Jan S Davidson

US Patent:

6688859, Feb 10, 2004

Filed:

Jan 6, 2003

Appl. No.:

10/338106

Inventors:

Tom Graber - Longmont CO
Paul Klimek - New Ulm MN
Jan Davidson - Springfield MN

Assignee:

Coleman Powermate, Inc. - Kearney NE

International Classification:

F04B 1700

US Classification:

417368

Abstract:

An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump frame of the gas compressor includes a lipless bearing bore, decreasing the distance between the portion of the frame supporting the bearing and the piston. The pump frame is flat such that a portion of the cylinder is over a portion of the motor. The flatness of this arrangement increases the strength of the pump frame. The piston bearing bore includes two clamping structures having screw holes. Each screw hole is formed from a series half-cylinder or barrel portions, which individually do not form the complete circumference of a hole. Such a screw hole does not require a core pull on casting, lowering manufacturing costs. The piston includes a piston seal which is angled with respect to the piston.

US Patent:

6890158, May 10, 2005

Filed:

Jan 6, 2003

Appl. No.:

10/338252

Inventors:

Tom Graber - Longmont CO, US
Paul Klimek - New Ulm MN, US
Jan Davidson - Springfield MN, US

Assignee:

Powermate Corporation - Aurora IL

International Classification:

F04B039/06

US Classification:

417368

Abstract:

An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump frame of the gas compressor includes a lipless bearing bore, decreasing the distance between the portion of the frame supporting the bearing and the piston. The pump frame is flat such that a portion of the cylinder is over a portion of the motor. The flatness of this arrangement increases the strength of the pump frame. The piston bearing bore includes two clamping structures having screw holes. Each screw hole is formed from a series half-cylinder or barrel portions, which individually do not form the complete circumference of a hole. Such a screw hole does not require a core pull on casting, lowering manufacturing costs. The piston includes a piston seal which is angled with respect to the piston.

US Patent:

6905315, Jun 14, 2005

Filed:

Jan 6, 2003

Appl. No.:

10/338272

Inventors:

Tom Graber - Longmont CO, US
Paul Klimek - New Ulm MN, US
Jan Davidson - Springfield MN, US

Assignee:

Powermate Corporation - Aurora IL

International Classification:

F04B039/06
F04B023/08

US Classification:

417368, 417321

Abstract:

An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump frame of the gas compressor includes a lipless bearing bore, decreasing the distance between the portion of the frame supporting the bearing and the piston. The pump frame is flat such that a portion of the cylinder is over a portion of the motor. The flatness of this arrangement increases the strength of the pump frame. The piston bearing bore includes two clamping structures having screw holes. Each screw hole is formed from a series half-cylinder or barrel portions, which individually do not form the complete circumference of a hole. Such a screw hole does not require a core pull on casting, lowering manufacturing costs. The piston includes a piston seal which is angled with respect to the piston.

US Patent:

6991436, Jan 31, 2006

Filed:

Jul 29, 2002

Appl. No.:

10/207448

Inventors:

Kurt Beckman - Springfield MN, US
Andrew Kopel - Stanchfield MN, US
Paul Klimek - New Ulm MN, US
Jan Davidson - Springfield MN, US

Assignee:

Powermate Corporation - Aurora IL

International Classification:

F04B 23/14

US Classification:

417201, 417312, 417234, 417415, 417368

Abstract:

An air compressor having a cooling fan that cools both a pump and an electric motor. Baffle compress air against the top of the motor, causing it to break up and flow around fours sides of the motor and through the motor. The pump includes an elongate intake tube or muffler that attenuates pump intake noise. A compressor tank for the air compressor includes a roll cage for protecting a condensate valve for the compressor tank. The compressor tank includes a rim base formed on the bottom of the compressor tank that permits the compressor tank to rest on a surface without additional supports or legs. Controls and gauges are mounted in the bottom clamshell piece, and openings on a top fit around the controls and gauges. The top and the bottom are aligned with guides so that the controls and gauges may be properly aligned with the openings.

US Patent:

7063515, Jun 20, 2006

Filed:

Jan 6, 2003

Appl. No.:

10/338211

Inventors:

Tom Graber - Longmont CO, US
Paul Joseph Klimek - New Ulm MN, US
Jan Davidson - Springfield MN, US

Assignee:

Powermate Corporation - Aurora IL

International Classification:

F04B 17/00

US Classification:

417368

Abstract:

An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump frame of the gas compressor includes a lipless bearing bore, decreasing the distance between the portion of the frame supporting the bearing and the piston. The pump frame is flat such that a portion of the cylinder is over a portion of the motor. The flatness of this arrangement increases the strength of the pump frame. The piston bearing bore includes two clamping structures having screw holes. Each screw hole is formed from a series half-cylinder or barrel portions, which individually do not form the complete circumference of a hole. Such a screw hole does not require a core pull on casting, lowering manufacturing costs. The piston includes a piston seal which is angled with respect to the piston.

US Patent:

6530760, Mar 11, 2003

Filed:

Aug 11, 2000

Appl. No.:

09/637560

Inventors:

Tom Graber - Longmont CO
Paul Klimek - New Ulm MN
Jan Davidson - Springfield MN

Assignee:

Coleman Powermate, Inc. - Kearney NE

International Classification:

F04B 3910

US Classification:

417545

Abstract:

An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump frame of the gas compressor includes a lipless bearing bore, decreasing the distance between the portion of the frame supporting the bearing and the piston. The pump frame is flat such that a portion of the cylinder is over a portion of the motor. The flatness of this arrangement increases the strength of the pump frame. The piston bearing bore includes two clamping structures having screw holes. Each screw hole is formed from a series half-cylinder or barrel portions, which individually do not form the complete circumference of a hole. Such a screw hole does not require a core pull on casting, lowering manufacturing costs. The piston includes a piston seal which is angled with respect to the piston.