US2524698A - Pulling tool - Google Patents
Pulling tool Download PDFInfo
- Publication number
- US2524698A US2524698A US634225A US63422545A US2524698A US 2524698 A US2524698 A US 2524698A US 634225 A US634225 A US 634225A US 63422545 A US63422545 A US 63422545A US 2524698 A US2524698 A US 2524698A
- Authority
- US
- United States
- Prior art keywords
- cam
- jaws
- screw
- tool
- pulling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53796—Puller or pusher means, contained force multiplying operator
- Y10T29/53848—Puller or pusher means, contained force multiplying operator having screw operator
- Y10T29/53857—Central screw, work-engagers around screw
- Y10T29/53861—Work-engager arms along or parallel to screw
- Y10T29/5387—Pivotal arms
Definitions
- Patented Oct. 3, 1950 PULLING TOOL Walter J. Felton, Mankato, Minn., assignor to Truth Tool Company, Mankato, Minn.
- This invention relates to a tool designed for pulling gears, collars, or the like from shafts, studs, etc.
- a further object is to provide a cam action for insuring quick application of the tool to the work and whereby the tool will be maintained in engagement with the work during the stripping operation.
- Another object is to provide a tool utilizing a cam which is rotatable for the purpose of exerting a pull upon the engaged part without, at the same time, subjecting the pivots and other parts of the tool to excessive transverse strains.
- FIG. 1 is a front elevation showing the tool as applied to the work, a crosshead and cam embodied in the invention being shown partly in section.
- Figure 2 is a top plan view thereof.
- l designates a cross head having forked ends 2 through which are extended pivot bolts 3.
- Opposed arms 4 are mounted on these bolts within the respective forks and these arms converge at one end and terminate in stripping jaws 5 which are extended toward each other.
- a thrust screw 6 threadedly engages the middle portion of the cross head I and is provided at one end with a pointed stud 1 while the other end has a head 8 adapted to be engaged by a wrench or the like.
- a cam 9 is mounted for free rotation on the bolt 6 and has oppositely disposed portions II] that have arcuate side walls offset or eccentrically positioned relative to the axis of the screw 6, thus to reduce progressively the diameter of the cam 9. This is best shown in Figure 2. These oppositely disposed portions in are also formed with inclined upper faces I l constituting cam surfaces.
- cam 9 Under normal conditions the cam 9 is positioned with the low portions thereof under the jaws l2 and as these low portions are located where the cam is of smallest diameter it will be obvious that with the cam thus positioned the arms 4 can be freely swung to move the jaws 5 apart, because the side walls and cam surfaces of cam 9 will be spaced away from adjacent portions of the arms 4 and jaws I2 respectively a distance sufficient to permit this swinging.
- cams do not move freely but are in engagement with the threads of the feed screws and are held in place by them.
- the present invention is designed to overcome these difiiculties by providing a cam which, as before stated, is not held in position by the screw threads and does not exert a lateral thrust against the pivotal arms.
- a pulling tool including a, crosshead, a thrust screw threadable through the middle portion thereof, opposed arms pivoted between their ends.
Description
Oct. '3, 1950 w,J FELTQN 2,524,698
PULLING ,TOOL
Filed Dec. 11, 1945 9' WJIZeZZam INVENTOR.
BY Z
Patented Oct. 3, 1950 PULLING TOOL Walter J. Felton, Mankato, Minn., assignor to Truth Tool Company, Mankato, Minn.
' Application December 11, 1945, Serial No. 634,225
1 Claim. 1
This invention relates to a tool designed for pulling gears, collars, or the like from shafts, studs, etc. I
It is an object of the invention to provide a simple and compact tool which can readily be applied to the work and, after being applied, can be actuated easily for the purpose of stripping the engaged parts from each other.
A further object is to provide a cam action for insuring quick application of the tool to the work and whereby the tool will be maintained in engagement with the work during the stripping operation.
Another object is to provide a tool utilizing a cam which is rotatable for the purpose of exerting a pull upon the engaged part without, at the same time, subjecting the pivots and other parts of the tool to excessive transverse strains.
With the foregoing and other objects in view, which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.
In the accompanying drawing the preferred form of th invention has been shown.
In said drawing Figure 1 is a front elevation showing the tool as applied to the work, a crosshead and cam embodied in the invention being shown partly in section.
Figure 2 is a top plan view thereof.
Referring to the figures by characters of reference, l designates a cross head having forked ends 2 through which are extended pivot bolts 3. Opposed arms 4 are mounted on these bolts within the respective forks and these arms converge at one end and terminate in stripping jaws 5 which are extended toward each other.
A thrust screw 6 threadedly engages the middle portion of the cross head I and is provided at one end with a pointed stud 1 while the other end has a head 8 adapted to be engaged by a wrench or the like. A cam 9 is mounted for free rotation on the bolt 6 and has oppositely disposed portions II] that have arcuate side walls offset or eccentrically positioned relative to the axis of the screw 6, thus to reduce progressively the diameter of the cam 9. This is best shown in Figure 2. These oppositely disposed portions in are also formed with inclined upper faces I l constituting cam surfaces.
Those portions of the arms 4 remote from the stripping jaws 5 are extended across diametrically opposed portions of the cam 9 and have inwardly extending pulling jaws I2 which overlie the respective cam surfaces 8 I.
Under normal conditions the cam 9 is positioned with the low portions thereof under the jaws l2 and as these low portions are located where the cam is of smallest diameter it will be obvious that with the cam thus positioned the arms 4 can be freely swung to move the jaws 5 apart, because the side walls and cam surfaces of cam 9 will be spaced away from adjacent portions of the arms 4 and jaws I2 respectively a distance sufficient to permit this swinging.
In practice, and with the cam positioned as described immediately above, the screw 6 is fed lengthwise within the cross head I until the jaws 5 can be placed under the part C to be pulled. The screw and the jaws 5 will now have been positioned roughly as in Figure 1, with the jaws 5 under part C and stud 1 applied to the end of the part S. Screw 6 is tightened until the stud and the jaws firmly engage the respective parts S and C after which the cam 9, which is rotatable freely on the screw 6, is rotated. The cam faces II are thus brought into tight engagement with the jaws [2 so that the cam serves as a wedge between jaws l2 and cross head I without, however, exerting any spreading action against the adjacent portions of the arms 4, since even at its point of greatest diameter, its side walls are still spaced from the adjacent surfaces of the arms 4. By subsequently rotating the screw 6 the cross head, with the cam 9 wedged between the crosshead and jaws I2, is fed along the screw, thereby causing the jaws 5 to pull on the art C while thrust is being exerted against the part S.
Importance is attached to the fact that cam 9 slides freely on the screw and, when rotated, does not exert a spreading action. It is merely a means for tightly filling the space between jaws l2 and the cross head, so that the pulling thrust extends from jaws 5 through arms 4, jaws l2, and cam 9, to the crosshead and screw. Consequently the pivot bolts 3 are not subjected to any transverse strain tending to bend or otherwise injure them. It is well known to those skilled in the art that pulling tools as heretofore constructed produce strain and wear on the pivot bolts and cause the parts to lock to such an extent that the thrust screw loses much of its effectiveness. Furthermore, in other types of pullers using cams or similar devices, said cams do not move freely but are in engagement with the threads of the feed screws and are held in place by them. The present invention is designed to overcome these difiiculties by providing a cam which, as before stated, is not held in position by the screw threads and does not exert a lateral thrust against the pivotal arms.
It will be noted that where the outermost portions of the cam terminate, there are provided radial shoulders l3 which permit gripping of the cam by the users hand for the purpose of rotating it to wedging position. These shoulders also provide surfaces against which a hammer or the like can be tapped for the purpose of tightening the cam when moved into wedging or chocking position.
What is claimed is:
A pulling tool including a, crosshead, a thrust screw threadable through the middle portion thereof, opposed arms pivoted between their ends.
to the ends of the crosshead, a stripping jaw and a pulling jaw at the respective ends of each arm, each of said jaws having an engaging surface in a plane substantially at right angles to its arm, and means wedgeable between the crosshead and pulling jaws and constituting a medium through which the force of said screw may be transmitted REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,259,036 Mitchell Mar. 12, 1918 1,376,340 Klay Apr. 26, 1921 1,471,259 Good Oct. 16, 1923 1,519,067 Smith Dec. 9, 1924 1,732,696 Ridenour Oct. 22, 1929 1,827,475 Keefer Oct. 13, 1931
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US634225A US2524698A (en) | 1945-12-11 | 1945-12-11 | Pulling tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US634225A US2524698A (en) | 1945-12-11 | 1945-12-11 | Pulling tool |
Publications (1)
Publication Number | Publication Date |
---|---|
US2524698A true US2524698A (en) | 1950-10-03 |
Family
ID=24542900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US634225A Expired - Lifetime US2524698A (en) | 1945-12-11 | 1945-12-11 | Pulling tool |
Country Status (1)
Country | Link |
---|---|
US (1) | US2524698A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4648166A (en) * | 1983-07-18 | 1987-03-10 | Tilman Paul L J | Claw extractor |
USD431985S (en) * | 1999-12-08 | 2000-10-17 | Yu-Lin Chen | Puller jaw |
USD989584S1 (en) * | 2021-07-26 | 2023-06-20 | Leon Griffin | Two-jaw puller |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1259036A (en) * | 1918-03-12 | Floyd Andrew Mitchell | Collar-removing tool. | |
US1376340A (en) * | 1920-05-19 | 1921-04-26 | Abraham B Klay | Wheel-puller |
US1471259A (en) * | 1922-01-27 | 1923-10-16 | Edward E Good | Gear puller |
US1519067A (en) * | 1923-03-24 | 1924-12-09 | Thomas G Smith | Tool for removing bolts, keys, etc. |
US1732696A (en) * | 1929-10-22 | ridenour | ||
US1827475A (en) * | 1929-10-29 | 1931-10-13 | Edward J Keefer | Battery terminal puller |
-
1945
- 1945-12-11 US US634225A patent/US2524698A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1259036A (en) * | 1918-03-12 | Floyd Andrew Mitchell | Collar-removing tool. | |
US1732696A (en) * | 1929-10-22 | ridenour | ||
US1376340A (en) * | 1920-05-19 | 1921-04-26 | Abraham B Klay | Wheel-puller |
US1471259A (en) * | 1922-01-27 | 1923-10-16 | Edward E Good | Gear puller |
US1519067A (en) * | 1923-03-24 | 1924-12-09 | Thomas G Smith | Tool for removing bolts, keys, etc. |
US1827475A (en) * | 1929-10-29 | 1931-10-13 | Edward J Keefer | Battery terminal puller |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4648166A (en) * | 1983-07-18 | 1987-03-10 | Tilman Paul L J | Claw extractor |
USD431985S (en) * | 1999-12-08 | 2000-10-17 | Yu-Lin Chen | Puller jaw |
USD989584S1 (en) * | 2021-07-26 | 2023-06-20 | Leon Griffin | Two-jaw puller |
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