Patents Assigned to Petro Rubber Hi-Tec, Inc.
  • Swabbing apparatus
    Patent number: 4771675
    Abstract: A swabbing apparatus has a plurality of swab cups molded on a single core, with at least two swab cups having a different fluid load carrying capacity, so that the swabbing apparatus will have a relatively broad fluid load carrying capacity. Each swab cup has one or more lips with the fluid load carrying capacity of a swab cup being determined primarily by lip thickness.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: September 20, 1988
    Assignee: Petro Rubber Hi-Tec, Inc.
    Inventors: James E. Grauer, Douglas E. McLaughlin