ROBERT A CLARK
Speech Language Pathology in Bristol, RI
License number
Massachusetts 5456
Issued Date
Aug 18, 2000
Expiration Date
Jan 6, 2018
Type
Speech Language Pathologist
Address
Address
Bristol, RI 02809
Professional information
High Pressure Enabled, Low Pressure Activated Automatic Fluid Control Valve
US Patent:
5694977, Dec 9, 1997
Filed:
Sep 5, 1995
Appl. No.:
8/528631
Inventors:
Robert H. Clark - Bristol RI
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
F16K 1700
US Classification:
137467
Abstract:
A simple and highly reliable automatic valve is disclosed which is enabled y being subjected to a predetermined pressure and actuated as pressure is reduced from that pressure. A pressure differential of several orders of magnitude between enablement pressure and actuation pressure can be obtained by providing non-linear or plural springs which oppose fluid pressure against a reciprocable piston. The piston includes an aperture or passage which seals against a surrounding bore when the valve is closed. The piston is maintained in a position where the aperture or passage is sealed against the bore by a latch. The latch comprises a band spring held in position by a protrusion on the piston and released when the piston is moved by a predetermined fluid pressure. Fine adjustment of both enablement and actuation pressures is provided.