Patents by Inventor Martyn R. G. Yates

Martyn R. G. Yates 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: 4618425
    Abstract: A submersible pump and filter unit for pumping and filtering acids comprises a removable pump cartridge (13) and filter unit (14) housed in respective cylindrical cavities (11, 12) in a housing (10). The pump cartridge (13) is a gas-driven double acting bellows unit with a cylindrical body (13A), the bellows (21, 22) and the body (13A) being formed of PTFE. Each bellows (21, 22) is at a respective end of a reciprocating rod (36) which is journaled coaxially in the body (13A) and which extends through a central aperture (16) in the body (13A). Control gear including a logic control valve (41) is housed in the aperture (16) and is thereby encased in PTFE structure and shielded from acid.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: October 21, 1986
    Assignee: Production Techniques Limited
    Inventor: Martyn R. G. Yates