Harry A. Petrak

Person

Boulder, CO, US

People

Patents Grantslast 30 patents

Information Patent Grant
Remote-activated, power shift clutch assembly with positive locking
- Patent number 5,123,513
- Issue date Jun 23, 1992
- Boulder 12 Investments
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Remote-activated, power shift clutch assembly
- Patent number 5,044,479
- Issue date Sep 3, 1991
- Boulder 12 Investments
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Ground clutch assembly with dynamic engagement and disengagement
- Patent number 4,694,943
- Issue date Sep 22, 1987
- Boulder 12 Investments
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Synchronized clutch assembly with selective override for four-wheel...
- Patent number 4,557,358
- Issue date Dec 10, 1985
- Tenneco Inc.
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Force-responsive shock absorbing apparatus
- Patent number 4,396,098
- Issue date Aug 2, 1983
- Boulder 12 Investments
- Harry A. Petrak
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Live spindle wheel assembly with torque responsive drive engagement...
- Patent number 4,378,868
- Issue date Apr 5, 1983
- Tenneco Inc.
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Live spindle vehicle drive wheel assembly with axially moveable axle
- Patent number 4,331,210
- Issue date May 25, 1982
- Tenneco, Inc.
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Automatic clutch assembly
- Patent number 4,287,972
- Issue date Sep 8, 1981
- Harry A. Petrak
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Torque responsive hub clutch
- Patent number 4,262,785
- Issue date Apr 21, 1981
- The Mechanex Corporation
- Larry B. Anderson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Automatic locking gear for four wheeled drive vehicles
- Patent number 4,238,014
- Issue date Dec 9, 1980
- Harry A. Petrak
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Harry A. Petrak

Person

Patents Grantslast 30 patents

Remote-activated, power shift clutch assembly with positive locking

Remote-activated, power shift clutch assembly

Ground clutch assembly with dynamic engagement and disengagement

Synchronized clutch assembly with selective override for four-wheel...

Force-responsive shock absorbing apparatus

Live spindle wheel assembly with torque responsive drive engagement...

Live spindle vehicle drive wheel assembly with axially moveable axle

Automatic clutch assembly

Torque responsive hub clutch

Automatic locking gear for four wheeled drive vehicles