Patent US4567927A successfully refreshed from Google Patents.
US4567927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for automatically forming ovals
Assignee: Individual
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Filing: 1984-09-14
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Granted: 1986-02-04
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Expires: 2004-09-14
Abstract
Abstract An apparatus for forming elliptical shapes on a workpiece. The invention involves a support frame which includes a pair of uprights having cantilevered beams from which are suspended a support disk. A pair of mutually perpendicular trammel tracks are set into this support frame. A journaled block is mounted into each trammel track. A trammel beam is rotatably mounted to the two journaled blocks, and a tool attached to the trammel beam, so that as the trammel beam rotates, with the blocks restricted to slide each only in its own track, the tool is required to follow an elliptical path. A ring is caused to revolve about the support frame by a prime mover. Attached to the ring is a bearing block, which slideably holds one end of the trammel beam. Thus as the ring revolves, the beam is caused to automatically and continually rotate, with the tool following its elliptical path. A workpiece holder holds the workpiece stationary in facing relationship in front of the tool, so that the elliptical shape is traced onto the workpiece. The support frame is provided with means to move the cantilevered arms up and down, which in turn causes the tool to move toward and away from the workpiece, thus enabling a variability in the depth of cut if the tool is a cutting tool.
Inventors
- 👤 Kenneth O. Plamann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
B; B25; B25H; B25H7/00; B25H7/04; B25H7/045; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; B23Q27/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/306216; Y10T409/306384; Y10T409/30644
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
116 words
An apparatus for cutting elliptical shapes in a workpiece, comprising: a support means for supporting the apparatus; a pair of mutually perpendicular trammel tracks mounted to said support means; a pair of journaled blocks, one slideably mounted to each of said perpendicular trammel tracks; a trammel beam, rotatably mounted to both of said sliding blocks; a cutting tool attached to said trammel beam; means for holding the workpiece in cutting engagement with said cutting tool such that the workpiece is immobile with respect to said support means; and means for automatically rotating said trammel beam with respect to said workpiece and support means, such that said cutting tool automatically makes an elliptical cut in the workpiece.
Claim 2
Independent Claim
116 words
An apparatus for cutting elliptical shapes in a workpiece, comprising: a support means for supporting the apparatus; a pair of mutually perpendicular trammel tracks mounted to said support means; a pair of journaled blocks, one slideably mounted to each of said perpendicular trammel tracks; a trammel beam, rotatably mounted to both of said sliding blocks; a cutting tool attached to said trammel beam; means for holding the workpiece in cutting engagement with said cutting tool such that the workpiece is immobile with respect to said support means; and means for automatically rotating said trammel beam with respect to said workpiece and support means, such that said cutting tool automatically makes an elliptical cut in the workpiece.
Claim 3
Dependent Claim
23 words
An apparatus as recited in claim 1 wherein said support means includes means for varying the depth of cut of said cutting tool.
Claim 4
Dependent Claim
41 words
An apparatus as recited in claim 1 wherein said support means includes means for moving said cutting tool towards and away from the workpiece, such that the depth of cut made by said cutting tool in the workpiece can be varied.
Claim 5
Dependent Claim
78 words
An apparatus as recited in claim 2 or claim 3 further comprising first and second mounting means, one for each of said pair of journaled blocks, for rotatably mounting said trammel beam to said journaled blocks; and wherein one of said first and second mounting means is moveable along at least part of the length of said trammel beam, while the other of said first and second mounting means is not moveable with respect to said trammel beam.
Claim 6
Dependent Claim
35 words
An apparatus as recited in claim 4 further comprising attaching means for attaching said cutting tool to said trammel beam; and wherein said attaching means is moveable along at least part of said trammel beam.
Claim 7
Dependent Claim
40 words
An apparatus as recited in claim 5 wherein said means for attaching said cutting tool and said moveable one of said first and second mounting means are arranged such that the major and minor radii can be set to zero.
Claim 8
Dependent Claim
25 words
An apparatus as recited in claim 5 wherein said attaching means also allows said cutting tool to be tilted with respect to said trammel beam.
Claim 9
Dependent Claim
38 words
An apparatus as recited in claim 7 further comprising means for moving said attaching means and said one of said first and second mounting means which is moveable, and for locking them into positions selected by the operator.
Claim 10
Dependent Claim
82 words
An apparatus as recited in claim 8 wherein said automatically rotating means includes: a ring journaled about said support means outside of said trammel tracks; and a bearing block, secured to said ring and slideably holding an end of said trammel beam; said ring being caused to rotate by a prime mover; such that as said ring rotates, said bearing block causes said trammel beam to rotate, which in turn causes said cutting tool to make an elliptical cut in the workpiece.
Claim 11
Independent Claim
116 words
An apparatus for marking elliptical shapes on a workpiece, comprising: a support means for supporting the apparatus; a pair of mutually perpendicular trammel tracks mounted to said support means; a pair of journaled blocks, one slideably mounted to each of said perpendicular trammel tracks; a trammel beam, rotatably mounted to both of said sliding blocks; a scribing tool attached to said trammel beam; means for holding the workpiece in marking engagement with said scribing tool such that the workpiece is immobile with respect to said support means; and means for automatically rotating said trammel beam with respect to said workpiece and support means, such that said scribing tool automatically makes an elliptical mark on the workpiece.
Claim 12
Independent Claim
116 words
An apparatus for marking elliptical shapes on a workpiece, comprising: a support means for supporting the apparatus; a pair of mutually perpendicular trammel tracks mounted to said support means; a pair of journaled blocks, one slideably mounted to each of said perpendicular trammel tracks; a trammel beam, rotatably mounted to both of said sliding blocks; a scribing tool attached to said trammel beam; means for holding the workpiece in marking engagement with said scribing tool such that the workpiece is immobile with respect to said support means; and means for automatically rotating said trammel beam with respect to said workpiece and support means, such that said scribing tool automatically makes an elliptical mark on the workpiece.
Claim 13
Dependent Claim
24 words
An apparatus as recited in claim 10 wherein said support means includes means for moving said scribing tool towards and away from the workpiece.
Claim 14
Dependent Claim
75 words
An apparatus as recited in claim 11 further comprising first and second mounting means, one for each of said pair of journaled blocks, for rotatably mounting said trammel beam to said journaled blocks; and wherein one of said first and second mounting means is moveable along at least part of the length of said trammel beam, while the other of said first and second mounting means is not moveable with respect to said trammel beam.
Claim 15
Dependent Claim
35 words
An apparatus as recited in claim 12 further comprising attaching means for attaching said scribing tool to said trammel beam; and wherein said attaching means is moveable along at least part of said trammel beam.
Claim 16
Dependent Claim
40 words
An apparatus as recited in claim 13 wherein said means for attaching said cutting tool and said moveable one of said first and second mounting means are arranged such that the major and minor radii can be set to zero.
Claim 17
Dependent Claim
25 words
An apparatus as recited in claim 13 wherein said attaching means also allows said scribing tool to be tilted with respect to said trammel beam.
Claim 18
Dependent Claim
38 words
An apparatus as recited in claim 15 further comprising means for moving said attaching means and said one of said first and second mounting means which is moveable, and for locking them into position selected by the operator.
Claim 19
Dependent Claim
82 words
An apparatus as recited in claim 16 wherein said automatically rotating means includes: a ring journaled about said support means outside of said trammel tracks; and a bearing block, secured to said ring and slideably holding an end of said trammel beam; said ring being caused to rotate by a prime mover; such that as said ring rotates, said bearing block causes said trammel beam to rotate, which in turn causes said scribing tool to make an elliptical mark on the workpiece.
References Cited (Backward Citations)
US4306598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |