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:
Mar. 24, 1981
Filed:
May. 09, 1979
Lothar Bendig, Ludwigsburg, DE;
Richard Hoferer, Bissingen, DE;
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Abstract
A one-way throttling valve for use in the vacuum line of a pneumatic membrane actuator which controls the combustion air temperature of a carburetor-euipped internal combustion engine by means of an air flow proportioning flapper admitting cold raw air and/or preheated raw air into a duct junction upstream of the intake filter, the throttling valve having a tiny throttling orifice which remains open, while the throttling valve itself is closed, thereby delaying the removal of negative pressure from the pneumatic actuator. The one-way throttling valve may be arranged in one of the two vacuum line connectors of the valve housing of a thermostat relief valve.