Patents by Inventor William G. Fenrich

William G. Fenrich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Metering pump controlled oil injection system for two cycle engine
    Patent number: 4955943
    Abstract: An oil injection system is provided for a two cycle crankcase compression internal combustion engine. A metering pump (74) draws oil from an oil tank (52) and controls the amount of oil supplied to the fuel supply system upstream of the fuel delivery device (24). The fuel supply system and the metering pump are both variably controlled by the fuel supply control (28).
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: September 11, 1990
    Assignee: Brunswick Corporation
    Inventors: Robert J. Hensel, William G. Fenrich
  • Solenoid controlled oil injection system for two cycle engine
    Patent number: 4887559
    Abstract: An oil injection system is provided for a two cycle crankcase compression internal combustion engine. A crankcase pressure driven oil pump (70) draws oil from an oil source (52, 54) and delivers pumped oil through an oil output line (64) to the fuel supply system. A solenoid valve (72) in the oil output line controls the flow of pumped oil to the fuel supply system.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: December 19, 1989
    Assignee: Brunswick Corporation
    Inventors: Robert J. Hensel, William G. Fenrich
  • Staged hydraulic trim-tilt system
    Patent number: 4687449
    Abstract: A hydraulic trim-tilt system for an outboard motor (10) utilizes a first pilot operated relief valve (48) in one trim piston (21) to limit the stroke of the trim pistons (21, 22) under load. After the trim pistons have reached the top of their stroke, under reduced load, the first pilot operated relief valve (48) is blocked and a second pilot operated relief valve (58) operates to allow a higher pressure to be supplied to the trim-tilt unit (16) to lift the outboard propulsion unit (15) in a higher shallow water drive range.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: August 18, 1987
    Assignee: Brunswick Corporation
    Inventor: William G. Fenrich