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| Number | Title | Issue Date |
| 7836748 | Chamber sealing valve According to some embodiments, a test fluid may be provided into a chamber associated with a cooling system for an electronic integrated circuit. Moreover, a valve may be partially inserted into an opening of the chamber to seal the chamber. The valve may include a ... | 11/23/2010 |
| 7299675 | Fuel level sensor calibration A method of calibrating a level sensor installed in an empty tank. In the tank, the level sensor includes a float that is allowed to rest against a first stop, such as the tank bottom or tank top. This position of the float is stored as a first level, such as a mini... | 11/27/2007 |
| 7225680 | Differential pressure gauge for filter An apparatus for measuring the differential pressure of fluid in filter. The apparatus comprises a housing defining a pressure chamber. A differential pressure gauge divides the pressure chamber into first and second fluid chambers. The differential pressure gauge i... | 06/05/2007 |
| 7055390 | Seal assembly with means for detecting seal failure A seal assembly includes a first body and a second body. A primary seal is disposed between the first body and the second body. A secondary seal is disposed between the first body and the second body in spaced relation to the primary seal. A pressure port extends th... | 06/06/2006 |
| 6595040 | Test leak unit A test leak unit (1) includes a supply of test gas, preferably helium, and an element (14) for determining leakage rates. The aim of the invention is to create a simple, robust and easily refilled test leak unit, especially for detecting packaging leaks. ... | 07/22/2003 |
| 5363689 | Calibration device for leak detecting instruments A leak detector calibration device for generating a leak standard and for calibrating leak detecting instruments. The leak detector calibration device includes a flow control valve, a transducer, an amplifier module, and a display module, all operating fr... | 11/15/1994 |
| 5052212 | Dynamic leak detector A dynamic leak detector is connected to a fluid flowmeter prover. The prover has a measurement chamber with a fluid inlet and a fluid outlet and a barrier which moves axially through the chamber between the fluid inlet andc the fluid outlet. First and sec... | 10/01/1991 |
| 4829808 | Flow meter prover apparatus and method A prover to calibate flow meters is disclosed which includes a cylinder and by-pass valve in parallel flow paths, both in a series flow path with the meter to be proved. A piston is disposed to traverse the cylinder exiting the upstream end into an enlarg... | 05/16/1989 |
| 4718267 | Meter provers A meter prover comprises an upstream chamber (1) with a port (2) a downstream chamber (3) with a port (4) either port for connection to a meter (not shown) to be proved, a stationary seal (5) between the two chambers, a piston body (6) within and bridging... | 01/12/1988 |
| 4637244 | Meter provers A meter prover employs a piston arranged to slide in a bore within a proving cylinder which is coaxially disposed within a surrounding cylindrical shell. The effective area of the upstream face of the piston which can be acted on by fluid pressure is less... | 01/20/1987 |
| 4628724 | Meter provers A meter prover comprises a cylinder (16) having a proving bore (22) and enlarged end chambers (20). A piston (12) is mounted within the cylinder for movement along the bore in sealed engagement therewith, the axial length of the piston exceeding that of t... | 12/16/1986 |
| 4606218 | Compact bidirectional meter prover mechanism A compact bidirectional meter prover mechanism incorporates a straight calibration barrel having spaced detectors sensing passage of a fluid induced displacer piston. A four-way control valve is connected by flow conduits to the conduit containing the flo... | 08/19/1986 |
| 4569220 | Flow prover with seal monitor A flow prover with seal monitor includes a housing with a cylinder and a piston-like displacer sealingly conveyed along the cylinder by the fluid flow to be measured. The displacer includes at least one rod that extends telescopically through the housing.... | 02/11/1986 |
| 4549426 | Compact flow prover A compact flow prover for calibrating continuous flowmeters includes a measuring housing comprising a main cylinder having a substantially uniform inside diameter and inlet and downstream sections having inside diameters greater than the main cylinder. Th... | 10/29/1985 |
| 4481805 | Meter prover apparatus and method According to the invention, fluid is adapted to flow through a piston and cylinder disposed in the housing of a meter prover. The cylinder is telescopingly received within the piston. The fluid is permitted to flow into the piston and cylinder through an ... | 11/13/1984 |
| 4475377 | Double wall meter prover Apparatus for use in calibrating a meter having an outer tubular housing closed at each end, a reduced diameter and reduced length inner tubular barrel supported within the outer house providing an annular space between the exterior of the barrel and the ... | 10/09/1984 |
| 4372147 | Flow meter prover apparatus and method A flow meter prover is disclosed which includes an outer fluid housing having an inlet and an outlet, a measuring conduit coaxially mounted within the outer housing and having first and second sets of fluid apertures adjacent, respectively, the upstream a... | 02/08/1983 |
| 4347731 | Control apparatus for meter prover Apparatus for calibrating a flow meter under test is disclosed as including a chamber having an opening to be coupled by a conduit to the fluid meter under test, a piston to be driven by a motor in a first direction and in a second direction. A first valv... | 09/07/1982 |
| 4152922 | Apparatus and method for determining the characteristic of a flowmeter A measuring cylinder has at its ends an inlet and an outlet connected in a fluid system in series with a flowmeter. A measuring piston is adapted to travel through the measuring cylinder as a fluid barrier. A poppet valve on the inlet side of the measurin... | 05/08/1979 |
| 4134288 | Liquid meter prover apparatus Apparatus comprising an interchange which receives a sphere from a meter prover loop after a meter prover run and which launches the sphere into the loop to commence a run. An assembly within the body of the interchange is movable between sphere receiving... | 01/16/1979 |
| 3943749 | Unidirectional meter prover sphere interchange and method A unidirectional meter proving device in which the interchange for transferring a sphere from a receiving tee at the downstream end of the prover loop to a launch tee at the inlet end of the loop includes a reciprocating tubular sphere carrier which moves... | 03/16/1976 |
