Charles Ernest Lindsey

US Patent:

41671350, Sep 11, 1979

Filed:

Nov 18, 1977

Appl. No.:

5/852723

Inventors:

Charles T. Lindsey - Irvine CA

Assignee:

Bertea Corporation - Irvine CA

International Classification:

F01B 102

US Classification:

92 61

Abstract:

A fluid control unit comprising a drive piston having first and second faces and a drive rod. The drive piston has first and second fluid responsive faces exposable to fluid under pressure. The fluid under pressure acting on the first face urges the drive piston in a first direction and the fluid under pressure acting on the second face urges the drive piston in a second direction. First and second overridable detents drivingly couple the drive piston and the drive rod for movement in first and second directions, respectively. The coupling force provided by the first detent varies with the pressure of the fluid to which the first face of the drive piston is exposed, and the coupling force provided by the second detent varies with the pressure of the fluid to which the second face of the drive piston is exposed.

US Patent:

45609675, Dec 24, 1985

Filed:

Apr 4, 1984

Appl. No.:

6/596490

Inventors:

Charles T. Lindsey - Irvine CA

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

H01F 708

US Classification:

335262

Abstract:

A direct drive valve wherein a force motor (10) controls the position of a valve slide (20) through a linkage (14). The force motor includes a spring assembly (62) having cantilevered springs (68 and 70) that include petals (72). The armature (48) of the force motor is guided by a plurality of balls (84) that contact both an internal tube assembly (47) and the armature.

US Patent:

45636648, Jan 7, 1986

Filed:

Apr 4, 1984

Appl. No.:

6/596491

Inventors:

Philip C. Chin - Huntington Beach CA
Charles T. Lindsey - Irvine CA

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

H01F 708

US Classification:

335274

Abstract:

A direct drive valve wherein a force motor (10) controls the position of a valve slide (20) through a linkage (14). The force motor includes a spring assembly (62) having cantilevered springs (68 and 70) that include petals (72). The armature (48) of the force motor is guided by a plurality of balls (84) that contact both an internal tube assembly (47) and the armature.