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| Number | Title | Issue Date |
| 7871312 | Hydrant grinding arrangement An adjustable removable grinding arrangement for grinding inside annular openings in bottom portions of water hydrants. The grinding arrangement comprises a router having an energizable motor with a grinding tool attached to an end thereof, a base plate supportively... | 01/18/2011 |
| 7033133 | Air turbine starter having a low differential check valve An air turbine starter is provided that includes a check valve assembly. The check valve assembly comprises a valve body, a valve seat and a valve element. The valve body includes an inlet port, an outlet port, and a flow passage extending therebetween. The valve se... | 04/25/2006 |
| 6957659 | Sliding disk valve for pneumatic conveyance of abrasive material A linear actuated disk valve for a fluid conveyance system constructed with a valve body having an internal chamber and a passage through the valve body, the valve body having opposite ends with external connectors that continue the passage and that are connectable ... | 10/25/2005 |
| 6921322 | Apparatus and methods for refinishing a surface in-situ The invention features a self-contained, portable apparatus for performing precision grinding operations on metal disks of up to, e.g., 54 inches in diameter. The apparatus can be attached to the surface of the disk to be refinished and is leveled using special prec... | 07/26/2005 |
| 6845783 | Sliding disk valve for pneumatic conveyance of abrasive material A linear actuated disk valve for a fluid conveyance system constructed with a valve body having an internal chamber and a passage through the valve body, the valve body having opposite ends with external connectors that continue the passage and that are connectable ... | 01/25/2005 |
| 6325575 | Tool for machining multiple surfaces on a stationary workpiece A tool for simultaneously machining multiple surfaces on a stationary workpiece can include a rotary tool body having multiple cutter assemblies spaced circumferentially around the tool body. Different ones of the cutter assemblies can include differently... | 12/04/2001 |
| 6267653 | Device for grinding an end face, especially an annular surface at the edge of a workpiece bore A device for grinding an end face at an edge of a workpiece bore of a workpiece has a driven grinding tool and a guide pin, connected to the grinding tool, for insertion into the workpiece. The guide pin is dimensioned so as to precisely match the workpie... | 07/31/2001 |
| 6248008 | Valve lapping tool A valve lapping tool is comprised of a molded plastic and wood particulate composite having knurl pattern on the outside surface of the handle of the tool. Rubber suction cups are attached to the opposite ends of the tool for gripping and rotating a valve... | 06/19/2001 |
| 6173494 | Method of making a valve seat A valve seat for a ball valve, especially a fuel-injection valve for an internal-combustion engine is finely ground to form a trough in the conically-ground seat with a circular arc cross section in planes of the axis and of a depth to eliminate shape var... | 01/16/2001 |
| 6099213 | Automatic boring device An automatic boring device is provided that comprises a tool housing having attached to it two opposing handles with switches mounted thereon for selective engagement of pneumatic controls that activate a clamping device, rotation of a chuck of a pneumati... | 08/08/2000 |
| 6042456 | Suction operated valve resurfacing tool and associated method Disclosed is a suction operated valve resurfacing, or lapping, tool and an associated method for its use. In general terms, the tool of the present invention includes a handle portion and a suction generating means. A reciprocating assembly is adapted for... | 03/28/2000 |
| 5934976 | Method for grinding a taper surface and grinding apparatus using the same A lower side of a rotatable grindstone spindle is connected directly to a PZT (Piezoelectric element). By changing electric drive supplied to the PZT, reciprocating movement can be applied to the grindstone through the grindstone spindle in addition to ro... | 08/10/1999 |
| 5931728 | Device for carrying out mechanical tooling of a valve seat The invention concerns an arrangement for machining a valve seat (1a) in a valve housing (1). The housing has a circular opening (1d) which is concentric with the seat (1a) and about which is a flat annular surface (1e). The arrangement comprises a suppor... | 08/03/1999 |
| 5897429 | Injection molding seat lapping device A lapping device for lapping an injection molding cylinder seat is provided having a housing that supports a gear system. A drive shaft having a lapping disk secured to one end thereof is mounted for rotation within the housing offset from the central axi... | 04/27/1999 |
| 5882250 | Valve refacing tool A valve refacing tool comprising a hollow cylindrical column. The column has an upper end and a lower end and has a central bore throughout its entire length. The column has exterior threads at its upper end and an outwardly flared cylindrical support at ... | 03/16/1999 |
| 5829928 | Apparatus and method for machining valve seats in an engine cylinder head The valve seat and guide machine comprises a base structure which supports a pantograph having a major arm and minor arm which moves slidably with respect to the major arm. A spherical head is supported by a number of sphere seats attached to the pantogra... | 11/03/1998 |
| 5749774 | Valve refacing tool A valve refacing tool comprising a hollow cylindrical column. The column has an upper end and a lower end and has a central bore throughout its entire length. The column has exterior threads at its upper end and an outwardly flared cylindrical support at ... | 05/12/1998 |
| 5725335 | Apparatus for machining valve seats in an engine cylinder head The valve seat and guide machine comprises a base structure on which is pivotally supported a pantograph having a major arm on which is mounted a drive motor and minor arm which moves slidably with respect to the major arm. Pivotally attached to each arm ... | 03/10/1998 |
| 5613809 | Apparatus and method for machining valve seats in an engine cylinder head The valve seat and guide machine comprises a base structure on which is pivotally supported a pantograph having a major arm on which is mounted a drive motor and minor arm which moves slidably with respect to the major arm. Pivotally attached to each arm ... | 03/25/1997 |
| 5337521 | Valve grinder Valve grinder comprising a grinding wheel mounted on a bench, said bench also having a surface for supporting a valve stem support stand mounted a spaced distance from said grinding wheel, said valve stem support stand comprising a pair of V-blocks and va... | 08/16/1994 |
| 5319916 | Valve stem polishing method An apparatus and method for polishing combustion engine valves. The machine includes a rotating deburring wheel for on contact with the valve stem and a regulating surface which provides support and applies a rotational force to the valve stem. A pair of ... | 06/14/1994 |
| 5303509 | Apparatus for producing sealing faces on valves An apparatus for treating valves having a sealing seat embodied on a movable valve element and a valve seat face embodied on a valve seat body in such a way as to improve the surface quality of the sealing faces. The movable valve element is set into a ro... | 04/19/1994 |
| 5218788 | Valve stem polishing method and apparatus An apparatus and method for polishing combustion engine valves. The machine includes a rotating deburring wheel for on contact with the valve stem and a regulating surface which provides support and applies a rotational force to the valve stem. A pair of ... | 06/15/1993 |
| 5148633 | Tool for resurfacing exhaust port flanges A tool that enables resurfacing of exhaust port flanges in the substantial absence of engine disassembly. An air motor that controls rotation of a resurfacing device is carried at the end of an arm assembly including an elbow like joint so that the motor ... | 09/22/1992 |
| 5133154 | Apparatus and fixture for use in grinding the needle tip and the needle seat in a fuel valve An apparatus for use in grinding the needle tip and seat in the needle housing of a fuel valve includes a grinding pin (1) and a holder (4) for the grinding pin. The holder (4) is shaped and dimensioned to be guidingly received within the needle bore (45)... | 07/28/1992 |
| 5097635 | Method and apparatus for automatic ball to seat lapping Disclosed is a new and improved method and apparatus for automatically lapping a ball and a seat of a valve to produce a non-flat lapped sealing surface finish that provides a reliable fluid seal at minimum cost. Either the seat or ball is rotated as the ... | 03/24/1992 |
| 5030046 | Valve seal ring seating machine The disclosure involves a portable milling machine for remachining radially directed access bores of interest in large check valves which is readily attached to and removed from the valve and is precisely alignable with respect to the center of the bore t... | 07/09/1991 |
| 5030041 | Compact boring system A compact boring system 20 for machining the interior surface of cylindrical shapes, such as steam turbine valves and rotors in a field situation. The apparatus is designed to set up in the object itself. A boring bar 26 is rotatably disposed in a pair of... | 07/09/1991 |
| 5001871 | Machine for precision machining, with a rod for the determination of the practical mean axis of a hole of cylindrical general contour Machine for precision machining, with a rod for the determination of the ctical mean axis of a hole of cylindrical general contour. The present invention relates to a machine for precision machining, in particular for the grinding of valve seatings of he... | 03/26/1991 |
| 4996799 | Frost-free silcock seat repair tool A tool is provided for use in repairing a silcock which has a valve stem, a washer and a valve seat axially aligned with the silcock neck with the forward face of the washer being selectively rotatably driven by the stem into and out of sealing abutment w... | 03/05/1991 |
| 4958464 | Lapping machine Lapping machine for lapping the security valve and pressure relief valve body seats installed in all kind of operations working with fluids under pressure, such as nuclear power plants, power stations, petrochemical plants, refineries, cellulose industrie... | 09/25/1990 |
| 4901752 | Apparatus for maintenance of ball valve Apparatus for maintenance of the moveable pipe sleeves (52), bearing surface and seals of a ball valve. The apparatus has a bonnet (7) designed to be secured to and form a tight connection with a valve flange (53) and fastened to the underside of the bonn... | 02/20/1990 |
| 4852306 | Toolholder device for a machine tool The present invention relates to a toolholder device for a machine tool. A device according to the invention integral with a table (3) moveable in two directions perpendicular to one another comprises a toolholder spindle (1), a sleeve (2) with a lower bearing... | 08/01/1989 |
| 4833835 | Portable liquid and gas valve seat grinder A portable valve seat grinder and method of its use is disclosed. The portable valve seat grinder comprises a body element with a longitudinal hole there through, with bushings mounted in the longitudinal hole. The body element has screw threads on one en... | 05/30/1989 |
| 4800684 | Apparatus for grinding and lapping sealing surfaces in slide valves and the like in situ or in the workshop An apparatus for grinding and lapping sealing surfaces in slide valves and the like in situ or in the workshop has a base plate (21), a drive (6), and a rotatably mounted tool plate (3) which is connected to the drive (6) by a supporting element (4) and c... | 01/31/1989 |
| 4715149 | Steady rest for valve grinding apparatus Flow valve seat grinding apparatus incorporating an improved steady rest means. Includes a tubular drive shaft housing which houses and supports a rotatable and longitudinally movable drive shaft means. Drive shaft is connected through a flexible torque c... | 12/29/1987 |
| 4678379 | Apparatus for machining a valve's seat Apparatus for machining a stop valve seat ring while the valve remains piped to a turbine comprises a pair of spiders with adjustable arms which fit within the valve and a shaft rotatably supported by the spiders and driven through a gear train by a motor... | 07/07/1987 |
| 4672786 | Valve seat grinding apparatus Valve seat grinding apparatus incorporating an improved articulated rotatable torque transferring coupling. The coupling includes torque transfer member in connection with a pair of functionally cylindrical torque members. Each torque member includes a ci... | 06/16/1987 |
| 4637762 | Hand-operated valve refacer A valve refacing tool having a housing with a bore therethrough which includes a large-diameter portion at one end thereof. A substantially cylindrical support is disposed within the large-diameter portion of the bore and is removably fixed to the housing... | 01/20/1987 |
| 4630977 | Valve seat resurfacing apparatus An apparatus and method for resurfacing valve seats in a cylinder head are based upon utilizing a modified constant velocity universal joint of the type used in front wheel drive automobiles. A valve seat resurfacing cutting tool is driven at a constant v... | 12/23/1986 |
