Wrench with rack and segment gear linkage
Patent 4797965 Issued on January 17, 1989. Estimated Expiration Date: 
April 21, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 21, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2156529 2481866 2605663 2650511 2827814 3290970 3608405 Plier wrench Toggle wrench Patent #: 4274312 InventorApplicationNo. 07/184270 filed on 04/21/1988US Classes:81/126, Sliding jaw, handle-lever grip81/356, With adjustment means81/362, Grip lever and link81/384With adjustment meansExaminersPrimary: Smith, James G.Attorney, Agent or FirmInternational ClassesB25B 13/00 (20060101)B25B 13/16 (20060101) B25B 13/14 (20060101) B25B 13/30 (20060101) B25B 13/22 (20060101) B25B 7/00 (20060101) B25B 7/12 (20060101) AbstractA wrench of the type having two handle members pivotally connected to one another at a pivot point. Each handle member terminates in a jaw member. Advancing a screw member causes one of the handle members to rotate about the pivot point so that the jaw members are brought together. A pair of slots translate the rotating motion of the handle member about the pivot point into linear components. The jaw members at the end of each handle are biased apart from one another by a spring, but the bias may be overcome by squeezing the handle or by advancing the screw member. When the screw member is fully retracted, the spring separates the jaw members. When the spring member is advanced, it prevents separation of the jaw members. | |
