Patents by Inventor P. A. Saigh

P. A. Saigh 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: 4791688
    Abstract: A jet pump macerator pump sewage handling system which provides a unique waste control system for use in mobile units such as passenger trains and ships in which multiple toilets are connected to a transfer manifold pipe which communicates with a non-clogging jet pump which is formed with a venturi and through which liquid material is driven by a macerator pump. Waste material from the toilets is drawn by the jet pump through the transfer manifold pipe and discharged into the retention tank. The macerator pump withdraws material from the retention tank, grinds it and discharges it back into the retention tank. The macerator pump has a self-cleaning feature in that it reverses and cleans itself whenever a loss in discharge pressure due to excessive solids loading is sensed. The transfer manifold pipe is virtually free from clogging due to the action of an air induction valve which keeps waste material in the manifold pipe moving without allowing it to accumulate.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: December 20, 1988
    Assignee: Chamberlain Manufacturing Corporation
    Inventors: C. K. Krishnakumar, P. A. Saigh