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| Number | Title | Issue Date |
| 5036944 | Method and apparatus for acoustic levitation An acoustic levitator includes a pair of opposed sound sources which have interfering sound waves producing acoustic energy wells in which an object may be levitated. The phase of one sound source may be changed relative to the other in order to move the ... | 08/06/1991 |
| 5004403 | Pressure responsive drivers for reciprocating pump and method A pressure responsive driver couples a reciprocating motor output to a reciprocable piston of a double-acting pump. In one embodiment, the driver comprises a single spring and in another a pair of springs, which transfer reciprocation forces of the motor ... | 04/02/1991 |
| 5000108 | Wishbone-boom front piece for fastening a wishbone boom to the mast of a surfboard A device for attaching the boom to different diameter masts includes a lever attached to a locking pin, which is received in a number of slots to enable circumferential adjustment.... | 03/19/1991 |
| 5001003 | Laminated sailcloth with scrim A laminated sail cloth includes a central layer of spaced intersecting scrim yarns which intersect at acute angles in such a matter to reinforce the fabric along the fill and bias directions of the fabric.... | 03/19/1991 |
| 4997372 | Magnetic dental retention appliance A magnetic dental retention appliance comprises a magnet containing subunit to be embedded in a denture, a magnetizable keeper subunit to be secured within the jaw structure of the patient for retaining the denture in the mouth, and a transmucosal insert ... | 03/05/1991 |
| 4997457 | Colored flame solid fuel and method A solid gelled fuel for producing a visible flame of various colors, which contains methyl alcohol as a primary ingredient in a solid gel with the addition of dibenzylidene sorbitol, cellulose ester and ethylene glycol, with a flame coloring compound bein... | 03/05/1991 |
| 4991851 | Reflective golf ball and method A regulation golf ball is provided with a solid coating of reflective glass beads. The ball is used for night play with the use of a light source, which is aimed in the direction of flight of the ball, and the light source is used to find the ball.... | 02/12/1991 |
| 4989294 | Floor cleaning tool for vacuum cleaner A plastic floor cleaning tool for a vacuum cleaner is characterized by two injection molded plastic pieces that are joined to form an integral structure. By using two plastic pieces to form the floor tool, each may be injection molded to a configuration s... | 02/05/1991 |
| 4986805 | Firefighter's portable water reservoir and method of making the same A portable water reservoir to be worn by a firefighter to provide a supply of water for use in extinguishing fires, e.g., the remnants of a forest or brushland fire, comprises a garment like body formed of an inner ply of flexible sheet material having a ... | 01/22/1991 |
| 4980564 | Radiation barrier fabric A composite for blocking electromagnetic radiation includes a central layer of wire reinforced glass fabric, an outer exposure coating of materials which absorb the radiation, and an inner layer of metal.... | 12/25/1990 |
| 4966555 | Electrostatic assist rotogravure printing safety contact A rotary safety contact featuring dual brush contacts, contained within an isolating housing, shielded from the environment, purged with compressed air to prevent the entry of potentially explosive vapors, and adapted to be connected to a conductive cylin... | 10/30/1990 |
| 4963397 | Paper coating system and method A paper coating system is characterized by an upstream dip roll applicator that applies an excess layer of liquid coating material onto a surface of a paper web, and an improved downstream doctor assembly for metering and leveling the coating on the web. ... | 10/16/1990 |
| 4961983 | Printable paper substitute based on spunbonded polypropylene fabrics A printable paper substitute is composed of a laminated sheet having a central layer of nonwoven spunbonded polypropylene and outer layers of pigmented polypropylene. The outer layers are capable of delamination to provide evidence of tempering.... | 10/09/1990 |
| 4953403 | Positive displacement flushable flow meter A positive displacement flushable flow meter has sensing elements that are rotated by and at a rate in accordance with a flow of fluid through the flow meter. The flow meter is particularly adapted for measuring the volume flow rate of coating material su... | 09/04/1990 |
| 4947781 | Attachment for improving the ride of small marine pleasure craft Small marine pleasure craft, such as jet skis, which have a tendency to "porpoise" or pitch fore and aft at cruising speeds, are provided at the aft end of the hull thereof with a ride plate and , pursuant to the invention, with a downwardly and rearwardl... | 08/14/1990 |
| 4942946 | Bottom rod safety guard for railway brake rigging A bottom rod safety guard in the form of a loop is suspended from a brake beam. The cable ends are looped through holes in the beam, and a latch plate extends beneath the beam to provide a releaseable connection.... | 07/24/1990 |
| 4934924 | Liquid fuel burner A liquid fuel burner is disclosed, comprising a cup-shaped housing having a fuel inlet; a plate enclosing the top of the housing, the plate having fuel passages therethrough; a wick on the outer surface of the plate communicating with the fuel passages; a... | 06/19/1990 |
| 4932589 | Method of and apparatus for electrical isolation of electrostatic sprayers Apparatus for coupling a grounded color changer and associated supplies of conductive paint to an electrostatic paint sprayer isolates the color changer and paint supplies from a high voltage at the sprayer. The apparatus has at least one reservoir into w... | 06/12/1990 |
| 4928439 | Lens edging machine and method A machine for grinding the peripheries of ophthalmic lenses to predetermined outlines is characterized by a head having a rotatable workholder for moving an edge of a lens against a rough grinding or finishing wheel and a pattern holder positioned vertica... | 05/29/1990 |
| 4927079 | Plural component air spray gun and method A plural component air spray gun is characterized by a spray head assembly that has a pair of hemispherically shaped fluid outlet orifices, the straight sides of which are facing, parallel and separated by a relatively thin wall. Each orifice receives a r... | 05/22/1990 |
| 4921149 | Ice portion control for ice dispenser and method An ice portion control for an ice dispenser is characterized by a chute having an upper end for receiving ice and a lower end. With the chute filled with ice, to vend a desired quantity of ice a dispensing gate at the lower end of the chute is opened for ... | 05/01/1990 |
| 4918727 | Double talk detector for echo canceller and method A double talk detector for echo cancellers monitors the ratio of four wire transmit in energy to transmit out energy (ERLE), along with the change and direction of change of an estimated impulse response, to control updating of the estimated inpulse respo... | 04/17/1990 |
| 4909047 | Beverage dispensing system A beverage dispensing system has a plurality of dispensing faucets, each of which is supplied with carbonated water (soda) and a selected flavor of syrup. The syrups and soda are chilled upstream of the faucets, and after chilling the soda is introduced i... | 03/20/1990 |
| 4908996 | Method for machine polishing ophthalmic lenses to a translucent finish A method and apparatus is provided for machine polishing plastic ophthalmic lenses to a translucent finish using a polishing wheel with 7 micron or less sized diamond particles held in a binder, such as a resin or bronze. The polishing wheels of the prese... | 03/20/1990 |
| 4900881 | Safety interlock for floor maintenance machine and method A floor maintenance machine has a base, an electric motor on the base for moving a floor treating element and a handle connected to the base. Carried by the handle are an electric switch for connecting electric power to the motor, a pair of manually movab... | 02/13/1990 |
| 4898761 | Barrier fabric and method A barrier fabric is provided which is impermeable to liquids and permeable to vapor. A polymer film is laminated to a porous fibrous web. The composite web is then needled repeatedly with fine conical needles to provide micropores through the film.... | 02/06/1990 |
| 4896446 | Buttplate and comb assembly for shoulder firearms An adjustable comb and buttplate assembly for shoulder firearms, such as shotguns, having a stock and a recoil reducing or absorbing means at the butt end of the stock, comprises a buttplate slidably and removably mounted at the rear of the stock in engag... | 01/30/1990 |
| 4876428 | Tray or pan for baking batter-based food products in microwave ovens Batter-based baked goods, such as brownies, are produced by subjecting a microwave-transparent pan containing unbaked and non-frozen batter to microwave energy in a microwave oven. The oven has a klystron transmitting energy at a frequency having a wave l... | 10/24/1989 |
| 4871176 | Gaming method and apparatus A gaming apparatus for use with prerecorded media or material, such as audio or video tape, to be selectively played through a conventional player/recorder, such as an audio or video tape player, is disclosed. The play of the prerecorded material in the c... | 10/03/1989 |
| 4870784 | Lens edging machine and method A machine for grinding the peripheries of ophthalmic lenses to predetermined outlines is characterized by a head having a rotatable workholder for moving an edge of a lens against a rough grinding or finishing wheel and a pattern holder positioned vertica... | 10/03/1989 |
| 4865171 | Brake bleeder valve A brake bleeder valve which is adapted to be temporairily and releasably connected to a standard brake bleeder screw and/or to a threaded outlet opening in a master cylinder for quickly bleeding a wheel cylinder or caliper and/or the master cylinder is di... | 09/12/1989 |
| 4864272 | Joystick controller A joystick controller for generating analog signals representative of coordinate positions is characterized by a pair of members movable in orthogonal directions by a handle. Each member carries at least one wiper contact adapted to slide linearly along a... | 09/05/1989 |
| 4859507 | High speed paper coaters A coater for applying liquid coating material onto a paper web carried across an upstream dip roll applicator that applies an excess layer of coating onto the surface of the web, is cahracterized by an improved downstream doctor assembly for metering and ... | 08/22/1989 |
| 4856682 | Hopper and agitator assembly for an ice dispenser A hopper and agitator assembly for an ice dispenser is characterized by an ice storage hopper having at least two ice dispensing openings and dual rotary agitators in the hopper for urging ice bodies through the openings during dispensing operations. The ... | 08/15/1989 |
| 4846374 | Tamper resistant end closure for containers A tamper resistant end closure for a container includes a base for closing an end of the container and a rotor pivotally connected to the base by a hub in the form of a hollow stem extended through a center opening in the base. An annular flange at the lo... | 07/11/1989 |
| 4845759 | Sound source having a plurality of drivers operating from a virtual point A sound source includes a plurality of drivers communicating with the common throat of a horn. The size of the radiating area of the throat is less than two or three wavelengths of the highest frequency to be produced such that the drivers operate conjoin... | 07/04/1989 |
| 4841495 | Horn loaded transducer for acoustic levitation A sound source coupled to an acoustic levitation chamber is provided with horn loading to improve efficiency and to protect the sound source from heat. A dish sound source may be used, and the horn may include a half wavelength pathway from the rear of th... | 06/20/1989 |
| 4815124 | DX circuit An improved DX circuit may be connected to signaling and reference leads of a DX signaling link, without need to balance the internal impedance of the DX circuit against that of the external DX signaling link. The DX circuit senses the magnitude and direc... | 03/21/1989 |
| 4807398 | Lens edging machine A machine for grinding the peripheries of ophthalmic lenses to predetermined outlines is characterized by a head having a rotatable workholder for moving an edge of a lens against a rough grinding or finishing wheel and a pattern holder positioned vertica... | 02/28/1989 |
| 4806183 | Method of and apparatus for controlling application of glue to defined areas Apparatus for applying adhesive onto flutes of single facers of corrugated media, so that the single facers may be adhered together and to a facing to form a composite web, comprises a plurality of adhesive applicator rolls, each for applying adhesive to ... | 02/21/1989 |
