公开(公告)号：US3626122A

公开(公告)日：1971-12-07

申请号：US3626122D

申请日：1970-07-02

Applicant: HORTON AUTOMATICS INC

Inventor： HORTON DEE D ,  HORTON DEE D JR

IPC: E05F15/20 ,  H01H35/40 ,  F15B7/00 ,  F16K21/16

CPC classification number: E05F15/75 ,  Y10T137/7869

Abstract: Apparatus for selectively venting a pressure-sensitive fluid system. Fluid pressure of the system is directed through a first conduit into a chamber having an expandable wall portion and through a second conduit which terminates in an opening adjacent and facing the external surface of the expandable wall. Small system pressure fluctuations are vented through the opening of the second conduit and large pressure changes cause the expandable wall portion to extend into sealing contact with the termination of the second conduit, thereby closing the vent opening. System fluid pressure may also be directed through a third conduit into a second expandable wall fluid chamber and the expansion of that wall utilized to actuate an electrical switch.