US2622389A - Link pivot removing tool - Google Patents

Link pivot removing tool Download PDF

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Publication number
US2622389A
US2622389A US197369A US19736950A US2622389A US 2622389 A US2622389 A US 2622389A US 197369 A US197369 A US 197369A US 19736950 A US19736950 A US 19736950A US 2622389 A US2622389 A US 2622389A
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United States
Prior art keywords
chain
arm
transverse
tool
rib
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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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US197369A
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George A Sjostrom
Theodore A Nyberg
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Individual
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    • 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
    • B25B27/04—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 inserting or withdrawing keys
    • 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
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/22—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning sprocket chains, endless tracks, antiskid chains
    • 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

Definitions

  • This invention relates to tools for severing sprocket chains, and more particularly to an improved implement for separating the links of a sprocket chain in an easy and rapid manner.
  • a main object of the invention is to provide a novel and improved lsprocket chain-severing tool which is very simple in construction, which is easy to use, and which is adapted to rapidly remove the connecting rivet employed between adjacent sets of links of a sprocket chain.
  • a further object of the invention is to provide an improved sprocket chain-severing tool which is relatively inexpensive to manufacture, which involves only a few parts, which is very sturdy in construction, and which enables a sprocket chain to be severed rapidly, whereby said sprocket chain may be repaired or varied'in length.
  • Figure 1 is a top plan View of an improved chain-severing too-l 'according to the present invention, showing a Vportion of' a sprocket chain mounted therein;
  • Figure 2 is a front end elevational View of the tool of Figure 1;
  • Figure 3 is a vertical cross-sectional view taken Aon the line 3 3 of Figure 2;
  • Figure 4 is a cross-sectional detail View taken on the line -li of Figure 3;
  • Figure 5 is a cross-sectional detail view taken on the line 5 5 of Figure 3;
  • Figure 6 is a fragmentary side elevational view of the chain-gripping portion of the tool of Figure l, said chain-gripping portion being shown in open position;
  • Figure l is a fragmentary perspective View showing the main portions of the tool of Figures 1 to 6, the clamping arm being shown separated from the 'body of lthe tool.
  • the chain-severing tool is designated generally at I I.
  • Said tool comprises a block member I2 to the bottom of which is rigidly secured a depending rigid handle loop I3.
  • the block member I2 is formed with a pair of spaced grooves i5 and I5 adapted to receive the side links of a standard sprocket chain, the grooves I5 and I5 defining therebetween a rib IB which is adapted to extend between the opposing side links of the sprocket chain above mentioned.
  • One side of the block member I2 is formed with the upstanding abutment member I1 which is formed with the transverse slot ,I8 defining the spaced, parallel, transverse rib 2 members I3, I9'.
  • the ri'b i5 is formed with a transverse central groove 20.
  • Designated at ⁇ 2I is an opstanding wall element extending parallel to the rib I5 and located at the forward'end of the block member I2.
  • is formed with a groove 22 of semicircular cross-section which is in alignment with the groove 2i! of the rib I3, as shown in Figure 7.
  • Designated at 23 is an arm having a shank portion 24 which is received between the transverse walls I9 and I9', and which is pivotally connected to said walls by a transverse pivot pin 25.
  • the arm 23 has a depending rib 26 adapted to engage the rib IG in overlying relation to the groove 2li and the end of the arm 23 is formed with a depending rib 2l adapted to engage the rib ZI in overlying relation to the groove 22.
  • Rib 23 is formed with a semicircular notch or groove 29 adapted to mate withthe semicircular notch 2B to define a seat for receiving the roller 33 of the sprocket chain at the point at which the chain is to be severed, as shown in Figure 3.
  • the rib 2l is formed with a semicircular notch 3
  • Designated at 32 is a tubular guide member which is formed with a reduced portion 33 extending transversely into and threadedly engaged in the block I2 at the abutment Il.
  • the shank portion 33 is formed with an axial bore 34 which is axially aligned with the semicircular notches 2Q and 22.
  • Designated at 35 is a rod member which is threadedly engaged inside an enlarged bore portion 36 provided in the tubular member 32, said rod 35 having rigidly secured thereto an axial pin member 37 which is slidably received in the bore 33.
  • crank handle 3S Secured to the ends of the rod 35 is a crank handle 3S which is rotatable to advance the rod 35 in the tubular member 32, whereby the pin 3l may be forced against the fastening rivet associated with the chain roller 33, thereby exerting axial thrust on the rivet.
  • the rivet shown at 39, may be forced out of the roller 30 through the opening donned by the mating notches 22 and 3 I.
  • Designated at BE is an arm rotatably mounted on the reduced portion 33 of the tubular member 32 between the block I2 and the shoulder defined between the main body portion of mem- 'ber 32 and the reduced portion 33 thereof.
  • the arm it is formed with a radial projection 4I having a camming surface 32 engageable with a l2ip 3 on the end of the shank por-tion 23 of arm
  • the chain is placed in the block member I2 with the side links thereof received in the grooves l5 and I5 and the roller 30 at the point at which the chain is to be severed received in the notch 20.
  • the arm 23 is then swung into overlying relation with respect to the chain and is locked in overlying position by rotating arm 40 to engage the camming element 4
  • the element 4l binds securely beneath the lip 43 and frictionally interlocks with the lip 43. This maintains the arm 23 in clamping engagement with the roller 3D.
  • the hand crank 38 is rotated to advance the threaded rod 35 in the tubular member 32, whereby the pin 31 exerts axial thrust against the rivet 39 of the chain and forces said rivet outwardly through the opening dened by the mating semcircular notches 22 and 3 l.
  • a sprocket chain severing tool of the character described comprising a block member formed with :a groove, a longitudinal rib in said groove disposed between the side Walls of the groove and denning a seat adapted to receive a sprocket chain, said rib being formed with a transverse groove adapted to receive a roller of said chain, a transverse tubular guide member carried by the block member at one side thereof and aligned with said transverse groove, a crank rod threaded into said tubular guide member, a pin member carried by the end of the crank rod and extending axially in the bore of said guide member, said -pin member being adapted to abut the end of the rivet contained in said chain roller responsive to rotation of the crank rod, whereby the rivet may be forced out of the chain, a transverse arm pivoted to said block member in the same transverse plane as said transverse groove and arranged to at times overlie said transverse groove, said arm being formed with respective recesses arranged to receive said roller and the side links of the chain

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)

Description

DeC- 23, 1952 G. A. sJosTRoM ET AL 2,622,389
LINK PIVOT REMOVING Toor.
Filed Nov. 24, 195o MNM mi IN V EN TOR5` Gmac-.z A SJosTnoM 3g EY@- Tneooom: ANYBERG Patented Dec. 2 3, ,1952
LINK PIVOT REMGVING TOOL George A. Sjostrom and Theodore A. Nyberg, Auburn, Maine Application November 24, 195o, serial ria-197,369
. 1 Claim.
This invention relates to tools for severing sprocket chains, and more particularly to an improved implement for separating the links of a sprocket chain in an easy and rapid manner.
A main object of the invention is to provide a novel and improved lsprocket chain-severing tool which is very simple in construction, which is easy to use, and which is adapted to rapidly remove the connecting rivet employed between adjacent sets of links of a sprocket chain.
A further object of the inventionis to provide an improved sprocket chain-severing tool which is relatively inexpensive to manufacture, which involves only a few parts, which is very sturdy in construction, and which enables a sprocket chain to be severed rapidly, whereby said sprocket chain may be repaired or varied'in length.
Further objects and advantages of the invention will become apparent from the following description and claim, and from the accompanying drawings, wherein:
Figure 1 is a top plan View of an improved chain-severing too-l 'according to the present invention, showing a Vportion of' a sprocket chain mounted therein;
Figure 2 is a front end elevational View of the tool of Figure 1;
Figure 3 is a vertical cross-sectional view taken Aon the line 3 3 of Figure 2;
Figure 4 is a cross-sectional detail View taken on the line -li of Figure 3;
Figure 5 is a cross-sectional detail view taken on the line 5 5 of Figure 3;
Figure 6 is a fragmentary side elevational view of the chain-gripping portion of the tool of Figure l, said chain-gripping portion being shown in open position;
Figure l is a fragmentary perspective View showing the main portions of the tool of Figures 1 to 6, the clamping arm being shown separated from the 'body of lthe tool.
Referring to the drawings, the chain-severing tool is designated generally at I I. Said tool comprises a block member I2 to the bottom of which is rigidly secured a depending rigid handle loop I3. The block member I2 is formed with a pair of spaced grooves i5 and I5 adapted to receive the side links of a standard sprocket chain, the grooves I5 and I5 defining therebetween a rib IB which is adapted to extend between the opposing side links of the sprocket chain above mentioned. One side of the block member I2 is formed with the upstanding abutment member I1 which is formed with the transverse slot ,I8 defining the spaced, parallel, transverse rib 2 members I3, I9'. The ri'b i5 is formed with a transverse central groove 20. Designated at `2I is an opstanding wall element extending parallel to the rib I5 and located at the forward'end of the block member I2. The top edge of the wall element 2| is formed with a groove 22 of semicircular cross-section which is in alignment with the groove 2i! of the rib I3, as shown in Figure 7.
Designated at 23 is an arm having a shank portion 24 which is received between the transverse walls I9 and I9', and which is pivotally connected to said walls by a transverse pivot pin 25. The arm 23 has a depending rib 26 adapted to engage the rib IG in overlying relation to the groove 2li and the end of the arm 23 is formed with a depending rib 2l adapted to engage the rib ZI in overlying relation to the groove 22. Rib 23 is formed with a semicircular notch or groove 29 adapted to mate withthe semicircular notch 2B to define a seat for receiving the roller 33 of the sprocket chain at the point at which the chain is to be severed, as shown in Figure 3. The rib 2l is formed with a semicircular notch 3| adapted to mate with the notch 22 to dene a circular opening aligned with the seat dened by notches 20 and 29.
Designated at 32 is a tubular guide member which is formed with a reduced portion 33 extending transversely into and threadedly engaged in the block I2 at the abutment Il. The shank portion 33 is formed with an axial bore 34 which is axially aligned with the semicircular notches 2Q and 22. Designated at 35 is a rod member which is threadedly engaged inside an enlarged bore portion 36 provided in the tubular member 32, said rod 35 having rigidly secured thereto an axial pin member 37 which is slidably received in the bore 33. Secured to the ends of the rod 35 is a crank handle 3S which is rotatable to advance the rod 35 in the tubular member 32, whereby the pin 3l may be forced against the fastening rivet associated with the chain roller 33, thereby exerting axial thrust on the rivet. By applying continued torque to the crank handle 38, the rivet, shown at 39, may be forced out of the roller 30 through the opening donned by the mating notches 22 and 3 I.
Designated at BE) is an arm rotatably mounted on the reduced portion 33 of the tubular member 32 between the block I2 and the shoulder defined between the main body portion of mem- 'ber 32 and the reduced portion 33 thereof. The arm it is formed with a radial projection 4I having a camming surface 32 engageable with a l2ip 3 on the end of the shank por-tion 23 of arm In using the tool, the chain is placed in the block member I2 with the side links thereof received in the grooves l5 and I5 and the roller 30 at the point at which the chain is to be severed received in the notch 20. The arm 23 is then swung into overlying relation with respect to the chain and is locked in overlying position by rotating arm 40 to engage the camming element 4| with the lip 43 of the shank 24. It will be apparent that with the arm 40 in the position shown in Figures 3 and 4, the element 4l binds securely beneath the lip 43 and frictionally interlocks with the lip 43. This maintains the arm 23 in clamping engagement with the roller 3D. With the chain thus gripped between arm 23 and the body l2, the hand crank 38 is rotated to advance the threaded rod 35 in the tubular member 32, whereby the pin 31 exerts axial thrust against the rivet 39 of the chain and forces said rivet outwardly through the opening dened by the mating semcircular notches 22 and 3 l.
It Will thus be apparent that a chain may be rapidly and easily severed at any desired point thereon by the use of the tool in the manner 'above described. It will be noted that the side links of the chain are received in the grooves l5 and I5', and are snugly held therein while the crank rod 35 is rotated. There is, therefore, no need for anchoring or clamping the sprocket chain in the block member I2 in any other manner than the one above described, namely, by means of the arm 23 and the locking arm 40, and the operator merely holds the handle loop I3 with one hand while rotating the crank handle 38 with the other hand.
While a specific embodiment of an improved sprocket chain-severing tool has been disclosed in the foregoing description, it will be understood that various modifications Within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as dened by the scope of the appended claim.
What is claimed is:
A sprocket chain severing tool of the character described comprising a block member formed with :a groove, a longitudinal rib in said groove disposed between the side Walls of the groove and denning a seat adapted to receive a sprocket chain, said rib being formed with a transverse groove adapted to receive a roller of said chain, a transverse tubular guide member carried by the block member at one side thereof and aligned with said transverse groove, a crank rod threaded into said tubular guide member, a pin member carried by the end of the crank rod and extending axially in the bore of said guide member, said -pin member being adapted to abut the end of the rivet contained in said chain roller responsive to rotation of the crank rod, whereby the rivet may be forced out of the chain, a transverse arm pivoted to said block member in the same transverse plane as said transverse groove and arranged to at times overlie said transverse groove, said arm being formed with respective recesses arranged to receive said roller and the side links of the chain, a detent arm pivoted to said tubular guide member, and camming means on said detent arm lockingly engaging said transverse arm when the transverse arm is in overlying relation to said transverse groove.
GEORGE A. SJOSTROM.
THEODORE A. NYBERG.
REFERENCES CITED The following references are of record in the nle of this patent:
UNITED STATES PATENTS Number Name Date 1,000,867 Widmayer et al. Aug. 15, 1911 1,436,429 Bean Nov. 21, 1922 1,469,594 Harley Oct. 2, 1923 2,091,780 Horton Apr. 31, 1937 FOREIGN PATENTS Number Country Date 17,825 Great Britain July 28, 1914 133,589 Great Britain Oct. 16, 1919 922,820 France Feb. 10, 1947
US197369A 1950-11-24 1950-11-24 Link pivot removing tool Expired - Lifetime US2622389A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895289A (en) * 1956-12-03 1959-07-21 Twin Martin Corp Chain link removing tool
DE1091408B (en) * 1955-04-23 1960-10-20 Wippermann Jr G M B H Rivet loosener for bicycle, motorcycle and similar gear chains
US3041820A (en) * 1959-08-11 1962-07-03 Clay G Timmerman Device for positioning and preparing joined links for separation
US3058295A (en) * 1960-11-30 1962-10-16 Mine Safety Appliances Co Explosive tool for removing sprocket chain pivot pins
DE1269580B (en) * 1961-09-06 1968-05-30 Morse Chain Co Device for driving out and driving in a hinge pin
US3979812A (en) * 1974-10-07 1976-09-14 Kuenzig Frederick J Chain breaker
US4394810A (en) * 1980-11-17 1983-07-26 Womble Larry E Chain link repair device
US5203158A (en) * 1991-10-29 1993-04-20 Bowers Charles E Roller chain assembling and disassembling device
EP0636459A1 (en) * 1993-07-27 1995-02-01 Hughes-Nexus Limited Chain assembly/disassembly
US6170142B1 (en) 1998-03-18 2001-01-09 Daniel E. Paterson Roller chain link retainer tool
FR2831847A1 (en) * 2001-06-12 2003-05-09 Campagnolo Srl TOOL FOR INSERTING AND EXTRACTING PINS FROM A ROLLER CHAIN
DE102021200806B3 (en) 2021-01-29 2022-06-15 Ra-Co Radsportartikel Und Componenten Vertriebs Gmbh Riveter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB133589A (en) *
US1000867A (en) * 1910-08-18 1911-08-15 Frank B Widmayer Rivet-removing device for chains.
GB191417825A (en) * 1914-07-28 1915-04-15 Renold Hans Ltd Improvements in Appliances for Extracting or Inserting Studs of Driving Chains.
US1436429A (en) * 1920-06-28 1922-11-21 Bean Roscoe Chain tool
US1469594A (en) * 1920-07-09 1923-10-02 Harley Davidson Motor Co Inc Rivet remover
US2091780A (en) * 1936-11-05 1937-08-31 Link Belt Co Chain pin extractor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB133589A (en) *
US1000867A (en) * 1910-08-18 1911-08-15 Frank B Widmayer Rivet-removing device for chains.
GB191417825A (en) * 1914-07-28 1915-04-15 Renold Hans Ltd Improvements in Appliances for Extracting or Inserting Studs of Driving Chains.
US1436429A (en) * 1920-06-28 1922-11-21 Bean Roscoe Chain tool
US1469594A (en) * 1920-07-09 1923-10-02 Harley Davidson Motor Co Inc Rivet remover
US2091780A (en) * 1936-11-05 1937-08-31 Link Belt Co Chain pin extractor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1091408B (en) * 1955-04-23 1960-10-20 Wippermann Jr G M B H Rivet loosener for bicycle, motorcycle and similar gear chains
US2895289A (en) * 1956-12-03 1959-07-21 Twin Martin Corp Chain link removing tool
US3041820A (en) * 1959-08-11 1962-07-03 Clay G Timmerman Device for positioning and preparing joined links for separation
US3058295A (en) * 1960-11-30 1962-10-16 Mine Safety Appliances Co Explosive tool for removing sprocket chain pivot pins
DE1269580B (en) * 1961-09-06 1968-05-30 Morse Chain Co Device for driving out and driving in a hinge pin
US3979812A (en) * 1974-10-07 1976-09-14 Kuenzig Frederick J Chain breaker
US4394810A (en) * 1980-11-17 1983-07-26 Womble Larry E Chain link repair device
US5203158A (en) * 1991-10-29 1993-04-20 Bowers Charles E Roller chain assembling and disassembling device
EP0636459A1 (en) * 1993-07-27 1995-02-01 Hughes-Nexus Limited Chain assembly/disassembly
US6170142B1 (en) 1998-03-18 2001-01-09 Daniel E. Paterson Roller chain link retainer tool
FR2831847A1 (en) * 2001-06-12 2003-05-09 Campagnolo Srl TOOL FOR INSERTING AND EXTRACTING PINS FROM A ROLLER CHAIN
DE102021200806B3 (en) 2021-01-29 2022-06-15 Ra-Co Radsportartikel Und Componenten Vertriebs Gmbh Riveter

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