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| Number | Title | Issue Date |
| 6973936 | Fluid injection system A fluid injection system controls the distribution of fluid from a supply line to a selected well at an adjustable rate. A fluid barrier divides a cylinder into first and second chambers. A multi-position valve comprises a first position for passing fluid from the s... | 12/13/2005 |
| 6032528 | Flow meter having cylinders with freely movable pistons therein The invention relates to a flow meter and in particular to a flow meter suitable for connection into a fluid conduit. The flow meter has an inlet and an outlet for connection into a fluid line and includes interconnected cylinders, each cylinder having a ... | 03/07/2000 |
| 4993262 | Apparatus for monitoring flow of a fluid along a conduit Apparatus 1 for monitoring flow of fluid, such as domestic water, along a conduit 2 comprising a piston and cylinder arrangement 3 having a plurality of free pistons 4 and 5, and port means 6 which are so arranged with respect to the pistons 4 and 5 that ... | 02/19/1991 |
| 4984461 | Fluid flow sensor A fluid flow sensor comprises a housing having a fluid inlet and a fluid outlet, a measuring chamber in the housing connected at opposite ends to both the fluid inlet and the fluid outlet, a member in the chamber movable between opposite ends of the chamb... | 01/15/1991 |
| 4802362 | Fluid flow sensor A fluid flow sensor comprises a housing having a fluid inlet and a fluid outlet, a measuring chamber in the housing connected at opposite ends to both the fluid inlet and the fluid outlet, a member in the chamber movable between opposite ends of the chamb... | 02/07/1989 |
| 4635476 | Fluid flow sensor A fluid flow sensor comprises a housing having a fluid inlet and a fluid outlet, a measuring chamber in the housing connected at opposite ends to both the fluid inlet and the fluid outlet, a member in the chamber movable between opposite ends of the chamb... | 01/13/1987 |
| 4192185 | Flowmeter for liquids A flowmeter for measuring the throughput of a liquid from a source to a load, especially for gasoline, diesel oil, heating oil and the like, comprises at least two measuring cylinders having floating pistons and respective reversing elements which have tw... | 03/11/1980 |
| 4055084 | Liquid flow meter construction A liquid flow meter comprises a housing having a cylindrical piston chamber and a control chamber. A measuring piston is movable in the piston chamber and a flow control slider is movable in the control chamber and it has respective oppositely directed co... | 10/25/1977 |
