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:
Jan. 03, 1995
Filed:
Oct. 26, 1992
Hans-Peter Schabert, Erlangen, DE;
Erwin Laurer, Mohrendorf, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A valve, particularly for shutting off a flow, includes a housing. A rotationally fixed threaded part is rotationally fixed and axially displaceable in the housing. A rotatable threaded part is axially resiliently and rotatably supported in the housing. A brake device has at least two friction surfaces facing one another. One of the friction surfaces is rotationally fixed in the housing, and the other of the friction surfaces is rotationally fixedly joined to the rotatable threaded part. The friction surfaces are pressed against one another by an axial displacement for braking a rotary motion of the rotatable threaded part and forming a braking surface, if a predetermined command force upon the rotationally fixed threaded part is exceeded. At least one of the friction surfaces has a predetermined free angle for rotational fixation. According to one embodiment of the invention, at least one brake ring is axially displaceably disposed on the rotatable threaded part, and the other of the friction surfaces is located on the at least one brake ring. According to another embodiment of the invention, a brake sleeve being axially displaceable in the housing has an end surface, and the one friction surface is disposed on the end surface of the brake sleeve.