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:
Aug. 18, 2020
Filed:
Jun. 19, 2015
Hitachi Koki Co., Ltd., Tokyo, JP;
Yoshinori Ishizawa, Ibaraki, JP;
KOKI HOLDINGS CO., LTD., Tokyo, JP;
Abstract
A fastener driving tool is provided which performs driving only when a trigger lever is turned ON following a push lever. The fastener driving tool includes a sleeve valve driving a driver blade, and in the sleeve valve, supply and exhaust of compressed air are controlled by a trigger valve. The trigger valve includes a valve piston movable between an air-supply position where the valve piston causes an opening part and a communication port to communicate with each other and blocks an exhaust port, and an exhaust position where the valve piston blocks the opening part and causes the exhaust port and the communication port to communicate with each other, and a plunger movable between a communication position where the plunger causes compressed air in a pressure accumulation chamber to be supplied to a pressure chamber and a shutoff position where the plunger shuts off communication between the pressure accumulation chamber and the pressure chamber and causes air in the pressure chamber to be exhausted. When a trigger and a push lever are in striking stop positions, the plunger is driven to a communication position by a trigger arm.