Patents by Inventor Henry E. Czerwick

Henry E. Czerwick 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).

  • Patent number: 4621721
    Abstract: In a motor vehicle equipped with a countershaft manual transmission for producing various ratios of the speed of an engine that is clutched to the transmission and the speed of a transmission output shaft, a system for maintaining the clutch disengaged while the transmission shift lever is in the neutral position and the clutch pedal is released includes a hydraulic damper actuated by a clutch pedal arm that moves a piston within a master cylinder connected hydraulically through an interrupter valve to a slave cylinder, which is connected mechanically to a clutch arm whose movement engages and disengages the clutch. An electrical circuit includes an ignition switch in series with a neutral switch and with a clutch switch, an interrupter valve coil in series with the switches and a clutch switch relay in parallel with the clutch switch. When the electrical circuit is closed, the interrupter valve closes hydraulic communication between the master cylinder and the slave cylinder.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: November 11, 1986
    Assignee: Ford Motor Company
    Inventors: Henry E. Czerwick, Richard A. Petts, Raymond R. Russell