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| Number | Title | Issue Date |
| 7207350 | Pressure valve The invention relates to a pressure valve with a flow passage (3) having a valve body (14) and a lifting plate (21) that has a surface area A2 transversally of the flow passage (3) that exceeds the cross sectional area A1 ... | 04/24/2007 |
| 6263907 | Valve device of a storage tank for transporting oils or chemical compounds A valve device for a storage tank for transporting oils or chemical compounds, includes an upper body having a V-shaped valve seat at an upper end thereof. At least one screw hole with a closing cock is provided in the upper body. A lower body connected t... | 07/24/2001 |
| 5873384 | Pressure relief valve for pressure equalization between a closed space and the surrounding atmosphere A pressure relief valve includes a valve housing and a drop-shaped body with a conical valve surface that cooperates with a conical valve seat at an upwardly directed blow-off opening of the valve housing. The drop-shaped body is connected to a lifting di... | 02/23/1999 |
| 5307831 | Safety relief valve for pressure vessels A fluid pressure safety relief system for a pressure vessel (10) having a main valve member (46) seating on a nozzle ring (38) under a mechanical force of a predetermined amount resulting from a calibrated counterweight (54). An operating rod (55) is conn... | 05/03/1994 |
| 5078177 | Pop-type relief-valve construction The invention contemplates an improved poppet-type relief-valve construction which features an inlet-port configuration at upstream offset from the valve-closed seat region of the valve. To open the valve, a valve member must be moved by upstream pressure... | 01/07/1992 |
| 5060688 | Pressure relief valve for pressure equalization between a closed space and the surrounding atmosphere A pressure relief valve for pressure equalization between a closed space and the surrounding atmosphere comprises a valve housing (1) with an upwardly facing blow-off opening (11) in which a conical valve seat (13) is formed. A drop-shaped body (14) arran... | 10/29/1991 |
| 4727903 | Fluid shutoff valve An excess pressure and/or excess flow/temperature shutoff valve comprising a valve housing having an axial bore therethrough with inlet and outlet ends, a portion of the bore being enlarged to form a valve chamber, and a spool movable in the valve chamber... | 03/01/1988 |
| 4598685 | Fuel pumping apparatus A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a valve means operable to control the spillage of fuel from a high pressure pump. The valve means includes first and second valve elements connected by a pivotal beam ca... | 07/08/1986 |
| 4092998 | Automatic pressure regulator An automatic pressure regulator of the rolling diaphragm type requiring but one single rolling diaphragm. The diaphragm is of the deep convolution type. The rolling wall of the diaphragm controls the effective cross-sectional area of an orifice means whic... | 06/06/1978 |
| 3980135 | Self-contained, retrievable valving assembly An assembly adapted to be anchored at a subsurface location within a tubular well conduit to function as a self-closing safety valve. The assembly includes a flapper valve closure element pivotably mounted in a tubular valve housing and controlled by a pr... | 09/14/1976 |
