US3800660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for milling large radius curves
Assignee: AG Industries Inc Ohio
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Filing: 1973-01-02
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Granted: 1974-04-02
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Expires: 1993-01-02
Abstract
Abstract Apparatus for milling a large radius curved face on a large metal plate, comprising a horizontally reciprocating table upon which the plate is secured, with a long cross-member extending transversely of the table, and a short slider mounted upon the cross-member for movement transverse of the table, with a rotating milling cutter mounted upon the slider and extending downwardly for milling the face of the plate as it reciprocates beneath the cross-member. Two sets of long tracks are fastened upon and extend along the upper and lower edges of the crossmember, each set having a pair of oppositely curved surfaces vertically aligned with a curved track surface of the other set to form two pair of upper and lower vertically aligned, oppositely curved, i.e., concave and convex surfaces of curvatures corresponding to the curved surface to be formed upon the plate. Corresponding pairs of short, curved surface guide bars are mounted upon the slider, with the bars being transversely movable relative to the slider so as to engage only one pair of vertically aligned track surfaces at a time, whereby the slider is supported for movement along the track surfaces and the slider and cutter may thereby be moved along either a convex or cancave path across the plate for alternatively cutting either a concave or convex face surface upon the reciprocating plate.
Inventors
- 👤 F Gladwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:28
CPC Classifications
B; B23; B23C; B23C1/00; B23C1/16; B23C1/20; B23C3/00; B23C3/13; B23C3/16; B23C3/20; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/52; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/301624; Y10T409/30168; Y10T409/302968; Y10T409/303192; Y10T82/00; Y10T82/25; Y10T82/2511
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
214 words
An apparatus for milling large radius curves upon the surface of a large plate-like workpiece comprising: a reciprocating table upon which the workpiece is secured; a fixed cross-member extending over the table transversely to its direction of reciprocation; a slider supported upon the cross-member for sliding movement along the length of the cross-member and having a milling cutter mounted thereon for milling the surface of the workpiece as it reciprocates upon the table beneath the cross-member; said cross-member having a pair of elongated vertically aligned tracks secured upon its upper and lower edges, with one track having a track surface which is concave and the other track having a track surface which is correspondingly convex, with their radii of curvature being of a predetermined large diameter; said slider having a pair of slide bars which are short relative to the cross-member tracks, each slide bar arranged to rest against and slide along the length of and being correspondingly curved for face to face contact with one of said tracks; and means for moving the slider at a controlled rate along the length of said cross-member, whereby the slider and thus the milling cutter are gradually moved along an arcuate path transversely to the reciprocating workpiece to thereby mill a large radius curved surface thereon.
Claim 2
Independent Claim
214 words
An apparatus for milling large radius curves upon the surface of a large plate-like workpiece comprising: a reciprocating table upon which the workpiece is secured; a fixed cross-member extending over the table transversely to its direction of reciprocation; a slider supported upon the cross-member for sliding movement along the length of the cross-member and having a milling cutter mounted thereon for milling the surface of the workpiece as it reciprocates upon the table beneath the cross-member; said cross-member having a pair of elongated vertically aligned tracks secured upon its upper and lower edges, with one track having a track surface which is concave and the other track having a track surface which is correspondingly convex, with their radii of curvature being of a predetermined large diameter; said slider having a pair of slide bars which are short relative to the cross-member tracks, each slide bar arranged to rest against and slide along the length of and being correspondingly curved for face to face contact with one of said tracks; and means for moving the slider at a controlled rate along the length of said cross-member, whereby the slider and thus the milling cutter are gradually moved along an arcuate path transversely to the reciprocating workpiece to thereby mill a large radius curved surface thereon.
Claim 3
Dependent Claim
130 words
An apparatus as defined in claim 1, and including a second pair of tracks arranged parallel to the first pair upon said cross-member, but with the track surfaces of the second pair of tracks being curved convexly and concavely in reverse directions to their respective adjacent tracks; and a second pair of slide bars upon the slider shaped for sliding in contact with said second track surfaces, but arranged in a plane alongside of said second track surfaces; and means for sliding the guide bars transversely to their lengths for disengaging one pair of guide bars from their track surfaces and simultaneously engaging the second pair of guide bars with their respective track surfaces instead, for thereby permitting movement of the slider and milling cutter in an opposite arcuate direction.
Claim 4
Dependent Claim
57 words
An apparatus as defined in claim 2 and said pairs of Tracks being spaced apart a predetermined distance, and said slide bars being closely arranged and joined together along their lengths so that one pair of guide bars engage their respective tracks while the second pair of guide bars are arranged in the space between the tracks.
Claim 5
Independent Claim
198 words
An apparatus for milling large radius curves upon the surface of a large plate-like workpiece comprising: a reciprocating table upon which the workpiece is secured; a cross-member spaced above and extending over the table transversely to its direction of reciprocation; a slider supported upon the cross-member for sliding movement along the length of the cross-member and having tool means mounted thereon for operating upon the surface of the workpiece as it reciprocates beneath the cross-member; a pair of spaced apart, elongated, vertically aligned tracks secured upon and extending along the length direction of said cross-member, with one track being concave and the other track being correspondingly convex, and with their radii of curvature being of a predetermined large diameter; said slider having a pair of slide bars which are short relative to the length of the tracks, each slide bar arranged to rest against and slide along the length of and being correspondingly curved for face to face contact wth one of said tracks; said slider being movable along the length of said cross-member for thereby moving said tool means along an arcuate path transversely to the reciprocating workpiece to thereby form a large radius curved surface thereon.
Claim 6
Independent Claim
198 words
An apparatus for milling large radius curves upon the surface of a large plate-like workpiece comprising: a reciprocating table upon which the workpiece is secured; a cross-member spaced above and extending over the table transversely to its direction of reciprocation; a slider supported upon the cross-member for sliding movement along the length of the cross-member and having tool means mounted thereon for operating upon the surface of the workpiece as it reciprocates beneath the cross-member; a pair of spaced apart, elongated, vertically aligned tracks secured upon and extending along the length direction of said cross-member, with one track being concave and the other track being correspondingly convex, and with their radii of curvature being of a predetermined large diameter; said slider having a pair of slide bars which are short relative to the length of the tracks, each slide bar arranged to rest against and slide along the length of and being correspondingly curved for face to face contact wth one of said tracks; said slider being movable along the length of said cross-member for thereby moving said tool means along an arcuate path transversely to the reciprocating workpiece to thereby form a large radius curved surface thereon.
Claim 7
Dependent Claim
125 words
An apparatus as defined in claim 4, and including a second pair of tracks arranged parallel to the first pair upon said cross-member, but with the second pair of tracks being curved convexly and concavely in reverse directions to their respective adjacent first mentioned tracks; and said slider having a second pair of slide bars for sliding in contact with said second track surfaces, but arranged in a plane alongside of said second track surfaces; and means for sliding the guide bars transversely to their lengths for disengaging one pair of guide bars from their tracks and simultaneously engaging the second pair of guide bars with their respective tracks instead, for thereby permitting movement of the slider and tool means in an opposite arcuate direction.
Claim 8
Dependent Claim
52 words
An apparatus as defined in claim 5 and said pairs of tracks being spaced apart a predetermined distance, and said slide bars being closely arranged so that one pair of guide bars engage their respective tracks while the second pair of guide bars are arranged in the space between the adjacent tracks.
References Cited (Backward Citations)
US287838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |