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:
Sep. 04, 1990
Filed:
Nov. 08, 1988
Gary E Griffin, Penn Yan, NY (US);
Walter O Krause, Newark, NY (US);
Parker Hannifin Corporation, Cleveland, OH (US);
Abstract
A biflow filter drier has a pair of flapper-type check valve assemblies for directing fluid flow unidirectionally through a centrally supported molded desiccant core. Each check valve assembly is a three part structure spot welded into a unitary assembly comprising a centering support plate, a core support cup and an intermediate flapper valve plate. Two flapper valves are formed from the valve plate and comprise the check valves covering valve openings in the suport plate and support cup. The material which formed the central opening in the support plate is bent at an angle to the support plate and provides an overtravel stop for the check valve. An angled surface of the core support cup provides an overtravel stop for the second check valve.