Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 5496236 | Physical therapy apparatus A physical therapy apparatus capable of being used with any suitable seating surface includes a tubular frame, a seat coupling device and a means for simultaneously workout the upper and lower body. The seat interfits with the frame and has a flange porti... | 03/05/1996 |
| 5471748 | Cutting guide for the removal of a handgrip from the shaft of a golf club A cutting guide is provided to assist in the removal of a handgrip from the shaft of a golf club. The guide includes a conical, tubular member adapted to receive the handgrip therein. The guide has a lateral opening that extends over the length thereof an... | 12/05/1995 |
| 5438784 | Magazine safety A magazine safety for a semi-automatic pistol with a double-action firing pin striker mechanism having a lever pivotable to the frame of said pistol so that the forward end thereof will sense the presence of the magazine in the pistol. The lever is provid... | 08/08/1995 |
| 5438783 | Butt plate assembly for handgun magazines A magazine for a semiautomatic handgun is provided which includes a butt plate being slidably secured to the bottom thereof by side walls having slots which engage flanges on the lower edge of the magazine tube. A floor plate which serves as a seat for th... | 08/08/1995 |
| 5437118 | Frame plug for semi-automatic handguns A frame plug or closure member which is fitted into a cavity of a handgrip of a handgun is used to provide added reenforcement and to extend the handgrip. The plug has a tapered, semi-circular shaped base which is integrally connected to one end of a flex... | 08/01/1995 |
| 5435411 | Work support stand A dual purpose roll work stand, adapted to support elongated material and permit the user to easily move the material across the stand surface, includes a base member mounted to a vertical support which can be adjusted to raise or lower the height thereof... | 07/25/1995 |
| 5417777 | Alloy for backing steel of a bimetallic band saw blade A bimetallic band saw blade has a high speed cutting edge welded to a backing band of a steel alloy containing the following elements percentages by weight: Cr - 0.5% to no more than 1.5% V - 0.10% to 0.75% Mo - 1.5% to 2.5% wherein said backing band comprises... | 05/23/1995 |
| 5410935 | Band saw blade An improved saw blade includes groups of saw teeth disposed along the cutting edge of the blade. Each group of teeth includes, in relation to the cutting direction of the blade, an unset leading tooth followed by two pairs of trailing teeth alternately se... | 05/02/1995 |
| 5406731 | Handgun of improved ergonomic construction An ergonomic semi-automatic handgun includes a pivotable trigger with a concave face portion disposed in front of the grip portion whereby when the trigger is pivoted, the center of the concave portion will travel in a generally straight line towards the ... | 04/18/1995 |
| 5404667 | Front sight retention means for handguns An improved means is provided for mounting a front sight onto the slide of a semi-automatic pistol. The sight includes an upper portion and an integral anchor portion of a resilient polymeric material in which the upper portion is adapted to disposed on t... | 04/11/1995 |
| 5402593 | Safety trigger for a firearm A two-piece safety trigger for a handgun or pistol fabricated from high impact polymer is provided in which a lower portion comprising approximately the entire lower half of the trigger face is pivotable relative to the upper portion. The lower trigger po... | 04/04/1995 |
| 5401096 | Spring-controlled support arm for a desk top A desk having a desk top that is movable with respect to a storage compartment under application of an external force through an open position, an intermediate position, and a closed position. A support member is provided to support the desk top as it mov... | 03/28/1995 |
| 5392753 | Microprocessor controlled capacitor discharge ignition system Capacitor discharge ignition system having a microprocessor disposed thereon to control the ignition timing of the system. The system has a generator coil, a primary coil and a secondary coil on the same leg portion of a ferromagnetic core. An electronic ... | 02/28/1995 |
| 5392689 | Recoil mechanism for handguns A recoil mechanism used to return the slide of a semi-automatic handgun back to its battery position after firing is provided having a recoil spring, a rod member and a discrete flange member. The rod and the flange member each of polymeric material have ... | 02/28/1995 |
| 5386659 | Fire control mechanism for semiautomatic pistols A fire control mechanism for a firing pin striker operated semiautomatic double action handgun includes a sear pivotably disposed on a frame between forward and rearward positions. The sear includes an edge portion for controlling the firing pin and furth... | 02/07/1995 |
| 5372487 | Inlet check valve for pump mechanism An intake valve for use in a thermoplastic fluid pump for inflatable bladders in which the valve is composed of superposed elastomeric layers and one of which is energy sealed at the center thereof to an inner wall portion of the pump about an inlet openi... | 12/13/1994 |
| 5329711 | Crease fold calendar An accordion-folded calendar sheet printed on a continuous web of paper has sufficient blank spaces adjacent each date thereof to allow the user to record notations and has transverse perforations which separate the calendar paper into consecutive two-wee... | 07/19/1994 |
| 5307019 | Method and apparatus for determining the weld and coil resistances of a motor winding Disclosed is a method and apparatus for determining weld and coil resistances of a commutator type electric motor armature. The method comprises the steps of determining a resistance ratio for a pair of coils and then determining the weld resistance acros... | 04/26/1994 |
| 5286104 | Quick release feeding apparatus for an extruder Disclosed is an apparatus for feeding material from a hopper to an extruder choke. The apparatus comprises a Y-shaped feeder section having an inlet portion and an outlet portion capable of being sealably connected and disconnected to the extruder choke. ... | 02/15/1994 |
| 5277575 | System and method for controlling the operation of a primary burner Disclosed is an electronic control system for controlling the operation of an oil burner heating system. The control system comprises a relay circuit having first and second relays. When the relays are closed, an external power source is connected to an i... | 01/11/1994 |
| 5275666 | Auxiliary apparatus for producing maple syrup An auxiliary apparatus for producing maple syrup from maple sap is adapted to utilize the latent heat of the steam emitted from the flue pan of a maple syrup evaporator which is fitted in sealed relation on top of the flue pan. The auxiliary apparatus is ... | 01/04/1994 |
| 5246317 | Quick-release arbor for hole saws Quick-release arbor for hole saws has a generally cylindrical shaft with a threaded end portion for a screw-fitted connection to the threaded bore of a hole saw. A collar is disposed about the shaft, includes a shank, at one end, adapted for connection to... | 09/21/1993 |
| 5241888 | Slidable compound miter saw A powered compound miter saw that can perform miter and bevel cuts and which is adapted so that the saw blade can be moved to provide a wide cut. In particular, the compound miter saw employs a sliding mechanism that provides consistent cutting performanc... | 09/07/1993 |
| 5230171 | Shoe fastener Shoe fastener for conventional type shoes having flaps with lace-receiving eyelets disposed along the upper edge portions thereof, includes an elastic web secured at one end to an elongated mounting plate. The plate has a plurality of bendable tabs to fit... | 07/27/1993 |
| 5218148 | Square extractor for the removal of cartridge cases from the chambers of a revolver An extractor for the removal of cartridge cases from the chambers of a revolver is mounted adjacent the outer end of a tubular stem. The extractor is in the form of a plate having a plurality of radially extending arms equally spaced apart and defining, b... | 06/08/1993 |
| 5208954 | Machine for the automated fitting of insulative foam inserts into masonry building blocks Machine for the automated fitting of insulative foam inserts into the cores of masonry building blocks includes a frame for straddling, in superposed relation, a masonry block conveyor. The machine has a magazine section for sequentially feeding pairs of ... | 05/11/1993 |
| 5205142 | Hinged handcuffs Disclosed is a handcuff device for restraining the wrists of a detainee. The device comprises a pair of handcuff members and a link member of unitary construction. Each of the handcuff members have one or more integrally formed mounting posts. The link me... | 04/27/1993 |
| 5154552 | Quick-release arbor for hole saws Quick-release arbor for hole saws has a generally cylindrical shaft with a threaded end portion for a screw-fitted connection to the threaded bore of a hole saw. A collar is disposed about the shaft, includes a shank, at one end, adapted for connection to... | 10/13/1992 |
| 5144708 | Check valve for fluid bladders A check valve provides a one-way fluid passage from without to within a fluid bladder formed by a pair of plastic sheets sealed together about their periphery. The check valve is formed by a pair of superimposed films of thermoplastic material, generally ... | 09/08/1992 |
| 5127775 | Fail safe stop for a drill press control device Quality control attachment adapted to be fitted onto a threaded depth control bar of a drill press machine includes a sleeve having an axial opening for fitting onto the control bar and being longitudinally movable relative to the bar. The sleeve carries ... | 07/07/1992 |
| 5118039 | Domestic hot water heating control circuit for furnace control systems Domestic hot water heating control circuit is used in conjunction with a furnace control unit of a hot air furnace system which utilizes a hot water heat exchanger. The hot water control circuit has a diverter valve which is electrically connected to a th... | 06/02/1992 |
| 5086579 | Decocking mechanism for a semi-automatic firearm Improved decocking mechanism for a semi-automatic firearm has a lever pivotable on one side of the frame of the gun. One end of the lever includes an actuator and the opposite end, has a sector gear meshed with the toothed surface of a pawl rotatable on t... | 02/11/1992 |
| 5086962 | Device for breaking open packaged rolls of coins A device for breaking open cylindrically packaged rolls of coins, has a base and an anvil centrally located on the upper surface of the base. The anvil includes a lower portion affixed to the base and an upper portion against which the roll of coins are s... | 02/11/1992 |
| 5074765 | Elastomeric air pump An air pump formed of a resilient elastomeric material bondable about the perimeter of an opening provided in a plastic inflatable bladder, has a self-supporting spherical dome portion and a generally planar base portion. An inlet flapper type valve is in... | 12/24/1991 |
| 5070268 | Rotor of a magnetomotive device Rotor of a magnetomotive device has a discrete permanent magnetic and a ferromagnetic core disposed within an injection molded, synthetic plastic body in the form of a flywheel. The core is of integral, laminar construction and includes hub and counterwei... | 12/03/1991 |
| 5063812 | Pawl assembly for manual starting of small internal combustion engines Improved pawl assembly for starting mechanisms of small engines mounted on the engine flywheel provided with a bore therein and includes an integrally molded, polymeric pawl, a U-shaped torsion spring and retaining means disposed in the bore of the flywhe... | 11/12/1991 |
| 5060555 | Slide decelerator for a firearm Slide decelerator for a firearm has a cylindrical cavity formed in the metallic receiver of the firearm and a deformable mass of elastomeric material is disposed within the cavity. A piston is slidably fitted into the cavity and a rod extends outwardly fr... | 10/29/1991 |
| 5049843 | Strip-line for propagating microwave energy A device for propagating microwave energy to a plasma discharge tube from an antenna coupled to a microwave generator includes a hollow rectangular conduit and a strip-line resonator or strip-line conductor disposed therein. The discharge tube is mounted ... | 09/17/1991 |
| 5024026 | Segmental grinding wheel Segmental grinding wheel for forming the tip of intersecting surfaces on tools includes an array of peripherally extending and circumferentially, spaced segments. Each segment includes first and second grit-coated angularly oriented grinding surfaces. Ano... | 06/18/1991 |
| 5022109 | Inflatable bladder An inflatable bladder is defined by two superimposed outer sheets of heat-sealable synthetic plastic fused together about their peripheral edges. An Intermediate layer or baffle is disposed between the two outer sheets and is alternately sealed to one and... | 06/11/1991 |
