With Pitman Between Grip Lever And Intermediate Pivot Patents (Class 81/374)
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Patent number: 8919229Abstract: A one handed quick release locking pliers preferably includes a fixed jaw, a movable jaw, a fixed handle, a toggle link, a power link and a movable handle. The fixed jaw is retained in one end of the fixed. The movable jaw is pivotally retained in the one end of the fixed handle. A toggle link release surface extends from the second end of the toggle link. A toggle link stop projection extends outward from the actuation portion. The toggle link stop projection provides an over-center stop for clamping an object. A power link release projection extends outward from the movable handle, substantially perpendicular to the toggle link stop projection. The power link release projection contacts the power link. Moving a second end of the movable handle away from the fixed handle will cause the power link release projection to push the power link and release a clamped object.Type: GrantFiled: July 23, 2014Date of Patent: December 30, 2014Inventors: Robert L. Aldredge, Daniel J Schaefer
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Patent number: 7726217Abstract: The self-adjusting locking pliers include a fixed assembly having a fixed jaw supported at one end. A moveable jaw is pivotably supported on the fixed assembly at a slidable pivot connection. The slidable pivot connection includes a pawl provided with teeth. A rack of teeth includes first and second sets of teeth offset from one another by 1/2 of the pitch that may each be engaged by the teeth formed on pawl. A lever is attached to the fixed assembly and a linkage transmits a force applied to the lever to the jaws and locks the jaws in the clamping position. The linkage allows the angle between the links to be preset to thereby control the clamping force applied to the work piece. The movable jaw is selectively attached to the linkage in one two positions such that the jaw span may be adjusted without affecting the geometry of the linkage.Type: GrantFiled: October 25, 2006Date of Patent: June 1, 2010Assignee: Irwin Industrial Tool CompanyInventors: David P. Engvall, Thomas M. Chervenak
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Patent number: 7509895Abstract: The self-adjusting locking pliers include a body having a fixed jaw supported at one end. A moveable jaw is pivotably supported on the body at a slidable pivot connection. A linkage transmits a force applied to the handles of the pliers to the jaws and locks the jaws in the clamping position. The linkage allows the angle between the links to be preset to thereby control the clamping force applied to the work piece. The movable jaw is selectively attached to the linkage in one of two positions such that the jaw span may be adjusted without affecting the geometry of the linkage.Type: GrantFiled: October 25, 2006Date of Patent: March 31, 2009Assignee: Irwin Industrial Tool CompanyInventors: David P. Engvall, Thomas M. Chervenak
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Patent number: 6776072Abstract: An adjustable pliers wrench including a fixture having a handle and an opposing stationary jaw, a co-acting jaw pivoted to the fixture and a lever pivoted to the co-acting jaw. A guide is attached proximate the handle and a locking element is arranged on the guide for reciprocal and canting movement. At least one attached biasing element urges the locking element toward the stationary jaw. An arm is pivoted to the lever and a cam is pivoted to the arm and to the locking element so as to be movable between a first condition permitting the locking element to reciprocate along the guide and a second condition bearing against the guide and canting the locking element into frictional engagement against the guide.Type: GrantFiled: June 18, 2003Date of Patent: August 17, 2004Inventors: Daniel L. Poole, Robert N. Poole
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Patent number: 6591719Abstract: An adjustable pliers wrench including a fixture having a handle and an opposing stationary jaw, a co-acting jaw pivoted to the fixture and a lever pivoted to the co-acting jaw. A guide is attached proximate the handle and a locking element is arranged on the guide for reciprocal and canting movement. At least one attached biasing element urges the locking element toward the stationary jaw. An arm is pivoted to the lever and a cam is pivoted to the arm and to the locking element so as to be movable between a first condition permitting the locking element to reciprocate along the guide and a second condition bearing against the guide and canting the locking element into frictional engagement against the guide.Type: GrantFiled: July 19, 2001Date of Patent: July 15, 2003Assignee: Newell Rubbermaid, Inc.Inventors: Daniel L. Poole, Robert N. Poole
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Patent number: 5992273Abstract: An improved set of adjustable locking pliers having two pivotally mounted jaws. A lock lever is pivotally mounted to one handle member and slidably retained in the longitudinal grooved portion of the opposite handle, and an adjustment screw threaded longitudinally into the grooved handle member bears upon the sliding end of the lever. Handle members are pivotally connected to retaining plates, said plates having a pin projecting between them with the jaws pivotally mounted and laterally disposed thereon. The gripping surfaces of the jaws interlock above the pin and meet flush in the locked position. The handle member having the adjustment screw has a curved end which spreads the bottom of the jaws apart in the locked position, thereby forcing the gripping surfaces together.Type: GrantFiled: June 5, 1996Date of Patent: November 30, 1999Inventor: Armand Galea
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Patent number: 5280716Abstract: A tool for crimping a terminal to an end of an electrical conductor has a movable fulcrum which reduces hand force required to operate the crimping tool. The tool includes main body having a handle end and a first jaw disposed remote from the handle end. A second jaw is pivotally connected to the main body between the handle end and the first jaw. The a second jaw cooperates with the first jaw to perform the crimping as the second jaw is pivoted toward the first jaw. A movable handle is operably connected to the second jaw to pivot the second jaw toward the first jaw. A driver link has a first end pivotally connected to the main body, and a second end of the driver link has a slidable connection with the movable handle. The slidable connection includes a pivot pin which is slidable in a slot defined in the movable handle.Type: GrantFiled: November 13, 1992Date of Patent: January 25, 1994Assignee: The Whitaker CorporationInventors: Dale R. Ryan, Steven T. Merkt, David B. Weaver, Richard L. Schaeffer
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Patent number: 4116037Abstract: A tubing sizer and straightener having a first lever and a second lever connected to one another by a linkage which causes the levers to move to and from a position in which the levers are substantially parallel and adjacent to one another. Longitudinally extending jaw parts, one of which is mounted on one of the levers and the other of which is mounted on the linkage, thus move against one another along a common plane when the levers are substantially parallel and adjacent to one another for sizing and/or straightening a length of tubing disposed between the jaw parts.Type: GrantFiled: June 28, 1977Date of Patent: September 26, 1978Inventor: Hugh A. Honeycutt