Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9416789 | Valve cover geometry | — | 2016-08-16 |
| 6817846 | Gas compressor and method with improved valve assemblies | — | 2004-11-16 |
| 6712363 | Compression ring sealing device with end gap control and a method of manufacturing same | Larry A. Schnautz | 2004-03-30 |
| 6655935 | Gas compressor comprising a double acting piston, an elongate chamber, multiple inlets mounted within heads on both sides of the chamber, and one central outlet | Dale George, Derek Woollatt, Tim Miller, Charles Seavey, Steve Chaykosky +1 more | 2003-12-02 |
| 6318967 | Gas compression kit and method with interchangeable compression cylinders | William C. Wirz | 2001-11-20 |
| 5727930 | Valves and rod assembly | Daniel Valla | 1998-03-17 |
| 5564906 | Means for moving a valve within a gas compressor having a straight cylinder | Derek Woollatt | 1996-10-15 |
| 5378116 | Over-pressure relief means | Derek Woollatt | 1995-01-03 |
| 5378117 | Valve unloading means, and a valve unloading actuator therefor | — | 1995-01-03 |
| 5236008 | Sealing ring carrier and valve support | — | 1993-08-17 |
| 5209647 | Straight cylinder gas compressor with a reduced diameter compression chamber | — | 1993-05-11 |
| 5141413 | Gas compressor having a variable-volume clearance pocket, and means for varying a clearance pocket in a gas compressor | — | 1992-08-25 |
| 5062311 | Frame, crankshaft and crosshead assembly, and a crankshaft and crosshead frame, for a reciprocating-piston machine | — | 1991-11-05 |
| 5015158 | Gas compressor | — | 1991-05-14 |
| 5011383 | Valve assembly, for use in combination with a straight-cylinder, gas-compression chamber, and in combination therewith | — | 1991-04-30 |
| 4872395 | Crosshead per se, and in combination with a connecting rod assembly and a piston rod | Alan C. Anderson | 1989-10-10 |
| 4852608 | Fluid control valve | — | 1989-08-01 |
| 4607660 | Uni-directional-flow, fluid valve assembly | — | 1986-08-26 |
| 4495964 | Unidirectional-flow fluid valve | — | 1985-01-29 |