The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 1999
Filed:
Dec. 05, 1997
Brian M White, Riverside, RI (US);
Stanley Fastening Systems, L.P., East Greenwich, RI (US);
Abstract
An improved pneumatically operated fastener driving device comprising an actuating assembly mounted with respect to a housing assembly and movable from an inoperative position to an operative position. A first sealing element is mounted with respect to a feed path. The first sealing element moves from a sealed position, wherein it prevents communication between an air pressure reservoir and a control pressure chamber when the actuating assembly is in the operative position, and an unsealed position, wherein the first sealing element permits such communication to move a main valve to a closed position when the actuating assembly is in the inoperative position. A second sealing element is mounted with respect to an exhaust port and moves from a sealed position, wherein it prevents communication between the control pressure chamber and the atmosphere when the actuating assembly is in the inoperative position, and an unsealed position, wherein the second sealing element permits such communication, thereby affecting movement of the main valve to an open position, when the actuating assembly is in the operative position. A biasing element is operatively associated with the second sealing element and biases the second sealing element towards its unsealed position to maintain communication of the control pressure chamber with the atmosphere until the first sealing element has moved to its unsealed position.