Class 451/252 - Valve abrader

Subclass of Class 451 - Abrading
Definition: Abrading machine particularly adapted to grind a sealing
No. of patents: 22
Last issue date: 07/26/2005

Number	Title	Issue Date
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
6119564	Adjustable grinding support and grinding support assembly using same A grinding support for supporting a workpiece, such as a pin member, during a process of grinding the workpiece. The support particularly supports the workpiece in a stable position during grinding so that larger grinding "cuts" can be taken, thereby spee...	09/19/2000
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
5928061	Wheel-head feed mechanism and grinder using the same A wheel-head feed mechanism for a grinder comprising a base and a wheel head which is guided by a linear guide section provided on the base and rotatably supports a grinding wheel via a wheel spindle driven by a motor. The wheel-head feed mechanism includ...	07/27/1999
5853316	Method of and apparatus for grinding control edges of a control bush A method of grinding control edges of a control bush of a rotary slide valve for hydraulic steering of motor vehicles, includes placement of the control bush in a support in form of slide shoes or a V block and additionally securing the control bush in th...	12/29/1998
5813900	Grinding machine for grinding cylindrical workpieces A grinding machine includes a rotating grinding wheel and workpiece moving apparatus operable to move a workpiece towards and away from the wheel. The apparatus is arranged to move a workpiece support arcuately about an axis to move a workpiece towards or...	09/29/1998
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
5651720	Bore size correcting apparatus In a bore size correcting apparatus, a passing-through jig of an extended type lapping reamer in the bore size trimming device is passed through the bore surface of the workpiece machined by the bore grinding machine to correct the inner size of the workp...	07/29/1997
5441438	Measuring and recording apparatus using fluid as the measuring media for use in the manufacture of hydraulic power steering valves An apparatus for measuring and recording the angular position of the edges of axially extending grooves disposed on an inside cylindrical bore surface or outside cylindrical surface of a workpiece is characterized in that the apparatus includes a shoe, pr...	08/15/1995
5439412	Machine for use in the manufacture of power steering valves A machine for grinding the metering edge contours on edges of axially extending grooves of a power steering valve input-shaft by means of a cylindrical grinding wheel, the machine being constructed to hold and rotate the input-shaft and to increase and de...	08/08/1995
5351363	Poppet valve cleaner A poppet valve cleaner 10 includes a frame 20, a poppet valve brush assembly and a carriage assembly. The poppet valve brush assembly includes a drive motor 32 and a pair of cup shaped steel wire brushes 44 and 46 driven by the motor. The carriage assembl...	10/04/1994
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
5199222	Device for grinding the head of a valve, especially of an internal-combustion engine A device for grinding the head of a valve, especially of an internal-combustion engine, has a rigid stand, a structure for supporting the valve stem in terms of rotation that is arranged fixedly and vertically on the stand, a stop for rotational bearing a...	04/06/1993
5159786	Method for regrinding a worn valve A centerless valve regrinder for resurfacing a worn valve having a face, a tulip connected to the face, a valve stem connected to the tulip, the stem having an axis, a first notch worn into the stem at a location spaced from the tulip, and a second notch ...	11/03/1992
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
5070653	Centerless valve regrinder A centerless valve regrinder for resurfacing a worn valve having a face, a tulip connected to the face, a valve stem connected to the tulip, the stem having an axis, a first notch worn into the stem at a location spaced from the tulip, and a second notch ...	12/10/1991
4987701	Endless belt valve grinder An endless belt valve grinder for refacing valve heads used in internal combustion engines. Grinding is done by rotating the valve face against a moving endless abrasive belt supported on a backing wheel and driven by a driving wheel. The workhead or chuc...	01/29/1991
4630403	Method and machine for grinding rotationally symmetrical workpieces Poppets of lift valves are ground in a grinding machine wherein the chuck clamps the stem midway between the head and the foot of the poppet and is indexible through 180° so as to place the foot into the range of a first portion of the working surface of...	12/23/1986
4612732	Machine for grinding ophthalmic lenses A machine for grinding ophthalmic lenses comprises a frame and a support to which an ophthalmic lens to be processed may be attached pivoted to the frame about an axis parallel to the axis of the grinding tool. A counterweight on the support is movable re...	09/23/1986
4608784	Work spindle device A work spindle device having a rotor which allows a workpiece to be fed and ejected quickly and permits the workpiece to be machined simultaneously at opposite ends thereof. A clamp member having collets on opposite ends and a central axial through hole f...	09/02/1986
4428160	Centerless valve grinding There is provided a valve grinding apparatus for centerless grinding of valves. Two base rollers with parallel axes are driven, and a control roller is centered above the base rollers. The control roller can be raised and lowered and the direction of its ...	01/31/1984

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Class 451/252 - Valve abrader