The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1981
Filed:
Nov. 13, 1979
Leonard Gordon, Tarzana, CA (US);
Other;
Abstract
Apparatus is disclosed for preventing the buildup of excessive water pressure underneath a water tank, tub or spa which is placed in the ground while at the same time preventing the inflow of waste particles or the outflow of water from the tank, tub or spa. The apparatus includes a pressure sensitive relief valve in combination with a multiple stage filtering system. The filtering system includes a central collection tube wrapped with filter material, around which filtering particles are packed, all of which are enclosed in a filter cage. The valve unit is positioned such that it draws only from the collection tube. Means are provided for securing the assembly to the underside of the water tank.