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:
Feb. 05, 1985
Filed:
Nov. 02, 1983
Charles G Pickett, North Plainfield, NJ (US);
John G Charney, Colonia, NJ (US);
Marra Khasin, Rahway, NJ (US);
Purolator Inc., New Brunswick, NJ (US);
Abstract
An oil filter relief valve having a tension spring housing with oil inlets and a first end and a second end, the first end being located adjacent the mounting plate of the filter, a base being fixedly connected to the second end of the spring housing and tension abutting and extending into the centertube of the filter element, a valve seat having a pointed surface and being located in the base with a channel formed therein for conducting oil therethrough, a resilient piston normally abutting the valve seat in sealing relation, a relatively rigid piston support on the piston, and a tension spring positioned between the first end of the tension spring housing and the piston support to urge the piston into sealing relation against the valve seat. This relief valve opens when the pressure of the oil entering the oil inlets and the channel in the valve seat exceed a particular threshold amount, thus exerting a force on the piston greater than the downward force naturally exerted by the spring. The piston is then lifted from the valve seat and the oil is allowed to flow through the relief valve and by-pass the filter element to immediately re-enter the motor.