F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
166/56
F04B 47/12 (2006.01) F04B 53/10 (2006.01)
Patent
CA 1289062
27645-3 ABSTRACT OF THE INVENTION Apparatus and method of utilizing differential pressure to seat an almost-closed valve ball. Included are apparatus and means to protect valve ball from excessive closing force. Also included is a multiple valve arrangement to relieve excessive differential pressure.
530417
Fetherstonhaugh & Co.
Gramling William D.
LandOfFree
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