Shut-off valve
US5377952A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18704
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.