Patent US3479378A successfully refreshed from Google Patents.
Patent US3864879A successfully refreshed from Google Patents.
US3864879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam grinding
Assignee: Individual
•
Filing: 1973-04-26
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Granted: 1975-02-11
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Expires: 1993-04-26
Abstract
Abstract Cam grinding apparatus comprising a frame adapted to be pivotally mounted between the headstock and tailstock of a grinding machine, workpiece holding means arranged on the frame to carry a cam workpiece to be ground with its axis parallel to but eccentric from the headstock-tailstock axis means to drive the workpiece holding means to rotate a workpiece carried therein, and master cam holding means associated with the workpiece holding means and arranged to carry a master cam in engagement with a guide surface whereby the frame pivots about its mounting to carry the workpiece towards or away from the grinding wheel of the machine in accordance with the master cam on rotation of the cam workpiece.
Inventors
- 👤 William Dixon Naismith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:58
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/08; B24B19/12; B24B17/00; B24B17/02; B24B17/025; B24B17/026; B24B41/00; B24B41/06; B24B41/061; B24B41/062
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
239 words
For use with a grinding machine having a bed, a grinding wheel having a rotation axis, a headstock and a tailstock with a headstock-tailstock axis; a cam grinding attachment comprising a frame having means for pivotal mounting between the headstock and tailstock of the grinding machine, workpiece holding means carried by the frame having means to carry a cam workpiece to be ground with its axis parallel to but eccentric from the headstock-tailstock axis, drive means coupled to the workpiece holding means to provide substantially continuous rotation of a workpiece carried therein, a master cam holding means coupled with the workpiece holding means having an axis coaxial with the axis of the workpiece and having means to carry a master cam, a first support member, a guide member pivotally mounted on the support member for pivotal movement about an axis parallel to the axis of the master cam holding means but eccentric therefrom and having a guide surface for engagement with a master cam, adjustment means coupled with the guide member whereby the guide member may be pivotally adjusted so that the guide surface registers with the grinding wheel surface in a plane joining the axes of rotation of the grinding wheel and a cam workpiece whereby in use the frame pivots about its mounting means to carry the workpiece towards or away from the grinding wheel in accordance with the master cam on rotation of the cam workpiece.
Claim 2
Dependent Claim
239 words
For use with a grinding machine having a bed, a grinding wheel having a rotation axis, a headstock and a tailstock with a headstock-tailstock axis; a cam grinding attachment comprising a frame having means for pivotal mounting between the headstock and tailstock of the grinding machine, workpiece holding means carried by the frame having means to carry a cam workpiece to be ground with its axis parallel to but eccentric from the headstock-tailstock axis, drive means coupled to the workpiece holding means to provide substantially continuous rotation of a workpiece carried therein, a master cam holding means coupled with the workpiece holding means having an axis coaxial with the axis of the workpiece and having means to carry a master cam, a first support member, a guide member pivotally mounted on the support member for pivotal movement about an axis parallel to the axis of the master cam holding means but eccentric therefrom and having a guide surface for engagement with a master cam, adjustment means coupled with the guide member whereby the guide member may be pivotally adjusted so that the guide surface registers with the grinding wheel surface in a plane joining the axes of rotation of the grinding wheel and a cam workpiece whereby in use the frame pivots about its mounting means to carry the workpiece towards or away from the grinding wheel in accordance with the master cam on rotation of the cam workpiece.
Claim 3
Dependent Claim
86 words
Apparatus as claimed in claim 1 including a second support member for location on the bed of the grinding machine, a first shaft having one end rotatably mounted in the second support and another end having means for rotatable mounting in said headstock of the grinding apparatus, said first shaft being coupled to be driven from the headstock of the grinding machine, wherein said frame is pivotally mounted about said first shaft and said workpiece holding means is coupled to be driven from said first shaft.
Claim 4
Dependent Claim
50 words
Apparatus as claimed in claim 2 wherein said frame comprises a headstOck end plate pivotally mounted about said first shaft, a tailstock end plate having means for rotatable mounting in the tailstock of the grinding machine, the two end plates being rigidly connected by means of an adjustable length member.
Claim 5
Dependent Claim
31 words
Apparatus as claimed in claim 3, wherein said workpiece holding means includes a chuck carried on one end of a second shaft which is rotatably mounted in said headstock end plate.
Claim 6
Dependent Claim
24 words
Apparatus as claimed in claim 4, wherein said second shaft is coupled with the first shaft by means of a belt or chain drive.
Claim 7
Dependent Claim
28 words
Apparatus as claimed in claim 4, wherein said second shaft is extended at the other end to form the master cam holding means to receive said master cam.
Claim 8
Dependent Claim
18 words
Apparatus as claimed in claim 1, including a plurality of master cams carried by said cam holding means.
Claim 9
Dependent Claim
23 words
Apparatus as claimed in claim 1, wherein first support member has mounting means for mounting it on the bed of the grinding machine.
Claim 10
Dependent Claim
57 words
Apparatus as claimed in claim 1 including lead screw means coupled with said first support member whereby said first support member may be moved along the bed of the grinding machine relative to said cam holding means to align the guide surface with a chosen one of a group of cams carried in said cam holding means.
Claim 11
Dependent Claim
39 words
Apparatus as claimed in claim 1, wherein said guide member is pivotally carried on a slide member which is adjustably movable in said first support member in a direction transverse to the axis of the master cam holding means.
Claim 12
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein said workpiece holding means includes calibrated means whereby the angular orientation between a workpiece held therein and said master cam may be adjusted.
Claim 13
Dependent Claim
32 words
Apparatus as claimed in claim 1, wherein said frame is resiliently biassed about its pivot axis to carry a cam workpiece thereon into engagement with the grinding wheel of the grinding machine.
Claim 14
Dependent Claim
33 words
Apparatus as claimed in claim 1 wherein catch means is provided to retain the frame in an inoperative position with a cam workpiece thereon clear of the grinding wheel of the grinding machine.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |