Double a Products Company

Double a Products

Curtis H Day

Ronald L Loup

George L Schick

Arthur W Gill

Rainer Teichert

An override cartridge for a solenoid operated fluid valve provides convenient conversion of a valve to include or exclude a mechanical override feature. The disclosed construction comprises a tubular cartridge body containing the override, with the tubular body having a screw thread connection to the valve. Other features are also disclosed.

Solenoid valve override cartridge

Solenoid operated valve

Solenoid operated directional valves are disclosed which have a modular construction wherein electrical connections between component parts are made integral and concurrent with the act of mounting the component parts together. The modular construction means that no separate lead wires are required to be connected between the component parts. The modular construction: reduces the time required to assemble valves in the factory; facilitates installation and maintenance procedures in the field; permits optional features to be selectively incorporated into or removed from valves in a non-destructive waste-free fashion; and essentially eliminates the possibility of improperly connecting electrical circuits within valves.

Solenoid operated directional valves having modular construction

A solenoid operated directional valve 10 that has cushioning chambers 48 and 50 into which the attenuation elements 52 and 54 on the ends of the spool 38 are received for cushioning the movement of the spool, and a transfer loop 56 through which fluid can travel during the cushioning operation, characterized in that the attenuation elements are constructed and arranged so that they will function to purge air or other gaseous fluids from the cushioning chambers and the transfer loop as an incident to reciprocal movement of the spool.

Directional valve with spool transfer loop

A solenoid operated directional valve with detent means for retaining the spool of the valve in either of two selected positions, the detent means being operatively associated with the solenoid pins for holding one or the other of the pins in a selected position and thereby for retaining the spool in a selected position in the absence of any direct connection between the detent means and the spool, the detent means further being located out of the flow-passageways of the valve so as to preclude interference with fluid flow and being constructed and arranged to provide detent disengagement forces of uniform low limits and with no side loads applied on the spool, and to contain no loose parts and to have a near infinite life.

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Manchester, MI, United States of America

Curtis H Day