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. 28, 1995
Filed:
Nov. 30, 1993
Richard Voss, Schwerte, DE;
Wolfgang Voss, Schwerte, DE;
Richard Voss Grubenausbau GmbH, Schwerte, DE;
Abstract
A pressure limiting valve with rates of flow of more than 8,000 l/min exhibits a valve casing comprising a control piston and valve piston. These valve casings are arranged inside the casing so as to be movable against corresponding springs, whereby the control piston and valve piston are separate units. The valve piston is arranged so as to be movable against an adjustment screw that is supported on the control piston side and has a through-bore that has a smaller diameter than the blind bore of the control piston. This special design of the valve ensures a uniform opening and reclosing of the pressure limiting valve for the described rates of flow, whereby suitable sealing rings consisting of Teflon are used in the area of the valve piston.