US2618053A

US2618053A - Bushing puller

Info

Publication number: US2618053A
Application number: US38999A
Authority: US
Inventors: Claps Michael
Original assignee: HARRY D OWEN
Current assignee: HARRY D OWEN
Priority date: 1948-07-16
Filing date: 1948-07-16
Publication date: 1952-11-18
Anticipated expiration: 1969-11-18

Description

Nov. 18, 1952 M. cLAPs I BUSHING FULLER Original Filed March 4, 1946 INVENTOR. Mic/zae/ C /o 0s BY W Arron/Er Patented Nov. 18, 1952 Michael Glaps;.Denver, 6610:, assignor tu llanr-yynaowen, Denver, Colo.

Continuation: of application Serial; Nth. 651325;

Sofia/1N6. 383999 1. .Claim-.

Thi'szapplieatibnz is? a clinfinuatihn' of: ape pflicatiom *NQLL 651,725; filed-March 4;; 19116. 5, nowe ab andoned for; amimprovementim bushing}: Ruler.

The; invention; relates.- to. bushing; pullers.- and more particularly to-one which: is? well adaptedforlpulling biind bushingsi One=oi the-objects of.- thelinvention'is to produceza bushingpuller whiehisisimple and sturdy invconstructionn economical to manufacture and eflicientlinuse.

Another obiectflis tozproduce. a-bushing puller which doesinot. employvv expansible resilient pulling fingers thusl eliminatin expensive material and'manufa-cturing costs.

A-iurther ObjB'GU-i-SwtO produce a bushing puller which is provided with independent pulling elements that can: bes readi-ly;raplacedf t low cost in event of breakage or damage andithereby provide for'a considerable savings over; the purchase. price of a complete new puller.

Other objeets of my-inventien-will-become apparent-from the following; description takenin connection with the accompanying drawings. showing a preferred bushing-g, puller construction:

In the drawings:

Figures 1 15:13, perspective View of the bushing puller; V

Figures 2. is a view of the puller withtzpartsi brokenaw-ay; and in sectionto? show details: or construction; and manner of cooperatiomoff the: parts; t

Figure 3 is a. view of one of the pulling members; and

Figure 4 is a view showing the puller in readiness topull a blind bushing.

Referring to the drawings in detail, it will be noted that my improved bushing puller comprises essentially four parts, namely, a rod or shaft I, a nut or block 2 and two pulling

members

3 and 4. The red I is provided intermediate its ends with threads 5 and at its outer end has associated therewith a turning handle 6 in the form of a slidable cross rod. The inner end of the rod which is adapted to engage a suitable abutment is formed with a bevel I, the purpose of which will become apparent.

The nut or block 2 is formed with a threaded bore 8 at its outer end which communicates with a, larger smooth wall bore 9 at its inner end. The block or nut is arranged to be mounted by means of its threaded bore on the threads 5 of the rod.

The two

bushing puller members

3 and 4 are of like construction, being of slightly less curvappli'cation Jlllyl 1651948 type of" slot? I I. having its open" side extending-';

toone edge ef -the member; These-slots l.l:- are: arrangedto receivepins l2 carriedby theblock or nut.- The=pii1s are:diametricallyppposed to each other andthe inner ends thereof extend into the bore 9 substantially the distance;- oiz: the; radial 'thiclin'es's of the pullingmembers' 3 and. 4% The sizeof 'the pins: l2 issuchthat when'thet

members

3 and 4 have the rod 5 received there s between" the pins can slide in thespaces: be *"tween the adjacent longitudinal" edges of the" members and to a positionwhere they can be received in the s1ots- H Icya"- remnve movement between the' memb'ers' and the nut-or block- 2.

Hr using the improved bushing puller the two pulling; members- 3 -a-nd 4 am first inserted into the-bushing 13 which, as shown in Figuree, may be'of the' blin d t'y-pe and moun'tediiia bore of a support M such as a hou-sing. lonesome-met that the pulling members 3 and f are of less curvatu'relength than'asemi-cylinder, they} can be placed with their-adjacent longitudinal" edgesin engagement soas to-allow for the'fianges' N to pass through the bushing into the space at the inner end thereof. After the pullin members are inserted, the inner end portion of the rod I is inserted between the members and due to its size it thereby causes the members to be expanded so that the flanges I0 will assume positions where they can engage behind the inner end edge of the bushing as indicated in Figure 4. The beveled edge I at the inner end of the rod assists in inserting the rod in between the two pulling members. As the rod is inserted, the other ends of the pulling members will be received in the smooth large bore 9 of the nut or block and since the

members

3 and 4 are new in their spaced apart positions, the pins '2 of the nut can be received in the space between the adjacent longitudinal edgesof the

members

3 and 4 and assume positions opposite the slots I I. The nut can then be twisted so that these pins l2 are moved into the slots to establish a connection between the nut and the pulling

members

3 and 4. To pull the bushing all that need now be done is to turn the rod I so as to feed it through the nut or block. The inner end of the rod will engage the end wall of the housing bore in which the bushing 13 is mounted and, consequently, as the rod is turned, the nut or block will be moved longitudinally outwardly with respect to the rod and pull with it the pulling

members

3 and 4. Since the flanges H) of these members are positioned behind the inner end edge of the bushing, the bushing will be pulled outwardly and thus be removed from the bore of the support. If the bushing to be pulled is in a bore open at both ends, a suitable abutment can be made for the beveled end of the rod to engage.

In connection with my improved bushing puller, it is to be particularly noted that it is very simple in construction and that the parts thereof can be easily and economically manufactured. I am aware that bushing pullers have been previously made, in which integral pulling members or fingers are carried by a nut or block similar to the nut or block 2, but in such type of puller the nut and fingers must be made of cost- 1y material in order that the fingers can be resiliently attached to the nut. the pulling

members

3 and 4 integral with the nut, the cost of manufacturing is considerably increased as many machining operations must be performed. By having the

pullin elements

3 and 4 made separately from the nut, they can be readily replaced at a low cost in the event the pulling members become damaged or broken. The replacement cost Will be considerably less than the cost of buying a complete new tool, or an integral nut and finger, as would be the case where the bushing puller was constructed with the nut and the pulling members made from one piece. The material for making my improved bushing puller need not be expensive, as there is no necessity for the pulling members to be resilient to permit expansion.

Being aware of the possibility of modifications in the particular bushing puller shown and described withcut departing from the fundamental principles of my invention, I desire it to be understood that the invention is not to be limited in any manner except in accordance with the appended claim.

What is claimed is:

In a puller for a bushing having a rear end edge free of any obstacle, said puller comprising two unitary independent elongated members Also, by having of semi-cylindrical shape provided at corresponding ends with shoulder means for engaging the rear end edge of the bushing to be pulled, a single rod of greater length than the members and having a uniform diameter portion for insertion between the members, said rod and members being so related that'when said members are placed within a bushing with the shoulder means beyond the rear end edge of the bushing and the rod subsequently inserted between the member said members will be expanded uniformly throughout their length and the shoulder means will be held without wedging action so as to engage at the rear end edge of the bushing and the ends of the members opposite those with the shoulder means will be supported by the rod, a member threaded on the rod and having a cylindrical flange for surrounding said other end of the members to limit their expansion, and interengageable means comprising pins carried by the annular flange of the threaded member and slots in the sides of the independent elongated member for quickly connectin and disconnecting said members by relative turning movement of the threaded member with respect to the elongated members after the pins are inserted between spaced longitudinal edges of the said members and the single rod has been given a longitudinal movement inwardly relative to the elongated members to cause them to be expanded and held with their shoulder means positioned to engage the rear edge of the bushing, said pins being the sole connection of the elongated members and other parts of the bushing puller thus permitting easy hand removal.

MICHAEL CLAPS.

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

UNITED STATES PATENTS Number Name Date 1,367,016 Campbell Feb. 1, 1921 1,464,693 Campbell Aug. 14, 1923 1,496,303 Dieringer June 3, 1924 1,504,650 Smith Aug. 12, 1924 1,515,247 Forsyth Nov. 11, 1924 1,569,614 Clark Jan. 12, 1926 2,305,076 Graham Dec. 15, 1942 2,380,980 Looney Aug. '7, 1945