US3823590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical coil forming machine
Assignee: Dayco Products LLC
•
Filing: 1973-03-21
•
Granted: 1974-07-16
•
Expires: 1993-03-21
Abstract
Abstract A pair of large wire supply rolls are rotatably supported by a cantilevered tubular shaft, and corresponding wires extend from the rolls to a coil forming rotor which is also supported by a cantilevered tubular shaft aligned axially with the roll support shaft. Wire is withdrawn from the wire supply rolls by rotation of the rotor which includes precisely driven wheels for feeding the wires through corresponding sets of casting rollers to form a continuous double helix nonrotating coil. A nonrotating mandrel projects through the roll support shaft for supporting the helical coil as it is being formed and progresses axially between a set of endless belts which feed the continuous coil from the coil forming rotor and control the pitch of the wire turns of the coil. A disc brake system is mounted on the roll support shaft for braking the rotation of the wire supply rolls to control the tension in the wires, and the roll support shaft is pivotable in a horizontal direction to facilitate loading of new wire supply rolls into the machine. The machine is also adapted to be used with only one wire supply roll when only a single helix nonrotating continuous coil is required.
Inventors
- 👤 E Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/04; B21F35/00; B21F35/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
Apparatus for continuously producing a nonrotating coil having helical wire turns of substantially uniform diameter, comprising a coil forming rotor including means for receiving a wire and for deforming the wire beyond its elastic limit into continuous wire turns, first shaft means for supporting said rotor for rotation on an axis, drive means for rotating said rotor, second shaft means for supporting a supply roll of wire on an axis substantially aligned with the axis of rotation of said rotor, means on said rotor for directing the wire from the supply roll to said wire deforming means, and means for guiding the coil axially from said rotor as the coil is formed by rotation of said rotor.
Claim 2
Dependent Claim
117 words
Apparatus for continuously producing a nonrotating coil having helical wire turns of substantially uniform diameter, comprising a coil forming rotor including means for receiving a wire and for deforming the wire beyond its elastic limit into continuous wire turns, first shaft means for supporting said rotor for rotation on an axis, drive means for rotating said rotor, second shaft means for supporting a supply roll of wire on an axis substantially aligned with the axis of rotation of said rotor, means on said rotor for directing the wire from the supply roll to said wire deforming means, and means for guiding the coil axially from said rotor as the coil is formed by rotation of said rotor.
Claim 3
Dependent Claim
29 words
Apparatus as defined in claim 1 wherein said second shaft means comprises an elongated tubular shaft, and means for supporting a mandrel for axial movement within said tubular shaft.
Claim 4
Dependent Claim
72 words
Apparatus as defined in claim 2 wherein said means for driving said rotor include a motor, a plurality of endless feed belts positioned to engage the helical coil at circumferentially spaced intervals and press the coil against said mandrel, and means connected to said motor for driving said belts in timed relation with the rotation of said rotor to effect positive axial feeding of the coil and said mandrel from said rotor.
Claim 5
Dependent Claim
43 words
Apparatus as defined in claim 1 wherein said second shaft means comprises an elongated shaft, and means supporting said shaft for lateral movement between a wire roll loading position and a coil forming position in axial alignment with the axis of said rotor.
Claim 6
Dependent Claim
34 words
Apparatus as defined in claim 1 wherein said rotor includes at least one flyer arm extending generally parallel to the axis of rotation of said rotor and located radially outboard of the supply roll.
Claim 7
Dependent Claim
33 words
Apparatus as defined in claim 1 wherein said first shaft means for supporting said rotor comprise a tubular shaft, and the coil is directed axially through said shaft as the coil is formed.
Claim 8
Dependent Claim
30 words
Apparatus as defined in claim 1 including means for variably braking the rotation of the wire supply roll as the supply roll rotates in response to rotation of said rotor.
Claim 9
Dependent Claim
118 words
Apparatus for continuously producing a nonrotating coil having helical wire turns of substantially uniform diameter, comprising a coil forming rotor including means for receiving a wire and for deforming the wire beyond its elastic limit into contInuous wire turns, a tubular shaft supporting said rotor for rotation on an axis, drive means for rotating said rotor, means for supporting a supply roll of wire on an axis substantially aligned with the axis of rotation of said rotor, means on said rotor for directing the wire from the supply roll to said wire deforming means, and means for feeding the coil axially through said tubular shaft supporting said rotor as the coil is formed by rotation of said rotor.
Claim 10
Dependent Claim
118 words
Apparatus for continuously producing a nonrotating coil having helical wire turns of substantially uniform diameter, comprising a coil forming rotor including means for receiving a wire and for deforming the wire beyond its elastic limit into contInuous wire turns, a tubular shaft supporting said rotor for rotation on an axis, drive means for rotating said rotor, means for supporting a supply roll of wire on an axis substantially aligned with the axis of rotation of said rotor, means on said rotor for directing the wire from the supply roll to said wire deforming means, and means for feeding the coil axially through said tubular shaft supporting said rotor as the coil is formed by rotation of said rotor.
Claim 11
Dependent Claim
43 words
Apparatus as defined in claim 8 wherein said means for supporting a supply roll of wire include a second tubular shaft, and means on said second shaft for supporting a mandrel in a position projecting axially into said tubular shaft supporting said rotor.
Claim 12
Dependent Claim
36 words
Apparatus as defined in claim 9 including means supporting said second tubular shaft for lateral movement between a wire roll loading position and a coil forming position in axial alignment with said shaft supporting said rotor.
References Cited (Backward Citations)
US3183583A
Cited
US3322164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |