Patents by Inventor Richard K. Schaefer

Richard K. Schaefer 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: 5446393
    Abstract: Electrical connections to extremely small contact points or test connections are obtained by a tool which includes a stable base having a deformable flexible shaft extending therefrom. A needle type contact point in a spring biased mounting subassembly maintains contact electrically as the tip is forced against the test point by the shaft. The connector can include shielding against Radio Frequency Interference (RFI) or Electromagnetic Interference (EMI).
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: August 29, 1995
    Inventor: Richard K. Schaefer
  • Patent number: 5270999
    Abstract: A retainer assembly (10) comprises a retainer member (24) and a spring (36). The spring (36) works in combination with a conical surface (34) on the hub (12) and a conical surface (28) on the retainer member (24). Depending upon magnitudes of defined angles A and W, the assembly (10) resists any axial force (42) that may act to disengage the disk (14) from the hub (12). The angles A and W are variable so long as a coefficient of friction .mu. between the conical surface (34) or the conical surface (28) and the ring (36) is greater than the tangent of one half the angle W.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: December 14, 1993
    Assignee: Conner Peripherals, Inc.
    Inventors: H. Ross Chessman, F. Eugene Dion, Mark A. Swenson, Aaron MacPherson, Richard K. Schaefer