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| Number | Title | Issue Date |
| 6425410 | High impact type gate pressure release valve An inline high pressure fluid release valve is formed by a valve body having a transverse opening forming a fluid passageway interposed in a fluid conductor. A vertically moveable plunger in the valve body includes a disc normally closing the fluid passag... | 07/30/2002 |
| 6341616 | Fire protection fluid relief valve A fluid pressure and heat sensitive valve connected with a flow line includes a collapsible pin, normally maintaining the valve closed, which collapses to open the valve in response to fluid pressure above a predetermined limit and includes a fusible plug... | 01/29/2002 |
| 6321768 | Fluid flow shutdown and pressure relief valve with a fusable element A fluid pressure and heat sensitive flow control valve interposed in a flow line includes a collapsible pin, normally maintaining the valve open, which collapses to close the valve in response to fluid pressure above a predetermined limit and includes a f... | 11/27/2001 |
| 6315299 | Apparatus and method of forming a tension resistant O-ring A method of forming a tension resistant O-ring is formed by extruding a length of precured elastomer with a coextensive central aperture; longitudinally dividing the elastomer; winding a strand of nonelastic synthetic material to form an endless ring havi... | 11/13/2001 |
| 6296052 | Compressor lift system for gas well produced liquids An axial assembly of pistons is axially disposed in the depending end of tubing in a gas well and packer set above the formation. Gas and fluid from the production zone enters the casing through an orifice below the piston assembly. Fluid in the annulus b... | 10/02/2001 |
| 6283462 | Helical spring tension adjuster A helical spring end retainer and tension adjuster is formed by a centrally apertured relatively thin wall shallow cup-like member having a hexagonal nut axially secured in the aperture for threaded engagement with a spring surrounded rod.... | 09/04/2001 |
| 6276389 | Toxic fluid safe relief valve A toxic material pressure relief valve is formed by a valve body having a lateral bore and an inline bore forming a fluid passageway intersected by a valve seat in axial alignment with the lateral bore. A bonnet closes the lateral bore and slidably suppor... | 08/21/2001 |
| 6217192 | Decorative light string support A decorative trim light supporting apparatus is formed by an elongated resilient strip having a series of longitudinally spaced apertures therethrough. Strip fasteners projecting through selected apertures removably anchor the strip to a surface. Friction... | 04/17/2001 |
| 6209233 | Safeway deep utility ditch cleaning machine A ditch cleaning apparatus is formed by a prime mover driving a chassis having endless metal belts for moving along the bottom of a vertical wall ditch and supporting an upright frame having a rearwardly and upwardly inclined elevator depositing debris on... | 04/03/2001 |
| 6206347 | Juvenile security fence A juvenile security fence system enclosing an area is formed by a plurality of line, terminal end and corner posts with each post being characterized by a vertical base section having its depending end portion embedded in the earth and having a portion of... | 03/27/2001 |
| 6189563 | Electronic pressure control pilot operated relief valve A pilot operated pressure relief valve is formed by a valve body having an inlet and outlet port forming a passageway therebetween. A centrally bored valve is slideably supported by the body for movement toward and away from the valve inlet. The valve bod... | 02/20/2001 |
| 6173660 | Bench folding leg and brace structure A retrofit kit formed by pairs of telescoping legs and a tool anchoring platform for a collapsible leg structure for a metal bench including a T-shaped brace rod having one end of its stem pivotally connected to the underside of the bench and its other en... | 01/16/2001 |
| 6161318 | Drive-by restaurant order stand with illuminated rotating menu A drive-by restaurant illuminated rotating menu order stand is formed by an upright housing having a translucent part-circular wall end portion and is mounted on a support by an opposite bifurcated end wall. A menu supporting cylinder axially mounted upri... | 12/19/2000 |
| 6135134 | Excess flow volume control valve A shutoff valve assembly interposed in a fluid line for monitoring fluid flow volume and closing a fluid conductor, in the event of fluid flow volume above a predetermined value. The valve assembly contains a valve seat and a normally open piston valve fo... | 10/24/2000 |
| 6113166 | Sanitary pickup apparatus for animal feces A mechanical apparatus for sequentially loading multiple quantities of articles or animal droppings from the surface of the earth into a disposable bag or receptacle is formed by an upright open frame assembly vertically supporting a telescoping handle me... | 09/05/2000 |
| 6109856 | Hay bale carrier A two part hay bale carrier of simplified economical construction is formed by a wheel unit and a handle member. The wheel unit comprises a pair of wheels journaled by respective ends of an axle which rigidly supports normally upright tines intermediate i... | 08/29/2000 |
| 6095183 | Safety relief valve A spring urged pressure relief valve, having a seat and a valve moved toward and away from the seat, is provided with a valve stem surrounding bushing forming a bushing chamber in combination with a disk on the valve stem. The bushing is provided with an ... | 08/01/2000 |
| 6031167 | Cushion for plucked string instrument An L-shaped cushion for use with a stringed instrument having a concave lower surface in a body portion when the instrument is in playing position, is formed by a base pad containing a concavo-convex member overlying resilient foam material interposed bet... | 02/29/2000 |
| 6019360 | Plastic pipe vise A vise for securing plastic pipe while sawing a section of pipe to length is formed by a U-shaped base supported by a plurality of short legs. A V-shaped cradle is pivotally connected by its legs with the legs of the U-shaped member for successively recei... | 02/01/2000 |
| 5971820 | Parallel fluid flow wind and water mills A parallel fluid flow wind or water mill having one or more pair of vanes fixed around a central mass. The vanes showing in cross section a non-aerodynamic face having a plane or concave surface, and a aerodynamic back side are constructed to rotate in a ... | 10/26/1999 |
| 5943173 | Illuminated magnifier reading apparatus An illuminated magnifying lens device for reading sales slips in dim light is formed by a planar base supporting a generally horizontal frame in spaced relation above the base. The frame disposes a magnifying lens transversely of the base. A lamp equipped... | 08/24/1999 |
| 5928546 | Electrical resistance cooker and automatic circuit controller An automatic circuit controller for cooking food interposed between electrodes connected with a source of AC by electrical resistance in which the resistance increases until the food is cooked and rapidly declines is formed by a current switching element ... | 07/27/1999 |
| 5894859 | Compressed gas emergency shutoff valve A safety valve or a compressed gas cylinder is formed by a tubular assembly projecting into the access port of the cylinder and axially controlling a control valve and elongated stem axially connected with the control valve projects into the passageway fo... | 04/20/1999 |
| 5890829 | Reservoir handle scrub brush A cleaning fluid reservoir handle scrub brush is formed by a bristle brush attached to one end of an elongated tube having a piston adjacent one end portion forming a reservoir of fluid. The piston includes a piston rod which is gripped by a manually oper... | 04/06/1999 |
| 5886270 | Electormechanical tuner for stringed instruments An automatic tuning system for a stringed instrument is formed by a microprocessor operating hardware connected with one end portion of the several strings. The hardware principally comprises a reversible motor driving gears and a gear train selectively m... | 03/23/1999 |
| 5882001 | Modular fence structure A picket fence is formed by a plurality of posts having vertically spaced ribs on confronting surfaces for supporting the respective end portion of inverted U-shaped rails. The rails are provided with a plurality of longitudinally equally spaced verticall... | 03/16/1999 |
| 5860442 | Fluid pressure shutoff and relief valve A safety valve for a preventing over pressure in a fluid processing system utilizing a fluid pressure regulator in a fluid supply line upstream from the processing vessel is formed by a valve, normally maintained open by a pressure responsive collapsible ... | 01/19/1999 |
| 5860654 | Portable target assembly An upright open frame formed by an inverted U-shape member having rigidly interconnected legs entering the earth to support the frame in an upright position. A target anchor bar having sufficient mass to normally hold a target taut within the frame is sli... | 01/19/1999 |
| 5836337 | Large diameter low pressure relief valve A large diameter low pressure collapsible pin relief valve adapted to be connected with a vessel containing fluid under low working pressure is formed by a normally closed valve initially released to open by excess fluid pressure in the vessel applied thr... | 11/17/1998 |
| 5836835 | Exercise and memory game A hopscotch like and math instruction game comprising a mat having a plurality of zones on one surface respectively containing a plurality of ramndomly selected single digit numerals permitting players to play the game within the perameters therof.... | 11/17/1998 |
| 5813104 | Sucker rod thread protector removal tool A frusto-conical thread protector on the pin end portion of a sucker rod is removed by a cylindrical housing axially surrounding, at one end portion, the thread protector and the adjacent end portion of the sucker rod. Stop means diametrically mounted on ... | 09/29/1998 |
| 5813855 | Illuminated toothbrush An illuminated toothbrush is formed by a clear plastic body toothbrush having modified plastic filament bristle tufts in its head portion for admitting light into the bristles from a light source illuminated shaft inserted into a socket in the end of the ... | 09/29/1998 |
| 5808553 | Apparatus for enforcing hygiene An apparatus for unlocking the door to a hygienic area is formed by a circuit having a pair of series connected, normally open push button switches disposed in spaced apart relation at lateral limits of a lavatory. When the switch buttons are simultaneous... | 09/15/1998 |
| 5806553 | Fluid pressure control and relief apparatus Fluid pressure above a predetermined limit in a fluid pressure system is reduced by operating a relief valve, having its inlet port connected with the system, in a throttling action. A normally seated valve member is maintained in relief valve closed posi... | 09/15/1998 |
| 5779227 | Crowd control barrier A crowd control barrier is formed by a plurality of congruent rectangular fence panels joined end to end by pins in a plurality of sleeves secured to panel end posts in axi-ally aligned vertically staggered relation. A knee brace secured to adjacent panel... | 07/14/1998 |
| 5778586 | Firearm trigger safety device A trigger safety device for a firearm having a trigger pivotal within a trigger guard on the firearm is formed by an integral end, side wall and bight portion body forming a socket substantially enveloping the trigger guard and including J-shaped hook mea... | 07/14/1998 |
| 5752661 | Motorized pump backpack liquid sprayer A liquid spaying apparatus is formed by a molded plastic generally rectangular container having a forward surface contoured for contacting the back of a user in backpack fashion. A wheel and axle assembly secured to the forward lower portion of a containe... | 05/19/1998 |
| 5733025 | Computer monitor stand A selectable height computer monitor stand is formed by one or a plurality of rectangular rigid spacers underlying a top secured to at least one of the spacers by bolts extending through lateral edges of the top and respective end portions of a clamp plat... | 03/31/1998 |
| 5727586 | Reclosing collapsible pin pressure relief valve A fluid pressure relief valve of the excess pressure collapsible pin relief valve type which monitors fluid pressure in a system and automatically recloses after opening and discharging an initial volume of high pressure fluid. The relief valve includes a... | 03/17/1998 |
| 5706848 | Heat exchanger pressure shutoff valve An excessive fluid pressure safety valve for a fluid processing heat exchanger transferring thermal energy to fluids in the heat exchanger by piping extending through the heat exchanger is formed by a valve, normally maintained open by a pressure responsi... | 01/13/1998 |
