US2628420A - Sleeve extractor - Google Patents

Description

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Feb. 1'7, 41953 Patenied Feb. 17, 1953 UNITED STATES PATENT oFFlcE i 2.628.420 SLEEVE ExrRAcroR Edwin E. Skilling, Chula Vista, Calif., assignor to International Tool Corporation, Chula Vista, Calif., a corporation of California Application August 16, 1948, Serial No. 44,507

4 Claims.

1 This invention relates to means for extracting Sleeves from bodies, such as motor blocks, etc., and embodies certain improvements over means for a similar purpose shown in'Patent Number 2,547,345, granted to me on April 3, 1951.

An object of the present invention is to provide a simple, economical, and satisfactory hydraulically operable mechanism affixed to the cylinder of a ram and adapted together with said cylinder to be inserted into the bore of a sleeve carried by a body to an extent which, when elements are disposed below or beyond an opposite end of the sleeve to that in which the unit is inserted, and said elements are expanded sufciently to engage the adjacent end of the sleeve, will, upon application of pressure to the ram, eiectually and quickly remove the sleeve from the body.

More specifically, the invention contemplates the provision of a portable extractor unit including a cylinder, a uid pressure operated ram slidable therein, and an extractor head carried by the cylinder and embracing a cylindrical expander and a multiple fingered extractor releasably adjustable on the cylinder and by reason of such adjustment and the engagement of cooperating parts of the expander and extractor, the extractor is expanded to and retracted from position of operative engagement with a sleeve to be removed.

Another object of the invention is to so arrange the expander and extractor on the cylinder that one of said elements may be anchored to the cylinder while the other element is rotatively and axially adjustable on the anchored element.

A further object is to provide detachably one or both elements of the extractor head on the cylinder.

A still further object is to provide theextractor and expander elements with interengaging frusto-conical annull, one of which is integral and the other composed of a plurality of like Sections at the termini of tensioned iingers cut on a common Sleeve body, whereby the axial adjustment of the tensioned sections of one element over the frusto-conical annulus of the other element will eiiect the expansion and retraction oi the lingers.

Other objects will appear as the description of the structure and operation of the disclosed mechanism progresses. p

A preferred form of mechanism is shown in the annexed drawings, in which:

Fig. 1 is a small scale elevational view of a suitable primary power unit and the instant extractor unit operatively associated for carrying out sleeve extracting and other operations;

Fig. 2 is a sectional elevation of a sleeve bearing body such as a motor block in which the portable extracting unit is operatively mounted for removing a sleeve, the extracting unit and portions of a hydraulic cylinder and ram being shown in section;

Fig. 3 is an external view of the extracting unit; and

Fig. 4 is a transverse view of the same on line 4 4 of Fig. 2.

Referring particularly to Fig. l, there is shown a primary power unit M and a portable secondary applicator unit S operatively connected as and for the purpose of removing sleeves from supporting bodies. The unit M includes a large cylinder C having a plunger D movable therein by air pressure from a source through an inlet 5. Plunger D has a stem D1 extended therefrom into a hydraulic cylinder I and a piston Dz is fixed to said Stem for movement in cylinder I as plunger D is moved by air pressure.

Cylinder I has a head I which is connected by a flexible tube I2 with an inlet I I of head I and with unit S as by means of an inlet I0. Unit S includes a cylinder S1, a head S2 preferably welded as at I3 to said cylinder, a piston S3 slidable in the cylinder, and a tubular stem Si to which is affixed a foot S7 beyond the open lower end of the cylinder. Head Sz has'an extension I4 which is bored at I5 for the passage of fluid from a radial port I6 leading from tube I2 into and from the cylinder Si above piston S3 as said piston is moved downwardly and upwardly on reverse strokes.

An elongated telescoping sleeve S5 is telescopically iitted over cylinder S1 and is formed with an external annular ange I1 at its lower end to which is welded, as at I8, the upper end of a cylindrical extractor E whichn is longitudinally slit at uniformly spaced points I9, I9, etc. to form a plurality of tensioned nger sections 20, 20, etc. The sections 2l! combine to form a multiple split annulus 2l with frusto-conical inner surfaces 22 having their major dimensions at their lower margins and the minor dimensions at their upper margins thereof.

A cylindrical expander E is telescopically fitted over cylinder S1 and is formed with an upper externally threaded section 13, a lower annulus 24 having internal threads 3,5 screwed onto'the externally threaded lower end portion 26 of cylinder S1 and of frusto-conical cross Section, as shown in Fig. 2, to provide a tapered outer surbearing against and cooperating with said expander head whereby said nger terminals are expanded and retracted in response to the axial movement of the extractor, for, respectively, engaging the nger terminals with a sleeve to be extracted and normal positions of disengagement With such sleeve, said expander head being internally threaded for attachment to said cylinder and externally threaded for attachment to the extractor, whereby while the exp-ander is held stationary on the cylinder the extractor may be rotatably adjusted on the expander to eiect corresponding axial adjustment of the extractor relative to the expander, and means borne by said cylinder for operating the extractor.

EDWIN E. SKILLING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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