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:
May. 08, 1990
Filed:
May. 05, 1988
Friedrich Stolte, Halle, DE;
Westfalia Separator AG, Oelde, DE;
Abstract
A device for closing off a liquid-supply channel with an axially moving diaphragm. One face of the diaphragm demarcates a control space that is located in a lid and that can be connected either to the atmosphere or to a source of vacuum through a control valve. The other face of the diaphragm demarcates a product space that is also vacuumized and that accommodates the liquid-supply channel such that the diaphragm can, in one of its limiting positions, close the opening of the channel. To decrease the level of force required for initiating the action and to make the device less expensive, a signal generator is positioned in the lid of the control space and activates the control valve when the diaphragm approaches the lid, thereby connecting the control space with the atmosphere.