Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4772177 | Screw pump This invention relates to a screw pump for feeding mixed concrete and the like, sticky material such as adhesive fluid without bitting and clogging and feeding them continuously and effectively. For preventing the bitting, a bearing is provided at the inl... | 09/20/1988 |
| 4768561 | Process for sealing pipes A process for sealing pipes which comprises feeding a sealant of aerosol type thereinto in the form of foams so as to keep the inside thereof at a pressure of 0.05 kg/cm2 or more, the sealant containing an aqueous resin selected from the group ... | 09/06/1988 |
| 4763944 | Tailgate barriers A tailgate barrier for a light truck comprising a flat membrane of flexible, inelastic material. Apertures are formed through the membrane to pass air therethrough. Stiffeners are incorporated in the membrane at its side edges to maintain the side edge st... | 08/16/1988 |
| 4764400 | Wooden pattern applying method A method of treating a body to produce a wood like appearance. A treating material is created by combining urethane mixtures aged different periods of time, from as little as one day up to five days, respectively. The combined mixture is allowed to flow i... | 08/16/1988 |
| 4762140 | Snap-off plug valve Disclosed is a plug valve for installation in a water supply line which will shut off flow through the line when a downstream emitting element, such as a sprinkler head, is destructively removed from the line. A fracture groove on the exterior of the valv... | 08/09/1988 |
| 4761084 | Bearing system with redundant race A redundant-race bearing system according to this invention incorporates a pair of ring-shaped race members. The race members are coaxial and axially spaced apart from one another. Each race member has a radial cross-section that includes a plurality of t... | 08/02/1988 |
| 4756652 | Threaded nut resistant to removal A security fastener has a threaded body with tool engaging surfaces. It is surrounded by a freely rotatable spinner. When the fastener is tightened down the tool engaging surfaces are removed so there is nothing on the fastener to be engaged by a tool. Th... | 07/12/1988 |
| 4756228 | Repeating weapon actuating spring and guide A repeating weapon in which its bolt carrier is slotted to enable an actuating spring to move laterally, carrying with it a gas piston. The spring is anchored to the receiver in such a way as to be anchored or released by axial movement. This enables a qu... | 07/12/1988 |
| 4753017 | Heat control of steam-heated rollers A system to maintain the BTU output of a rotary drum, in which steam is supplied to the drum, and in which saturated steam and condensate is drained therefrom. An upstream flow meter and a downstream flow meter measure fluid flow, and in view of the small... | 06/28/1988 |
| 4751748 | Shin guards A pair of guards for the knee and shin of the left leg and of the right leg of a user. Each guard has a shell-like knee protector and a shell-like shin protector. The protectors of each guard are joined by a pair of hinge pins whose hinge axes are common,... | 06/21/1988 |
| 4750221 | Linkage tiltable around a plurality of axes by a single push rod A push button linkage in which a lever is tiltably actuable around a plurality of selectible axes as the consequence of an axial push on a single push rod. It finds its principal application as an actuator for a flush valve in a tank type commode or urina... | 06/14/1988 |
| 4747300 | Sensing pump with improved discrimination between liquids and gases A sensing pump for discriminating between liquids and gases. The pump includes a plunger which is reciprocably moved by a succession of repetitive actuation of known force and time characteristics. The response of the plunger, acting against the fluid is ... | 05/31/1988 |
| 4746218 | Gas detectors and gas analyzers utilizing spectral absorption Instrumentation to detect the presence of, or to measure the concentration of, a gas or pollutant in a gaseous environment. With the use of gas filter correlation techniques and energy beams having suitable wavelengths, the presence and concentrations of ... | 05/24/1988 |
| 4744387 | Fluid pressure regulator A fluid pressure regulator having a flow path from inlet port to outlet port. Reduction of particulates which might be generated by the regulator itself are minimized by the absence of springs, freely moving parts, and rubbing contacts in the flow path, a... | 05/17/1988 |
| 4730639 | Tank valve with shutter type diverter A two function tank valve according to this invention includes a vertically oriented supply tube or conduit with an upper opening. A valve seat surrounds the opening, and a valve seal is movable against it and away from it. Water level responsive means de... | 03/15/1988 |
| 4724312 | Proximity detection and warning system having a light pulse sensor and circuit responsive only to particular select frequencies A proximity detecting and warning system for use in collision avoidance, particularly with aircraft. The system responds to pulsed light sources within a selected frequency band and particularly the frequency of aircraft strobe and rotating beacon light s... | 02/09/1988 |
| 4714286 | Auxiliary locking mechanism for a case An auxiliary locking mechanism for a bag or a case especially an attache case, a cupboard etc. having a rigid body and lid for opening and closing the body. The auxiliary locking mechanism provided restricts or limits the opening of the lid at a position ... | 12/22/1987 |
| 4713960 | Method for forming a countersink in a plate A method of forming a countersink around a hole in a metal plate. A stepped punch is pressed, stem first into the hole, with such a force and at such a rate as to cause deformation but not shearing of the metal, there being an annular ring of unrestrained... | 12/22/1987 |
| 4711249 | Circumferential membrane, fluid coupled catheter A medical catheter comprising a tube having an internal lumen with an internal wall in which a rigid insert is fitted between lengths of the tube. The rigid insert is overlapped by the ends of the lengths of the tube and the lengths are spaced apart. The ... | 12/08/1987 |
| 4706675 | Support garment for energetic activities The invention is a garment to support and to clothe portions of the body during energetic activities such as motorcross riding. The support function is commonly referred to as a kidney belt that includes a riding brace element and a pair of flexible strap... | 11/17/1987 |
| 4706331 | Security hinges and junction boxes for lamp housings The invention relates to a hinge for pivotally mounting flood lamps. The hinge includes a first and second knuckle. The first knuckle has an internally threaded socket. The second knuckle includes a first part and a second part, and the parts are interloc... | 11/17/1987 |
| 4691669 | Engine overheat protection system A protection system for internal combustion systems which indicates and alarms the loss of coolant liquid which it detects as a pressure drop at higher temperatures, and then sets off an alarm.... | 09/08/1987 |
| 4689757 | Machine event processing system A system for reading, recording and transferring one or more discrete machine events to computer processing equipment for accounting and tabulation. The system is comprised of a discrete machine event counting module which records and stores a count of ma... | 08/25/1987 |
| 4688720 | Nozzle for an architectural fountain A nozzle for an architectural fountain which has fixed deflector surfaces that produce a plume divided into well-aerated drops of substantial size.... | 08/25/1987 |
| 4681541 | Dental bur with enhanced durability A dental bur whose abrading or cutting surfaces are covered by an adherent layer of a suitable nitride or carbide deposited thereon. The layer is deposited on edge surfaces and adjacent surfaces by vacuum deposition, are deposition, are catheter sputterin... | 07/21/1987 |
| 4679840 | Seat for a truck bed A removable seat for a truck bed. The seat has front and back lateral runners, the front runner being the higher. The runners are telescopic in construction. Four attachments, two for each runner, are attached to the truck bed, and the runners are held to... | 07/14/1987 |
| 4678736 | Optical recording media on which information is stored and method of making same Optical recording media for storing information on which bits are formed by applying radiant energy to a polydiacetylene thin film supported by a substrate, so that the main chain structure of the polydiacetylene is transformed into another form or forms.... | 07/07/1987 |
| 4677977 | Mask for pressure breathing A face mask for pressure breathing. The mask has a body with a sealing boundary shaped to fit over the bridge of a wearer's nose, downward past the sides of his nose and mouth and across his mental protuberance. The sealing boundary includes a reflective ... | 07/07/1987 |
| 4671715 | Lesser shock separation fastener A shear type separation fastener having a punch piston which shears a ring of material from the head of a bolt to face the shank of the bolt. The punch piston has a face with a shearing edge that presents an advancing point of contact with the bolt head t... | 06/09/1987 |
| 4671877 | Dewatering apparatus Dewatering apparatus having a screen with alternate perforate sections and inperforate accelerator sections, both on a slope. The input feed may be pulsed the better to resist any tendency for the screen to blind.... | 06/09/1987 |
| 4671355 | Wash tool for stimulating oil wells A wash tool for stimulating oil wells having brushes and/or blades mounted to retractable tool blocks, whereby the brushes or blades can be introduced in the well out of contact with the well liner, and thereafter extended into contact with the liner.... | 06/09/1987 |
| 4668583 | Refractory coating A carbide coating for a surface intended to be subjected to stringencies of temperature and erosion, such as rocket nozzles, turbine blades, heat shields, and hypersonic structures, formed on a carbon substrate from a halide of hafnium, silicon, tantalum ... | 05/26/1987 |
| 4656999 | Contact endoscope The invention relates to a contact endoscope for medical purposes, whose front lens or distal cover plate for the objective is brought into contact with the place to be observed. The invention enables a sample to be taken from the observed place even duri... | 04/14/1987 |
| 4651422 | Line guard for a line cutting type weed trimmer A guard for a grass and weed trimmer of the line-cutting type, the guard having a body attached to a handle. A rotatable head mounted to said handle flailing the line in a plane of rotation around an axis of rotation. The body has a skirt extending partwa... | 03/24/1987 |
| 4652845 | Magnetic holding device A magnetic holding device to be mounted to a magnetizable surface. It includes a body and a magnet having a pair of poles. A first and a second pole piece are mounted to the body adjacent to the magnet, each forming a continuation of a respective one of t... | 03/24/1987 |
| 4649795 | Structural shroud system incorporating a pyrotechnic A shroud to protect airborne stores from excessive temperatures generated by aerodynamic friction. The shroud includes a structural member which acts as a cover that comprises a matrix and a pyrotechnic. The autoignition temperature is above that of the t... | 03/17/1987 |
| 4650049 | Cycle hub convertible between coaster brake and freewheeling operation A cycle hub is shown which can be converted between coaster brake and freewheeling operation without removal from the cycle. A unidirectional clutch is interposed between a hub sprocket and a coaster brake drive, coupling them for forward driving. It can ... | 03/17/1987 |
| 4648697 | Adapter for tripods An adaptor for tripods which can be used for close up photography, low angle photography, and for supporting cameras or lights. The adaptor has first and second sliders movably clamped on a leg of a tripod. A handle is pivotably mounted to the first slide... | 03/10/1987 |
| 4641634 | One-hand hysteroscope The invention relates to a one-hand hysteroscope with a hysteroscope adapter for fixing by vacuum to the portio, in which the hysteroscope shaft and the viewing tube relative to the adapter can be advanced into the body cavity of the patient during hyster... | 02/10/1987 |
| 4642147 | High energy composition High energy composition which is meant for propellants, pyrotechnical and technical compositions, explosives or corresponding items, and production method.... | 02/10/1987 |
