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| Number | Title | Issue Date |
| 8028715 | Check valve for vacuum sewage pipe and vacuum sewage system The present invention provides a check valve for use in a vacuum sewage pipe. The check valve includes a body having a sewage inlet and a sewage outlet to be coupled to the vacuum sewage pipe, a flap valve element disposed in the body and rotatably supported by a fi... | 10/04/2011 |
| 7207348 | Machine comprising a safety valve for the supply of pressurised fluid The safety valve comprises a body and an obturator movable in the body between a closed position (FIG. 2) and an open position (FIG. 3). It also comprises means for displacing the obturator in order to displace it towards its closed position when the p... | 04/24/2007 |
| 7000854 | Pullout spray head with single-button mode selector A spray head for a faucet or the like has a wand body defining a flow path from an inlet to first and second outlets. Diverter seats are provided so a face seal on a diverter spool can direct flow to the first or second outlet. The spool is positioned by a trigger a... | 02/21/2006 |
| 6880767 | Two trigger safety circuit for water cleaning lance A two-handle cleaning lance includes a pair of switches which must be held closed by an operator to allow high pressure water to be directed to a discharge nozzle. A dump valve is selectively actuated to dump the high pressure water to a dump nozzle at which it will... | 04/19/2005 |
| 5860446 | Method and apparatus for safely controlling fluid flow A method and apparatus for safely controlling fluid flow comprises a safety control valve that automatically stops fluid flow upon a fluid pressure failure, requires two-handed manual operation to open the valve, and the valve being biased to prevent bein... | 01/19/1999 |
| 5709239 | Automatic shut-off safety device A compact, automatic mechanical fluid shut-off device which can detect a sustained leak in a pipe as well as a pipe burst and automatically shuts off fluid flow in the pipe. The device is detachable, easy to install, and easy to retrofit into existing pip... | 01/20/1998 |
| 4224962 | Change valve A change valve for sanitary engineering to select either a bath tub or shower head for discharge of water includes a telescoping connection between a valve actuating device and a valve element to achieve reliable operation in the presence of low water pre... | 09/30/1980 |
| 4044790 | Self re-arming valve A dump valve which automatically closes (re-arms) when the system pressure reaches a predetermined level.... | 08/30/1977 |
| 3933444 | Flash back arrestor A flash back arrestor for use in gas supply lines. The arrestor includes an elongated passageway through which the gases flow in one direction and through which the flash back must pass in the reverse direction. A pressure-actuated valve at the inlet end ... | 01/20/1976 |
