Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 5404903 | Smart vent valve for cargo tanks employed in transporting hazardous commodities A "smart vent" valve is mounted on a liquid storage tank employed in the transportation of liquid. The valve prevents overpressurization of the tank due to increases in vapor pressure and prevents discharge of liquid through the valve in response to press... | 04/11/1995 |
| 5203466 | Fuel cap A fuel cap 1 for controlling the pressure within a fuel tank which has improved sealing properties between a valve member 43 of a pressure control valve 41 and a seat surface 35. The pressure control valve 41 opens and closes a flow path hole 33 in a cap ... | 04/20/1993 |
| 5174463 | Cap for a container, especially a vehicle radiator In a closure cap for a container, especially for a vehicle radiator, with an outer part (12), an inner part (16) of cup-shape connected with the outer part and insertable into the opening to be closed, and having an overpressure valve arranged in the inne... | 12/29/1992 |
| 5170818 | Safety valve A safety valve including a brass valve body having a through bore provided with a circular sharp-edged valve seat and another sharp edge. A valve stem carrying a ball valve and a biasing spring disposed in the through bore. A cap member screwed through on... | 12/15/1992 |
| 5161572 | Pressure valve A pressure valve, which is installed in the delivery line leading from a fuel injection pump to a fuel injection valve, and which has a valve closing member opening in the direction of delivery, which is provided with a return collar. To achieve uniform i... | 11/10/1992 |
| 5069188 | Regulated canister purge solenoid valve having improved purging at engine idle Improved idle purging is obtained in a regulated canister purge solenoid valve by communicating the atmospheric chamber space of the regulator mechanism to atmosphere through the canister and providing in the movable wall of the regulator mechanism an ori... | 12/03/1991 |
| 5054518 | Variable flow self-cleaning valve preferably for ventricular offtake branches of cephalorachidian fluid The present valve, employable by persons affected by hydrocephalus, permits discharge into suitable offtake branches of the excess cephalorhachidian fluid existing in the ventricles of the brain. The valve basically consists of a hollow cylindrical body (... | 10/08/1991 |
| 5039284 | Fuel pump with a vapor vent valve A positive displacement type pump for use in a fuel system of an internal combustion engine having a pump housing that includes a pump chamber and a vapor vent valve to allow vapor to flow out of the pump chamber. The vent valve includes a valve seat, a v... | 08/13/1991 |
| 5033506 | Delivery valve A delivery valve for controlling fuel flow from a fuel-injection pump to an internal combustion engine and comprising a seat member, a closing member movable relative to the seat member for controlling flow of fuel through the passage channel of the seat ... | 07/23/1991 |
| 5014759 | Vehicle wheel having valve means to prevent misuse A vehicle wheel that includes a valve which has a check device, with the wheel being intended for use with a pneumatic tire that even when operating as a tire which is flat or has otherwise lost pressure permits great distances to be covered at a reduced ... | 05/14/1991 |
| 4890640 | Drainage valve A drainage valve for use in pressure systems where pressure surges occur for draining an underground water system when the water pressure in the underground water system is off and for sealing the drainage valve against drainage when the water pressure is... | 01/02/1990 |
| 4846216 | Fluid power valve device A fluid power control valve apparatus is disclosed and is characterized by combining desirable features of both a spool type valve element and a poppet type valve element. A spool element is provided with one end adapted to be seated in a poppet valve sea... | 07/11/1989 |
| 4822112 | Modulator with two-stage orificed master cylinder bypass valve A vehicle wheel brake system having a service braking section and a wheel lock control (ABS) section is provided. Under certain conditions the wheel lock control section may not be able to generate sufficient pressure to operate the vehicle wheel brakes w... | 04/18/1989 |
| 4781213 | Ball check valve A ball check valve assembly for chemical pumps. A fluid conduit terminates at a first surface in a port of circular cross section. Within the conduit, an O ring seat is aligned with the port; an elastomeric O ring is positioned in the seat. Spacer means, ... | 11/01/1988 |
| 4756334 | Check-valve assembly, in particular for a pressurized water reactor This check-valve assembly, adapted to close a fluid flow circuit without creating overpressures or hammering in this circuit, comprises a tubular body (1) connected at both of its ends to a respective pipe section (2, 3), a closure member (4) mounted to b... | 07/12/1988 |
| 4719938 | Self-cleaning valve and cryopump utilizing the same The pressure relief valve is debris resistant, self-cleaning, and self-actuating in a cryopump. It includes an o-ring carried by a valve member within a valve cylinder. In opening, the valve member moves away from an end port to open vent ports in the sid... | 01/19/1988 |
| 4706705 | Check valve A miniaturized check valve comprises a generally tubular body including a cylindrical base and a guide sleeve of reduced diameter which axially extends from the base. The body forms a an interior valve seat which surrounds an axially extending fluid passa... | 11/17/1987 |
| 4648421 | Valve device for controlling liquid flow A valve device for use in filling cartons includes a tubular housing containing a valve member comprising a closure part co-operating with a valve seat at the lower extremity of the housing, and a driving part movably received with clearance in the housin... | 03/10/1987 |
| 4541455 | Automatic vent valve An automatic vent valve having a stoppage member within a flow chamber located between an inlet chamber and vent chamber with said stoppage member being biased against a lower seat. The stoppage member moves between said lower seat and an upper seat in re... | 09/17/1985 |
| 4532958 | Check valve having replaceable valve assembly A check valve having improved sealing qualities and provided in the form of a replaceable assembly of a valve member and valve seat to avoid the need to replace the valve housing. The sealing surfaces are defined by obliquely directed, outwardly tapering ... | 08/06/1985 |
| 4524799 | Delivery valves A delivery valve for use in a fuel injection system of an internal combustion engine comprises a valve body defining a bore in which is slidably mounted a valve member which is biased towards one end of the bore by a coiled compression spring. A first cir... | 06/25/1985 |
| 4524800 | One-way brake bleeder check valve with sealing cap A one-way brake bleeder check valve is shown for use in bleeding entrapped air from the hydraulic wheel brake cylinders of automobiles and the like. This brake bleeder valve has a one-piece valve body that is mounted as a permanent part of a wheel brake c... | 06/25/1985 |
| 4518329 | Wear resistant pump valve A fluid pressure energized wear resistant pump valve is provided having a valve body and seal retainer formed of metal which secure a seal insert in assembly therewith. The seal insert incorporates an elastomeric sealing portion having a frusto-conical se... | 05/21/1985 |
| 4445534 | 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... | 05/01/1984 |
| 4417861 | Cell culture pumping system A low trauma, reversible flow pumping system is disclosed which is useful for transfer of biological fluids containing fragile components such as cells. The pumping system comprises a length of collapsible and flexible tubing in fluid communication at eac... | 11/29/1983 |
| 4394945 | Valve having suck-back feature A valve assembly has a spring-biased discharge valve seated for closing the discharge whereafter product is sucked back from a discharge nozzle during a continued movement of the valve in the direction of closing. Parts of the valve may be relatively adju... | 07/26/1983 |
| 4373550 | Valve having a bias-mounted elastomeric sealing element, and method of constructing the same A radially inner portion of a flat annular elastomeric washer is inserted and retained in a frustoconical annular groove formed in a cylindrical valve seat of an inline disc check valve. The groove is positioned and dimensioned so that it grips the washer... | 02/15/1983 |
| 4346794 | Shock absorber with improved back check and anti-dump valve mechanisms A shock absorber of the direct acting type for vehicles in which improved riding characteristics are obtained by providing an additional back check valve mechanism and anti-dump valve mechanism. Both valve mechanisms are normally biased in a closed positi... | 08/31/1982 |
| 4340084 | Check valve A ball check valve having a body with a through passageway having an internally restrictive frustoconical seat is provided with a frustoconical metallic backup member having a different cone angle than the seat and a large diameter ball having a maximum d... | 07/20/1982 |
| 4287912 | Monoflow ball valve and system A monoflow ball valve is disclosed that is particularly suited using plastic materials that resist metal-corrosive acids, as in a spray system using hydrofluoric acid and the like. The valve has a valve body with a passage section smaller than the externa... | 09/08/1981 |
| 4192344 | Automatic emergency stop apparatus against counter flow and counter fire of gas bodies An automatic emergency stop apparatus which prevents counter flow and counter fire of gas bodies. The apparatus comprises a check valve, a cut-off valve and a filter unit. The check valve is positioned in the gas inlet portion of a decomposable closed-typ... | 03/11/1980 |
| 4191428 | Air brake system with pressure holding valve A vehicle air brake system includes spring set air released parking brakes to which air is supplied through a pressure holding valve which maintains the air chambers of the parking brakes at a predetermined pressure even though the air brake system may be... | 03/04/1980 |
| 4171712 | Fuel tank venting valve A venting valve connected to the interior of the fuel tank has a sliding piston and a plurality of springs which hold the piston in different operative positions dependent upon the amount of pressure within the tank.... | 10/23/1979 |
| 3930521 | Gas charging valve for accumulator This invention relates to the art of pressure vessels and more particularly to a valve assembly for use in a pressure vessel of the type having a rigid container with a deformable bladder therein, dividing the container into two variable volume chambers, ... | 01/06/1976 |
