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| Number | Title | Issue Date |
| 4280517 | Brush attachment to hair dresser An attachment including a plurality of brushes to hair dressers for performing curling treatment with respect to hairs wound around the attachment with hot or cool air stream blown from a dresser body. The attachment comprises a substantially hollow cylin... | 07/28/1981 |
| 4280518 | Tooth cleaning implement An implement to facilitate the cleaning of teeth which takes the form of an elongated member which has at one end thereof tautly stretched thereacross a strand of dental floss. The opposite end of the elongated member is attached to a brush-like member wh... | 07/28/1981 |
| 4280519 | Environmental manicure system A manicure table providing for the automatic removal of harmful and/or offensive fumes, dust and other materials of like nature resulting from the manicuring process. Where necessary, the harmful materials may be treated so as to render them more easily r... | 07/28/1981 |
| 4280520 | Warewashing machine splashover return system A liquid collection pan in the wash compartment below the opening thereinto from the prewash compartment has a shielded slot directed toward the opening which captures and returns liquid entering the wash compartment from the prewash compartment.... | 07/28/1981 |
| 4280521 | Hub assembly for collapsible structures A collapsible structural assembly is provided with a plurality of inner and outer hubs pivotally and collapsibly joining the ends of tubular elements making up the structural assembly. Each hub assembly includes a pair of joined hub bodies holding a retai... | 07/28/1981 |
| 4280522 | Fire seal for valves A ball valve is disclosed having two seat rings on each side of the closure member. Each seat ring is operative independently of the other and each ring is sealed with respect to both the ball and with respect to the body independently of the other seat r... | 07/28/1981 |
| 4280523 | Thermal responsive coupling An improved coupling is utilized to interconnect conduits which conduct a flammable fluid, such as LP gas. The coupling includes a plug assembly which is telescopically received in a socket assembly. The socket assembly has retaining elements or balls whi... | 07/28/1981 |
| 4280524 | Apparatus and method for closing a failed open fluid pressure actuated relief valve A fluid pressure actuated by-pass and relief valve are utilized in a fluid pressure actuated downhole drilling apparatus. The valve is normally closed such that fluid under pressure is directed between a rotor and a stator to rotate a drill bit. When the ... | 07/28/1981 |
| 4280525 | Tamperproof cap assembly for hydrant A tamperproof cap assembly for a hydrant having a valve stem rod which in one embodiment is displaceable in elevation within the hydrant housing without rotation of the valve stem rod about its axis. The assembly includes a cap adapted to cover the outlet... | 07/28/1981 |
| 4280526 | Lockable end plug for valve housings A valve, such as a ball valve of known configuration, is provided with an elongated housing which has an open end the internal diameter of which is sufficiently large to permit the insertion of a ball valve member into the housing during assembly of the v... | 07/28/1981 |
| 4280527 | Fluid control valve and support assembly A solenoid actuated water control valve incorporates a molded plastic valve body which includes an inlet portion defining an inlet chamber and having a plurality of parallel spaced holes for receiving a set of screws. A drawn sheet metal tubular fitting h... | 07/28/1981 |
| 4280528 | Waste water conveyance apparatus An arrangement for conveyance of waste water or liquid by vacuum operation, including a vertically movable container in which the waste water is collected. By causing the weight of the liquid to surmount a spring force and a force originating from the vac... | 07/28/1981 |
| 4280529 | Vented fuel tank cap A fuel tank cap for a motor vehicle includes a venting passage normally closed by a spring-biased valve adapted to vent the tank where the pressure in the tank exceeds the atmospheric pressure by more than a first given differential. The valve body is bor... | 07/28/1981 |
| 4280530 | Water-flow-control device A water-flow-control device adapted to be positioned within water systems which are generally used for watering lawns and gardens, as well as for distributing water over larger areas of land such as for agricultural use, whereby the device permits a prede... | 07/28/1981 |
| 4280531 | Method and apparatus for hydraulically controlling subsea well equipment Method and apparatus for hydraulically controlling subsea well equipment, such as valve operators, connectors, and other hydraulically actuated devices, with a significantly reduced number of hydraulic pressure source lines from the surface to the subsea ... | 07/28/1981 |
| 4280532 | Control unit and method of making the same A control unit having a plurality of pneumatically operated valve constructions for controlling the fluid flow from a first fluid source in relation to the condition of a second fluid source that is adapted to be inter-connected to the pneumatically opera... | 07/28/1981 |
| 4280533 | Low pressure, low cost accumulator The present invention is directed to a dependable, low cost, low pressure accumulator characterized by the provision of a bladder support subassembly secured to an end cap member by an annular weld line, the connection between the noted components being e... | 07/28/1981 |
| 4280534 | Plastics pipes having walls with lengthwise extending channels Plastics pipes comprising an inner and outer wall being interconnected by lengthwise extending connecting partitions, forming channels, the ends of the channels being each separately sealed by sealingly pressing the end walls of a channel to each other af... | 07/28/1981 |
| 4280535 | Inner tube assembly for dual conduit drill pipe In a dual conduit drill pipe section having concentric inner and outer tubes, a plurality of centering lugs are provided which are disposed between the inner and outer tubes and include bearing surfaces which are adapted to reduce the friction and wear as... | 07/28/1981 |
| 4280536 | Connecting device for insulated duct work A connector is used to join sheets of fibrous insulation into a duct. The connector includes a base plate to which a plurality of guide flanges and penetrating flanges are connected. The penetrating flanges are spaced from and parallel to the guide flange... | 07/28/1981 |
| 4280537 | Apparatus for gripping a running weft thread on travelling-wave looms The present invention relates to an apparatus for gripping a weft thread. This apparatus comprises an element for braking a weft thread, representing a tire placed on the periphery of a disk and a gripping block partially embracing the tire, the latter be... | 07/28/1981 |
| 4280538 | Insulation packaging machine A machine and method of packaging loose fill material such as fiber insulation into a rectilinear bag is described consisting of a storage tank above a trough enclosing twin counter rotating augers which forcibly drive the loose fill material into a passa... | 07/28/1981 |
| 4280539 | Tree processing apparatus A boom structure (12) for a tree processing apparatus (10) comprising a first upper channel member (18) oriented with its legs extending downward, a second lower channel member (20) oriented with its legs extending upward, and third and fourth channel mem... | 07/28/1981 |
| 4280540 | Log splitter A log splitter comprising in combination a support, a wedge mounted to the support for vertical movement relative thereto, a hammer bar supported in vertical alignment with the wedge for reciprocal movement relative thereto on the one hand to be raised aw... | 07/28/1981 |
| 4280541 | Debarking tool for log debarking machines A debarking tool for a rotor type debarking machine is provided with an arcuate body having a substantially sharp log engaging climbing edge portion so arranged thereon and positioned closely adjacent a cutter member on the adjacent free end of the arcuat... | 07/28/1981 |
| 4280542 | Cutterhead for a portable power planer The invention is directed to a cutterhead for a portable power planer. The cutterhead includes a cylindrical body having a substantially cylindrical surface and defining a rotational axis about which the cylindrical body rotates during normal operation of... | 07/28/1981 |
| 4280543 | Pneumatic tires A tire having a tread with improved wet grip characteristics. The tread is made from a composition which has specific loss factor values measured in high and low frequency ranges defined herein.... | 07/28/1981 |
| 4280544 | Tire traction device A traction device surrounding the tread and sidewalls of a tire. The device includes several elongated, molded plastic traction members having fastening strips secured to opposite ends. The traction members are secured about the periphery of the tire by a... | 07/28/1981 |
| 4280545 | Wire rope traction device for tires A wire rope traction device for tires, and particularly radial tires, includes lateral cables and a plurality of cross cables for extending between the lateral cables across the sole of a tire. Flat metal members secured to the lateral cables and ends of ... | 07/28/1981 |
| 4280546 | Multi-annular chamber, tubeless safety tire An inflated wheel tire for a vehicle, and which is divided by several partitions into a plurality of circular chambers so that in case one of them becomes punctured and deflated, then the others will continue to remain inflated so to allow the vehicle to ... | 07/28/1981 |
| 4280547 | Tire having a folded fabric reinforcement member and a method of building same A folded fabric reinforcement member provides a plurality of reinforcing layers equivalent to at least one ply and at least one breaker of a conventional bias tire or at least one ply and at least one belt of a conventional radial or bias-belted tire. The... | 07/28/1981 |
| 4280548 | Furniture such as chairs and couches A support for furniture, such as outdoor furniture, has a support frame and stretched thereon is a net or lattice-like arrangement of flat web strips of plastics material; where they cross one another the strips are bonded together by means of thin planar... | 07/28/1981 |
| 4280549 | Apparatus and process for die-casting Apparatus and method for producing a die cast article, such as a gear wheel having helical teeth, in which the die cavity is defined by fixed elements and a rotatable element. On completion of the casting the cast article can be ejected from the casting c... | 07/28/1981 |
| 4280550 | Electroslag remelting furnace with improved power connection An electroslag remelting furnace with a power connection at the base and a coaxial conductor to eliminate the deleterious effects of magnetic fields upon the pool of molten metal. The furnace may have a vertically moveable crucible, and also a top support... | 07/28/1981 |
| 4280551 | Centrifugal casting apparatus for dentistry A centrifugal casting apparatus for dentistry comprises a rotating member or platform for the mold having a mold disposed on one side thereof, a rotating member for the crucible movably positioned at the center of revolution of the said rotating member fo... | 07/28/1981 |
| 4280552 | Driving roll stand for a continuous casting plant A driving roll stand to be used in a continuous casting plant includes a lower roll and an upper roll arranged one above the other. At least one of the rollers is drivable by a rotary drive. The lower roll is mounted at a support supported on a base, and ... | 07/28/1981 |
| 4280553 | System and process for storing energy There is disclosed a process for storing energy by use of the heat of fusion of hydrated salts which are within a bulk container having heat exchange means. The process prevents stratification and supercooling from occurring during the heat releasing cycl... | 07/28/1981 |
| 4280554 | Heat tube A heat pipe heat exchanger in which heat is transferred from hot fluid in duct 12 to cold fluid in duct 14 by a continuous cycle of evaporation and condensation of a liquid contained in heat pipe 26. Should the heat pipe not function properly, the transfe... | 07/28/1981 |
| 4280555 | Heat exchanger for exhaust outlet of a room heating unit The specification discloses a heat exchanger adapted to be coupled between the exhaust outlet of a room heating unit and a chimney for extracting heat from the exhaust gases flowing therethrough and returning the same to the room. The heat exchanger inclu... | 07/28/1981 |
| 4280556 | Heat exchanger-tank assembly for hot water heating system A heat exchanger-tank assembly is shown for use in a solar hot water heating system. Heat exchanger tubing extends between inlet and outlet manifolds defining downwardly sloping paths wherein the heat transfer medium may circulate. The heat exchanger is c... | 07/28/1981 |
