Restrictive trigger actuated valve arrangement for a fastener driving tool
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B25C-001/04
출원번호
US-0113597
(1987-10-26)
발명자
/ 주소
Steeves Jay M. (Cincinnati OH) Halbert Eric H. (Cincinnati OH)
출원인 / 주소
Sencorp (Cincinnati OH 02)
인용정보
피인용 횟수 :
16인용 특허 :
4
초록▼
A valve arrangement for a fastener driving tool of the type having a cylinder and piston/driver assembly for driving a fastener, a main valve which, when actuated, opens the cylinder to air under pressure causing the piston/driver assembly to drive a fastener, a remote valve which, when actuated, ca
A valve arrangement for a fastener driving tool of the type having a cylinder and piston/driver assembly for driving a fastener, a main valve which, when actuated, opens the cylinder to air under pressure causing the piston/driver assembly to drive a fastener, a remote valve which, when actuated, causes the main valve to open, and a trigger actuated valve together with a workpiece responsive safety actuated valve which, when both are actuated, actuate the remote valve, the valve arrangement being such that the safety actuated valve must be actuated before the trigger actuated valve in order for the remote valve to the actuated. The trigger actuated valve has a trigger-operated stem slidably mounted within a valve body. The body defines a chamber in which one end of the remote valve stem is slidingly and sealingly engaged. Air under pressure within the chamber maintains the remote valve stem in an unactuated position. A passage in the tool body connects the trigger actuated valve to the safety actuated valve. The chamber is connected to said passage when the trigger actuated valve is open. The passage is connected to atmosphere when the safety actuated valve is open. One of the trigger actuated valve and the safety actuated valve is an on-off valve and the other is a pressure controlled valve. The pressure controlled valve precludes connection of the chamber to atmosphere via passage to shift the remote valve stem to its actuated position unless the safety actuated valve is opened prior to the opening of the trigger actuated valve.
대표청구항▼
In a fastener driving tool of the type having a body connected to a source of air under pressure, a manual trigger, a workpiece responsive safety, a cylinder and piston/driver assembly for driving a fastener, a main valve which when actuated opens said cylinder to said air under pressure causing sai
In a fastener driving tool of the type having a body connected to a source of air under pressure, a manual trigger, a workpiece responsive safety, a cylinder and piston/driver assembly for driving a fastener, a main valve which when actuated opens said cylinder to said air under pressure causing said piston/driver assembly to drive a fastener, a remote valve which when actuated causes said main valve to open, and a trigger actuated valve together with a safety actuated valve which when both are opened actuate said remote valve, said trigger actuated valve comprising a valve body and a stem therein shiftable by said trigger between open and closed positions, said valve body of said trigger actuated valve defining a chamber, said remote valve comprising a body and a stem mounted therein and shiftable therein between actuated and unactuated positions, one end of said remote valve stem being slidably and sealingly engaged in said chamber of said trigger valve, a compression spring within said chamber beneath said remote valve stem end, a bleed passage in said end of said remote valve stem permitting air under pressure within said tool body to enter said chamber and in conjunction with said compression spring to maintain said remote valve stem in its unactuated position, said safety actuated valve comprising a valve body and a stem therein shiftable by said safety between open and closed positions, a passage in said tool body connecting said trigger actuated valve to said safety actuated valve, said chamber being connected to said passage when said trigger actuated valve stem is in its open position, said passage being connected to atmosphere when said safety actuated valve stem is in its open position, the improvement comprising one of said trigger actuated valve and said safety actuated valve being an on-off valve and the other of said trigger actuated valve and said safety actuated valve being a pressure controlled valve, means in said pressure controlled valve precluding connection of said chamber to atmosphere via said passage to shift said remote valve stem to its actuated position unless said valve stem of said safety actuated valve is shifted to its open position by said safety prior to the shifting of said valve stem of said actuated trigger valve to its open position by said manual trigger.
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이 특허에 인용된 특허 (4)
Howard Frank C. (Mt. Prospect IL) Kiefer Allan E. (Fox River Grove IL), Actuating means for fastener driving tool.
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