Gary S Hueppchen

US Patent:

20060104833, May 18, 2006

Filed:

Nov 12, 2004

Appl. No.:

10/986752

Inventors:

Gary Hueppchen - Plymouth WI, US

International Classification:

F04B 39/02
F04B 35/04
F04B 17/00

US Classification:

417372000, 417415000, 417423900

Abstract:

A pump includes a housing, a shaft supported by the housing, a piston assembly, a fan blade, and a fan guard. The piston assembly includes a piston cylinder and is operably coupled to the shaft. The fan blade is operable to generate cooling flow. The fan guard is mounted to the housing and includes a channel configured to direct at least a first portion of the cooling flow to the piston cylinder.

US Patent:

20040184937, Sep 23, 2004

Filed:

Jan 27, 2004

Appl. No.:

10/765374

Inventors:

Gary Hueppchen - Plymouth WI, US

International Classification:

F04B039/00

US Classification:

417/434000

Abstract:

A high pressure/vacuum piston pump has a reciprocating piston in a cylinder which has a small, preferably about 0.05 inches in diameter, leak opening allowing some of the working air to leak to the pump housing during at least a portion of the piston stroke. The leak opening is coplanar with the drive shaft and the centerline of the cylinder. It is also located to be between the piston head and the valve head for the majority of the piston stroke but below the piston cup seal and closed off from the working chamber when the piston is at top dead center. During transient off periods of the pump the leak path relieves high pressure or vacuum gas in the cylinder allowing a low-torque motor to restart the pump reliably.