Christopher S Gruber

US Patent:

6431839, Aug 13, 2002

Filed:

Dec 13, 2000

Appl. No.:

09/735815

Inventors:

Christopher Gruber - Cincinnati OH
Todd A. Reger - Westchester OH

Assignee:

Campbell Hausfeld/Scott Fetzer Company - Harrison OH

International Classification:

F04B 5300

US Classification:

417234, 417235, 417313, 417415, 417201, 417368, 415 76

Abstract:

An apparatus comprises a tank, an air compressor, and a motor with an output shaft. A fan is mounted on the output shaft. A drive assembly interconnects the motor operatively with the compressor. The apparatus further includes a base structure and a shroud. The base structure is configured to support the compressor, the motor and the drive assembly on the tank. The shroud is configured to cover the compressor, the motor, the drive assembly and the base structure on the tank. The shroud has a cooling air inlet port and a cooling air outlet port. A plurality of internal wall portions of the shroud are configured to direct cooling air to flow over the motor and the compressor upon flowing through the cover from the inlet port to the outlet port under the influence of the fan.

US Patent:

D580514, Nov 11, 2008

Filed:

Feb 28, 2008

Appl. No.:

29/304302

Inventors:

Gary S. Bass - Independence KY, US
Ronald J. Mulford - Aurora IN, US
Christopher Gruber - Cincinnati OH, US
Christopher D. Klein - Cincinnati OH, US

Assignee:

Campbell Hausfeld/Scott Fetzer Company - Harrison OH

International Classification:

2301

US Classification:

D23223, D23226

US Patent:

D581483, Nov 25, 2008

Filed:

Feb 28, 2008

Appl. No.:

29/304304

Inventors:

Gary S. Bass - Independence KY, US
Ronald J. Mulford - Aurora IN, US
Christopher Gruber - Cincinnati OH, US
Christopher D. Klein - Cincinnati OH, US

Assignee:

Campbell Hausfeld/Scott Fetzer Company - Harrison OH

International Classification:

2301

US Classification:

D23223, D23226

US Patent:

8267666, Sep 18, 2012

Filed:

Mar 9, 2010

Appl. No.:

12/719898

Inventors:

Christopher Gruber - Cincinnati OH, US
David O. Shumate - Lawrenceburg IN, US
Steven R. Salmons - Saint Louis MO, US
Jeffrey P. VanHorn - Saint Louis MO, US

Assignee:

Campbell Hausfeld/Scott Fetzer Company - Harrison OH

International Classification:

F04B 49/00

US Classification:

417 26, 137223, 137227, 13763022, 1375122, 13711806, 137107, 417 442, 417303

Abstract:

An apparatus includes a valve housing having an inlet port, a first chamber with a first outlet port, and a second chamber with a second outlet port. A first valve opens between the inlet port and the first chamber under a first level of pneumatic pressure at the inlet port. A second valve opens between the first chamber and the second chamber under a second, greater level of pneumatic pressure in the first chamber. A third valve opens between the second chamber and the first chamber under a third level of pneumatic pressure in the second chamber, with the third level being less than the first level.