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| Number | Title | Issue Date |
| 5992452 | Ball and seat valve assembly and downhole pump utilizing the valve assembly Disclosed is a system used to increase the wear life of ball and seat valves and of ball and seat valves utilizing a piston mechanism to unseat the ball from the seat, which during operation, create turbulent flow within the valve preventing sand and othe... | 11/30/1999 |
| 5803434 | Automatic shut-off device for single lever tap A single-lever tap closable by a load added thereon after pulling up a knob, wherein, the knob is provided with a pivot connector pivotally provided on the top of a main body and is coupled to an output valve, a force exertion portion is formed by extendi... | 09/08/1998 |
| 5259411 | Flow control A flow control has a rotary gate residing within an internal flow space in a conduit. The gate is mounted for movement relative to the conduit between first and second positions, the gate in the first and second positions accounting for a different flow r... | 11/09/1993 |
| 5094428 | Passively actuated valve A valve comprises a valve body extending vertically, provided with an inlet conduit and an outlet conduit, at the interior of which there is located a suitable weighted shutter arranged for sliding in a guided manner between opening and closing positions ... | 03/10/1992 |
| 4813481 | Expendable flapper valve A flapper valve assembly includes a frangible valve closure member which is supported by an elastomeric hinge. The frangible valve closure member is a tempered glass plate, and the hinge is a block of elastomer material which is secured to the glass plate... | 03/21/1989 |
| 4787869 | Water lock device for marine propulsion Several embodiments of marine propulsion exhaust systems including water lock devices for precluding the entry of water into the engine through its exhaust ports. In each embodiment, the water lock device comprises a control valve that has flow openings f... | 11/29/1988 |
| 4630760 | Magnadrum pump assembly A positive displacement pump type fluid dispensing system for viscous fluids in upright-open ended cylindrical containers. The system comprises a base adapted to receive and substantially center the container, a ram plate which is carried by a vertical el... | 12/23/1986 |
| 4560143 | Pressure cooker relief valve assembly A relief valve assembly for pressure cookers in which the valve port is controlled by a predetermined weight. A skirt portion forming part of the mass of the weight surrounds the valve port so forming a chamber. The skirt portion has an opening in it such... | 12/24/1985 |
| 4553731 | Fail-closed, tight seal gas safety valve system A fail-closed gas safety valve system for blast furnace stove operations employing two tight seal butterfly valves, one a gas shutoff valve and the other a gas regulating valve, which together operate to prevent the leakage of hazardous gas into a blast f... | 11/19/1985 |
| 4498876 | Water shutter A valve (22) is provided in the exhaust system of a marine engine (11) which discharges its exhaust underwater. The valve (22) includes a valve member (23) formed of a stainless steel plate (24) and of silicon rubber (29). Holes (28) are provided in the p... | 02/12/1985 |
| 4217929 | Flow control composite valve A compound meter assembly is provided having primary and secondary passageways housing a high flow rate meter and a low flow rate meter, respectively. A composite flow responsive first valve is disposed within the secondary passageway and moves to a subst... | 08/19/1980 |
| 3996961 | Flow regulator for air ducting A flow regulator for air ducting comprises a flap which can be rotated about a shaft against the action of a spring, by the air current, to regulate air flow therepast. The flap has two portions which are disposed at an obtuse angle to each other about a ... | 12/14/1976 |
| 3982560 | Ventilating apparatus for heat transfer systems Apparatus for introducing fresh, outside air to a forced air heating or cooling system of buildings comprising a conduit for conducting fresh air to the system, a damper movably mounted in the conduit for adjusting the flow of fresh air therein, and a cou... | 09/28/1976 |
| 3948318 | Flow controlling safety valve A well safety valve comprises: A tubing in a well and having a first side port through which well production fluid is flowable, B first means including a valving sleeve movable up and down between predetermined positions on the tubing to control flow of produc... | 04/06/1976 |
