US2252036A - Hydraulic pulling and pressing tool - Google Patents

Description

9 1941- J. E. RUMMER 2,252,036

HYDRAULIC PULLING AND PRESSING TOOL Filed June 21, 1939 5 Sheets-Sheet l INVENTOR. 553M125 UMMZ'B BY 6/.3'6 M41 4 ATTORNEY.

' Aug. 12, 1941'. J, RUMMER 2,252,036

HYDRAULIC PULLING AND PRESSING TOOL Filed June 21, 1959 3Sheets-Sheet 2 F14 .ll

INVENTOR. JAMES E HUMMER ATTORNEY.

Aug. 12, 1941. .1. E. RUMMER HYDRAULIC PULLING AND PRESSING TOOL Filed June 21, 1939 5 Sheets-Sheet s A\ L H d 4A 552 11 7 4e jg l/ //////A l I INVENTOR.

JeMEsE; RUMME BY ATTORNEY.

Patented Aug. 12, 1941 HYDRAULIC PULLING AND DRESSING TOOL .lames lE. Rummer, Wichita, Kans., assignor oi forty-five per cent to Henry M. Powell, Wichita,

Mans.

Application June 21, 1939, Serial No. 280,279 2 illaims. (o 29-86) This invention relates to a hydraulic pulling and pressing tool. An object of my invention isto provide a tool that is hydraulically operated for the removal and placing of machine elements that are frictionally retained in operative position.

A further object of my invention is to provide a tool that is compact, having an armored hose .or the like connected with a compressor as a convenient means to operate the tool in congested places.

A still further object of my invention is toprovide a hydraulically operated tool that is inexpensive to construct and efficient in its performance.

A still further object of my invention is to pro vide a tool as above set forth, having a variety of grapples adjustably carried by the tool and being interchangeable.

A. still further object of my invention is to provide a tool void of side thrust during its operation.

These and other objectswill hereinafter be more fully explained, reference being had to the accompanying drawings, forming a part of this specification, in which like characters will apply to like parts in the different views.

Referring to the drawings:

Fig. 1 is a side view of the tool as applied to remove a gear or the like from a shaft.

Fig. 2 is a similar view turned through an arc of ninety degrees, illustrating by dotted lines the method of placing a gear on its shaft and a pipe substituting the grapples.

Fig. 3 is an outer end view of the tool.

Fig. 4 is an end view opposite to that of Fig. 3.

Fig. 5 is a sectional view through the piston rod coupling and portion of the rod.

Fig. 6 illustrates one form of a grapple substituting the coupling.

Fig. '7 is a longitudinal sectional view through the tool on its diametrical axis.

Fig. 8 is a sectional view taken on line 8-8 in Fig. 7.

Fig. 9 is a longitudinal sectional view through the compressor.

, Fig. 10 is a side view of the by-pass valve.

Fig. 11 is a sectional view taken on line I l- -l I in Fig. 10, showing an active position of the valve ports. I

Fig. 12 is a sectional view showing a neutral position of the ports with respect to compressive force a Fig. 13 is a side view of the valve core looking through its ports axially.

Fig. ii is a view of a check valve, partly in section.

Fig. 15 is an enlarged view of a modified coupling, parts removed for convenience of illustration. I

Fig. 16 is a side view of a grapple for the removal of sleeves, bushings, or oil well casings, said view partly in section.

Fig. 17 is an exclusive end view of the grapple.

My invention herein disclosed consists of a tool comprising a cylindrical shell l, each end of which is threaded externally to receive heads 2 and i threadedly secured on their respective ends of the cylinder. It will be seen that head 2 is secured by a flanged collar 2', the flange 2" seating in its respective ofiset external of the head, there being an internal shoulder to seat on the end of the cylinder wall, and made fluid tight by a gasket l, and a similar gasket is applied for the other head of the cylinder.

The said heads each are axially bored to receive a hollow piston rod l slideably engaging therein with a fiuid tight running fit through the medium of an' appropriate packing and gland element 5, as a whole, for each head thereof as shown in Figs. 7 and 8.

Secured to the hollow piston rod and moveable therewith is a piston comprising a centrally disposed disc 6 having a flexible disc-like packing l on each side thereof, and being secured to the disc by their respective disc members 8, one of which abuts a flange 9 integrally joined to the piston rod while the other disc is secured by an apertured element In that is threaded to engage on a threaded enlargement of the rod as at A, by which means the component disc members of the piston are brought to snug engagement and retained snugly on the rod to convey the same reciprocatingly, as later described.

Rotatable and slideably carried in the said hollow rod is a cylindrical solid rod ll having a nut I2 on the outer end thereof and a coupling l3 adapted to turn, being secured to the other end, said coupling being retained by a head it,

" integrally joined to the end of said solid rod,

the head B of the coupling being bored to receive said rod and being threaded as at C whereby the piston rod as a whole may be connected to the threaded end of a shaft l5, whereby a gear l6,

wheel or the like, frictionally retained, may be placed or removed from said shaft |5.' The cou pling, in other words, is the anchoring means for the piston to a shaft or the like, while the cylinder and grapples carried thereby is moved longitudinally of thepiston rod reciprocatingly.-

It will be seen in Figs. 1 and 2 that head 3 has two pairs of fingers 3' oppositely disposed and outwardly extending from the head, the adjacent fingers of each pair being spaced equally and oppositely from the diametrical axis of the head, as shown in Figs. 3 and 4, by which arrangement grapples ll are carried therebetween, said grapples consisting of a rod having a portion thereof threaded as at D, and upon which a, pair of nuts i8 will threadedly engage. The said nuts are spaced apart to receive their respective fingers therebetween; the other ends of said grapples each have a bifurcated portion turned at right angle to engage on either side of an element to be placed or removed from its respective shaft, and the said grapples being so carried between the fingers is means to vary their head extensions and to move the same toward-and from the diametrical axis of the cylinder, in which capacity said grapples are adaptable to elements varying in diameter and distance from the head of the tool, or with respect to the coupling point of engagement. The said grapples may be reversed with respect to their bifurcated heads for internal engagements, for example, to insert or remove bushings or the like. Furthermore, the said bifurcated heads may be otherwise positioned by turning the grapples, and when selectively positioned, the grapples are retained firm by the said nuts locking the grapples to their respective fingers.

Each head of the cylinder has a port it communicating with their respective ends of the cylinder, the outer portion of each being threaded to receive their respective pipe fittings 2d and 2i threadedly engaging therein. Said fittings are adapted to receive armored pipes 2d and El, coupled fluid tight to their respective fitting, and the said pipes extend through a flexible pipe casing 22 to where they oppositely connect with a by-pass valve casing 23, said valve being connected to a compression chamber 24 through the medium of a pipe 25 at the lower side of the valve, and also by a pipe 25 for the-circulation of liquid later described.

The said compression chamber 2 is equipped with a dispensing plunger 23 reciprocatingly operated by a lever 29, one end of which is secured to a free end of a rockable arm 36, while the other end of said arm is pivotally connected to a standard 3i carried by the head 32 of the compression chamber, said head being bored as at 33, in which is positioned said plunger, the said bore communicating with the compression chamber through an aperture 34 as a liquid inlet for the bore, and by rectilinear movement of the plunger the charge of liquid is discharged into and through said pipe 25 at the instant of closing the aperture 34 by the plunger passing thereover. The liquid thus discharged is checked against return by a ball valve 35 that is compressed to seat by a spring 36, at which time the plunger is free to return to its maximum outward stroke, at which instant the said bore is filled with a repeated charge of liquid from its compression chamber as compressed by a head 24' that is activated by a coil spring 24" wound on a stem F carried by the head.

It will be seen that the valve mechanism comprising the said casing has four hub connections identified by similar numerals to that of their respective pipes.

Rotatably positioned in the casing is a core having a diametrically positioned port 31 and a port on each side thereof as at 38 and 39 respectively, by which means the core may be turned to introduce compression at either end of the cylinder selectively. For instance, the core being turned as shown in Fig. 11 will direct the flow oi. the liquid through pipe 20' to its respective end of the cylinder, while pipe 2! will be the return from the other end of the cylinder, entering the compression chamber 24 through pipe 26, and vice versa when the core is turned as shown by dotted lines in Fig. 11, in which case the outflow is through pipe 29 and the return through pipe 26'. When the core of the valve is turned to the position shown in Fig. 12 is means to release compression so that the piston may be freely moved reciprocatingly, as the case of service may require; the valve being in such position, it will be seen that the liquid is free to circulate through port 3? as it communicates with each of said pipes 26 and El.

The invention above disclosed may be modified with respect to the grapples, in which case, a sleeve iii as shown by dotted lines in Fig. 2 can be placed on the outer extension of the piston rod to abut the hub of a wheel, while the coupling will draw the shaft through the hub opening.

In Fig. 6 is shown a grapple comprising a pair of arms ti pivotally connected at their corresponding ends by an apertured crotch 62. said crotch being secured to the end of the said rod ii in place of the coupling heretofore described. The arms each have a hook d3 turned outward from each other to function as a catch for a bushing or the like to be removed from a bearing, the said arms being pivotally connected will move toward each other when entering the same to its point of action, and being tensioned from each other by a spring positioned therebetween.

A further modification resides in the structure shown in Figs, 16 and 17. The grapples consist of radially disposed blocks lit carried by an axially bored head d? by seating the blocks in their respective sockets that extend through the wall of the head, the bore of the said head being enlarged to receive a conical bushing 68 slideable therein, so that the conical portion thereof will function as a seat for the inner ends of said blocks that are beveled to coincide with the cone of the bushing, whereby the blocks are moved outward simultaneously as the bushing is moved inward by longitudinal movement of the said headed rod ii, the movement of which is produced by said nut i2 threadedly engaging on the other end of the rod. The outer ends of the said blocks have a series of steps F, G, and H, step H being the seating point of a spiral spring 49 seating on each of said blocks as inward tensioning and retaining means thereof, and the step portion F is adapted to engage on the end of a sleeve 50, bushing or the end of an oil well casing to pull the same from another casing 5|, the latter may be of great length and weight.

- As means to provide longitudinal movement 01' the bushing and to prevent the same from moving outward and inward excessively, there .is provided a groove 52 in the Side of the bushing, the ends of which are closed to function as a stop when in contact with the inner end of a screw 53, that extends into the groove, permitting restricted sliding movement of the sleeve.

In Fig. 15 is shown a modification for the construction and installation of the coupling and its rod that is secured in the hollow piston rod.

. The solid rod has a flange 54 welded thereon a spaced distance from its threaded end portion and against which the shank J oi the coupling 55 will snugly engage when screwed thereon, the other end of the rod having its respective nut I2 to adjust for turning engagement of the solid rod II and to avoid excessive longitudinal movement of the rod. To turn the rod an aperture II is provided on the outer end thereof to receive a cross rod as turning means therefor to connect the coupling to a threaded end structure, the latter not shown in Fig. 15.

To avoid lost motion of the piston head duringpulsative movement at the compressor to move the piston, a valve comprising a ball 56 tensioned by a spring 51 is positioned adjacent each head of the cylinder for instant closing when compression is released by the pump mechanism of the compressor in its said pulsative action, by which means expansion of an armored hose longitudinally or diametrically will not effeet or cause a receding movement of the piston, and to permit free exhaust of the liquid, the valve at the exhaust end of the cylinder is disengaged by a screw 58 displacing the ball from its seat; furthermore, when the by-pass valve is turned to its neutral position, both of said ball valves must be displaced to permit free reciprocating movement of the piston.

While I have shown and described a by-pass valve positioned in working relation to the head of the compressor, the by-pass feature thereof may be embodied in the structure of the head, eliminating its present casing, and the said grapple carrying arms may be substituted by an annular flange outwardly extending from the head and having a series of apertures therearound radially to selectively receive the threaded ends of the grapples, and such other modifications may be made as lie within the scope of the appended claims.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a hydraulic pulling and pressing tool, in combination with a cylinder comprising a shell and an axially bored head to close each end of the shell, a hollow rod and a piston, secured to the rod, to engage in the shell reciprocatingly, of a'solid rod positioned in the hollow of the Piston rod and adapted to turn'therein, the said solid rod having a coupling element on one end and a nut on the other end as turning means for the solid rod, and the said coupling and nut operating to avoid longitudinal movement by the solid rod in the hollow rod as the coupling carries the load, means to admit fluid into the cylinder adjacent each head alternately, and packing means to render the cylinder fluid tight at the bore of each head of the cylinder,

2. In a hydraulic pulling and pressing tool, in combination with a cylinder comprising a shell and an axially bored head to close each end of the shell, one head having a pair of fingers radially extending from the periphery of the head and a similar pair for the oppositely dis- Posed side of the head with respect to the diametrical axis of the head, said fingers to function as an anchor to which grapples may be secured adjustably, a hollow rod to extend through the cylinder and outward through the bore of each head, and a piston in the cylinder secured to the hollow rod as reciprocating means therefor, the piston being moved by injecting fluid through each cylinder head alternately, said piston rod being of sufficient length to avoid inward movement from the bore of the heads at the maximum longitudinal movement of the rod, of a solid rod positioned in the hollow of flrst said rod and adapted to turn therein, a coupling removably secured to one end of said solid rod JAMES E. HUMMER.

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