Patents by Inventor Carl E. Hudson

Carl E. Hudson 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: 4897022
    Abstract: A multiple pump supply system having multiple pumps placed in parallel and having a plurality of reservoirs connected to acommon discharge line. The pumps are operated sequentially on demand sensed by a pressure sensor located at the mouth of the first reservoir and controlling a first pump. Multiple sensors located at the mouth of a second reservoir control the subsequent pumps sequentially.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: January 30, 1990
    Inventor: Carl E. Hudson