Double action fastener installation tool for blind bolt...

Details Double action fastener installation tool for blind bolt... Double action fastener installation tool for blind bolt...

B - Operations, Transporting

21

J

218/2

B21J 15/34 (2006.01) B21J 15/02 (2006.01) B21J 15/22 (2006.01)

Patent

CA 1075209

IMPROVED DOUBLE ACTION FASTENER INSTALLATION TOOL FOR BLIND RIVETS AND THE LIKE ABSTRACT OF THE DISCLOSURE An improved fluid actuated double action pullgun for in- stalling blind rivets, particularly of the lock spindle type, which includes an improved shift valve mechanism. The shift valve employes a ball- seat relief valve associated with pressure responsive plunger mecha- nism 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.

304940

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