Senco Products, Inc.

Sencorp, Inc.

Eric H Halbert

Carl Siegmann

William T Jobe

Jay M Steeves

Frank J Eiben

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.

Restrictive trigger actuated valve arrangement for a fastener driving

A pneumatically actuated tool for setting blind rivets of the type having a body, a head and breakaway pull mandrel. The tool comprises a body having a double-acting cylinder therein, a handle attached to the body, a guide body affixed to the body beneath the cylinder, a pull track in the guide body for the rivets and a bore in the body connecting the cylinder and the pull track, the cylinder, the bore, and the pull track being coaxial. The tool is provided with a rivet pickup and pull mechanism comprising a lower load piston having a downwardly depending tubular assembly slidable within the body bore and pull track and terminating in a nose piece, and an upper pull piston having a downwardly depending tubular assembly telescopicly and shiftably located within the lower load piston tubular assembly and terminating in a chuck provided with mandrel-engaging jaws. The tool has a magazine connected to the guide body and containing a strip of rivets. An automatic rivet feed mechanism is provided comprising a shiftable feeder shoe and pawl for advancing the forwardmost rivet of the strip into the guide body pull track, a ratchet for preventing the strip from shifting away from the guide body pull track, and means to hold and center the forwardmost rivet in the guide body pull track. The tool is further provided with pneumatic sequencing controls which provide full cycle-through control, such that the tool, once triggered, will perform the full cycle, and the next cycle cannot be started until the trigger is released at the end of the previous cycle.

Pneumatic rivet setting tool

A portable self-piercing riveting system includes a pneumatically driven driver which forces a self-piercing rivet through a workpiece. An anvil carried on a pivotal clamp is moved into operative alignment with the driver on the blind side of the workpiece to receive and set a rivet. The clamp is part of a linkage mechanism which moves the anvil into and out of operative position. When the anvil is in an operative position to receive and set a rivet, the linkage mechanism is in a locked position whereby the impactive force received by the anvil is not transmitted to an actuator for the linkage mechanism.

Portable self-piercing riveting apparatus

In a fluid operated tool of the type having firing control means comprising two separate and independent triggering means shiftable independently and in any order between normal and firing positions and requiring both triggering means to be concurrently in their firing positions to actuate the tool, safety means introducing into the firing sequence of the firing control means a time limit within which both triggering means must achieve their firing positions. If both triggering means do not achieve their firing positions within the time limit, the firing sequence must be reinitiated with a selected one or both of the triggering means initially in their normal positions.

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Cincinnati, OH, United States of America

Eric H Halbert