Patent ID: 7401538
Filing Date: 2008-07-22
Classification: B25G,Y10T

Abstract:
1. An F figure wrench comprising: a holding rod having a primary end and a secondary end, and a longitudinal axis extending from the primary end to the secondary end, the primary end of the holding rod having a guide hole extending along the longitudinal axis, said primary end having two lugs extending outwardly from the both sides of the guide hole, each said lug having a lug hole for receiving a pivot, said primary end of the holding rod having a penetration intersecting with the guide hole, wherein the penetration has a ring groove close to outside of the penetration, the radius of the ring groove being bigger than the radius of the penetration, and an outer section of a lock ring is embedded in the ring groove; a moving part having a primary end, a secondary end and a puncture, the primary end of the moving part being installed inside the guide hole, the puncture being concentric with the penetration on the holding rod, the secondary end having a plurality of clutch parts, the plurality of clutch parts being in the form of gear teeth, the primary end of the moving part connects a primary side of a resilient object, a secondary side of said resilient object contacts with the bottom of the guide hole; a cylindrical turning rod having a primary end and a secondary end, said secondary end being installed inside the penetration, the primary end being presented outside with a knob, the turning rod having two positions on the periphery and each position having one eccentric cam, and the two eccentric cams being located on an outer circumferential surface of the turning rod, wherein each said eccentric cams is an insert block being offset from one another and having no connection to a spring, wherein another ring groove is implemented on the periphery of the turning rod to accommodate the inside of the lock ring, whereby said turning rod will be securely retained in the penetration, wherein in a locking position said outer circumferential surface of the turning rod is in abutting contact with an inner surface of said puncture, and each of said two eccentric cams located on said periphery of said turning rod are also in abutting contact with said inner surface of said puncture, and wherein in a unlocking position said outer circumferential surface of said turning rod is in abutting contact with an inner surface of said puncture, and each said two eccentric cams located on said periphery of said turning rod are also in abutting contact with said inner surface of said puncture; a driving part having a primary end, a secondary end and a second pivot hole being concentric with the lug holes of the lugs, whereby the pivot being installed in the pivot hole and pivotally connected with the holding rod, said primary end having a plurality of match parts to match with the clutch parts of the moving part, the plurality of match parts being in a form of gear teeth around the axis of the pivot hole, the gear teeth of the driving part being matched with the gear teeth of the match parts; wherein the inner wall of the puncture in the moving part has two push fronts each respectively being at the locations close to the primary end and the secondary end of the moving part to take the push force from the eccentric cams of the turning rod, and each push front having a concavity implemented therein for the purpose of locking the eccentric cam in position.