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:
Apr. 26, 1977
Filed:
May. 28, 1975
Friedrich Schittek, Bremen, DT;
Gustav F. Gerdts KG, Bremen, DT;
Abstract
A flap valve, in particular a return flap valve, having a flat disc valve housing with an associated valve seat and a locking member which is actuated in a stroke and pivot movement by two control levers of different lengths, the control levers being pivotably mounted with one of their free ends on the valve housing and with the other free ends on the locking member, and the pivot axes of both control levers being arranged parallel with respect to each other. The two control levers are articulated with one of their ends at the front face of the surface side pointing to the valve seat and with their other ends within the cross section of the valve flowthrough channel at the inlet side in front of the valve seat on the valve housing.