B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/73
B60T 8/34 (2006.01) B60T 8/42 (2006.01) B60T 11/34 (2006.01)
Patent
CA 2016269
ABSTRACT OF THE DISCLOSURE The pressure differential release valve (130) comprises a three-part body having a first end member (132), an intermediate body member (133), and a second end member (134). The members (132, 133, 134) define an interior stepped bore (1393 containing a differential area piston (141) and a poppet (161). The differential area piston (141) and poppet (161) have respective longi- tudinal through-openings (142, 162) and the poppet (161) engages a valve seat (168) of the body. The longitudinal through-opening (162) of the poppet (161) includes a ball valve (165) biased by a spring (166) into engagement with a valve seat (164) of the poppet (161). The piston (141) abuts the poppet (161) at an end (151) adjacent the valve seat (164) of the poppet (161). Fluid pressure received at an end (135) opening in the first end member (132) is transmitted through the body and exits an end opening (136) at the second end member (134). The fluid pressure displaces the ball valve (165) against the spring (166) so that fluid flows around the ball valve (165) and through the longitudinal through-opening (162) of the poppet (161). A reverse flow of fluid between the end openings (135, 136) causes, at a predetermined pressure differential, the piston (141) and poppet (161) to be displaced within the stepped bore (139) so that fluid flows around the poppet (161) and into the longitudinal through-opening (142) of the piston (141) whereby the ball valve (165) within the poppet (161) is effectively bypassed.
Alliedsignal Inc.
Lindenman Charles E.
Macrae & Co.
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