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| Number | Title | Issue Date |
| 5588389 | Dual lift boat hull A boat hull having a bow lifting surface, a stepped bottom aft of the bow to create an air space between the water and the bottom of the hull and a stern lifting surface extending downwardly from the stepped bottom such that the bow lifting surface and th... | 12/31/1996 |
| 5574469 | Locomotive collision avoidance method and system A method and system are disclosed for improved collision avoidance of two locomotives by periodically receiving on each locomotive digitally encoded data to determine its geographical location, speed and direction of travel by means of an onboard global p... | 11/12/1996 |
| 5542480 | Perforating gun with retrievable mounting strips A longitudinally slotted carrier having one end adapted for mounting on a tubing string, the carrier being nonplanar, with a slotted configuration and interior dimensions to enable capsule charge orientation at selected phases between 0 and 360 degrees. T... | 08/06/1996 |
| 5505663 | Self operable transfer system for the disabled A playground apparatus having a departure platform accessible by a person in a wheelchair, a transfer platform at a remote location, conveyor to transport the person between the platforms and a play apparatus to return to the departure platform. The conve... | 04/09/1996 |
| 5481983 | Magnetic sweeper apparatus and method A magnetic sweeper 20 is disclosed for capturing airborne particles which exhibit ferromagnetic behavior. The magnetic sweeper 20 uses a magnet(s) 43 having a magnetic field strength which captures particles coming within a predetermined distance of the m... | 01/09/1996 |
| 5405081 | Anti-abrasion rail seat system A fluid impervious polymeric membrane separating a resilient pad from a railroad crosstie and having a width substantially greater than the resilient pad to resist moisture and mechanical forces in penetration between the concrete tie and the pad. The wid... | 04/11/1995 |
| 5406419 | Airmotor powered remote adjustable mirror An air powered motor 10, mounted inside an outer cover 11 to effect the movement of a mirror 12 in one or more axis 35. The pneumatic motor is coaxial with a threaded and pivoted rod 13 and contains a rotor or ring gear 14 with vanes 15 arrayed around the... | 04/11/1995 |
| 5295549 | Mechanical lock to prevent seal ring rotation An earth boring bit of the type having at least one rotatable cutter on a bearing shaft, a hydrostatic pressure compensator to balance the pressure of the lubricant with the pressure of the drilling fluid in the borehole, a metal face seal assembly of the... | 03/22/1994 |
| 5253987 | Fluid end for high-pressure fluid pumps A fluid end for use in high-pressure, reciprocating, fluid pumps has a cylinder with a bore therethrough in which a plunger reciprocates. A valve body is disposed at one end of the bore and includes suction valve seat and a discharge valve seat, which are... | 10/19/1993 |
| 5203568 | Golf training device An improved golf instructional device with a support member adapted to be held against a conventional or standard golf club, a coupler secured to the support member and a link of adjustable length. An arm pad is supported on one end of the adjustable link... | 04/20/1993 |
| 5152860 | Modular composite structure and method A method of constructing fibrous composite material, and a resulting structure, having a modular construction in which the modules are formed on mandrel assemblies having a metal core and an elastomeric, deformable and removable sheath. Fibrous composite ... | 10/06/1992 |
| 5129471 | Earth boring bit with protected seal means An earth boring bit having a body, pressure compensating lubricating system and cantilevered bearing shaft with an annular seal surface and a radial seal surface. A cutter is rotatably secured to the bearing shaft, with an annular seal recess having radia... | 07/14/1992 |
| 5054716 | Drive system for tiltrotor aircraft A drive system for a tiltrotor aircraft that provides for the operation of both proprotors by either engine or by both engines. The drive system provides an interconnecting drive shaft that extends between and connects the engines in such a manner that po... | 10/08/1991 |
| 5029906 | Method and apparatus for forming a ventable seal A deformable sealing member is disposed between two surfaces such that a space is provided to at least one side of such sealing member. A smaller space may be provided to a second side of the sealing member. The sealing member is conformed to contact both... | 07/09/1991 |
| 4984643 | Anti-balling earth boring bit A three cone earth boring bit having circumferential rows of earth disintegrating teeth of wear resistant inserts of selected projection from the cone surfaces, one cone having an inner row separated from a heel row by a narrow circumferential groove and ... | 01/15/1991 |
| 4953641 | Two cone bit with non-opposite cones A two-cone earth boring bit having non-opposite cones that minimize the tendency for off-center rotation or rough running. The bit is composed of two cones, each having a cantilevered bearing shaft with an axis extending inwardly and downwardly. A rotatab... | 09/04/1990 |
| 4923020 | Rock bit with rigid face seals and recessed energizers An improved mechanical face seal for rock bits using rigid rings and energizers placed in recesses or grooves in the cutter and bearing shaft. The minimum diameter of the shaft groove is substantially equal to the relaxed inside diameter of the shaft ener... | 05/08/1990 |
| 4903786 | Earth boring bit with improved two piece bearing and seal assembly An earth boring bit having an improved two piece bearing and seal assembly containing a cantilevered bearing lug that is threaded to receive a mating bearing sleeve, the lug having a transverse shoulder intersected by a mouth on the sleeve to define a bea... | 02/27/1990 |
| 4899838 | Earth boring bit with convergent cutter bearing An earth boring bit having a body and a cantilevered bearing shaft extending inwardly and downwardly from the body. A rotatable cutter with an open end is assembled over the shaft, which has a journal surface formed around a longitudinal axis. The cutter ... | 02/13/1990 |
| 4893844 | Tubular coupling with ventable seal A deformable sealing member is disposed between two surfaces such that a space is provided to at least one side of such sealing member. A smaller space may be provided to a second side of the sealing member. The sealing member is conformed to contact both... | 01/16/1990 |
| 4887675 | Earth boring bit with pin mounted compensator An earth boring (rock) bit having a flexible diaphragm located inside the bearing shaft in a cavity between a threaded lug and a mating bearing sleeve. The diaphragm has an enlarged periphery, shaped somewhat like an o-ring, that is confined and sealed be... | 12/19/1989 |
| 4853180 | Method of manufacturing bushings with powdered metals A die assembly having a cavity in which powdered metal is compressed with upper and lower punches. A core extends through the lower punch to form the inner wall of a bushing, and a core extension rod having a lateral protrusion that extends into the cavit... | 08/01/1989 |
| 4832135 | Flow through raise boring bit An improved raise boring bit to enhance cuttings removal and prevent accumulation of cuttings on the body of the bit, which utilizes a pair of radial rails and a plate connected with and strengthening the rails while defining an opening for the flow of cu... | 05/23/1989 |
| 4822216 | Partial hole threading system Improved apparatus for threading a longitudinally divided partial hole in a machine component has a tap driving spindle selectively and reciprocally carried by a frame. On a base plate is a positioning means for holding the component in a predetermined re... | 04/18/1989 |
| 4817787 | Detonatong cord safety transport system A system for safely transporting detonating cord that uses a container with a mounting board of insulating material with a walled path through which the cord is threaded. The path has a series of loop regions and adjoining, parallel regions through which ... | 04/04/1989 |
| 4818201 | Method of manufacturing bushings with powdered metals A die assembly having a cavity in which powdered metal is compressed with upper and lower punches. A core extends through the lower punch to form the inner wall of a bushing, and a core extension rod having a lateral protrusion that extends into the cavit... | 04/04/1989 |
| 4794822 | Rock bit manufacturing method A method of manufacturing a rock bit of previously formed lugs which will be welded to form a body. Initially, a shank end positioner means such as drilled holes are formed on the lug, which are then positioned on a mating receiver such as dowels in a fix... | 01/03/1989 |
| 4794022 | Stable bedding method and apparatus This invention is an improved method of treating wood waste, the apparatus useful in treating the wood waste. Wood waste, which is a mixture of wood chips, wood shavings, and sawdust, is treated with a food grade oil. The resulting bedding is comparativel... | 12/27/1988 |
| 4775016 | Downhole pressure fluctuating feedback system An improved feedback system for use with an oscillator carried in a bore hole is provided. The feedback system connects the output legs of a well bore oscillator to the feedback nozzles of the oscillator. It consists of a detachable housing that contains ... | 10/04/1988 |
| 4759415 | Rock bit with improved extended nozzle An earth boring bit with an improved extended jet nozzle constructed with a tube having only one curved entrance near the head of the bit and a straight region adjacent the exit of the nozzle, with the curved region being smoothly convergent without subst... | 07/26/1988 |
| 4753303 | Earth boring bit with two piece bearing and rigid face seal assembly An earth boring bit having a cantilevered bearing shaft and a compensator system to equalize the pressure of the lubricant with the hydrostatic pressure of the drilling fluid surrounding the bit. A rigid face seal assembly, positioned between the cutter a... | 06/28/1988 |
| 4753304 | Volume and pressure balanced rigid face seal for rock bits An earth boring bit having a rotatable cutter secured to a lubricated, cantilevered bearing shaft, sealed with an improved pressure compensating rigid face seal assembly. The assembly has a rigid ring with a radial face that opposes and engages a radial f... | 06/28/1988 |
| 4727942 | Compensator for earth boring bits In an earth boring bit of the type having a rotatable cone secured to a bearing shaft, an improved pressure compensating and relief system. A flexible diaphragm has an enlarge peripheral portion in an o-ring configuration sealingly secured in a compensato... | 03/01/1988 |
| 4703814 | Earth boring bit having a replaceable, threaded nozzle with wrench socket An improved earth boring bit of the type having diamond cutting elements and a fluid passageway to direct drilling fluid toward a borehole bottom during drilling, a metal nozzle with a cylindrical, threaded exterior and a noncircular throat having a minim... | 11/03/1987 |
| 4671368 | Earth boring bit with shear compression seal An earth boring bit having a lubrication system that includes a pressure compensator and seals to confine lubricant within the bearings between rotatable cutters and shafts, the seals being of the asymmetrical shear/compression type, each half of which ha... | 06/09/1987 |
| 4665814 | Impacting nut cracker An impacting nut cracker which utilizes an impacting plunger activated by a compression spring or electrical solenoid to deliver a sharp blow to an aligned adjustable anvil to provide a stroke of measured distance to a nut confined against a tailstock anv... | 05/19/1987 |
| 4666001 | Earth boring bit with improved rigid face seal assembly An earth boring bit having a cantilevered bearing shaft and a compensator system to equalize the pressure of the lubricant with the hydrostatic pressure of the drilling fluid surrounding the bit. A rigid face seal assembly, positioned between the cutter a... | 05/19/1987 |
| 4664722 | Method for protecting from hardening a selected region of a steel structure A method for hardening a selected region of a steel bearing surface of an earth boring bit using the steps of stretching a rubber protector over a seal region to be protected from treatment (the rubber being selected from the group consisting of silicone,... | 05/12/1987 |
| 4649733 | Punch with compression sleeve A punch for setting a rivet has features to prevent swelling of the rivet between the two members being secured together. The punch has an elongated, solid blow transmitting member with a blow receiving surface and a shank. A sleeve is slidingly carried b... | 03/17/1987 |
| 4646858 | Earth boring bit with air system access An earth boring bit of the "air cooled" type that includes an air passage access system, including a generally vertical passage with an opening on the exterior of the leg or in the shank cavity that forms part of the body of the bit. This vertical passage... | 03/03/1987 |
