US1601321A - Liner puller - Google Patents

Description

vto dislodge them.

latented Sept. 28, 1926.

tenen THOMAS J. Picos, OF EL MONTE, CALIFORNIA.

LINER PUL'LER.

'Application sied March 17, 1925.

rlhis invention relates Vto a liner puller intended 'primarily for use in removing liners from pump cylinders, and lthe like.

'It `isan object of xthis invention to provide a liner puller for a pump voperable by the power employed for operating the pump.

Another object ot this invention v1s to -provide a liner puller which lis operable to drive a liner out of its seat.

Another object of the invent-ion is to pro- 'vide a device ofthe Character above referred to which is simple, eecti-ve and practical in construction. Y

The various objects 'and features ot my invention will be 'best and more fully understood from the following detailed description of a typical preferred form ot the invention throughout which description ret'- erence is had to the accompanying drawings in which:

Fig. 1 is a sectional view o1" a. typical form or" a direct actin-g steam pump showing the device ,provided by my invention in operating position in the liner of the'pump cylinder.

Fig. 2 is van enlarged detailed-sectional view ot the device providedby this .invention showing itin operating position'in a liner.

Fig. 3 is a transverse section taken -as indicated by line 3;?) on Fig. 2 and Fig. l is the detailed transverse section view *taken as indicated by yline 4 4 on Fig. 2. Y

The cylinders orp pumps and various like mechanisms are commonly provided `with liners intended to be removed and'tinished or replaced from time to time. It is common practice to force such liners into place inuthe cylinders and toY vprovide packing means to make them tight when inv place. in practice great ditliculty vis often experienced in removingliners from cylinders as they are frequently seated very tightly and become set vso that it `is lvery diilicult The device provided vby this inventionis broadly applicable to removing liners in various mechanisms. It suited, however, for the removalof pump liners. Direct acting steam pumps being the piston which normally operated therein.l v In accordance 'with standard practice I have the pump piston.

Vthe shoulder 17.

"the piston rod 13, and means 21 carried is Vpartici'i'larly Serial No. 16,263.

the most common `type of pumps in 'common use, I have herein set forth my invention yi-n combination with this particular type of pump, it being understood that such reference is merely for purpose of illustration and 'to facilitate a practical understanding of the invention and is not lto be considered as limiting the scope or range oi application of the invention.

The pump illustration lin 1 of lthe drawings 'being a typical and simple form of direct acting steam pump includes, generally, a steam cylinder 10, fpump cylinder 11, a suitable trame 12 carrying the cylinders, a piston rod 13 extending between the c-ylinders, a piston 14 on the rod'13 in the steam cylinder 10, and various other parts common :to mechanismsot this general'character. IV have illustrated ay pump in which 'the' .pump cylinder 11 is provided with a typical linery 15 and have, in the drawings, illustrated the liner puller .provided by my invention arranged in the liner 15 in place of illustrated the pum-pend fof the piston rod 13 provided with a reduced part T16 to carry With this construction the piston 'rod presents a shoulder 17' against which the piston is held when Ain place onv the rod, the outer end of the vreduced part 16 'being threaded at '16L to receive a 4nut which operates to clamp the piston against The arrangement of the pump piston on the rod is not illustrated in the drawings, however, this construction fis 'employed in practically every pump of this character and is familiar to vthose skilled in the art. y

The construction provided by my present in-vention'is intended primarilyto engage or L.gr-lip the cylinder hner '15 and to be actuated 'by or through the operating 'means ot the pump, infthis case by the piston rod 13, 'The form-ofthe invention illustrated inthe drawings, includes, generally,'a body 2O adapted-to be applied to and operated-bv or connected vwith the body 2O and adapted "to grip of the 'cylinder liner 15. The body `is preferably tubular in form and is provided with a longitudinal opening 22 sufficiently large to freely pass the reduced part 16 of the piston rod. The outside of the body is provided with screw threads 23 adapted to carry and hold the liner engaging means 21. The body 2O is adapted to be arranged on the reduced part 16 of the piston iod between the shoulder 17 and an abut* ment, for instance a nut 24 applied to the screw thread part 16a at the outer end of the reduced part 1G. The body 2O is proportioned and the shoulder 17 and nut 21 are related, so that a certain amount of longitudinal movement may take place between the rod and body. The particular amount of movement desired between the rod and body may vary and may be regulated by varying the position of the nut 24 on the screw thread part 16a. lVhen the device is operated, as will be hereinafter described, the piston rod is moved relative to the body to bring the shoulder into engagement with the inner end of body 2O and thereby force or drive the body outwardly with relation to the pump cylinder of liner. In order that the impact of the shoulder 17 driving the liner may not damage the shoulder 17, or the end of the liner, it is desirable to provide means between the shoulder and the end of the body to protect them. ln the form of the invention illustrated in the drawings l have shown a removable cap 26 on the end of the body 2O and have also shown a protecting ring 27 arranged on the reduced part 16 of the rod in engagement with the shoulder 17. With this construction the wear or distortion caused by operation of the device is taken by the parts 26 and 27. rllhese parts being` comparatively small and simple in construction may be replaced with very little expense.

In accordance with the broader application of my invention the liner engaging means 21 may be varied in its inode of operation and construction it being essential only that this means be such as to effectively and securely engage or grip the pump liner so that the liner is moved with the body 20. ln accordance with the preferred form of my invention the liner engaging means operates to frictionally engage within the liner and includes, generally, a wedge member 30 and a plurality of slips 31. rlhe wedgememloer is connected to the body 20, it being preferred to mount it directly on the body, for instance, to screw thread it on the body as clearly shown in Fig. 2 of the drawings. The wedge faces 32 which carry the slips 31 are provided with ribs 33 which operate in sockets 311 in the slips to retain the slips in position. The body 30 is, of course, disposed longitudinally of the cylinder liner and the wedge faces 32 extend longitudinally of the body and are inclined or inwardly divergent, .s clearly shown in Figs. 2, 3, and 4 of the drawings. The inner surfaces of the slips 31 are disposed to properly fit the wedge surfaces of the wedge member, while the outer surfaces 36 of the slips are curved to conform to the interior or inner surface 37 of the liner. In practice l prefer to provide the outer surfaces 36 of thefslips with a plurality of transverse depressions 50 as I find this increases the gripping power of the slips and l prefer to form the slips of material which is softer than the liner so that they do not cut or damage the surface of the liner.

As means for operating or urging the slips into position with relation to the wedge so that they grip the interior` of the liner l may provide a spring L10 in connection with each slip to normally urge it inwardly with relation to the wedge member. In the particular construction shown in the drawings springs tOvare arranged between the slips 31 and a flange member L11 retained on the outer end of the body 20 by a nut l2. The springs Ll0 are helical compression springs arranged under compression between the flange member L11 and slips 31. The amount of compression of the springs and therefore the pressure with which the slips are operated may be regulated by adjustment of the nut 11 on the body. Viith the construction which l have just described the device can be moved freely inwardly in the liner to the desired position but as soon as it is started outwardly in the liner the slips grip the liner to prevent the outward movement. 1n practice it is desirable to provide one or more of the slips with a screw threaded opening 70, or the like, to receive a screw threaded rod or the like, if it is desired to release the device when in position in the liner. 1n the construction shown in the drawing the flange member .t1 is provided withopenings 71 so that rods, or the like, can be inserted into the liner from its outer end to engage the openings in the slips.

n operating the device it is applied to the piston rod in the manner shown throughout the drawings so that the body 20 is carried between the shoulder 17 and nut 211 with provision for the desired amount of move- 1 ment of the rod relative to the body. With the device in place on the rod it may be moved inwardly to the desired position in the liner bysuitable operation of the steam cylinder. With the device in position such 1 is spaced from the inner end of the body.

rlhe part-sthus set ready for operation, steamv may be admitted into cylinder 10 to move the shoulder 17, or the ring 27, into engagement properly gripping the liner. By applying pressure gradually to the body the liner may be forced out of the cylinder, however, itis usually necessary to return thevparts to the position s'hoivn in F ig. 2 and to apply steam to cylinder l0 to move the ring 27 quickly into engagement with the cap 26 to impart a blow to the body. If the liner is not dislodged by a single blow the operation may be repeated and the force of the blows varied until the liner is removed. When the liner has been dislodged the device may be easily released from the liner and removed from the piston rod. From the foregoing description it will be apparent that the various degrees of pressure and impact may be obtained through the mode of operation just described and that the device when properly operated will quickly and eti'ectively dislodge a cylinder liner even though it may be very tightly seated.

Having described only a typical form and application of my invention I do not wish to limit myselr" to the particular details hereinabove set forth, but wish to reserve to myself any changes or variations that may appear to those skilled in the art, or fall within the scope of the following claims.

Having described my invention, I claim :V

1. A device for use in a cylinder having a liner and a rod extending into it, said device including a body, means forconnecting the rod and body for limited relative movement, and means for connecting the body and liner including a wedge carried by the body and av plurality of slips operated by the wedge toV grip the liner.

2. A device for use in a cylinder having a liner and a rod extending into it, said device including a body, means for connecting the rod and body for limited relative movement, and means for connecting the body and liner including a wedge member carried by the body, slips arranged to be operated by the wedge member, and means normally tending to operate the slips to cause them to grip the liner.

8. A device for use in a cylinder having a liner and a rod extending into it, said device including a body, means for connecting the rod and body for limited relative movement,

and means for connecting the body and liner including a wedge member carried by the body, slips operable by the wedge member, and spring means normally urging the slips to position to grip the liner.

4. A device for use in a cylinder having a liner and a rod extending into it, said device including a body, means for connecting the rod and body for limited relative movement, and means for connecting the body and liner including a wedge member carried by the body, slips-operable by the Wedg'emember, .and spring.. means! normally urging.

the slips to position to grip the liner, the springY .means Iincluding.springs each having one .end held stationary relativeto the body and the. other end engaging a slip.

.5. A device `forfuse in acylinderhaving a liner and a rod-extending'into it, saidrdevice including a body, means for connecting the rod and body for limited relative movement, and means for connecting the body and liner including a wedge member carried by the body, slips operable by the wedge member, and spring means normally urging the slips to position to grip the liner, the spring means including a stop member carried by the body and springs arranged between the stop member and slips.

6. A device for use in a cylinder having a liner and a rod extending into it, said device including a body, means for connecting the rod and body for limited relative movement,

and means for connecting the body and liner including a wedge. member screw threaded on the body, slips operable by the wedge member, and spring means normally urging the slips to position to grip the liner, the springv means including a stop member carried by the body and springs arranged between the stop member and slips.

7. A device for use in a cylinder having a liner and a piston rod extending into it, said device including a body, means for connecting the body and rod for limited relative movement whereby the body can be jarred by operation of the rod and liner engaging means carried by the body, said connecting means including a slidable connection between the body and rod and stop means on the rod to limit thesliding movement.

8. A device for use in a cylinder having a liner and a piston rod extending into it, said device including a body slidably fitting the rod, means on the rod to limit the sliding movement between the rod and body so that the body can be jarredt'rom the rod, and means for connecting the body with the liner.

9.Y A device for use in a cylinder having a liner and a piston rod extending into it, said device including a body slidably fitting the rod, means on the rod to limit the sliding movement between the rod and body so that the body can bejarred from the rod, and slips for connecting the body with the liner.

10. A device for use in a cylinder having a liner and a piston rod extending into it, said device including a body to be mounted on the rod, mea-ns whereby the body can be jarred by operation of the rod, and means for connecting the body with the liner.

11. A device for use in a cylinder having a liner and a shoulderedy piston rod extending into it, said device including a nut applied to the rod in spaced relation to the shoulder on the rod, a body mounted on the rod slidable between the shoulder and nut, rod slidable between the shoulder and nut, and means for connecting the body with the means for protecting the shoulder, ,u and 10 liner. means for connecting the body With the 12. A device for use in a cylinder having; liner. a liner and a shouldered piston rod extend- In Witness that I claim the foregoing I ing into it, said device including a nut aphave hereunto subscribed my name thisl7th plied to the rod in spaced relation to the day of February, 1925. shoulder on the rod, a body mounted on the THOMAS J. PICOS.

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