Issued Patents All Time
Showing 25 most recent of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39217 | Centrifugal pump having oil misting system with pivoting blades | — | 2006-08-01 |
| 6913438 | Pump lubrication system including an external reservoir | — | 2005-07-05 |
| 6672830 | Vertical pump with oil lubricant; C-seal for pump; and pump with threaded shaft position adjustment | — | 2004-01-06 |
| 6659720 | Vertical pump with oil lubricant, C-seal for pump; and pump with threaded shaft position adjustment | — | 2003-12-09 |
| 6551055 | Centrifugal pump having oil misting system with pivoting blades | — | 2003-04-22 |
| 6468028 | Vertical pump with oil lubricant; C-seal for pump; and pump with threaded shaft position adjustment | — | 2002-10-22 |
| 6367807 | Labyrinth seal assembly | — | 2002-04-09 |
| 5823539 | Environmentally safe pump having a bellows seal and a split ring shaft seal | — | 1998-10-20 |
| 5823744 | Centrifugal pump with means for preventing impeller from unscrewing off of shaft | — | 1998-10-20 |
| 5772396 | Pump having flush system for seal arrangement | — | 1998-06-30 |
| 5727792 | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump | — | 1998-03-17 |
| 5647735 | Centrifugal pump having oil misting system with pivoting blades | — | 1997-07-15 |
| 5642888 | Temperature and pressure resistant rotating seal construction for a pump | — | 1997-07-01 |
| 5632608 | Pump oil mister with reduced windage | — | 1997-05-27 |
| 5591020 | Pump oil mister | — | 1997-01-07 |
| 5553867 | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump | — | 1996-09-10 |
| 5513964 | Pump oil mister with reduced windage | — | 1996-05-07 |
| 5499901 | Bearing frame clearance seal construction for a pump | — | 1996-03-19 |
| 5499902 | Environmentally safe pump including seal | — | 1996-03-19 |
| 5494299 | Temperature and pressure resistant rotating seal construction for a pump | — | 1996-02-27 |
| 5484267 | Cooling device for a pump and corresponding barrier tank | — | 1996-01-16 |
| 5411366 | Motor driven environmentally safe pump | — | 1995-05-02 |
| 5340273 | Sealing and pumping means and methods environmentally leak-proof pump with misting chamber defined therein | — | 1994-08-23 |
| 5261676 | Sealing arrangement with pressure responsive diaphragm means | — | 1993-11-16 |
| 5035436 | Housing seal chamber body | Henry S. Duffee, James M. Downing | 1991-07-30 |