US2609597A

US2609597A - Twin bushing puller

Info

Publication number: US2609597A
Application number: US763206A
Authority: US
Inventors: Claps Michael
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-07-24
Filing date: 1947-07-24
Publication date: 1952-09-09
Anticipated expiration: 1969-09-09

Description

Sept. 9, 1952 M. CLAPS 2,609,597

TWIN BUSHING FULLER Filed July 24, 1947 Fig. 3

IN VEN TOR. /'7/C///l 2 cur/ 5 Patented Sept. 9, 1952 UNITED STATES PATENT 40PM 7 2,609,597 7 I a a Michael Claps, Denver, 0010. Application July 24, 1947, Serial No. 763,206

This invention relates to bushing pullers and with the two-section form shown the stem secmore particularly to one which is adapted for the pulling of two bushings or equivalent members by one operation.

One of the objects of my invention is to pro- 2 Claims. (Cl. 29 265) duce a simple, inexpensive and efiicient bushing puller which is adaptedto simultaneously pull two axially spaced bushings or equivalent members of difierent size.

Another object is to produce a double bushing puller which employs simple pulling fingers not requiring resilient expansible means or other expensive structure. a V a r A further object is to produce a bushing puller of the type described in whichis embodied insociated with fluid couplings employed in automobile transmission systems.

Other objects of my invention will become apparent from the following description taken in connection with the accompanying drawings showing, by way of example, a bushing puller embodying the invention.

In the drawings:

Figure 1 is a perspective view of the twin bushing puller;

Figure 2 is a side view of the bushing puller with parts in section and broken away in order to show details ofconstruction;

I Figure 3 is a view showing the bushing puller in operation; and

Figure 4 is a detailed'side view of one of the pulling fingers.

Referring to the drawings in detail, the improved twin bushing puller which I have disclosed by way of example as embodying my invention comprises a stem 1 made of two

sections

2 and 3. The two sections are shown as of the same diameter and section 3 is provided with a reduced threaded inner end 4 which is arranged to be screwed into a threaded bore 5 in the inner end of the section 2 to couple the sections together. The outer end of this latter section 2 is formed with threads 6 over a substantial portion of its length and cooperating with this threaded portion of the stem is an elongated nut I having a hexagonal surface so that a wrench or other tool can be readily attached thereto to turn the nut. If desired, the two

sections

2 and 3 of the stem may be made as a single piece, but

angles to the longitudinal axis of tion -3 can be replaced by a similar, section of smaller or'larger" cross section to thereby condition th tool for a more universal use as will become apparent.

Arranged for positioning on the smooth part of the stem are two bushing pulling fingers 8and 9 of like construction which are shown in detail in Figure 4. Each of these finger'son'its inner surface is provided with a' "longitudinally extending groove ID, the surface of which is cylindricvhaving a radius of curvature'the same as the cylindrical surface of the stem. The outer surface of each finger has stepped cylindric surfaces II and H, the former having a greater radius of curvature than the latter'with both cylindric surfaces being concentric with the cylindric surface of the groove l0.' The inner end of the larger. cylindric surface ll has a shoulder I3 and the outer end of the smaller cylindric surface, I2 has a shoulder l4. These shoulders are employed toengage the end edges of the two bushings during therpulling thereof to be performed by the bushing puller. 'Adjacent the outer end of each finger having the larger cylindric surface there is provided a slot 15 which is slightly angular to aplane at right the finger as shown in various figures.

The

twofingers

8 and 9 are both formed to be somewhat less than a semi-cylinderso that when they are placed together with their grooves 18 in opposed relation, the shoulders 13 and [4 can be passed throughthebushings to be pulled and which havean'internalradi us of curvature of the cylindric surfaces Ill and "I2. "With such an arrangement it is'seen that after the shoulders are passed-through the bushings and the fingers are moved-apartthe shouldersfcanbecome placed behind the 'rear 'edges 'of the bushings. The previously referredtostem l provides the means for spreading the two pulling fingers after they are inoperative positions and for additionally functioning to maintain said fingers is their operative position, as can bereadily seen from Figures 1, 2 and 3.

The stem l is also employed for pulling 'the fingers in an axial direction so that the bushings can be removed and this is accomplished by means of a pin l6 extending transversely through the stem and extending from opposite sides of the stem so that it'canbe received in the slots I5 of 'the pulling 'finger'sf' In order that the lingers canflbe inaintained on the-stemwhen trates the tool being used in pulling two bushings simultaneously, there is shown ahousin structure 20 in section. This housing structureis provided with a large bore 2i and a smaller bore 22 in axial alignment with and at the rear of the larger bore. Positioned in the inner ends of these two bores on suitable seats are-bushings 23 and 24 which are employed to journal a shaft ingsLthe'tW'o fingers of the. illustrated improved twin' bushingpuller arefirstfplaced together with their grooves .10 in opposed relation. The fingers in thisrelationare then inserted through the open end of the outer larger bore 2| in the housin istructure after the shaft has been removed. The insertionis made test point where the shoulders l3 are slightly beyond the inner endsof the bushing 23. and the'shoulders [4 are slightly beyond. the inner .lend of the bushing 24, The fingers are now spreadapartan'd the stem l is insertedbetweehthe two fingersand through the grooves .lll so asto further spread the inner ends of the twofingers apart. and maintain the various .shouldersbehind theb'ushings .with which they are to cooperate. The stem. is s'ol'inse'rted that .the ends ofthepin l5 willpa'ssinto the 'spaces between the fingersMWhen thestem is inserted suificiently that the ends of} the 'pin'are opposite the open. ends of the slots 15' in the fingers, the

stem is turne ds'oias to place'jthe endsof the pin 16 in the slots and thus" connect"thefingersto the stem. .'I he sleeve ll is then next" slid over the ends of the finger havingi'the' larger cylindric surface. The puller is now in condition for pulling the bushingsand, to accomplish this all that needs "to. bedone isscrewup the nut 1,. The

hot will abut thebase portion ofv the bearing member I8 and the ends of theextensions l9-will be broughtlinto bearingengagement with the housing structure 20.. By applying a wrench to g the nut 1 l and 4 continuing to T turn it, it will be seen that the stem. willbe moved outwardly from the two bores in the housing. Since the fingers are connected to the stem by the bayonet joint connection comprising the pin and slots, the fingers also will be moved with the stem and consequently the shoulders l3 and I4 of each finger will engage behindthebushings and pull them outwardlyirom their bores. p

. s sn neth to t e t ns n 1. .0 th

bearing member. should beef such, length that the bushings can be pulled oflf their seats in the bores. Also, each finger should be preferably de signed so that the shoulders l4 thereof will engage the inner bushing 25 slightly prior to the outer bushing 23 during the pulling operation. With such an arrangement, it will only be necessary to start one bushing off its seat at a time and consequently less force will be necessary to be applied to the stem by the nut l.

From the foregoing description of the details of my twin bushing puller and the operation thereof, it is seen that a minimum number of parts is employed to accomplish the simultaneous pulling of two bushings of different size. No springs are embodied in the bushing puller and the pulling fingers are designed to be independent members readily insertable in the bores having the bushing mounted therein. The fingers are easily. connectable to the pulling stem. If damage sebum occur to either of the pulling fingers, anew pulling finger canbepurchased at asrnall costftorepair the tool. It willnot be necessary topurchaseia corriplete newtc'ol. Also, by'co'n structing the stem in'two parts,fp'art '3 'canbe removed at any time and be replacedby another part similar, to 3 but havinga Slightly 511 1841161 or greater diameter at the outer end thereof. When such is done the tool can'be adapted jior use'i'n pulling various sizes ofin'ner bushings 12d. 'In other Words, the extentto which the shoulders Hi can be'expended'can be varied by merely fimploying several stem parts 3 of different cross-section for attachment to the part2 'of'theste'm Being aware of the possibility of modification in, the particular bushing puller shown by 'way of example without separate from the fundamental principles of the invention; it is not intended that the scope of the invention belirnited in any manner except in accordance with the "appended claims.

What is claimed is; H V Y 1. In a bushing puller for'siinultai' eously pulling two-axially spacedjb'ush'ingsof different diameters or equivalent elements positionedin a housing structure, like "independent pulling 'fin'gers each of which is made'as'a singleintegral'piece and provided with longitudinally spaced shoulders for engaging the inner ends of the'bushing to be pulled and also being so constructed that the shoulder means can be passedthrough the bushing with which said means is to engage," a'stem oi uniform diameter positionable between the fingers to maintain by direct engagement with the fingers the shoulder'means thereof in" engagement with the bushingsjb'ayonet' jbintin'eans for detachably connecting the "fingers to -the Stem by a rotation of the stem only afte rsaid stem is positioned between the fingers,,and means including screw means cooperating with the'stem ior moving the fingers and. stem outwardly of the structure to th'ereby'shnultanecusly remove the bushings. 1

2. A punin 'fineer for use with a bus in puller rod having. aradially extendin pin 1&id finger comprising an elongated member provided with a groove having acylindriosurface for receiving the rod and twccuter g l dric w iters Qt d fe n radii of curvature. said outer sur flace. also being provided w th a bu hi e es c e a i (References in following page) 5 I 6 REFERENCES CITED Number Name Date The following references are of record in the 11504550 smith 1924 file of this patent: iggggg s 1926 6 ilson June 21, 1932 UNITED STATES PATENTS 5 2,257,318 Wilborn Sept. 30, 1941 Number Name Date 2,317,405 Rutten Apr. 27, 1943 413,700 Wood Oct. 29, 1889 2,421,324 Graham May 27, 1947 1,368,501 Huddle Feb. 15, 1921 1,424,261 Rudolph Aug. 1, 1922 FOREIGN PATENTS 1,479,583 Carey Jan. 1, 1924 10 Number Country Date 1,496,303 Dieringer June 3, 1924 207,412 Canada Jan-11, 1921