Petrak; Harry A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Petrak; Harry A..The latest application filed is for "remote-activated, power shift clutch assembly with positive locking".
- Petrak; Harry A. - Boulder CO
| Patent | Date |
|---|---|
| Remote-activated, power shift clutch assembly with positive locking Grant 5,123,513 - Petrak June 23, 1 | 1992-06-23 |
| Ground clutch assembly with dynamic engagement and disengagement Grant 4,694,943 - Petrak September 22, 1 | 1987-09-22 |
| Synchronized clutch assembly with selective override for four-wheel drive vehicles Grant 4,557,358 - Petrak December 10, 1 | 1985-12-10 |
| Live spindle wheel assembly with torque responsive drive engagement means Grant 4,378,868 - Petrak April 5, 1 | 1983-04-05 |
| Live spindle vehicle drive wheel assembly with axially moveable axle Grant 4,331,210 - Petrak May 25, 1 | 1982-05-25 |
| Automatic clutch assembly Grant 4,287,972 - Petrak September 8, 1 | 1981-09-08 |
| Torque responsive hub clutch Grant 4,262,785 - Anderson , et al. April 21, 1 | 1981-04-21 |
| Automatic locking gear for four wheeled drive vehicles Grant 4,238,014 - Petrak December 9, 1 | 1980-12-09 |
| Shock absorbing apparatus Grant 3,896,908 - Petrak July 29, 1 | 1975-07-29 |
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