US3887202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed grind fixture
Assignee: Individual
•
Filing: 1974-09-10
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Granted: 1975-06-03
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Expires: 1994-09-10
Abstract
Abstract A grinding fixture has a rotatable workpiece-holding spindle which may be indexed at any selected angular division of a circle, utilizing at least two circumferentially spaced indexers radially insertable into and retractable from the interspaces between adjacent teeth spaced at ten degree intervals around the circumferential face of an associated rotatable spindle. The indexed angle is determined by the circumferential spacing of the indexers with respect to the interspaces. Either a collet, scroll chuck or V-block may be used to mount the workpiece on the fixture.
Inventors
- 👤 Bruno J Zapart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:00
CPC Classifications
B; B23; B23Q; B23Q16/00; B23Q16/02; B23Q16/04; B24; B24B; B24B41/00; B24B41/06; Y; Y10; Y10T; Y10T279/00; Y10T279/13; Y10T279/34; Y10T279/3406
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
213 words
A workpiece holder comprising an outer cylindrical housing, a hollow open-ended generally cylindrical spindle extending concentrically within said housing and projecting forwardly therefrom, a forward annular closure rigidly secured to said housing, a rearward annular closure including a rearwardly extending concentrically disposed manipulating ring attached to said spindle, bearing means within said housing rotatably supporting said spindle, a row of 36 equally spaced radially directed and outwardly tapered spindle teeth extending concentrically around the spindle, the circumferential spacing between the inmost points between each pair of the interspaces at each side of each tooth subtending an angle of ten degrees at the axis of rotation of the spindle, a plurality of circumferentially spaced, radially movable spindle-engaging indexers mounted along the exterior of said housing, said indexers projecting radially inward through the wall of the housing to removable engagement with selected pairs of adjacent teeth along the adjoining tapered surfaces of the teeth for precluding rotary movement of the spindle, said indexers including at least a first and a second indexer spaced respectively for movement along radial planes subtending an angle in degrees at the axis of the spindle which is the product of the number ten and a mixed number, and clamping means effective to removably secure a workpiece to the revoluble spindle.
Claim 2
Dependent Claim
213 words
A workpiece holder comprising an outer cylindrical housing, a hollow open-ended generally cylindrical spindle extending concentrically within said housing and projecting forwardly therefrom, a forward annular closure rigidly secured to said housing, a rearward annular closure including a rearwardly extending concentrically disposed manipulating ring attached to said spindle, bearing means within said housing rotatably supporting said spindle, a row of 36 equally spaced radially directed and outwardly tapered spindle teeth extending concentrically around the spindle, the circumferential spacing between the inmost points between each pair of the interspaces at each side of each tooth subtending an angle of ten degrees at the axis of rotation of the spindle, a plurality of circumferentially spaced, radially movable spindle-engaging indexers mounted along the exterior of said housing, said indexers projecting radially inward through the wall of the housing to removable engagement with selected pairs of adjacent teeth along the adjoining tapered surfaces of the teeth for precluding rotary movement of the spindle, said indexers including at least a first and a second indexer spaced respectively for movement along radial planes subtending an angle in degrees at the axis of the spindle which is the product of the number ten and a mixed number, and clamping means effective to removably secure a workpiece to the revoluble spindle.
Claim 3
Dependent Claim
213 words
A workpiece holder comprising an outer cylindrical housing, a hollow open-ended generally cylindrical spindle extending concentrically within said housing and projecting forwardly therefrom, a forward annular closure rigidly secured to said housing, a rearward annular closure including a rearwardly extending concentrically disposed manipulating ring attached to said spindle, bearing means within said housing rotatably supporting said spindle, a row of 36 equally spaced radially directed and outwardly tapered spindle teeth extending concentrically around the spindle, the circumferential spacing between the inmost points between each pair of the interspaces at each side of each tooth subtending an angle of ten degrees at the axis of rotation of the spindle, a plurality of circumferentially spaced, radially movable spindle-engaging indexers mounted along the exterior of said housing, said indexers projecting radially inward through the wall of the housing to removable engagement with selected pairs of adjacent teeth along the adjoining tapered surfaces of the teeth for precluding rotary movement of the spindle, said indexers including at least a first and a second indexer spaced respectively for movement along radial planes subtending an angle in degrees at the axis of the spindle which is the product of the number ten and a mixed number, and clamping means effective to removably secure a workpiece to the revoluble spindle.
Claim 4
Dependent Claim
213 words
A workpiece holder comprising an outer cylindrical housing, a hollow open-ended generally cylindrical spindle extending concentrically within said housing and projecting forwardly therefrom, a forward annular closure rigidly secured to said housing, a rearward annular closure including a rearwardly extending concentrically disposed manipulating ring attached to said spindle, bearing means within said housing rotatably supporting said spindle, a row of 36 equally spaced radially directed and outwardly tapered spindle teeth extending concentrically around the spindle, the circumferential spacing between the inmost points between each pair of the interspaces at each side of each tooth subtending an angle of ten degrees at the axis of rotation of the spindle, a plurality of circumferentially spaced, radially movable spindle-engaging indexers mounted along the exterior of said housing, said indexers projecting radially inward through the wall of the housing to removable engagement with selected pairs of adjacent teeth along the adjoining tapered surfaces of the teeth for precluding rotary movement of the spindle, said indexers including at least a first and a second indexer spaced respectively for movement along radial planes subtending an angle in degrees at the axis of the spindle which is the product of the number ten and a mixed number, and clamping means effective to removably secure a workpiece to the revoluble spindle.
Claim 5
Dependent Claim
63 words
The workpiece holder in accordance with claim 1, wherein the paths of movement of the first and the second indexers are respectively along angularly spaced planes extending upwardly from the axis of rotation of said spindle, the plane defining the path of the second indexer being angularly displaced from the plane defining the path of the first indexer by an angle of 45*.
Claim 6
Dependent Claim
32 words
The subject matter of claim 2, wherein the movement of the first indexer is along a path defined by a vertical plane extending upwardly from the axis of rotation of the spindle.
Claim 7
Dependent Claim
96 words
The workpiece holder defined in claim 1, including supplemental locking means effective to preclude rotary movement of the spindle with respect to the housing, said locking means comprising at least one inwardly extending recess in said spindle spatially adjacent to said row of spindle teeth, a lockpin mounted on the exterior of said housing and projecting radially inward through the wall of the housing, said lockpin being reciprocably movable into and out of said recess, and external indicating means effective to index the angular position of said spindle at which said recess registers with said lockpin.
Claim 8
Dependent Claim
37 words
The workpiece holder as set forth in claim 4, wherein the angular locking position of the spindle is along an axial plane extending upwardly from the axis of rotation of the spindle at an angle of 45*.
Claim 9
Dependent Claim
84 words
The workpiece holder according to claim 1, in which an integral flange projects from the inner and rearward side of the annular forward end closure, said flange extending into said housing in slip-fit engagement therewith, the innermost surface of the flange being disposed adjacent to said row of spindle teeth, guide slots rectangular in section extending radially through said flange in the direction of movement of said indexers, and teeth-engaging shoes rectangular in section slidably fitted into said slots for guided reciprocable movement therealong.
Claim 10
Dependent Claim
51 words
The workpiece holder as claimed in claim 1, wherein the topmost point of the rearward end portion of said housing is indicated by means of an index mark, and the perimetrical surface of said rearward end closure has formed therealong a plurality of graduation marks selectively coextensive with said index mark.
Claim 11
Dependent Claim
84 words
A workpiece holder as defined in claim 1, wherein the internal diameter of said rearwardly extending manipulating ring is less than the internal diameter of said spindle and a collet passing axially through said spindle threadedly engages said ring, said collet extending forwardly from said ring beyond the forward end of said spindle, and truing means for aligning the collet coaxially with the axis of rotation of said spindle concurrently with the tightening of the manipulating ring to effect clamping movement of said collet.
Claim 12
Dependent Claim
35 words
The workpiece holder as claimed in claim 8, wherein a scroll chuck having a concentric rearwardly projecting shaft is mounted for rotation on the spindle, said shaft extending into the collet in clamping relationship therewith.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |