Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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 |
| 5025640 | Refrigerant expansion device for optimizing cooling and defrost operation of a heat pump A refrigerant expansion device for use in a refrigeration system includes a body having a flow passage extending therethrough. A piston having a flow metering port therethrough is moveably mounted within the flow passage. A flow metering rod is supported ... | 06/25/1991 |
| 5002089 | Variable area refrigerant expansion device for heating mode of a heat pump A refrigerant flow metering device for use in a refrigeration system includes a housing having a flow metering passage extending therethrough. A partition is located within the flow passage of the housing and defines a flow metering port therethrough. The... | 03/26/1991 |
| 4989590 | Irrigation appliance An irrigation appliance uses a reservoir which inverts to form a cover and includes a simplified valve in the reservoir as well as a switching mechanism adapted thereto. Liquid delivered to the unit from the reservoir is controlled as to pressure by adjus... | 02/05/1991 |
| 4962548 | Valve assembly A plumbing arrangement is described for a toilet pan connected to a waste disposal pipe. The waste pipe has an extension extending a short height above the flood level of the water trap. The upper end of the extension is closed off by a two way differenti... | 10/16/1990 |
| 4958654 | Check valve with ephemeral seal A normally closed check valve has an ephemeral seal on the entry side thereof which blocks fluid flow through the check valve at pressure differentials acting across the check valve which would normally open the check valve and cause fluid flow to occur t... | 09/25/1990 |
| 4949750 | Surge reliever relief valve A surge reliever relief valve is provided in which a flexible membrane is maintained in a peripherally sealed relationship across a rigid grid. The grid bounds the laterally adjacent intake and output regions of the valve. Intake pressure extends the memb... | 08/21/1990 |
| 4923602 | Bi-directional flow filter A bi-directional flow filter including a block having first and second peripheral ports with a forward line of flow through the block from the first peripheral port to the second peripheral port and a reverse line of flow through the block from the second... | 05/08/1990 |
| 4899855 | Piston assembly having an outer skirt and a spaced inner core The assembly, mounted on a piston rod, is constructed as a piston body (1) having a cylindrical skirt and oil passages (4a) between the skirt and a cylindrical core (3) for fastening to the piston rod, and a double-acting floating valve in the form of an ... | 02/13/1990 |
| 4872475 | Adjustable differential flow shuttle valve The present invention is a one-way fluid valve which consists of a shuttle chamber (29) with its two ends connected with the two fluid openings (22,22'), a shell (2) incorporating a by-pass (20) which is connected with the two ends of the shuttle chamber,... | 10/10/1989 |
| 4872474 | Diverter valve One end of a valve assembly has a first check valve arrangement and is positioned in a channel connecting a variable volume reservoir and a second chamber. The other end of the valve assembly has a second check valve and is attached to a movable wall of t... | 10/10/1989 |
| 4858736 | Shock absorber for a hydropneumatic vehicle suspension element Shock absorber (31) for a hydropneumatic vehicle suspension element, comprising a disk (32) fastened in an outer casing having ports (30, 38) for the passage of the hydraulic fluid, first elements (48, 49, 37a, 37b) allowing this passage in only one direc... | 08/22/1989 |
| 4823922 | Heavy duty vehicular shock absorber A vehicular shock absorber is disclosed and includes a two-piece piston head, one piece being the mirror image of the other, mated by a pin. The piston head defines a series of passages. Identical valve assemblies are positioned in the passages so as to a... | 04/25/1989 |
| 4781218 | Valve assembly for use in a fuel tank of a vehicle A valve assembly for use in a fuel tank of a vehicle which includes a first valve mechanism and a dust preventing member. The valve assembly is secured to the fuel tank and the valve assembly allows selective communication between the inside of the fuel t... | 11/01/1988 |
| 4770205 | Bi-directional snub valve A bi-directional snub valve provides two parallel fluid paths therethrough and means for restricting the fluid flow through each of the parallel paths to one preferred direction. A movable piston is provided with two land portions which selectively are mo... | 09/13/1988 |
| 4760863 | Pressure vacuum valve, more particularly to the storage tanks for volatile liquids A pressure vacuum valve arrangment for the fitting to the vent pipe of a tank for the storage of volatile fuel comprises a first valve to open on increasing pressure of the tank to allow escape of air and vapors from the tank and a second valve adapted to... | 08/02/1988 |
| 4757884 | Hydraulic damper for vehicle suspension with wide range of two-stage damper curves A family of two-stage rebound damping performance curves is provided by rotating a selector plate within the damper piston to a number of selected positions to control orifice selection to a centralized blow off passage to thereby control the rate of oil ... | 07/19/1988 |
| 4750791 | Pressure control unit, dual-circuit brake systems A pressure control unit comprises a housing and a regulating device connected between an inlet and an outlet thereof and actuated by a control force. To accomplish low-priced manufacture, great reliability of function and valve-tightness, it is arranged s... | 06/14/1988 |
| 4744409 | Valve assembly for air treatment apparatus A valve assembly for use with air treatment apparatus is disclosed. The assembly includes shutter valves disposed in the air flow channels and actuatable by the flow of air therethrough.... | 05/17/1988 |
| 4732244 | Hydraulic shock damper assembly for use in vehicles A hydraulic shock damper comprises a hydraulic cylinder and a piston having apertures and dividing the cylinder in upper and lower chambers. Through a flow channel the upper chamber of the cylinder is connected to a dashpot accomodating a partition elemen... | 03/22/1988 |
| 4724937 | Hydraulic damper for vehicles with variable deflected disk piston valving Rebound damping action of this hydraulic damper is set by rotating a selector plate within the shock absorber piston to a number of positions to control orifice selection degree of disk plate pack deflection and the rate of oil flow through the piston dur... | 02/16/1988 |
| 4721130 | Valve structure of hydraulic buffer A valve structure according to the present invention is used for a hydraulic buffer provided with a member for partitioning the interior of a cylinder into two liquid chambers and having a plurality of ports for affording communication between both liquid... | 01/26/1988 |
| 4658856 | Microleaks intercepting apparatus for avoiding and/or signalling oil leakages in hydraulic plants and for equivalent uses A unidirectional valve (7) forms a reduced meatus which extends in the direction of the obturator (23) movement, which meatus is to be passed through by possible microleaks in case of losses in the actuator branch (3); a considerable run of the obturator ... | 04/21/1987 |
| 4646883 | Hydraulic shock absorber A hydraulic shock absorber exhibiting a constant vibration damping force. The shock absorber is provided with a deep groove formed on an upper surface of a piston in a circle where piston ports formed through the piston lie and communicated with the pisto... | 03/03/1987 |
| 4597411 | Restriction valve device for hydraulic pressure fluids in vehicle shock absorbing mechanisms A restriction valve device for hydraulic pressure fluid in a vehicle shock absorbing mechanism comprises a valve seat member with at least one main opening for the passage of said pressure fluid, said main opening being closable by means of a movable spri... | 07/01/1986 |
| 4582084 | Positive flow control valve The positive flow control valve of this invention comprise an interchangeable rotary plug valve member having different outside diameters and a plurality of restrictive orifices leading into a common manifold thereon connecting the inlet bore to the outle... | 04/15/1986 |
| 4529003 | Manifold A manifold is described, for delivery of radioaerosol to a patient, having a pair of rigid conduits joined at one end to form a first connector and at the other end to form a second connector. A third connector is formed in the first conduit between the f... | 07/16/1985 |
| 4508131 | Safety valving for cargo tanks used for bulk transportation of hazardous commodities Safety valving for cargo tanks used for bulk transportation of hazardous commodities, such as for instance flammables. The valving provides automatic differential pressure relief for the tank, and overturn protection, with the automatic differential press... | 04/02/1985 |
| 4471804 | Blade valves for compressors A blade valve for a compressor comprises two discs which are arranged one above the other with the interposition of a seal. The discs are provided with ducts for the controlled medium and form both the valve seat and the catcher. In the seal, whose thickn... | 09/18/1984 |
| 4450861 | Compressed gas saving device Compressed gas saving device designed to be implanted in a pipe system connecting a control valve outlet to the inlet of a pressure-user apparatus constituted by a body in which a first passage is provided which passage starts from a first end of the body... | 05/29/1984 |
| 4440308 | Fuel cap valve structure A fuel cap has a valve structure for controlling both superatmospheric and subatmospheric pressures in a fuel tank. The valve has a plate or flat disc member with two apertures formed therein. A grommet is secured in each aperture. A pair of resilient val... | 04/03/1984 |
| 4416445 | Viscous spring damper A viscous spring damper including inner and outer members connected by an elastomeric shear spring and having a main fluid chamber defined therebetween for communication with a second fluid chamber in the inner member through a restricted orifice. The mem... | 11/22/1983 |
| 4410006 | Damper valve The invention relates to a damper valve for arrangement in a liquid conduit to control flow through the conduit in both directions, and of the kind comprising an apertured port plate with resilient flaps covering the ports so that fluid flow can only take... | 10/18/1983 |
| 4391294 | Dump delay valve A delay valve has a body defining an enclosure, with a separating plate and diaphragm operator therein to define an input, output and third chamber. The input and output chambers are adjacent, and separated by the separating plate. This plate defines an a... | 07/05/1983 |
| 4379470 | Closing cap, particularly for a motor vehicle radiator In the housing of a closing cap 2, a valve seat plate 3 is held in place by means of a resilient ring 8 forming at the same time a seal relative to the tank connection to which the closing cap is screwed by its internal thread 1. The valve seat plate 3 su... | 04/12/1983 |
| 4337873 | Fuel cap with poppet type valves A fuel cap has a pair of poppet type valves which control the pressure level within the fuel tank. Each valve member has a seat portion and a valve stem guide portion formed integral with the threaded closure member of the cap. A conical valve member havi... | 07/06/1982 |
| 4323096 | Combination vacuum relief valve and pressure relief valve which are protected from the atmosphere A vacuum relief valve assembly includes a vacuum valve member located below a top cover plate and is thus protected from the atmosphere. First passageways defined in part by a bottom cover plate provide communication between the outside atmosphere and the... | 04/06/1982 |
| 4310016 | Differential pressure delay valve A differential pressure delay valve for vacuum controlled devices is disclosed. The valve has input, output and third chambers with a controlled flow orifice in a separating plate between the input and third chambers; a diaphragm operator with a controlle... | 01/12/1982 |
| 4303095 | Low-differential pressure delay valve A low-differential pressure delay valve for vacuum controlled devices is disclosed. The valve has input, output and third chambers with the following: a controlled flow orifice in a separating plate between the input and output chambers; a port in the sep... | 12/01/1981 |
| 4286625 | Four-way plug valve A rotary lift-turn type plug valve mechanism includes a valve body and bonnet structure defining a tapered valve chamber that receives a tapered plug member which is operated by linear and rotary components of movement to achieve valve operation. External... | 09/01/1981 |
| 4279271 | Pressure regulator and flow control valve with pre-exhaust A combination pressure regulating and flow control valve having an upstream port and a downstream port interconnected by a flow passage. An adjustable pressure regulating valve is mounted in said flow passage for regulating the downstream pressure in said... | 07/21/1981 |
