Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6722256 | Reduced icing valves and gas-driven motor and diaphragm pump incorporating same | Charles O. Roberts, Michael Conti, Gordon M. Schroeder | 2004-04-20 |
| 6145430 | Selectively bonded pump diaphragm | Stephen D. Able | 2000-11-14 |
| 5649813 | Chamber insulation for prevention of icing in air motors | Stephen D. Able, Douglas D. Purdy | 1997-07-22 |
| 5584666 | Reduced icing air valve | Robert C. Elfers | 1996-12-17 |
| 5559310 | Muffler for air operated reciprocating pumps | Rick D. Hoover, Joseph W. Sullivan | 1996-09-24 |
| 5527160 | Mechanical shift, pneumatic assist pilot valve | Richard K. Gardner | 1996-06-18 |
| D370488 | Diaphragm pump | Robert C. Elfers, Douglas D. Purdy | 1996-06-04 |
| 5391060 | Air operated double diaphragm pump | Gerald M. Distel | 1995-02-21 |
| 5348046 | Spring check valve cartridge | Gerald M. Distel | 1994-09-20 |
| 5108270 | Conductive plastic fluid handling equipment | — | 1992-04-28 |
| 4936753 | Diaphragm pump with interchangeable valves and manifolds | Richard K. Gardner | 1990-06-26 |