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| Number | Title | Issue Date |
| 4178638 | Split leaflet check valves The invention concerns improvements in a split leaflet check valve. A pair of curved leaflets are hinged to a base ring for swinging movement from a normally closed position to an open position whenever a fluid is moving through the conduit wherein the va... | 12/18/1979 |
| 4173985 | Straightway valve A straightway valve for a positive-displacement machine comprises a polyhedral body with outlet ports and seat surfaces on the sides thereof, flat friction-free closure plates, and a means for attachment of the closure plates to the body, which takes the ... | 11/13/1979 |
| 4159025 | Back flow preventer valve A back flow preventer valve assembly for protecting fluid supply systems against back flow of contaminating fluids includes a pair of serially connected check valves positioned within respective housings which are connected together and to inlet and outle... | 06/26/1979 |
| 4139469 | Fluid control mechanism A fluid control mechanism utilizing a housing having an opening or tunnel through the interior of the same. The housing provides at least one chamber communicating with the housing opening. A seat positions within the housing opening and the chamber. A pl... | 02/13/1979 |
| 4132241 | Flow control device A flow control device is provided for delivering a fluid flow in one direction only while providing for venting of a backflow of fluid in an opposite direction wherein a plurality of self-contained check valve units are slideably received in an elongated ... | 01/02/1979 |
| 4114202 | Prosthetic valve assembly for use in cardiovascular surgery Cardiovascular malfunction is corrected by implantation through open-heart surgery of a prosthetic valve assembly in which a specially formed valve retainer ring, designed to be secured within a blood vessel by means of sutures, supports a plurality of va... | 09/19/1978 |
| 4111228 | Respiratory valve, especially for anaesthetic circuits A respiratory valve, especially for use in the circuits of anaesthetic gas devices, having a body member formed with two arms in a V configuration, intended for inhalation and exhalation, respectively, and a tubular mouthpiece fitting. To the two arms are... | 09/05/1978 |
| 4106522 | Pressure relief valve Calibrated pressure relief valve constituted by a body, a closure member, a piston which slides tightly in a bore and defines in the body an exhaust chamber and an adjustment chamber, a member for returning the closure member, interposed between said latt... | 08/15/1978 |
| 4100934 | Reciprocating refrigerant compressor valve arrangement An annular valve stop insert for a compressor body is shown which has the function of establishing the positional relationship of the valve plate, valve and compressor body.... | 07/18/1978 |
| 4096997 | Dual outlet check valve assembly A non-clogging check valve assembly useful in the simultaneous dispensing of individual components of a two-part grouting material. Two opposed flexible outlet nozzles mounted adjacent one another in a body member allow the components to be dispensed in a... | 06/27/1978 |
| 4054152 | Check valve A check valve has a valve member seated on a separating wall member in a housing to interrupt the flow of fluid. The valve member is formed to be unseated from the separating wall member in its free state so that the fluid may flow through a clearance bet... | 10/18/1977 |
| 4034860 | Telescoping shock absorber with plural valves In a telescoping shock absorber which has a cylinder containing a damping medium and a piston slidably disposed in the cylinder, within the confines of the cylinder there are provided separate first and second channels provided with valves. The valves are... | 07/12/1977 |
| 4032266 | Valve assembly for reciprocating downhole pumps A valve device for controlling fluid flow into and out of the working chamber of a reciprocating pump. A valve body axially receives the pump connecting rod and includes circumferentially extending, alternately arranged, intake ports and exhaust passagewa... | 06/28/1977 |
| 4027853 | Valve plate having improved suction gas flow path A valve plate for use in a reciprocating gas compressor is disclosed wherein lower and upper members are held in spaced apart relation so as to define a suction gas flow path therebetween. A corrugated element is located in the flow path and bonded to sai... | 06/07/1977 |
| 4026322 | Reciprocating pump check valve assembly A valve assembly especially adapted for use with very high pressure reciprocating pumps. The main components are coaxially aligned. A main high pressure passage extends through the center of the assembly and has check valves at opposite ends thereof. One ... | 05/31/1977 |
| 4019525 | Tractor protection valve A tractor protection valve for use in the air brake system of a tractor-trailer vehicle combination to protect and maintain the braking system of the tractor includes a housing having tractor supply and control ports, trailer supply and control ports, and... | 04/26/1977 |
| 4003398 | Pressure limiter device A pressure limiting device for protecting a fluid pressure circuit involves a stack of elastomeric washers, and each of the washers has a slit through which fluid can bleed to reduce the fluid pressure below a critical value; the slits are normally closed... | 01/18/1977 |
| 3998571 | Valve retainer An economical valve assembly for mounting resilient metal leaf valves for the cylinder of a reciprocating compressor. A valve plate with suction and discharge ports has a discharge leaf or flapper valve with a mounting portion secured thereto by a pair of... | 12/21/1976 |
| 3974854 | Valve particularly adapted for utilization in controlling the flow of blood A permanently implantable artificial heart utilizing a pulsatile magneto-motive pump consisting of a pump chamber, which has two cobalt rare-earth permanent magnets spaced apart relative to one another so that unlike poles of each magnet face each other a... | 08/17/1976 |
