Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7886764 | Automatic annular valve A metallic separating plate 6 is arranged between the sealing rings 5 and the synchronizing plate 7 to prevent mutual wear of the sealing rings 5 and the synchronizing plate 7 in an annular valve having sealing rings 5 as se... | 02/15/2011 |
| 7240796 | Packaging release valve for refrigerated food items A valve assembly is provided for venting pressurized gases generated from within an enclosed package during a heating of the package. The valve assembly has a membrane element, a tubular body and a retaining member. The tubular body has an open end, a closed end and... | 07/10/2007 |
| 6796741 | In-situ bioremediation process and apparatus A process and apparatus for the in-situ bioremediation of aquifers contaminated with chemicals by delivering a chemical degrading bacterial culture using a bacterial slurry delivery apparatus, which is designed to prevent backflow of soil and clogging of the apparat... | 09/28/2004 |
| 6575192 | Check valve for a prechamber assembly The invention relates generally to a check valve and more particularly to a check valve for a fuel passage of a prechamber assembly of an internal combustion engine comprising a carrier member, a stop member, and a ring member. The ring member is resilien... | 06/10/2003 |
| 6510868 | Profiled plate valve The subject application is directed to a compressor valve having a valve seat, a valve guard and a sealing plate with contoured sealing surfaces, the valve seat having defining inlet flow ports for admitting a controlled medium into the valve, the lower s... | 01/28/2003 |
| 6490738 | Overflow preventor An overflow preventer comprising a plug receivable in a drain hole and provided with a valve movable between a first closed position and a second open position, the valve being resiliently biased to the first position while the pressure on the valve is le... | 12/10/2002 |
| 6149400 | Method and apparatus for a suction valve of the plate-type construction Method for the stepless regulation of the delivery of a suction valve of the plate-type of construction, comprising a valve plate which is actuated by an electromagnet arranged in a valve catcher, wherein the electromagnet is so controlled that, in a firs... | 11/21/2000 |
| 5669411 | Compressor valve A novel compressor valve is disclosed. Generally, the valve includes a valve guard containing a flange portion formed thereon. The valve will contain a valve seat adapted to engage the valve guard. The valve contains a first sealing plate and a second sea... | 09/23/1997 |
| 5620427 | Luer lock system An improved luer lock connector having a pair of tapered engagement surfaces between the hub and one of the two components of the luer connector. The tapered engagement surfaces provide a gradual frictional engagement when tightening the hub to minimize i... | 04/15/1997 |
| 5411054 | Positive displacement compressor A reciprocating positive displacement compressor is described. The positive displacement compressor has an intake or exhaust valve provided with a deformable seal means, such as a Belleville spring, that makes edge or area contact with a valve seat in the... | 05/02/1995 |
| 5390700 | Automatic valve An automatic valve for use in compressors or an otherwise non-return valve has a valve seat with passage channels which are controlled by a shutter blade (16). The shutter blade (16) includes a lock element (27) with concentric rings (19) connected togeth... | 02/21/1995 |
| 5311902 | Reciprocating compressor valve A reciprocating positive displacement compressor is described having an intake or exhaust valve provided with a deformable seal means, such as a Belleville spring, that makes edge or area contact with a valve seat in the closed condition of the valve, is ... | 05/17/1994 |
| 5215538 | Connector-activated in-line valve An in-line valve for a medical tubing set has a tubular member characterized by an internal annular valve seat and a generally circular rubber-like valve member disposed transversely of the tubular member with its edges fixed relative thereto and with a c... | 06/01/1993 |
| 5052434 | Valve, especially for compressors The valve, which is intended especially for compressors, comprises a valve seat (1) with passage channels (2), a catcher (3), and at least one sealing element (5), which is arranged in the intermediate space between the valve seat (1) and the catcher (3).... | 10/01/1991 |
| 5027784 | PCV system with a check valve device A PCV system with a check valve device oriented in a vertical direction and including a valve body, a seat member, and a stopper plate. The valve body includes a valve head constructed of elastomer. The seat member includes a valve seat surface on a lower... | 07/02/1991 |
| 4951706 | Flapper check valve This invention relates to a flapper check valve having a valve housing which has at least one outlet opening. A valve backer plate having a plurality of arcuate backer through holes is positioned generally parallel to a valve port plate having a plurality... | 08/28/1990 |
| 4945946 | Valve seat for a plate-type, fluid-control valve In lieu of the customary concentric annuli upon which to receive a ported valving plate, the seat has a plurality of lands at a common radial distance inwardly from the periphery thereof. The separations between the lands, circumferentially, define additi... | 08/07/1990 |
| 4913187 | Compressor valve with flat spring A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing member... | 04/03/1990 |
| 4889156 | Compressor valve with flat spring A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing member... | 12/26/1989 |
| 4854341 | Plate valve A compressor plate valve has a valve seat (1) with flow passages (6), a valve guard and a valve plate (7) formed from concentric rings (16, 17) joined together by radial webs (18). In order to damp the valve plate (7), and in particular to lessen its impa... | 08/08/1989 |
| 4852608 | Fluid control valve The valve, depicted as of the plate-type, has a ported valve seat, stop plate, and valving element (movable between the plate and seat) biased toward the seat by compression springs. Eight sets of compression springs are employed, in the disclosed embodim... | 08/01/1989 |
| 4705068 | Ported-plate, fluid control valve The valve comprises a configuration in which the flow-through paths are more uniformly and smoothly arranged, albeit incorporating additional paths vis-a-vis prior art valves of like overall dimensions. The additional paths are accommodated through relief... | 11/10/1987 |
| 4643220 | Unidirectional fluid control valve The valve employs a buffered valve seat; a buffer plate is interposed between the seat and the valving element. Consequently, the valving element can manifest an increased lift, whereby the valve will offer an improved performance, as the buffer plate dam... | 02/17/1987 |
| 4627464 | Unidirectional, fluid control valve The valve employs a buffered valve seat; a buffer plate is interposed between the seat and the valving element. Consequently, the valving element can manifest an increased lift, whereby the valve will offer an improved performance, as the buffer plate dam... | 12/09/1986 |
| 4532959 | Valving element for a plate-type valve The valving element, according to the first embodiment depicted, comprises a plate-type element having an undulated or scalloped edge or periphery. The plate-type element has a plurality of flow ports formed therein each of which subtends an arc drawn fro... | 08/06/1985 |
| 4526195 | Reinforced plastic structure such as a valve A valve structure having a seating member defining at least one valve opening, and having an outer body portion, a center core portion, and a plurality of arms extending from the center core to the outer body, there being seating means formed on the outer... | 07/02/1985 |
| 4516602 | Disc valve In the valve-plate of a disc-valve, frictionless guides are arranged in a balanced configuration from web center to web center, each guide situated above and between the edges of an adjacent seat-plate ring segment, so that the valve-plate is balanced aga... | 05/14/1985 |
| 4478243 | Valve assembly There are disclosed herein several embodiments of a pressure responsive discharge valve assembly particularly adapted for use in reciprocating type gas compressors. The valve assembly includes a discharge passage valve seat of frusto conical shape in whic... | 10/23/1984 |
| 4402342 | Compressor valve A compressor valve assembly for use with a gas compressor, comprises a valve seat, a valve guard, and between the valve seat and the valve guard a valve seat plate and a resilient valve member disposed side-by-side. These members are apertured with the ap... | 09/06/1983 |
| 4307751 | Plate valve A valve having a plurality of movable, coaxially arranged annular plates is characterized by the use of fiber reinforced plate members having a thickness of greater than 0.2 inches and, in a preferred embodiment, a thickness to width ratio in excess of 0.... | 12/29/1981 |
| 4278106 | Plate check valve A plate check valve having a housing for mounting across a fluid passsageway to prevent reverse flow therein; a cage detachably mounted on the housing; a plurality of annular, planar, coaxial, radially spaced seat plates releasably clamped between the hou... | 07/14/1981 |
| 4231394 | Closing member for a ring valve A closing member for a ring valve is a flexible reed of substantially semicircular form comprising an outer ring portion with mounting points at its ends, and a plurality of inner ring portions connected to the outer ring portion by at least one radial we... | 11/04/1980 |
| 4184818 | Valve for piston compressors and pumps The present invention relates to piston compressors and pumps and more particularly it relates to the valves used in these compressors. The valve according to the invention comprises a seat with gas passages and a plate with a Tee profile in cross section... | 01/22/1980 |
| 3981636 | Diaphragm vacuum pump To suck and discharge the air into and from a pressure reducing chamber of a vacuum pump, a check valve comprises a valve body made of plastic material in a mushroom configuration, and a plate member which includes a flat valve seat surface to be engaged ... | 09/21/1976 |
| 3935850 | Vapor regulating valve A vapor regulating valve for use in a system for mixing air with fuel vapor from a fuel tank is constructed so that fuel vapor pressure against a diaphragm actuates a valve to allow engine induction vacuum to be exerted against another diaphragm to actuat... | 02/03/1976 |
