Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456220 | Nozzle assembly for top operating rod | Joel A. Mingus | 1984-06-26 |
| 4447039 | Bottom operable tank car valve having external rotation stop | — | 1984-05-08 |
| 4440380 | Wedgeball valve | John A. Hrinsin | 1984-04-03 |
| 4440379 | Bottom operator for top operated bottom installed tank car valve assembly | David P. Hillstead | 1984-04-03 |
| 4397444 | Tank car bottom outlet valve having combination ring and valve seat | — | 1983-08-09 |
| 4372025 | Light source to locate nozzle in tank | — | 1983-02-08 |
| 4327768 | Bottom outlet valve open and closed indicator | — | 1982-05-04 |
| 4326557 | Top operated tank car bottom outlet valve assembly installed from the bottom of the car | — | 1982-04-27 |
| 4313591 | Combination top operable and bottom operable tank lading valve assembly | Richard J. Wempe | 1982-02-02 |
| 4272053 | Combination top operable and bottom operable tank lading valve assembly | Richard J. Wempe | 1981-06-09 |
| 4270729 | Top operated tank car clapper value | David P. Hillstead | 1981-06-02 |
| 4268010 | Operating handle for bottom operated railway tank car valve | — | 1981-05-19 |
| 4234158 | Combination tank car valve skid and valve seat wherein the skid is welded to the valve seat | Dallas W. Rollins, Charles E. Reedy | 1980-11-18 |
| 4234159 | Combination tank car valve skid and valve seat in which end portions on the skid are attached to the tank with fasteners which do not require stress relieving of the tank | Dallas W. Rollins, Charles E. Reedy | 1980-11-18 |
| 4234160 | Operating handle for bottom operated tank car valve having movable connection portion | — | 1980-11-18 |
| 4212447 | Operating handle for bottom operated railway tank car valve | — | 1980-07-15 |
| 4198032 | Bottom operable tank car lading valve assembly which does not require a skid | David P. Hillstead, Robert W. Randolph | 1980-04-15 |
| 4184663 | Combination tank car valve skid and valve seat | Dallas W. Rollins, Charles E. Reedy | 1980-01-22 |