High and low pressure sensor

Patent · Tue Apr 23 04:00:00 EST 1985

OSTI ID:5269965

Roger, H

A three position, high and low, block and bleed fluid pressure sensor, wherein a piston contained within a cylinder is urged in one direction by a fluctuating sensed fluid pressure and opposed by a single spring located within said cylinder housing. The cylinder housing includes inlet and outlet ports, and at least one venting port. When the equilibrium of the forces between the spring and the fluid port pressure places the piston in a first position, the inlet and outlet port are allowed to communicate by way of an internal passageway formed within the piston and the sensed fluid may pass therethrough. When the pressure exerted by the fluctuating port pressure is greater or lower than the desired range, the piston will assume a second or third position wherein the inlet and outlet ports are misaligned whereby the inlet port is blocked and the outlet port merely discharges residual fluid through one of the venting ports. The range of the first position may be adjusted by rotating an upper portion of the piston with respect to a lower portion of the piston. This rotation may be accomplished exteriorally of the pressure sensor by inserting a tool into the cylinder housing to lengthen or shorten the access of the outlet port to the internal passageway communicating with the inlet port. The spring may be adjusted by means of the threaded end cap of the cylinder housing. A lock nut may be provided for mounting the sensor in a rigid panel.

• Assignee: EDB-85-157989
• Patent Number(s): US 4512370
• OSTI ID: 5269965
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
CONTROL EQUIPMENT
CYLINDERS
DESIGN
DUCTS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
JOINTS
MEASURING INSTRUMENTS
MOTION
PISTONS
POSITIONING
PRESSURE GAGES
ROTATION
THREADED JOINTS