U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 6718554

Hands free towel carrying system

A hands free towel carrying system for coupling a towel to a user to prevent loss, theft or contamination.

Newsletter  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.

 

Patents Published on 07/21/1981


See All Patents Issued In 1981


          11            
NumberTitleIssue Date
4279438Tire loader
A loader for tire machinery such as tire presses is disclosed, which loader is supported from a vertically and horizontally movable frame and which includes a vertical shaft or sleeve journaled with respect to the frame with a horizontal plate secured for...
07/21/1981
4279439Molded liner for pickup trucks
A flexible liner for pickup truck beds formed of a monolithic sheet of rubber or vinyl or the like having suction cups on one side or gripping the surface of the truck bed and foldable flaps for protecting the inner surface of the walls and tailgate. The ...
07/21/1981
4279440Motor vehicle camper
A camper suitable for mounting on a motor vehicle is disclosed and includes a generally rectangular frame which supports first and second living compartments. The frame carries means for releasably and adjustably securing it to the bumpers of the vehicle ...
07/21/1981
4279441Air deflector and pivotable roof vent panel apparatus for vehicle roofs
A pivotable air deflector for a vehicle roof structure is adapted to removably receive a roof vent panel. The air deflector and roof vent panel pivot together as a unit between a closed position wherein the air deflector and roof vent panel are in substan...
07/21/1981
4279442Reclining seat latch
The disclosure relates to a mechanism for controlling reclining movement of a vehicle seat back. A pair of pawls are engageable with an articulated slidable ratchet arm to latch the seat at a desired reclining position. The pawls are manually movable to a...
07/21/1981
4279443Mining apparatus
The present invention is directed to a mining apparatus including a device comprising at least one pair of projectors for determining position of the apparatus in a mine by the intersection of paths from the projectors....
07/21/1981
4279444Jetting out weak areas for forming an in situ oil shale retort
An in situ oil shale retort is formed in a subterranean formation containing oil shale. A void can be formed in formation within the retort site by directing fluid under pressure against a zone of relatively weakened formation, such as tuffs, gravel beds,...
07/21/1981
4279445Longwall mining installation having stable-hole plough
A longwall mineral mining installation has a longwall conveyor, a plough guide attached to the face-side of the conveyor, and a main plough movable to and fro along the guide. A respective stable-hole plough is movable to and fro along portions of the plo...
07/21/1981
4279446Segmented wheel clamp
A wheel rim clamping device is disclosed which has a plurality of pressure applying surfaces for clamping a concentric wheel rim to an axle hub assembly so as not to deform the rim and to improve the load transfer between the rim and hub. The clamping dev...
07/21/1981
4279447Brake oil pressure controlling valve device for vehicle use
Arranged in parallel with a main control valve, which is principally of the conventional structure including a spherical weighted valve element operable under inertial force, is an auxiliary control valve, that includes a differential piston type valve el...
07/21/1981
4279448Brake power control unit for two-circuit brake systems incorporating a locking piston operated hydraulically
Brake power control units for two-circuit brake systems are known in which a control piston and a locking piston are provided. The control piston reduces the brake pressure of the rear axle brake circuit in relation to the brake pressure of the front axle...
07/21/1981
4279449Slide surface compound for track-driven vehicle
A flexible endless belt track for a track-driven vehicle, said belt track having an outer ground-contacting surface to provide traction and an opposite inner surface which is adapted for moving contact with rigid elements of the vehicle drive means and th...
07/21/1981
4279450Rotary rock bit fluid center seal
An improved sealing system for a rotary rock bit retains lubricant inside the bearing area of the bit and acts as a barrier to the pulverized cuttings and other materials in the borehole to prevent the materials from entering the bearing area through the ...
07/21/1981
4279451Device for obtaining axial mobility and avoiding radial play of a bearing ring in relation to a bearing seat
The invention relates to a device for obtaining axial mobility and for avoiding radial play of a bearing ring in relation to a bearing seat. The device comprises an elastically deformable ring with a cylindrical surface and a tapered surface co-operating ...
07/21/1981
4279452Bearing assembly
A bearing assembly for use in fluid pumps having a pump housing through which a pump drive shaft is extended for rotation about an axis of rotation, the bearing assembly including a pair of sleeves dimensioned to be fitted within the pump housing substant...
07/21/1981
4279453Combined chest of drawers and sewing machine table
A sewing machine supporting work table including a pair of front legs is connected to a chest of drawers by parallel links on which the table is movable between alternate positions in an arc carrying the legs over an underlying surface. In one position of...
07/21/1981
4279454Cabinet with foldable sliding doors
A cabinet comprising a cabinet body, a rail continuously laid in the cabinet body, and a glass doors each of which consists of a plurality of glass strips foldably connected together. The glass doors are retracted into or withdrawn from the cabinet body w...
07/21/1981
4279455Drawer assembly
A furniture drawer of knock-down construction. The furniture drawer comprises front, side, rear, and bottom panels. The front panel has vertical, spaced apart, grooves of female dove-tail configuration in the inner face adjacent and parallel to the vertic...
07/21/1981
4279456Electric lines of the armor-plated type, designed especially for electric system for interiors
A bipolar shunting device for multipolar electric lines formed by a box-type contact unit which may be fitted slidingly in substantially U-shaped sections, which support internally two opposite sets of electric insulated wires. A box-type connection unit ...
07/21/1981
4279457Cover plate for electrical connector
An improved electrical connector of the type having spaced-apart plug-in receptacles is disclosed wherein a cover plate is slidably attached to the connector above the spaced-apart receptacles, the cover plate having a single pair of apertures and being o...
07/21/1981
4279458Releasing electrical connector
A releasable electrical connector consisting of a connector plug mating with a corresponding connector receptacle which may be disconnected by a separating force applied to a surrounding operating sleeve and the connectorl receptacle. The operating sleeve...
07/21/1981
4279459Printed wiring board and connector apparatus
A printed wiring board (20) and connector (12) apparatus in which a coordinate array of terminal contact areas (22) on the board (20) make only simultaneous and exclusive electrical contact with a corresponding array of connector contact springs (24). Pre...
07/21/1981
4279460Electrical crimp connector for making a connection between an insulated wire and connecting element
An electrical crimp connector for making a connection between an insulated wire and a connecting element. The connecting element comprises two limbs which define a slot into which the wire can be inserted, the dimensions of the slot being such that the in...
07/21/1981
4279461Wedge connector
The wedge connector includes a longitudinally extending spring member which is generally C-shaped in cross section and which is tapered along its longitudinal length. A correspondingly tapered and longitudinally extending wedge member is insertable into t...
07/21/1981
4279462Method of holographic processing of waves
A new method for holographic processing of waves by means of an optical system is disclosed. The method is based on the generation of an unrecorded hologram, herein denoted virtual hologram, which satisfies optical requirements. The virtual hologram corre...
07/21/1981
4279463Combination sun-moon filter
A combination sun-moon filter employs a first filter that is mounted at the front of the telescope and a second that is mounted in the telescope near the eyepiece. Each filter transmits approximately one percent of the light that strikes it, and both filt...
07/21/1981
4279464Integrated optical wavelength demultiplexer
An integrated optical wavelength demultiplexer has deposited on a waveguide layer a pair of Luneburg lenses, the first for collimating light from an optical fiber, the second for focussing light at an array of photodetectors formed under the waveguide lay...
07/21/1981
4279465Device for transmitting and receiving optical data on the same optical transmission line
An optical device for the simultaneous transmission and reception of optical data on the same optical waveguide. A transmission and receiving means at each end of the fiber optic cable permits simultaneous transmission. Each transmit/receive means compris...
07/21/1981
4279466Hermaphroditic fiber optic connector
A hermaphroditic fiber optic connector for use in an assembly for aligning mating ends of at least one pair of optical fibers is disclosed. The connector includes a terminating member having a passage therein dimensioned for receiving one of the optical f...
07/21/1981
4279467Fiber optic connector
An actuated fiber optic connector is disclosed in which the plug and receptacle connector members are axially mated with the fiber optic ferrule in the plug connector member sliding into a V-shaped channel in the receptacle connector member with low inser...
07/21/1981
4279468Optical fiber connectors
An optical fibre connector comprises two co-operating parts each of which includes a fibre alignment member formed on one plane surface with relatively narrow parallel grooves for receiving the ends of optical fibres and relatively wide grooves accurately...
07/21/1981
4279469Separable fiber optic cable connector
A separable connector is provided for optically joining one or more pairs of fiber optic cable terminals, each of which pairs is supported within a respective rigid alignment sleeve mounted within the connector in a resilient collar so that the alignment ...
07/21/1981
4279470Optical cable elements
A method of manufacturing elements for an optical cable, such elements including a tube of an elastic material, e.g. a synthetic resin or an elastomer, which loosely encloses one or more optical fibers. Preferably, the fiber or fibers are longer than the ...
07/21/1981
4279471Retroreflector for road surfaces
A retroreflective assembly includes a transparent polycarbonate housing of generally trapezoidal cross section. A channel extends upwardly from the base of the trapezoid, and the channel receives a vertically oriented strip of retroreflective sheet materi...
07/21/1981
4279472Laser scanning apparatus with beam position correction
This invention relates to a scanning apparatus in which a spot of light is swept or scanned over a receiving surface (11,27). The intensity of the spot may be modulated during scanning to build up a two-dimensional image on the receiving surface, or alter...
07/21/1981
4279473Remote control mechanism
A remote controlled rearview mirror assembly comprises a mirror bracket controllable by a pivotal control lever through a mechanism including a pair of first arms mounted on the control lever and a pair of second arms supporting the mirror bracket and piv...
07/21/1981
4279474Spectacle lens having continuously variable controlled density and fast response time
A spectacle lens comprises a liquid crystal layer and electrode assembly sandwiched between a pair of identically curved glass plates and layers of polarization material on the outer surfaces of the plates. The optical density of the lens is controlled by...
07/21/1981
4279475Method of control of an electrolytic display cell and a circuit for the application of said method
A method of control for a metal halide electrolytic display cell consists in passing a control current through the cell in a first direction during periods of erasure and in the opposite direction during writing periods, a zero control current being maint...
07/21/1981
4279476Objective lens system for microscopes
A plan achromat objective lens system designed for a magnification level on the order of 40× for use with microscopes comprising a first negative meniscus lens component, a second positive lens component, a third positive cemented doublet and a fourth po...
07/21/1981
4279477Objective lens system for microscopes
An objective lens system for microscopes comprising a front lens group consisting of a first positive meniscus lens component and a second positive cemented doublet component, and a rear lens group consisting of a third lens component having positive refr...
07/21/1981
          11            
 
Sign InRegister
Username  
Password   
forgot password?