J. G. Fraser MacDonald

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Detroit, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Clutch with fail-safe helical spring
- Patent number 4,418,811
- Issue date Dec 6, 1983
- Warner Electric Brake & Clutch Company
- J. G. Fraser MacDonald
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Anti-kickback clutch-brake unit
- Patent number 4,388,988
- Issue date Jun 21, 1983
- Warner Electric Brake & Clutch Company
- J. G. Fraser MacDonald
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Amplifying clutch with radially contractible shoe
- Patent number 4,330,054
- Issue date May 18, 1982
- Warner Electric Brake & Clutch Company
- J. G. Fraser MacDonald
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Amplifying clutch
- Patent number 4,286,701
- Issue date Sep 1, 1981
- Warner Electric Brake & Clutch Company
- J. G. Fraser MacDonald
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Electromagnetic clutch having a contractible friction shoe
- Patent number 4,201,281
- Issue date May 6, 1980
- Warner Electric Brake & Clutch Company
- J. G. Fraser MacDonald
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...