Double action fastener installation tool for blind rivets and th

Details Double action fastener installation tool for blind rivets and th Double action fastener installation tool for blind rivets and th

1977-07-27

1978-10-10

Lanham, C.W.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

7245317, B21J 1534

Patent

active

041189698

ABSTRACT:
An improved fluid actuated double action pullgun for installing blind rivets, particularly of the lock spindle type, which includes an improved shift valve mechanism. The shift valve employes a ballseat relief valve associated with pressure responsive plunger mechanism and spring responsive ball guide mechanism which respond to pressure differentials to directly monitor pressure in the trapped oil circuit and restrain "shift piston" motion prior to shift. Premature "shift piston" travel, which is a malfunction, is eliminated.

REFERENCES:
patent: 2820566 (1958-01-01), Van Hecke
patent: 3777540 (1973-12-01), Siebol
patent: 3996784 (1976-12-01), Champoux

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