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:
Oct. 10, 1989
Filed:
May. 24, 1988
Robert P Pflum, Indianapolis, IN (US);
Caltherm Corporation, Columbus, IN (US);
Abstract
A check valve for an engine cooling system includes opposite ports and a venting plug press fit in one of the ports. The venting plug defines an opening which allows fluid flow through the valve, and a jiggle pin is positioned in the opening. The jiggle pin has a head on one side of the venting plug for sealing the opening, an anchor on the opposite side for retaining the jiggle pin in the opening and a neck connecting the head with the anchor. A bleed notch is defined in a periphery of the opening to permit restricted fluid flow past the venting plug, even when the head of the jiggle pin is sealed. The ends of the check valve have external threads and different diameters for securing the valve in different size opening, and the venting plug can be press fit into its port in either of two orientations so that either the anchor or the head is positioned between the venting plug and the end of the valve.