIC JACK OPERATING DEVICE Sept. 16, 1958 Filed Au 28. 1956 Fig.2

Clare Ballard IN VEN TOR.

United States Patent HYDRAULIC JACK OPERATING DEVICE Clare Ballard, Marlette, Mich. Application August 28, 1956, Serial No. 606,666 2 Claims. (Cl. 103-213) The present invention relates to a manually actuatable mechanical device for use in conjunction with a conventional-type hydraulic jack and which makes it possible for one to employ a hand crank, to convert rotary motion received therefrom into reciprocating motion and to utilize the latter for operation of a reciprocation pump such as is incorporated in the ordinary hydraulic jack construction.

More specifically the invention pertains to an attachment; that is, structural means which is harnessed on and thus attached to the hydraulic barrel and which is characterized by the means necessary to accommodate an applicable and removable hand crank and which is also characterized by an adapter which makes expedient the maintenance of the attachment in its intended functioning position on the stated barrel.

One improvement has to do with the adapter. This comprises a split band the ends of which are provided with lugs to accommodate bolt and nut means whereby the band may be simply applied and clamped on the barrel, the band being, in turn, provided wtih a pair of spaced outstanding parallel arms with cross bars and the cross bars having bearing means to properly accommodate and permit the operation of an eccentric and pitman adaptation.

Construed from a slightly different point of view the invention pertains to an eccentric having a stud to accommodate a universal which in turn serves to accommodate a detachable hand crank, a pitman cooperable with the eccentric and having linkage whereby the lower end thereof is operatively connected with the piston of the usual hydraulic jack pump means, in conjunction with the aforementioned adapter whereby the entire assemblage, treated in the sense that it is an attachment, is attachable to hydraulic jacks such as are currently in use.

Other objects, features and advantages will become more readily apparent from the following description and the accompanying sheet of illustrative, but not restrictive, drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the views:

Fig. 1 is an elevational view of a conventional-type hydraulic jack with the hand crank accommodating attachment or invention and showing the same applied and readied for use;

Fig. 2 is a fragmentary view with parts in section and elevation and which may be said to be taken approximately on the vertical line 2-2 of Fig. 1; and,

Fig. 3 is a plan view of the construction seen in Fig. 1.

Referring now to the drawings with the aid of reference numerals the casing or barrel of the conventional-type hydraulic jack is denoted generally by the numeral 6 and the base is denoted at 8. The aforementioned reciproeating pump means, which is a part of the jack, is denoted. generally by the numeral 10 and this means includes a cylinder 12 and a cooperating reciprocating piston 14. The interior details including the spring pressed ball check valve and so on are not disclosed here and need not be.

Taking up now the attachment which makes it possible to employ a readily applicable and removable hand crank (not shown) attention is first directed to that part which may be referred to generally as the adapter 16. As before mentioned this part of the invention is characterized by a broad split metal band 18 having its split or spaced ends 20 (Fig. 3) provided with outstanding spaced lugs 22 which accommodate an insertible and removable bolt 24 and a clamping and assembling nut 26. This construction serves to apply and retain the band around the casing or barrel 6 as shown in the drawings. The adapter also includes, as perhaps best shown in Fig. 3, a pair of spaced outstanding rigid arms 28 having an integral crossmember 30 providing a stabilizing brace. This brace has an aperture 32 therein through and beyond which a stud or journal 34 passes in the manner shown in Fig. 2. The outer ends of the arms 28 are reduced and provided with screw threaded terminals 36 which accommodate clamping nuts 38 which, in turn, serve to hold in place the detachable cross member 40. This member 40 is provided centrally with a bearing 42. The adapter including the parts stated is harnessed on a barrel and serves to accommodate the motion transmitting means. The latter comprises an eccentric 44 having a recess or socket 46 in one side receiving the relatively stationary stud or journal 34. Axially aligned with the journal 34 and extending from the left in Fig. 2 is an outstanding integral stud or journal 48 which provides a second journal and this is mounted for rotation in the bearing 42 and extends beyond the cross member 40 where it is provided with a flat faced portion 50 which accommodates the socket member 52 of the universal coupling means 54. The latter includes a stud 56 which serves to accommodate the applicable and removable hand crank (not shown). The numeral 58 designates a pitman and this has a band and opening 60 at its top which encircles the eccentric 44 to provide the reciprocating crank motion. The lower end of the pitman is operatively connected with a pin or bolt 62 carrying links 64 which are in turn connected by a pin 66 with the upper end portion 68 of the aforementioned reciprocating piston 14. It will be evident therefore that by harnessing the adapted or strap means 16 on the barrel 6 and properly assembling the eccentric and pitman and universal coupling means the hydraulic jack is now ready to be operated by way of the aforementioned hand crank (not shown). In any event, by attaching the stated hand crank to the universal joint and turning stud or journal 48 the eccentric 44 turns. It will be noted that the eccentric is partly supported and stabilized by the first named journal or stud 34 fitting into the bearing socket 46. Motion may thus be transmitted to the up and down pitman 58 which operates the linkage and consequently the pump. The harnessing adapter may vary in construction but the construction revealed is a preferred adaptation insofar as the present concept is concerned.

What is claimed as new is as follows:

1. An attachment for a conventional-type hydraulic jack comprising, in combination, adapter means comprising an attaching band designed and adapted to embrace the barrel of the jack, a pair of spaced parallel arms fixed at circumferentially spaced points to said band and projecting outwardly from said band, the outer ends of said arms being reduced in cross-section and screw-threaded, a cross member spanning the space between the arms and at right angles to said arms provided with holes at its respective ends through and beyond which said reduced screw threaded ends extend, the portions of the screw threaded ends extending through and beyond said hole being provided with clamping and assembling nuts, the intermediate portion of said cross member having a bearing hole therein, a second cross member fixedly mounted on and spanning the space between said arms and disposed in parallelism in respect to said first named cross member and provided with a bearing hole in axial alignment with the first named hole, that portion of said band which is adjacent and opposite to said cross members being provided with an integral stud projecting through and beyond the bearing hole in the second cross member and providing a journal, an eccentric located in the space between the respective cross members and provided at one side with a socket and said journal projecting into said socket, said eccentric being, in turn, provided with a journal in axial alignment with the first named journal'and extend-' ing through and beyond the bearing hole in said first named cross member and terminating in a portion which is adapted to accommodate a readily attachable and detachable universal coupling for a crank handle, and a pitman having an upper end arranged between the cross members and operatively connected with said eccentric depending below said eccentric and provided at its lower end with spaced parallel links which are adapted to be connected to reciprocating pump means on the stated hydraulic jack.

2. In combination, a conventional-type portable hydraulic jack embodying a base, a barrel, and a cylinder and piston arrangement constituting a reciprocating pump;

linkage operatively connected to the piston, a pitman operatively and hingedly connected to said linkage, said pitman having an aperture in its upper end portion, an eccentric operatively confined in said aperture and provided on one side with an outstanding journal, said journal being provided at its outer end with a flat faced portion, universal coupling means removably mounted on said flat faced portion and adapted to accommodate an attachable hand crank, and adapter means on said barrel comprising a pair of spaced parallel arms, a first cross member at right angles to and fixed between said arms and having an aperture providing a bearing, a second journal mounted for rotation in said bearing and projecting beyond said first cross member, a second cross member parallel to and spaced from the first cross member and removably mounted on the outed ends of said arms and provided with a bearing aligned with said first named bearing, said eccentric being arranged for operation in the space between said cross members and having a socket into which said second journal is operatively fitted, and the journal on said eccentric being mounted for rotation in the bearing in said second cross member.

References Cited in the file of this patent UNITED STATES PATENTS 364,258 Keating June 7, 1887 1,784,116 Shevlin Dec. 9, 1930 2,754,806 Funston July 17, 1956

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