Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5507235 | Gravity outlet | Gregory Bertram | 1996-04-16 |
| 5448955 | Gravity outlet latching mechanism | Gregory Bertram | 1995-09-12 |
| 5355809 | Gasket for use on a railway hopper car outlet | — | 1994-10-18 |
| 5238333 | Pneumatic outlet for railcars | William U. Casseau | 1993-08-24 |
| 5236287 | Pneumatic outlet | Gary J. McClain | 1993-08-17 |
| 5232315 | End adapter for railcar pneumatic outlet | — | 1993-08-03 |
| 5178317 | Welding method for pneumatic outlet bottom cover assembly | Stephen A. Coughlin, Bob Barnes | 1993-01-12 |
| 5063858 | Covered hopper railway car with drop bottom doors and substantially vertical outlets to maximize discharge area | — | 1991-11-12 |
| 5000358 | Low profile pneumatic outlet | — | 1991-03-19 |
| 4944233 | Hatch arrangement for covered hopper cars | John W. Coulborn | 1990-07-31 |
| 4884723 | Hard gasket for retrofit installation on hopper outlet/hopper gasket outlet | — | 1989-12-05 |
| 4867073 | Internal drainage system for hollow member structural assembly and method | — | 1989-09-19 |
| 4768684 | Gasket for hopper outlet | — | 1988-09-06 |
| 4718795 | Unloading outlet assembly | — | 1988-01-12 |
| 4677917 | High volume covered hopper car with loading from below and automatic unloading | Eugene J. Cordani | 1987-07-07 |
| 4618295 | Plenum chamber flow restrictor and check valve | Jan D. Holt | 1986-10-21 |
| 4598646 | High volume covered hopper car | Donald E. Gruner | 1986-07-08 |
| 4568224 | Fluidizing outlet assembly including internal trough | James C. Hammonds | 1986-02-04 |
| 4544306 | Automatic unloading outlet assembly | — | 1985-10-01 |
| 4466558 | Aerator control arrangement | Dallas W. Rollins | 1984-08-21 |
| 4428585 | Permeable membrane seal assembly | — | 1984-01-31 |
| 4398557 | Combination vacuum relief valve and pressure relief valve | — | 1983-08-16 |
| 4382725 | Pneumatic outlet valve | — | 1983-05-10 |
| 4323096 | Combination vacuum relief valve and pressure relief valve which are protected from the atmosphere | Dallas W. Rollins | 1982-04-06 |
| 4278107 | Automatic vacuum relief valve for hopper cars | Arnold Schlobohm | 1981-07-14 |