US3727291A

US3727291A - Universal press

Info

Publication number: US3727291A
Application number: US00127711A
Authority: US
Inventors: R Babb
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-03-24
Filing date: 1971-03-24
Publication date: 1973-04-17
Anticipated expiration: 1990-04-17

Abstract

A press consisting of a frame, an anvil mounted on the frame, a plunger mounted on the frame for movement to and from the anvil, and means mounted on the frame for movement of the plunger to and from the anvil. The means for moving the plunger frictionally grips the plunger and is provided with one handle which positively moves the plunger toward the anvil and another handle which positively moves the plunger away from the anvil.

Description

United States Patent [191 Babb [ 1 UNIVERSAL PRESS [75] Inventor: Randall K. Babb, Newark, Calif.

[73] Assignee: Anthony J. Randazzo and Randall K. Babb, part interest to each [22] Filed: Mar. 24, 1971 [2]] App]. No.: 127,711

[52] US. Cl. ..29/25l, 29/267, 100/280, 254/106 [51] Int. Cl. ..B23p 19/02 [58] Field of Search ..29/25 1 267; 100/280; 254/106 [5 6] References Cited UNITED STATES PATENTS 2,718,253 9/1955 Zinke ..29/267 X [451 Apr. 17, 1973 Pendley ..29/267 X Murphy .29/25l X Primary Examiner-Granville Y. Custer, Jr. Assistant Examiner-.1. C. Peters Att0rney-Milmore & Cypher [57] ABSTRACT A press consisting of a frame, an anvil mounted on the frame, a plunger mounted on the frame for movement to and from the anvil, and means mounted on the frame for movement of the plunger to and from the anvil. The means for moving the plunger frictionally grips the plunger and is provided with one handle which positively moves the plunger toward the anvil and another handle which positively moves the plunger away from the anvil.

3 Claims, 3 Drawing Figures PATENTEBAPRIYIBYS 3,727 291 F I G l INVENTORZ RANDALL K. BABB m BY; M

HIS ATTORNEYS UNIVERSAL PRESS BACKGROUND OF THE INVENTION This invention is particularly adapted for automotive and other engine repair shops. In the repair of engines and transmissions it is necessary to replace sleeves which are force fit within other parts. Such sleeves are extremely difficult to remove and replace without some mechanical means. Presently available presses lack the ability to ease of on the pressure once it is obtained.

Tooth driven presses are available but are subject to breakage by too great input of force.

Hydraulic presses are available but are expensive and man" are too slow in that they require considerable pumping to position the ram.

SUMMARY OF THE INVENTION The gist of the invention is the combination of a frame and an anvil with a manually powered means which frictionally grips a plunger but is not otherwise mechanically connected thereto.

An object of the present invention is to provide a universal press which is relatively inexpensive, yet is durable.

Another object is to provide a universal press which will apply a large force either slowly or quickly to the part being operated upon.

A still further object is to provide a press which will ease of on the pressure, without completely releasing the pressure.

Still another object is to provide a universal press which is constructed from readily available parts.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation of the universal press constructed in accordance with the present invention.

FIG. 2 is a rear elevation of the press shown in FIG. 1.

FIG. 3 is an enlarged viewof a portion of the device shown in FIG. 1;

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention consists briefly of a frame 1, an anvil 2 mounted on the frame, a plunger 3 mounted for reciprocation on the frame for movement toward and away from the anvil, first means mounted on the frame frictionally gripping the plunger for movement of the plunger toward the anvil; the first means including a manually engageable first handle 6 moveable between a first and a second position; and locking means preventing movement of the plunger in the first posi- 1 tion of the handle and permitting movement of the plunger in the second position of the handle The invention may also consist of a second means mounted on the frame frictionally gripping the plunger for movement of the plunger away from the anvil. The second means includes a manually engageable second handle 11 moveable between a first and a second position. The locking means prevents movement of the plunger in the first handle position and permits movement of the plunger in the second handle position.

The above set forth first means further includes a first gripping member 12 encircling the plunger and a lever arm 13 extending outwardly from the first gripping member. A first cam 14 mounted on the first means engages the lever arm 13. m

The locking means 16 encircles the plunger and a first lever arm 17 extends outwardly from the midportion and a second lever arm 18 extends out.from the other side of the member 16. A stop means 19 is mounted on the C shaped member for engagement with the second arm 18. A second gripping means 21 encircles the plunger and a lever arm 22 extends therefrom. A second cam member 23 is pivotally connected to the distal end 26 of the lever arm 22 of the second gripping means. The second handle 11 is operatively connected to the second cam member 23 for movement of the cam against the first lever arm 17 of the locking member 16.

The first means set forth above includes a C shaped member 31 which is connected to the frame and includes a lower member 32 encircling the plunger and an upper member 33 spaced from the lower member encircling the plunger. A first spring means 36 biases the locking member away from the. lower member 32 and a second spring means 37 biases the second gripping member 21 away from the first gripping member 12. i

The frame 1 may be constructed in various configurations so long as the plunger is spaced from the part to be worked upon and there is sufficient space between the frame supports to hold a reasonable sized object. As here shown, the frame consists of a pair of horizon tally positioned

channel members

41 and 42 which form the anvil or member against which the plunger works. The anvil is connected directly to

upright channel members

43 and 44 as by welding or bolting. A channel member spans the distance between the two upright channels and is connected thereto. The channel member is designated by the number 46 and contains an opening 47 therein to permit passage of the plunger 6. The C-shaped member 31 is connected to the upper horizontal channel at a point surrounding opening 47. Two

struts

48 and 49 are joined to the outer ends of the upper horizontal member and to the upper end of the C-shaped member The work piece is placed on the anvil as shown in FIG. 2. Many different parts may be worked upon. For purposes of illustration only, the drawings show a Ford Cruisamatic transmission clutch drum 51 with a sleeve 52 being inserted into opening 53. It is desirable to place an insert 54 having a shoulder 55 for registering with the top of the sleeve and a protrusion 56 for insertion into the opening in the sleeve.

The handles 6 and 11 may be separate members slidable into sockets in the ends of stub members 57 and 58 respectively or they may be constructed integrally with the stub members. 2

The upper handle is pivotally attached to the C member as by pivot pin 61. The cam 14 formed on the stub member 57 engages a cam follower which ishere shown as a roller 62 mounted for rotation on axis 63.

Gripping member 12 is formed with an opening 71 therethrough which is dimensioned to be slightly larger than the diameter of the plunger 3. Thus, the gripping member is permitted to rock in a forward or rearward direction so as to be at an angular relationship with the plunger so as to frictionally bind the plunger in locking arrangement at opposite sides of the opening 71.

Second gripping member 21 is likewise formed with an opening 72 which is larger than the diameter of the plunger 3 and thus rocks and frictionally binds the plunger in the same manner as the gripping member 12.

The locking member 16 also is formed with an opening 73 which grips and binds the plunger in the same manner above described.

The operation of the press is as follows: The part to be pressed is placed on the anvil 2 and an insert or block 54 is placed between the work and the bottom 74 of the plunger. The bottom of the plunger is brought into contact with the insert or in some cases directly with the piece to be worked upon by rapidly moving handle 11 to cause the plunger to move downwardly. After the plunger or insert contacts the work, pressure is brought to bear in the following manner: Handle 6 is manually moved downwardly thus causing member 57 to pivot about point 61. Cam 14 is brought into contact with roller 62 which causes the lever 13 to be depressed against the biasing force of spring 37. Spring 37 is compressed permitting only limited travel of gripping member 12 downwardly. As the handle 6 moves downwardly and cam 14 forces lever 13 to drop so that the pivot end 63 is below the mid portion of the gripping member, the sides of the opening in the gripping member grip the plunger in a tight frictional grip. Since the C member is attached to the frame, the gripping member 12 forces the plunger downwardly. It is to be noted that downward movement is permitted because the

members

21 and 16 are unlocked by the following chain of events. Spring 37 permits gripping member 12 to travel downwardly until the wheel 62 comes in contact with a cam surface 76 on member 58 thus causing handle 11 to be depressed, and lowering lever end 22 so that it is substantially horizontal and does not frictionally grip the sides of the plunger. In like manner, cam 23 moves against lever 17 causing a lowering of the end so that it too is not in frictional grip with the plunger.

When handle 6 is raised, the reverse of the chain of events above described occurs. The main point is that as'the cam 23 backs off lever 17, end 77 oflever arm 17 is pushed upwardly by the force of spring 36. Since stop 19 prevents end 78 of lever arm 18 from rising, the locking member 16 becomes angularly related to the plunger and the sides of the opening 73 grip the plunger and prevent the plunger from backing off from the work piece. The cycle is repeated until the plunger is lowered sufficiently to accomplish the work required.

In order to release the plunger from the work piece, lever arm 11 is depressed, forcing cam surface 23 into engagement with looking member 16. The cam forces end 77 downwardly, thus releasing member 16 from gripping the plunger. At the same time, end 18 comes in contact with stop 19 and spring 36 is depressed against the lower end of the C" member thus limiting further travel of lever arm 17. As the handle continues to be depressed, the movement of the cam 23 against lever 77 forces end 26 of gripping member 21 upwardly. The sides of the opening 72 grip the plunger and move it upwardly as the arm 11 is further depressed. Raising of the lever arm causes a reversal of the parts as follows: The cam 23 is so formed that gripping means 21 remains in frictional grip with the plunger until the handle is almost to the fully raised position. Just as the frictional grip of means 21 is lost with the plunger, the cam comes off lever 17 and the biasing force of spring 36 raises end 77 thus causing locking means 16 to grip the plunger as above described. Repeating of the lowering of arm 11 causes a repeat of the cycle and causes the plunger to move upwardly.

lclaim:

l. A press comprising:

a. aframe;

b. an anvil mounted on said frame;

c. a plunger mounted for reciprocation on said frame for movement toward and away from said anvil;

first means mounted on said frame frictionally gripping said plunger for movement of said plunger toward said anvil;

e. said first means including a manually engageable first handle moveable between a first and a second position;

f. locking means preventing movement of said plunger in said first handle position and permitting movement of said plunger in said second handle position;

g. second means mounted on said frame frictionally gripping said plunger for movement of said plunger away from said anvil;

. said second means including a manually engageable second handle moveable between a first and a second position; and

i.. said locking means preventing movement of said plunger in the first handle position of said second handle and permitting movement of said plunger in said second handle position of said second handle.

. A press as described in claim 1 comprising:

a. said first means including a first gripping member encircling said plunger and a lever arm extending outwardly from said first gripping member;

. a first cam mounted on said first means for engagement with said lever arm;

c. said second means including a second gripping member encircling said plunger and first and second lever arms extending outwardly from said gripping member;

. said locking means encircling said plunger and having a lever arm;

e. stop means mounted on said first means for engagement with said locking arm;

f. a second cam member pivotally connected to the distal end of said first lever arm of said second gripping member; and

g. said second handle being operatively connected to said second cam member for movement of said cam against said lever arm of said locking member.

. A press as described in claim 2 comprising:

a. said first means including a C" member connected to said frame and including a lower member encircling said plunger and an upper member spaced from said lower member encircling said plunger;

. first spring means biasing said second gripping member away from said lower member; and

c. second spring means biasing said second gripping member away from said first gripping member.

Claims

1. A press comprising: a. a frame; b. an anvil mounted on said frame; c. a plunger mounted for reciprocation on said frame for movement toward and away from said anvil; d. first means mounted on said frame frictionally gripping said plunger for movement of said plunger toward said anvil; e. said first means including a manually engageable first handle moveable between a first and a second position; f. locking means preventing movement of said plunger in said first handle position and permitting movement of said plunger in said second handle position; g. second means mounted on said frame frictionally gripping said plunger for movement of said plunger away from said anvil; h. said second means including a manually engageable second handle moveable between a first and a second position; and i. said locking means preventing movement of said plunger in the first handle position of said second handle and permitting movement of said plunger in said second handle position of said second handle.

2. A press as described in claim 1 comprising: a. said first means including a firSt gripping member encircling said plunger and a lever arm extending outwardly from said first gripping member; b. a first cam mounted on said first means for engagement with said lever arm; c. said second means including a second gripping member encircling said plunger and first and second lever arms extending outwardly from said gripping member; d. said locking means encircling said plunger and having a lever arm; e. stop means mounted on said first means for engagement with said locking arm; f. a second cam member pivotally connected to the distal end of said first lever arm of said second gripping member; and g. said second handle being operatively connected to said second cam member for movement of said cam against said lever arm of said locking member.

3. A press as described in claim 2 comprising: a. said first means including a ''''C'''' member connected to said frame and including a lower member encircling said plunger and an upper member spaced from said lower member encircling said plunger; b. first spring means biasing said second gripping member away from said lower member; and c. second spring means biasing said second gripping member away from said first gripping member.