Patents by Inventor Rohland A. Dahlquist

Rohland A. Dahlquist 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: 4645438
    Abstract: A rotary fluid pressure device (11) is disclosed of the type having a fluid displacement means (17), an inlet port (57), an outlet port (61) and a valve means (55) which cooperates with a housing (21;101;201) to define a main flow path communicating from the inlet to the volume chambers of the mechanism (17) and then to the outlet. The device includes an arrangement such as an orifice (89) or shuttle valve (111) having its inlet in communication with the main flow path downstream of the contracting volume chambers (29). The motor includes a lubricant flow path (81,83; 107,109; 207) which provides lubricant to the bearings and shaft splines. The orifice (89) or shuttle valve (111) provides a generally constant flow of lubricant despite variations in the motor load or motor speed.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: February 24, 1987
    Assignee: Eaton Corporation
    Inventor: Rohland A. Dahlquist