Lever And Connecting Link Patents (Class 30/251)
  • Patent number: 5469625
    Abstract: A hand pruner including a first handle and a second handle pivotally connected to said first handle, a first cutting blade secured to said second handle, a second cutting blade pivotally connected to said second handle for movement into engagement with said first cutting blade and a link connecting said second blade to said first handle whereby said second blade is pivoted into engagement with said first blade when said first handle is pivoted into engagement with said second handle, the cutting blades being laterally offset to provide a scissors cut and are convertible to an anvil cutting blade by mounting an anvil plate on the second cutting blade.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: November 28, 1995
    Assignee: Fiskars Inc.
    Inventors: Craig H. Melter, Robert T. Schofield
  • Patent number: 5307565
    Abstract: A hand operated ratchet tool includes first and second pivotally coupled jaws, first and second links pivotally coupled to the first and second jaws, respectively, a third link pivotally coupled in common with the first and second links, and first and second handles pivotally coupled with the first and third links, respectively, and with one another. First and second pawls are mounted on the pivots between the third link and second handle and between the first link and first handle, respectively. Each alternately engage with teeth provided along a semi-circular edge of the second link to rotate the second link in a direction which closes the adjoining working faces of the jaws. The first pawl has two separate sets of teeth configured to respectively engage with the link teeth when the second link is being rotated in either of two opposing directions to open and close the jaws.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: May 3, 1994
    Assignee: Electroline Corp.
    Inventors: Robert S. Erbrick, Joseph E. Erbrick, Jr.
  • Patent number: 5282315
    Abstract: A cable cutter mounted within an elongate tubular housing includes cutter blades at a first end of the housing and operative handles at the second end of the housing to permit access to restricted areas such as in motor vehicles and the like.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: February 1, 1994
    Inventor: Kenneth E. Martin
  • Patent number: 5245755
    Abstract: A force-multiplying device includes a base or stationary structure and three levers all pivotally mounted on the base and each having a force input end and a force output end and being arranged in a folded configuration such that each lever extends from the force input and to the force output end thereof in a direction generally opposite to that of adjacent levers in the series. The pivot point of each lever is closer to its force output end than to its force input end so that the force delivered at the output end is greater than that applied at the input end. The base and the output lever may operate as a pair of opposed jaws, each carrying a removable force application device for different applications such as cutting, crimping, punching, lifting and spreading. The input lever and the base structure may be configured as handles of a hand-operated tool and the levers may be arranged to either open or close the jaws in response to movement of the handles together.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: September 21, 1993
    Assignee: Snap-on Tools Corporation
    Inventor: Bert Krivec
  • Patent number: 5231763
    Abstract: Mechanical force transmission for a hand tool having a pivot lever or the like which is adapted to be brought into engagement intermittently with a tool member to be driven and acting on a rod-like or tubular workpiece and a handle connected to the other tool member, the pivot lever being connected at one end via a joint to a rocker and on pivoting engaging with its end face arranged at the end indirectly or directly on the tool member to be driven.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: August 3, 1993
    Inventor: Friedrich-Gunther Laux
  • Patent number: 5192298
    Abstract: Disposable laparoscopic surgical instruments for insertion through trocar tubes are disclosed. The instruments broadly include: a hollow aluminum tube; an aluminum clevis which is formed separately from the aluminum tube with the distal end of the hollow aluminum tube crimped around the proximal end of the clevis, and with the clevis including a pivot pin; at least one end effector element having a pivot hole through which the pivot pin of the clevis is pivotally engaged, and another through-hole; an aluminum push rod extending at least partially through the hollow aluminum tube and mechanically coupled to the end effector element; and a plastic actuator engaging the proximal end of the push rod and for imparting reciprocal motion to the push rod relative to the aluminum tube, where the reciprocal motion is translated at the clevis into pivotal motion of the end effector element.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: March 9, 1993
    Assignee: Symbiosis Corporation
    Inventors: Kevin W. Smith, Charles R. Slater, Gregory J. Murphy, Thomas O. Bales, John W. Box, Frank A. Scarfone
  • Patent number: 5171256
    Abstract: A disposable laparoscopic single acting scissors is provided, and generally includes a hollow aluminum tube, a clevis coupled to a first end of the aluminum tube and including a pivot rod, a first scissors blade element having a pivot hole for pivotally engaging the pivot rod of the clevis, and having a through-hole in a base section of said first scissors blade element, a second scissors blade element fixedly engaging the clevis, a thin wire rod extending at least partially through the aluminum tube with a first end of the rod having a longitudinally offset terminal portion for engaging the through-hole of the base section of the first scissors blade element, and a plastic actuator engaged to the other end of the rod for imparting reciprocal motion to the rod relative to the aluminum tube which is translated at the clevis into pivotal motion of the first scissors blade element. The first scissors blade element is preferably formed from investment cast bronze.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: December 15, 1992
    Assignee: Symbiosis Corporation
    Inventors: Kevin W. Smith, Charles R. Slater, Thomas O. Bales, Jr.
  • Patent number: 5159757
    Abstract: Hand shears (1), particularly those which can be used as branch, hedge and/or garden shears, comprise two shearing blades (2, 3) which can be tilted toward or away from one another by two hand levers (4 and 5) about a common joint (6). The hand levers (4 and 5) are joined to one another directly independently of the shearing blades (2 and 3) by means of a second joint (8) which is offset parallel to the shearing blades joint (6). The shearing blade (2) is rigidly connected with a hand lever (4), while the other shearing blade (3) has a driving arm (9), which protrudes beyond the shearing blade joint (6) and to which one end of a coupler (10) is hinged at the linking axis (11). By way of its other end, the coupler (10) is attached also through a linking axis (12) to the second hand lever (5). The two hand levers (4 and 5) and the two shearing blades (2 and 3) together form a four-joint system.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: November 3, 1992
    Assignee: Wolf-Gerate G.m.b.H. Vertriebsgesellschaft KG
    Inventors: Helmut Weid, Peter Held
  • Patent number: 5156633
    Abstract: A Maryland dissectors for insertion through a 5 mm trocar tube is disclosed and generally includes a hollow extended aluminum tube, a clevis, a pivot pin, a push rod, Maryland dissector end effector blades, and an actuator for causing reciprocal motion of the push rod. The clevis fixedly engages a first end of the aluminum tube, with the clevis having a hollow bore communicating with the aluminum tube and a pair of parallel, spaced apart, opposed arms extending away from the aluminum tube. The pivot pin extends transversely between the arms of the clevis and engages the clevis arms. The Maryland dissector end effector blades extend away from the aluminum tube and curve away from the longitudinal axis of the aluminum tube. The pivot pin extends through through-holes in the blades which are sized to permit pivotal movement of the blades around the pivot pin and to permit limited angular displacement of the blades relative to the pivot pin.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: October 20, 1992
    Assignee: Symbiosis Corporation
    Inventor: Kevin W. Smith
  • Patent number: 5141519
    Abstract: Connecting elements are disclosed for a laparoscopic surgical instrument. Each connecting element engages a reciprocally movable push rod having a first through-hole and a pivotally rotatable end effector having a second through-hole. The connecting element is preferably a resilient staple-like element having a first terminal portion configured to pivotally engage the first through-hole in the push rod, an oppositely extending second terminal portion configured to pivotally engage the second through-hole in the end effector, and a substantially U-shaped middle portion coupling the first and second terminal portions. Where a double acting surgical instrument is used, two connecting elements are required. For improved stability, the connecting elements of the double acting surgical instrument can be crossed.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: August 25, 1992
    Assignee: Symbiosis Corporation
    Inventors: Kevin W. Smith, Gregory J. Murphy, John W. Box, Frank A. Scarfone, Thomas O. Bales, Jr.
  • Patent number: 5112346
    Abstract: A retrograde cutting hook punch for arthroscopy is so designed that two ends of a fixed and a pivotable jaw member which are remote from the axis of pivot of the pivotable jaw member are laterally positioned at an angle to the longitudinal axis of the forceps, the pivotable jaw member, which is pivotable between limits set by two abutments, having an axially directed part which is guided to pivot in a longitudinal slot in the fixed jaw member, said axially directed part being provided with a downwardly open longitudinal slot to receive a traction and thrust rod for actuating the pivotable jaw member.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: May 12, 1992
    Assignee: Richard Wolf GmbH
    Inventors: Siegfried Hiltebrandt, Andreas Dingler, Ernst Falk, Martin F. Fischmeister
  • Patent number: 5052243
    Abstract: This hand power tool mechanism is useful for caulking guns in particular. It has a stationary handle (101), a drive lever (102) connected to said stationary handle (101) by a joint (103), a movable handle (104) connected to said drive lever (102) by a joint (105) and a linkage closure bar (106) connected to both said movable handle (104) and said stationary handle (101) by joints (107) and (108) respectively. Said stationary handle (101), drive lever (102), movable handle (104), linkage closure bar (106) and said four joints (103, 105, 107, 108) are forming a four bar linkage mechanism which allows an optimum utilization of the hand power.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: October 1, 1991
    Assignee: Laboratorium fur experimentelle Chirurgie
    Inventor: Slobodan Tepic
  • Patent number: 5020222
    Abstract: Shears are provided with a cutting mechanism for obtaining maximum leverage at the point in the cutting stroke corresponding to the maximum resistance. The cutting mechanism comprises cooperating first and second shearing members and a lever arm. The lever arm is pivotally connected to the first shearing member and a sliding connection is effected between the second shearing member and the lever arm.
    Type: Grant
    Filed: February 10, 1987
    Date of Patent: June 4, 1991
    Assignee: Fiskars Oy Ab
    Inventors: Robert G. Gosselin, Edward M. Wallace
  • Patent number: 5014433
    Abstract: The scissors for household and medical use comprise an upper and lower blade defining a distal region and an upper and lower handle defining a proximal region. The lower blade and handle are formed as one piece and the upper blade and handle are formed as two separate pieces. The upper blade is movably linked to the lower blade by means of a mechanism--e.g. a four-bar linkage--allowing to move said upper blade by acting on said upper handle leaving said one-piece lower blade and handle stationary.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: May 14, 1991
    Assignee: Laboratorium fur experimentelle Chirurgie
    Inventor: Slobodan Tepic
  • Patent number: 4965992
    Abstract: A device for removing unwanted vegetation consisting of a pole with a pair of cutting members on one end and two control handles on the other end. In use, the end with the cutting members is pulled through the vegetation and as the device moves, the offending vegetation is cut off by the cutting action produced by the pulling movement. If, during the cutting, the unwanted vegetation is found to be supple and yielding, a first handle is depressed. This brings the cutting members closer together and causes the supple vegetation to be sheared off. On the other hand, if, during the cutting, the unwanted vegetation pulls out of the ground and becomes lodged in the device, a second handle is depressed. This permits the cutting members to rotate away from each other thereby releasing the unwanted vegetation from the device.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: October 30, 1990
    Inventor: Harold J. Jacobs
  • Patent number: 4950273
    Abstract: A cable action instrument for surgery and other uses comprises a control end, a reaction end, and an angle adjustment section connecting the control end and the reaction end. A flexible control cable extends between the control end and the reaction end and allows a force to be transmitted from the control end to the reaction end so that a desired function may be performed at an instrument tip. The instrument may be bent into an unlimited number of configurations and is easily disassembled and reassembled.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: August 21, 1990
    Inventor: Jeffrey M. Briggs
  • Patent number: 4944093
    Abstract: A forceps and in particular hooked shears, has a distal extremity of the forceps shaft provided with a recess of the one fixed branch of the forceps jaws, with which branch there co-operates a double-armed pivotally displaceable jaw branch by means of a scissors grip and a push and pull rod. The recess of the fixed jaw branch is continued by a shaft slot whereof the delimiting edge forms a stop for a stepped surface of the push and pull rod placed in impingement in the closed position of the jaws and the open position of the jaws is restricted by impingement of a surface of the pivotable jaw branch against the top distal edge of the push rod.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: July 31, 1990
    Assignee: Richard Wolf GmbH
    Inventor: Ernst Falk
  • Patent number: 4899445
    Abstract: A hand-held ratchet tool for moving a pair of jaw members toward and away from each other. The tool comprises a first and second elongated handle, each having a first end and a second end. The second end of the first handle is pivotally connected to the second end of the second handle. The tool further comprises a first jaw member pivotally mounted on the second end of the first handle and an elongate linkage having a first end pivotally mounted on the second end of the second handle and having a second end. The second end of the linkage, the first jaw member and a second jaw member are all pivotally connected along a common pivot axis. The second jaw member includes a plurality of ratchet teeth for receiving a pawl. A pawl is pivotally mounted on the second end of the second handle along the same axis as the pivotal connection between the elongate linkage and the second handle.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: February 13, 1990
    Assignee: Electroline Corp.
    Inventors: Robert S. Erbrick, Manfred E. Strohecker, Joseph E. Erbrick, Jr.
  • Patent number: 4891883
    Abstract: The invention relates to a pair of surgical pliers for the cutting through of wires (14), screws or the like comprising a cutter gripping lever (1) having a cutting edge (15) at its front end and a handle (13) at its rear end, and a cutting lever (2) pivotally connected to the cutter gripping lever by means of a cutting lever hinge (3) with the cutting lever having a second cutting edge (15') disposed opposite to the first cutting edge (15). A gripping lever (4) is also pivotally connected to the cutter gripping lever (1). A transmission is arranged between the gripping lever (4) and the cutting lever (2). The input drive member (6) of the transmission braced against the cutter gripping lever (1) is loaded by the gripping lever whereas the output drive member (11) of the transmission acts on the cutting lever (2) at the side remote from the cutting edge (15) of the cutting lever hinge (3) which connects the cutting lever (2) to the cutter gripping lever (1).
    Type: Grant
    Filed: December 20, 1988
    Date of Patent: January 9, 1990
    Assignee: Delma elektro- und medizinische Apparatebau GmbH
    Inventor: Erwin Mantele
  • Patent number: 4763669
    Abstract: A surgical instrument for obtaining biopsies, performing microsurgery and bipolar microelectrocautery. The instrument head includes opposing jaw members which open and close during the operating procedures. The angle of the instrument head relative to the instrument frame is adjustable to effectively operate on varying surfaces. The angle can be continuously adjusted while the instrument is in an operating position.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: August 16, 1988
    Inventor: John C. Jaeger
  • Patent number: 4739556
    Abstract: The swivel joint of the shears comprises a dish-like rotary head 14 which is moulded from plastic and which is inserted with an inner bush 46 into a swivel joint bush 44 of an extension provided with the fixed upper grip 10. The axial fixing is via a detent means 54, 56.On the rotary head 40 the lower blade 50 is fixedly disposed and the upper blade 68 is pivotal on a bearing bush 58 of the rotary head. A pull rod 78 led through the bush 46 is anchored with a bent end to the movable upper blade laterally of the pivot axis thereof. The other end is anchored in an adjustment bush 82 which is adjustably fixed in an adjustment pin 84. The locking is by a plastic slide 24 which is disposed at the front end of the upper grip and can easily be displaced with the thumb to lock or unlock the lower grip or movable blade.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: April 26, 1988
    Assignee: Wolf-Gerate GmbH
    Inventor: Gebhard Orthey
  • Patent number: 4722257
    Abstract: The invention relates to an apparatus for cutting threaded rods.This apparatus essentially comprises a frame (1) to which a square (2) is fixed by a bolt (6), the said square having a semicylindrical threaded nest (2a) at the top, and to which a moving part (3) is jointed, the said moving part being provided at the bottom with another semicylindrical threaded nest (3a) arranged opposite the one (2a) located in the fixed part (2). The moving part (3) is actuated by a force-multiplying lever (4).The threaded nests (2a and 3a) come to bear against the threaded rod (5) at the moment when cutting takes place, so as to preserve the integrity of the thread of the threaded rod (5).Application: building industry.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: February 2, 1988
    Assignee: Applications Industrielles de Champagne S.A.
    Inventors: Jean-Pierre Deon, Michel Gerard
  • Patent number: 4677748
    Abstract: A hand-operated cable cutter includes a stationary cutter blade having a first curved jaw and a first cutting edge, a movable cutter blade having a second curved jaw and a second cutting edge, gear teeth provided on the movable cutter blade, a drive mechanism, a stationary handle having a distal end secured to the stationary cutter blade, and a swing handle having a distal end mounted pivotally relative to the stationary cutter blade and stationary handle. The movable cutter blade is pivotally connected to the stationary cutter blade. The drive mechanism comprises a pinion kept in engagement with the gear teeth, a ratchet wheel mounted concentrically with and for rotation with the pinion, a knob connected to the pinion, a driving pawl pivotally connected to the swing handle and kept engageable with the ratchet wheel to rotate the ratchet wheel in one direction, and a detent pawl kept in engagement with the ratchet wheel to prevent the ratchet wheel from being rotated in the opposite direction.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: July 7, 1987
    Assignee: Kobayashi Tools Mfg. Co., Ltd.
    Inventor: Mituharu Kobayashi
  • Patent number: 4674184
    Abstract: A cutting tool for plastic tubes or the like including a pair of pivotally connected handle members. One member is defined by a pair of sidewalls interconnected by spaced web portions, an integrally formed jaw for supporting a tube to be cut, pivot structure for pivotally supporting a cutting blade and a slot through which the cutting blade extends. The second handle member carries a ratchet plate having a aperture defining a plurality of ratchet teeth. The ratchet plate is secured to the second handle member by the co-engagement between a pivot pin and an aperture formed in the ratchet plate and a mounting edge that abutably engages an abutment wall formed by the second handle member. The cutting blade is mounted to the first member by a pivot assembly which is easily removed to release the blade.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: June 23, 1987
    Assignee: Milbar Corporation
    Inventor: J. Edward C. Anderson
  • Patent number: 4644651
    Abstract: An instrument for cutting, gripping or clamping includes a base arm with a fixed jaw at one end thereof, and a movable jaw pivotally attached to the arm adjacent the fixed jaw. Also included is a shank, one end of which is pivotally connected to the movable jaw, with the shank extending generally parallel to the arm over its full length. An elongated handle which overlies the shank includes a laterally extending section which is pivotally connected to the other end of the arm and to the other end of the shank. When the handle is pivoted toward the shank, the movable jaw is caused to pivot toward the fixed jaw, and when the handle is pivoted away from the shank, the movable jaw is caused to pivot away from the fixed jaw.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: February 24, 1987
    Assignee: Jacobsen Research Corp.
    Inventor: Stephen C. Jacobsen
  • Patent number: 4569131
    Abstract: A tool having an insert portion mounted on a handle portion which handle portion will actuate a pincher-like tool arrangement on the free end of the insert portion characterized by a locking arrangement for holding the pincher-like tool in a closed position by holding the handle portion in the closed position and a stop arrangement to limit the amount of movement of the pincher-like tool toward the closed position.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: February 11, 1986
    Assignee: Richard Wolf GmbH
    Inventors: Ernst Falk, Siegfried Hiltebrandt, Johann Knoesel
  • Patent number: 4569132
    Abstract: A compound-action scroll snip which is quickly and simply adjusted using a procedure amenable to automation. The snip includes a pair of pivotal blades in direct contact at the pivot point, and a pivot shaft with a head and a threaded end extending through round untapped holes in both blades. Two flat washers are located over the threaded end between one of the blades and a slotted-section locknut is threaded onto the threaded end. Proper adjustment of blade clearance is obtained by tightening the slotted-section locknut until a sudden increase in tightening torque occurs.
    Type: Grant
    Filed: November 23, 1983
    Date of Patent: February 11, 1986
    Assignee: Cooper Industries, Inc.
    Inventor: Roy A. Hill
  • Patent number: 4525929
    Abstract: An improved cutting device including: first and second handles and a movable jaw having forward and rearward portions; a stationary jaw fixed to the first handle, the second handle including first pivot means for connecting the second handle to the stationary jaw and second pivot means for connecting the second handle to the movable jaw for providing slicing action between the jaws; and means, spaced from the first and second pivot means, for constraining motion of the rearward portion of the movable jaw and amplifying the leverage applied to the jaws by the handles through the first and second pivot means.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: July 2, 1985
    Inventors: H. Joseph Brophy, Sr., H. Joseph Brophy, Jr.
  • Patent number: 4502222
    Abstract: The shears have two levers pivoted together, each having a cutting edge at the forward end thereof and an operating handle at the rear end thereof. The lower lever has a hinge hub forming a bearing surface which is laterally offset with respect to its cutting edge and which projects forwardly and upwardly toward its cutting edge.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: March 5, 1985
    Assignee: Michael P. Breston
    Inventor: Claud B. Sargent
  • Patent number: 4420883
    Abstract: The invention discloses pruning apparatus of the compound action hook and blade type. At the upper end of a longitudinally-extending handle, a stationary hook is fixed and extends upwardly therefrom in a plane parallel to and offset from the longitudinally-extending plane of the handle. It defines a downwardly-facing arcuately-shaped limb-engaging-surface for engagement with a limb. There is a movable blade which has a cutting edge and is operable to be reciprocated in an intersecting manner through cutting and return strokes with relation to the engaged limb and to the limb engaging surface of the fixed hook. A lever is pivotally mounted relative to the hook and a link pivotally interconnects to each of the lever and movable blade. The hook and movable blade and lever and link are each disposed contiguous to a common vertical plane.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: December 20, 1983
    Assignee: Wallace Mfg. Corp.
    Inventors: Edward M. Wallace, Robert G. Gosselin, Ernest D. Labarre
  • Patent number: 4368577
    Abstract: Hand-held and hand-operated cutting tool particularly well suited for cleanly and quickly cutting plastic pipe or tubing, rubber hose, or the like. The tool has a blade rotatable in increments or steps from a retracted position in which it is enclosed within a housing to a cutoff position in which it cooperates with a stationary anvil so as to sever the article to be cut. A ratchet drive interconnects a movable handle and the blade so as to incrementally drive the blade toward its cutoff position upon manipulation of the handle. A pawl prevents opening of the blade caused by the springiness of the article being cut upon being engaged by the blade. Upon severing of the article, the blade may be readily returned to its retracted position by, for example, releasing a thumb operated locking pawl.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: January 18, 1983
    Assignee: Emerson Electric Co.
    Inventor: Larry F. Babb
  • Patent number: 4254549
    Abstract: A manually operable tool for use by electric utility linemen for cutting electric conductors. The tool comprises an elongated pole having a cutter mechanism mounted on one end thereof. A manually operable ratchet mechanism is mounted on the pole close to the other end thereof and is connected to the cutter mechanism by linkage so that the cutting action is effected by operation of the ratchet mechanism.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: March 10, 1981
    Assignee: Hastings Fiber Glass Products, Inc.
    Inventor: Earl W. McMullin
  • Patent number: 4186484
    Abstract: A cutting hand tool comprising a receiving jaw for supporting a workpiece in a stable position, a cutting jaw opposed to the receiving jaw and a movable handle for intermittently forcing the cutting jaw into the workpiece through ratchet means. When cutting the workpiece, the cutting jaw in its fully opened position is quickly turned into contact with the workpiece by the movement of the movable handle elastically delivered to the cutting jaw, without resorting to the action of the ratchet means.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: February 5, 1980
    Assignee: Hanazono Kogu Kabushiki Kaisha
    Inventor: Minoru Tanaka
  • Patent number: 4178682
    Abstract: A ratchet cable cutter is provided with a double linkage between the handle and the pawl of the ratchet mechanism, and the relation between the two linkages is such that improved mechanical advantage is obtained while keeping the linkage mechanism within the limited spatial confines of the cutter tool.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: December 18, 1979
    Assignee: H. K. Porter, Inc.
    Inventor: Joseph J. Sadauskas
  • Patent number: 4176450
    Abstract: A cutter comprising a main body including a holder handle and a holder portion, an operating handle pivoted to the holder portion and opposed to the holder handle, a cutting blade turnably mounted on the holder portion, and a ratchet mechanism for converting the opening and closing movement of the handles to the turn of the cutting blade. The holder portion adapted to support a workpiece is disposed across the path of turning movement of the cutting blade in opposed relation to its cutting edge.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: December 4, 1979
    Assignee: Muromoto Iron Works Co., Ltd.
    Inventor: Wasaburo Muromoto, deceased
  • Patent number: 4094064
    Abstract: A shearing tool for synthetic resin tubes in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted at the leading end to the rear and lower end of said lower jaw, an upper jaw or shearing blade having a cutting edge is pivoted in an intermediate position to said upper handle portion above the pivot connection of said lower jaw to said lower handle portion, said lower jaw is provided with an arcuate tube receiving recess in the upper surface thereof, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw for receiving said upper jaw, a connection link is connected between the rear end portion of said blade interposed between said upper and lower handle portions and the lower handle portion in a position rearwardly of said pivot connection of the lower jaw to said lower handle portion for urging said cutting edge toward said tube receiving recess when said upper and lower handle por
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: June 13, 1978
    Assignee: Matsuzaka Iron Works, Inc.
    Inventors: Hideichi Nishikawa, Masaharu Sakamoto
  • Patent number: 4084317
    Abstract: A shearing tool for synthetic resin tubes, in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted to said lower jaw at its leading end, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw, an arcuate tube receiving recess is provided in the upper surface of said lower jaw, said shearing blade is pivoted in an intermediate position of the length to said upper handle portion within said opening, said shearing blade is provided at the rear and lower end with an egaging pawl, a rocking bar having notches in the upper surface is pivoted at one end to the leading end of a lower handle portion, a slot is provided in the rear portion of said shearing blade, a connection link has at one end a pin freely received within said slot and is pivoted at the other end to an intermediate position of the length of said rocking bar, a spring is provided for urging said rocking bar against said e
    Type: Grant
    Filed: May 3, 1977
    Date of Patent: April 18, 1978
    Assignee: Matsuzaka Iron Works, Inc.
    Inventors: Masahiko Nakamura, Hidehiko Itou
  • Patent number: 4058894
    Abstract: The shears comprises a frame, a first jaw integral with the frame, a second jaw pivotable relative to the first jaw, a lever for operating the shears, a first pivot pin pivotally connecting the lever to the frame, a first structure, a second pivot pin pivotally connecting the first structure to the frame, a second structure, a third pivot pin pivotally connecting the second structure to the lever. The first, second and third pivot pins are parallel. The first structure comprises a member mounted to be slidable on the second structure in a direction in alignment with the third pivot pin. A first elastically yieldable device having a rotary action and capable of exerting a substantially constant force is mounted between the frame and the first structure. A second elastically yieldable device having a rectilinear action and capable of exerting a cumulative force is mounted on the second structure between a fixed part of the second structure and the slidable member of the first structure.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: November 22, 1977
    Assignee: Laminoirs Trefileries Cableries de Lens (Anciens Etablissements Gaillard-Stievenart)
    Inventor: Georges Joseph Leturgez
  • Patent number: RE30613
    Abstract: A shearing tool for synthetic resin tubes, in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted to said lower jaw at its leading end, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw, an arcuate tube receiving recess is provided in the upper surface of said lower jaw, said shearing blade is pivoted in an intermediate position of the length to said upper handle portion within said opening, said shearing blade is provided at the rear and lower end with an engaging pawl, a rocking bar having notches in the upper surface is pivoted at one end to the leading end of a lower handle portion, a slot is provided in the rear portion of said shearing blade, a connection link has at one end a pin freely received within said slot and is pivoted at the other end to an intermediate position of the length of said rocking bar, a spring is provided for urging said rocking bar against said
    Type: Grant
    Filed: April 6, 1979
    Date of Patent: May 19, 1981
    Assignee: Matsuzaka Iron Works, Inc.
    Inventors: Masahiko Nakamura, Hidehiko Itou