Patents by Inventor James M. Hamar

James M. Hamar 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).

  • Relay Valve Control Arrangement to Provide Variable Response Timing on Full Applications
    Publication number: 20150175139
    Abstract: A brake system and related components including a metering device are configured to regulate a control signal received from a brake control device such that a control valve delays the supply of a level of requested braking pressure for a prescribed amount of time. The metering device can be an inversion valve and orificed check valve in a control circuit adapted to allow relatively unrestricted flow until a threshold pressure is reached, after which pressure the inversion valve closes and the flow is metered through an orifice. This has the effect of allowing rapid brake actuation to a first level, and then slowing further application of the brake until full requested braking is achieved. An electronic control unit can also be configured to regulate a control signal to delay development of the requested brake pressure.
    Type: Application
    Filed: March 3, 2015
    Publication date: June 25, 2015
    Applicant: BENDIX COMMERCIAL VEHICLE SYSTEMS LLC
    Inventors: Charles E. Eberling, James M. Hamar, Travis G. Ramler, John V. Ripley
  • Relay valve control arrangement to provide variable response timing on full applications
    Patent number: 9002610
    Abstract: A brake system and related components including a metering device are configured to regulate a control signal received from a brake control device such that a control valve delays the supply of a level of requested braking pressure for a prescribed amount of time. The metering device can be an inversion valve and orificed check valve in a control circuit adapted to allow relatively unrestricted flow until a threshold pressure is reached, after which pressure the inversion valve closes and the flow is metered through an orifice. This has the effect of allowing rapid brake actuation to a first level, and then slowing further application of the brake until full requested braking is achieved. An electronic control unit can also be configured to regulate a control signal to delay development of the requested brake pressure.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: April 7, 2015
    Assignee: Bendix Commercial Vehicle Systems, LLC
    Inventors: Charles E. Eberling, James M. Hamar, Travis G. Ramler, John V. Ripley
  • RELAY VALVE CONTROL ARRANGEMENT TO PROVIDE VARIABLE RESPONSE TIMING ON FULL APPLICATIONS
    Publication number: 20130151105
    Abstract: A brake system and related components including a metering device are configured to regulate a control signal received from a brake control device such that a control valve delays the supply of a level of requested braking pressure for a prescribed amount of time. The metering device can be an inversion valve and orificed check valve in a control circuit adapted to allow relatively unrestricted flow until a threshold pressure is reached, after which pressure the inversion valve closes and the flow is metered through an orifice. This has the effect of allowing rapid brake actuation to a first level, and then slowing further application of the brake until full requested braking is achieved. An electronic control unit can also be configured to regulate a control signal to delay development of the requested brake pressure.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 13, 2013
    Inventors: Charles E. Eberling, James M. Hamar, Travis G. Ramler, John V. Ripley