Quick closing emergency valve
US4004601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Oct 2, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1834
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve mechanism is disclosed comprising valve body means with a fluid flow passage communicating an inlet and an outlet. A valve for controlling the flow of fluid through the fluid flow passage is connected to a stem which extends outwardly from the valve body. Handle means externally secured to the stem include a cam operable against the valve body for actuating the valve away from a seat within the valve body. A shut-off spring functions to urge the valve toward its valve seat. Cooperating latching means are provided on the handle means and stem to lock the parts with less than 90.degree. rotation of the handle means. Release means cooperate with the latching means to free the handle means for rotation and permit the stem to move so that the main spring can close the valve. The handle, latching means, and stem are arranged to rotate so as to permit actuation of the handle in any position about 360.degree. of the axis of rotation of the stem. Preferably, the latch incorporates a fusible member that will yield in the event a predetermined temperature is exceeded to permit release of the latch from the latch hook and enable the valve to be seated against the valve seat. The cooper…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.