Mcquay-perfex Inc.

Cornelius Engineering Center, Inc.

Richard T Cornelius, Deceased

By Richard Lareau, Executor

Richard G Lareau, Executor

A spray gun for spraying of liquids utilizing compressed air includes a molded casing which contains within a sealed pressurized portion thereof, an electric motor and an air compressor driven by it. A manual trigger sequentially controls an electric switch for the motor and a needle valve for the discharge nozzle such that the motor and compressor are started before liquid is admitted to the nozzle, and are operated after liquid flow to the nozzle has been terminated. A diaphragm-type inlet check valve communicates with a pressure chamber of variable size forming a part of the air compressor, a second diaphragm providing both the movable wall of the pressure chamber as well as the movable element of an outlet check valve built therein which conducts pressurized air into the pressurized portion of the casing, passing across the motor enroute to the nozzle.

Electrically-driven spray gun

A key-operated actuator includes a frame, an elongated bolt having a driving connection to the device to be actuated, a tumbler mechanism which enables bolt rotation only when a key having proper configuration is inserted. A frangible portion on the key axially displaces a non-rotatable sleeve which carries an anvil that breaks off the endmost frangible portion of the key. The driving connection between the bolt and the device to be actuated is at all times maintained, and the bolt is restricted to angular movement of a predetermined magnitude, there also being anti-backup means to ensure full bolt movement in both directions. A control disc is secured to the bolt and provides a portion of the anti-backup means, provides a portion of angular movement limiting means, provides an abutment that prevents bolt rotation when the last frangible portion has been broken off, and provides control for a further actuator that operates a further device.

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Minnetonka, MN, United States of America

Richard T Cornelius, Deceased