US1344510A

US1344510A - Hydraulic gear-jack

Info

Publication number: US1344510A
Application number: US331643A
Authority: US
Inventors: Albert W Hilliard
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-10-18
Filing date: 1919-10-18
Publication date: 1920-06-22
Anticipated expiration: 1937-06-22

Description

UNITED sra'rEs ALBERT W. HILLIARD, OF WHEELERSBURG, OHIO.

HYDRAULIC GEAR-JACK.

Specication of Letters Patent. Patented June 22, 1920.

Application filed October 18, 1919. Serial No. 331,643.

To all whom 'it may concern.'

Be it known that I, ALBERT W. HIILIARD, a citizen of the United States, and a resident of Wheelersburg, in the county of Scioto and State of Ohio, have invented a new and ImprovedA Hydraulic Gear Jack, of which the 'following is a full, clear, and eX- act description.

This invention relates to improvements in hydraulic gear jacks, an object ofthe invention being to provide an improved construction and arrangement of hydraulic jack adapted to strip or remove a' gear, pinion, cam, collar, commutator core, or various other devices from the shaft carrying the same.

A further object is to provide improved adjustable means for engaging and holding the gear or other device against longitudinal movement and provide improved hydraulic means for moving the shaft longitudinally to remove the gear from the shaft.

WithI these and other objects in view the .invention consists in certain novel features of construction, and combinations and ar-l rangements of parts, as will be more fully pointed out in section, but partly in elevation, the section being on the line-1 1 of Fig. 2;

Fig. 2 is a view mainly in elevation, but partly in section on the line 2-A-2 of Fig. l;

Fig. 3 is a view in vertical transverse sec# tion on the line 3-3 of Fig. 2; and

Fig. 4 is an enlarged fragmentary vview in longitudinal section illustrating one of the check valves. i

1 represents a cylindrical casing havin longitudinal integral webs 2 at its sides an a frame 3 at one end. This frame 3 may be a separate member 'Xed to the casing or may be integral therewith as desired, and at its ends. supports removable plates 4.

These plates 4 provide rotary mounting for,

. adjusting screws 5 which are located inhoritheir inner ends are provided with internally Screw threaded sleeves 10 receiving the screws 5 and caused to move toward or away from each other as the screws are turned. These jaws 9 at their free ends are made with inwardly projecting lingers 11 adapted to operate as shoulders and receive the .pressure of a gear wheel 12 thereagainst, the lingers being spaced apart to accommodate the shaft 13.

While I refer to the part to be removed as a gear 12, it is, of course, to be understood that any part which may be removed from the shaft by .longitudinal movement is to be included as my invention is not limited to the removal or stripping of gears.

A casing 1 is provided with a removable head 14 at its'outer end and a plunger 15 is movable in the casing and made leak-proof by means of any suitable lpacking ring or cup 16.A A plunger rod 17 is iiXed to the plunger 15 and is movable through the end of the casing 1 and adapted to bear against the shaft 13.

A coiled spring 18 is located in the casingv `1 at one side of the plunger 15 and exerts a pressure on the plunger tending to move the same toward the'head 14. A by-pass pipe 19 connects the respective ends of the casingvand a gate valve 20, or other desired form of manually operatedvalve, 1s provided inthe .by-pass pipe 19.

21 represents a pump casing which may be integral with the webs 2 above referred to, and provided with a pump plunger 21 operated by a hand lever 22'. This lever 22 1s pivotally connected at one end by means of a link 23 with a lug 24 on onerof the webs 2 and between its ends is 'pivotally .connected to the pump plunger 21', as

shown at 25. Pipes V26 and 27 connect the Y sides of the pump casing 21 with the respec `tive`end`s of casing l and in these pipes 2G and 27Y spring pressed check valves 28 are located which permit a passage through the pipes in one direction only which is from the forward end of the casing to the rear end of the casing.

An air compression dome 29 is located on the upper portion of the casing l near one end and Said casing and pipes above referred to are full of liquid 30 preferably a light oil, although, of course, the invention is not limited to the particular liquid employed. A

suitable space is left in the dome 29 for the accumulation of air to give the necessary cushioned flexibility to the operation and to allow the pressure to be as high as desired.

`With the parts as shown in F ig. 1, the operation is as follows: lVhen the pump plunger 21 is reciproeated, the liquid 30 in advance of the plunger 15 is sucked into the pump easing 21 and then forced through the pipe 27 back into the casing l in rear of the plunger 15. This movement ofthe liquid from one end of the casing to the other forces the plunger 15 longitudinally and as the gear wheel 12 is held against longitudinal movement in that direction, the shaft 13 is forced out of the gear. During this movement of the plunger 15, the spring 18 is compressed and when the operation is ended, it is simply vnecessary to open the valve 2() when the spring 18 will force the plunger to the rear and the liquid will by-pass through the pipe 19, as will be readily understood. The valve 20 will then be closed and the device will be ready to repeat the operation. As above stated, the jaws 9 can be adjusted to accommodate varying sizes of gear wheels or other devices to be removed from the shafts, and hence a wide latitude of operation is permissible.

Various slight changes may be made in the general form and arrangement of parts described without departing from the invention, and hence I do n'ot limit myself to the precise details set forth but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. An' apparatus of the character stated, comprising a casing, a pair of jaws at one end of the casing, a plunger in the casing, a plunger rod projecting through the casing and between the jaws, elastic means holding the plunger normally adjacent one end of the cylinder, and means for forcing fluid from oneend of the cylinder to the other to move the plunger against the action of the elastic means. f

2. An apparatus of the character stated, comprising a casing, laterally adjustable jaws at one end of the easing, a plunger in the casing, a plunger rod projecting through the casing and between the jaws, a spring Lear-,elo

interposed between the plunger and one end of the casing, and means for forcing fluid from one end of the casing to the other.

3. An apparatus of the character stated, comprising a casing, laterally adjustable jaws at one end of the casing, a plunger in the casing, a plunger rod projecting through the casing and between the jaws, a spring interposed between the plunger and one end of the casing, a pump, pipes connecting the pump with opposite ends of the casing, check valves in said pipes permitting a flow in one direction only, and said casing and pipes normally lilled with liquid.

4. An apparatus of the characterv stated, comprising a casing, laterally adjustable jaws at one end of the casing, a plunger in the casing, a plunger rod projecting through the casing and between the jaws, a spring interposed between the plunger and one end of the casing, a by-pass pipe connecting the ends of the casing, a manually operated valve in the by-pass pipe, a pump, pipes connecting the pump with the respective ends of the casing, check valves in said last-mentioned pipes, and said easing and pipes normally lled with liquid. i

5. An `apparatus of thc character stated. comprising a casing containing liquid, a plunger in the casing, a plunger rod projecting through one end of the casing, a spring around the plunger rod exerting pressure on the plunger tending to move it toward one end of the casing, means for forcing liquid from one end of the casing to the other, a by-pass pipe connecting the ends of the casing, a valve in the by-pass pipe, and an air dome on said casing.

6. An apparatus of the character stated, comprising a casing, a frame secured at the end of the casing, alined screws mounted to turn in the frame and held against longitudinal movement. jaws having screw threaded sleeves receiving the screws. inwardly projecting fingers at the free ends ofthe jaws, a plunger in the casing, a plunger rod projecting through the casing and between the jaws,'and means for forcingtiuid from one end of the casing to the other.

ALBERT XV. HILLIARD.