# US 10,442,052 B2 · Grinding stroke control device for a valve stem grinding apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,442,052 B2 - Document ID: US10442052B2 - Status: Granted - Kind: B2 - Application number: 15/730,741 - Filed: 2017-10-12 - Published: 2019-04-18 - Granted: 2019-10-15 - Earliest claimed: 2017-10-12 - Assignees: Yon-Fong Machinery Co., Ltd - Applicants: Yon-Fong Machinery Co., Ltd - Inventors: Feng-Yu Chang - Web page: https://patentgrep.com/patent/US10442052B2 ## CPC - B24B 5/045: {with the grinding wheel axis perpendicular to the workpiece axis} - B24B 5/36: Single-purpose machines or devices - B24B 7/16: for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings (for combined grinding of surfaces of revolution and adjacent plane surfaces on work B24B5/01; for grinding edges of bevels on work B24B9/00) - B24B 27/0076: {grinding machines comprising two or more grinding tools} - B24B 27/0084: {the grinding wheel support being angularly adjustable} - B24B 27/02: Bench grinders - B24B 41/06: Work supports, e.g. adjustable steadies (B24B37/27 takes precedence) - B24B 47/22: Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation - B24B 49/03: according to the final size of the previously ground workpiece - B24B 49/12: involving optical means - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS ## Abstract A grinding stroke control device for a valve stem grinding apparatus is fixed to a processing machine and provided for gripping a valve stem or a test bar. Using the hand wheel, the dial gauge and the positioning seat can obtain an initial position, then moving the measuring meter of the positioning mechanism along the transverse direction to make sure the valve stem has the right length with a standard valve clearance. By such arrangements, the grinding stroke control device for a stem valve grinding apparatus of the invention can have a less complicated structure and therefore is more convenient to operate. ## Claims ### Claim 1 A grinding stroke control device for a valve stem grinding apparatus being fixed to a processing machine, the processing machine comprising a grinding wheel, wherein the grinding stroke control device is provided for gripping a valve stem or a test bar, the valve stem and the test bar each include a shaft portion and a fixing portion connected to the shaft portion, the grinding stroke control device comprising: an arbor extending from the processing machine along a transverse direction; a positioning mechanism including a fixing seat and a measuring meter, wherein the fixing seat is fixed to the processing machine, the measuring meter is mounted on and movable with respect to the fixing seat along the transverse direction, the measuring meter includes a telescopic rod provided for contacting the shaft portion; a rotary mechanism including: a rotary seat, a press rod and a positioning seat, wherein the rotary seat is coupled to and movable with respect to the arbor along the transverse direction, the rotary seat is rotatable with respect to the arbor and includes a hand wheel and a dial gauge, rotating the hand wheel causes movement of the rotary seat along the transverse direction, the dial gauge rotates synchronously with the hand wheel, the rotary seat includes a gripping groove, the press rod is capable of being movably inserted into or moved out of the gripping groove, and is provided for pressing against the shaft portion of the valve stem or the test bar, the positioning seat is coupled to and movable with respect to the rotary seat along the transverse direction, and the positioning seat is to be abutted against by the fixing portion, and includes a passage for insertion of the shaft portion. ### Claim 2 (depends on 1) The grinding stroke control device as claimed in claim 1, wherein the rotary seat includes a sleeve portion and a gripping portion which extend in different directions, and the hand wheel and the dial gauge are located on the sleeve portion. ### Claim 3 A grinding stroke control device for a valve stem grinding apparatus being fixed to a processing machine, the processing machine comprising a grinding wheel, wherein the grinding stroke control device is provided for gripping a valve stem or a test bar, the valve stem and the test bar each include a shaft portion and a fixing portion connected to the shaft portion, the grinding stroke control device comprising: an arbor extending from the processing machine along a transverse direction; a positioning mechanism including a fixing seat, an adjustment member, a movable seat and a measuring meter, wherein the fixing seat is fixed to the processing machine, the adjustment member is mounted on and movable with respect to the fixing seat along the transverse direction, the movable seat is fixed to the adjustment member and therefore movable in the transverse direction along with the adjustment member, the measuring meter is fixed to the movable seat and includes a telescopic rod extending in the transverse direction and provided for contacting the shaft portion; a rotary mechanism including a rotary seat, a press rod and a positioning seat, wherein the rotary seat is coupled to and movable with respect to the arbor along the transverse direction, the rotary seat is rotatable with respect to the arbor and includes a sleeve portion and a gripping portion which extend in different directions, the sleeve portion is sleeved onto the arbor, and includes a rotary section and an adjustment section connected to the rotary section, the rotary section is connected to the gripping portion and rotatable with respect to the arbor, so as to allow the gripping portion to rotate about the arbor, the adjustment section includes a hand wheel and a dial gauge, rotating the hand wheel can move the rotary seat along the transverse direction, the dial gauge rotates synchronously with the hand wheel to measure a rotation angle of the hand wheel, and then infer a amount of displacement of the rotary seat, the gripping portion includes a gripping groove; the press rod is capable of being movably inserted into or moved out of the gripping groove, and is provided for pressing against the shaft portion of the valve stem or the test bar, so that the shaft portion is fixed in the gripping groove without moving in the transverse direction, the positioning seat is coupled to the gripping portion, movable with respect to the gripping portion along the transverse direction, and includes two abutting portions to be abutted against by the fixing portion, and a passage for insertion of the shaft portion is defined between the two abutting portions. ### Claim 4 (depends on 3) The grinding stroke control device as claimed in claim 3, wherein the fixing seat includes a pivot hole, the adjustment member has one end inserted in the pivot hole, and another end provided with an adjustment portion for gripping by a user. ### Claim 5 (depends on 3) The grinding stroke control device as claimed in claim 3 further comprising an elastic member sleeved onto the adjustment member and located between the movable seat and the fixing seat to provide a force for pushing the movable seat away from the fixing seat. ### Claim 6 A grinding stroke control device for a valve stem grinding apparatus being fixed to a processing machine, the processing machine comprising a grinding wheel, wherein the grinding stroke control device is provided for gripping a valve stem or a test bar, the valve stem and the test bar each include a shaft portion and a fixing portion connected to the shaft portion, the grinding stroke control device comprising: an arbor extending from the processing machine along a transverse direction; a positioning mechanism including a fixing seat and a measuring meter, wherein the fixing seat is fixed to the processing machine, the measuring meter is mounted on and movable with respect to the fixing seat along the transverse direction, the measuring meter includes a telescopic rod provided for contacting the shaft portion; a rotary mechanism including: a rotary seat, a press rod and a positioning seat, wherein the rotary seat is coupled to and movable with respect to the arbor along the transverse direction, the rotary seat is provided with a slide groove extending along the transverse direction, the rotary seat is rotatable with respect to the arbor and includes a hand wheel, rotating the hand wheel causes movement of the rotary seat along the transverse direction, the rotary seat includes a gripping groove; an optical measuring device includes a positioning seat, a mounting member, a sensor, and a to-be-sensed member, the positioning seat is fixed to the fixing seat, the mounting member is fixed to the positioning seat and includes a connecting portion and a mounting portion connected to the connecting portion, the connecting portion is fixed to the positioning seat, and the sensor is fixed to the mounting portion of the mounting member, the to-be-sensed member is fixed in the slide groove and capable of detecting a displacement of the to-be-sensed member; the press rod is capable of being movably inserted into or moved out of the gripping groove, and is provided for pressing against the shaft portion of the valve stem or the test bar; the positioning seat is coupled to and movable with respect to the rotary seat along the transverse direction, and the positioning seat is to be abutted against by the fixing portion, and includes a passage for insertion of the shaft portion. ### Claim 7 (depends on 6) The grinding stroke control device as claimed in claim 6, wherein the sensor is signally connected to a display by a wire, so that data detected by the sensor is displayed on the display. ### Claim 8 (depends on 6) The grinding stroke control device as claimed in claim 6, wherein the fixing seat includes a pivot hole, the adjustment member has one end inserted in the pivot hole, and another end provided with an adjustment portion for gripping by a user. ### Claim 9 (depends on 6) The grinding stroke control device as claimed in claim 6 further comprising an elastic member sleeved onto the adjustment member and located between the movable seat and the fixing seat to provide a force for pushing the movable seat away from the fixing seat.