Jon Patrick Shafer

US Patent:

42784034, Jul 14, 1981

Filed:

Sep 6, 1979

Appl. No.:

6/072903

Inventors:

Jon L. Shafer - Houston TX

International Classification:

F04B 4902

US Classification:

417 38

Abstract:

A hydraulic accumulator system comprising an accumulator tank (22) for storing hydraulic fluid supplied by a pump (P) from reservoir (10), the stored fluid being pressurized by gas from gas tank (28), a control tank (35)connected at one end to the fluid supply (10) and at the other end to the gas supply (28), and a piston (36) in said control tank (35) having differential areas exposed to said fluid and said gas, said piston having means (41) for actuating a switch (43) to control said pump (P).

US Patent:

41021282, Jul 25, 1978

Filed:

Jul 1, 1977

Appl. No.:

5/812140

Inventors:

Jon L. Shafer - Houston TX
William K. LeBlanc - Mansfield OH

Assignee:

Shafer Valve Company - Mansfield OH

International Classification:

F15B 2000
F15B 1309

US Classification:

60400

Abstract:

A hand pump system which allows normal automatic operation of a fluid motor operator for a pipeline valve by pipeline pressure, and also provides a stand-by hand pump while may be manually connected to a pressure fluid storage in the system for operating the fluid motor operator in either direction. The hand pump is connected into the system in such manner as to prevent accidental actuation of the pump handle by a pressure surge in the pipeline.

US Patent:

62729039, Aug 14, 2001

Filed:

Feb 22, 2000

Appl. No.:

9/511180

Inventors:

Jon Lawrence Shafer - Houston TX

International Classification:

G01M 308

US Classification:

73 46

Abstract:

A leak indicating system for a pipeline valve, the valve for selectively controlling the flow of oil through the pipeline, the leak indicating system including a hollow can with a can interior and an open top end, the hollow can in fluid communication with part of the apparatus, a lid releasably closing off the open top end of the hollow can, and a spring compressed beneath the lid and held in compression by an oil-dissolvable member so that, upon dissolution of the oil dissolvable member by oil leaked from the apparatus and flowing into the hollow can and contacting the oil dissolvable member, the spring is released to launch the lid away from the hollow can. The system further includes a can top releasably secured over the open top end of the hollow can, the can top having a hole therethrough, the lid mounted above the can top, and the spring extendable through the hole in the can top. The system wherein the lid has at least one surface with visually sightable indicia thereon.