Randal A Winfrey

US Patent:

59924489, Nov 30, 1999

Filed:

Jan 21, 1998

Appl. No.:

9/010013

Inventors:

R. David Anderson - Wichita Falls TX
Carl Wayne Winfrey - Wichita Falls TX
Randal Alan Winfrey - Wichita Falls TX

International Classification:

F16K 3134

US Classification:

137414

Abstract:

A liquid level controller is shown having a housing with a rear wall. A shaft has a first end which extends through the rear wall to a liquid displacement member located within a liquid containing vessel. A second end of the shaft joins a pair of oppositely extending arms. Each of the oppositely extending arms is rotationally mounted on the housing generally parallel to the rear wall in a bearing. Vertical forces responsive to changes in liquid level act on the displacement member and are transmitted as a force tending to rotate the oppositely extending arms. A lever pivotally mounted to the housing is interconnected with a torque bar which, in turn, connects to the oppositely extending arms of the shaft. A valving assembly is engaged by the lever to provide an output for controlling liquid level within the vessel. The valve assembly includes a pneumatic pilot with a contact point which is engageable by a pin carried on the lever.

US Patent:

62409557, Jun 5, 2001

Filed:

Nov 24, 1999

Appl. No.:

9/448128

Inventors:

R. David Anderson - Wichita Falls TX
Carl Wayne Winfrey - Wichita Falls TX
Randal Alan Winfrey - Wichita Falls TX

Assignee:

Anderson Controls, L.C. - Wichita Falls TX

International Classification:

F16K 3134

US Classification:

137414

Abstract:

A liquid level controller is shown having a housing with a rear wall. A shaft has a first end which extends through the rear wall to a liquid displacement member located within a liquid containing vessel. A second end of the shaft joins a pair of oppositely extending arms. Each of the oppositely extending arms is rotationally mounted on the housing generally parallel to the rear wall in a bearing. Vertical forces responsive to changes in liquid level act on the displacement member and are transmitted as a force tending to rotate the oppositely extending arms. A lever pivotally mounted to the housing is interconnected with a torque bar which, in turn, connects to the oppositely extending arms of the shaft. A valving assembly is engaged by the lever to provide an output for controlling liquid level within the vessel. The valve assembly includes a pneumatic pilot with a contact point which is engageable by a pin carried on the lever.