Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7140387 | Regulated gas supply system A regulated gas supply system having a body defining a pressurized gas reservoir connected to a high-pressure regulator that regulates the high pressure gas from the gas reservoir to disperse the gas at a desired pressure. The gas regulating assembly includes a pist... | 11/28/2006 |
| 6564827 | Shut-off device for the filling device of a pressure tank The invention relates to a shut-off apparatus for the charging device of a pressure vessel, especially for the storage of cryogenic liquefied gases, having a shut-off valve with a valve housing and a valve body stressed by a closure spring which, in order... | 05/20/2003 |
| 4651768 | Servovalve for pipe flange connection The flow controlling valve, particularly mounted in a pipe flange structure, comprises a cylindrical housing, a flow passage whose cross section is controllable, a valve seat, and a valve member and at least one auxiliary valve mounted in the housing. The... | 03/24/1987 |
| 4366834 | Back-flow prevention valve A back-flow prevention valve assembly is disclosed for use with a vacuum pump or the like and employs a valve element movable between positions opening or closing a passageway through the assembly. In the event of pump failure, a control valve, which is o... | 01/04/1983 |
| 4192344 | Automatic emergency stop apparatus against counter flow and counter fire of gas bodies An automatic emergency stop apparatus which prevents counter flow and counter fire of gas bodies. The apparatus comprises a check valve, a cut-off valve and a filter unit. The check valve is positioned in the gas inlet portion of a decomposable closed-typ... | 03/11/1980 |
| 3962884 | Piloted freeze throttling valve A piloted refrigerant valve for an air conditioning system to control refrigerant pressure within an evaporator to prevent frost accumulation on its exterior surfaces. The valve includes a disc-shaped hollow thermal sensor filled with water which solidifi... | 06/15/1976 |
| 3942333 | Suction throttling valve A suction throttling valve is provided which is especially adapted for use as a part of a compact unit consisting of a thermostatic expansion valve, a suction throttling valve, and a receiver-dryer, in an automotive air conditioning system. The suction th... | 03/09/1976 |
