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:
Dec. 01, 1987
Filed:
Sep. 22, 1986
Paul A Knapp, Tempe, AZ (US);
Other;
Abstract
Valve apparatus for draining oil from a vehicle crankcase includes a valve body having a pair of intersecting bores. One of the bores communicates with the vehicle crankcase and receives oil therefrom. A tubular insert extends into the intersecting bore, with part of the insert extending outwardly from the valve body. The end of the insert which is disposed within the valve body comprises a valve seat, and a spring-loaded ball check is disposed within the tubular insert. The spring biases the ball against the seat until low pressure is applied to the insert to withdraw the ball from the seat. When the ball is withdrawn from the seat, oil is drained from the crankcase. A hose or tube is secured to the end of the insert outside of the valve body and is appropriately connected to a source of low pressure for draining the oil.