US4685202A
Expired / Lapsed
US
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Method of forming a coupling disc for an electromagnetic coupling
Assignee: Dana Inc
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Filing: 1986-01-13
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Granted: 1987-08-11
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Expires: 2006-01-13
Abstract
Abstract A method of forming non-magnetic barriers in the coupling disc (e.g., the armature or rotor) of an electromagnetic coupling such as a clutch or brake. The method is carried out by moving the disc relative to a laser beam which cuts a slot through the disc. In one embodiment, the slot is filled throughout its entire length by non-magnetic material, the filling being effected by continuously advancing a non-magnetic wire toward the laser beam to cause the wire to be melted by the beam and to flow into the newly formed slot. In another embodiment, the wire is advanced intermittently to form short non-magnetic bridges beween relatively long slots.
Inventors
- 👤 Dwight E. Booth
- 👤 Michael L. Cory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:08
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/14; B; B23; B23K; B23K26/00; B23K26/20; B23K26/32; B23K26/34; B23K26/342; B23K26/36; B23K26/38; B23K26/382; B23K26/384; F16D27/02; F16D27/04; F16D27/06; F16D27/10; F16D27/108; F16D27/112; B23K2103/00; B23K2103/02; B23K2103/04; B23K2103/05; B23K2103/08; B23K2103/10; B23K2103/12; B23K2103/18; B23K2103/50; F16D2027/008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
110 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a disc made of magnetic material, directing a laser beam toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative turning between said disc and said laser beam to cause said laser beam to heat said disc and form curved slot means in the disc, and filling at least selected portions of said slot means with molten non-magnetic material different from the magnetic material of said disc and capable of welding to the edges of said slot means.
Claim 2
Independent Claim
110 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a disc made of magnetic material, directing a laser beam toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative turning between said disc and said laser beam to cause said laser beam to heat said disc and form curved slot means in the disc, and filling at least selected portions of said slot means with molten non-magnetic material different from the magnetic material of said disc and capable of welding to the edges of said slot means.
Claim 3
Dependent Claim
85 words
A method as defined in claim 1 in which an elongated rod of said non-magnetic material is located in closely spaced relation with said laser beam, said method further comprising the step of advancing said rod lengthwise toward said laser beam and said slot means during said relative turning thereby to cause said rod to be melted by said laser beam and to cause said non-magnetic material to flow into and fill said portions of said slot means immediately after formation of said slot means.
Claim 4
Dependent Claim
62 words
A method as defined in claim 2 in which said laser beam and said disc are relatively rotated through substantially 360 degrees about an axis coinciding with the center of the disc and in which said laser beam is directed continuously at said disc during substantially the entire relative rotation whereby said laser beam forms a substantially circular slot around said disc.
Claim 5
Dependent Claim
32 words
A method as defined in claim 3 in which said rod is advanced substantially continuously during substantially the entire relative rotation whereby substantially the entire slot is filled with said non-magnetic material.
Claim 6
Dependent Claim
33 words
A method as defined in claim 3 in which said rod is advanced intermittently during said relative rotation whereby only angularly spaced arcuate portions of said slot are filled with said non-magnetic material.
Claim 7
Dependent Claim
42 words
A method as defined in claim 5 in which the intermittent advance of said rod is timed such that the angularly spaced filled portions of said slot are substantially shorter in arcuate length than the angularly spaced unfilled portions of said slot.
Claim 8
Independent Claim
164 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative rotation between said disc and said laser beam through a full 360 degrees about an axis coinciding with the center of the disc to cause said laser beam to heat said disc and to form a circular slot completely around and through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and continuously advancing said rod lengthwise toward said slot during said relative rotation thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill said slot and to become welded to the heated edges thereof.
Claim 9
Independent Claim
164 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative rotation between said disc and said laser beam through a full 360 degrees about an axis coinciding with the center of the disc to cause said laser beam to heat said disc and to form a circular slot completely around and through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and continuously advancing said rod lengthwise toward said slot during said relative rotation thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill said slot and to become welded to the heated edges thereof.
Claim 10
Dependent Claim
32 words
A method as defined in claim 7 in which said laser beam is directed toward the face of the coupling disc opposite the face which defines the coupling face of the disc.
Claim 11
Independent Claim
168 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative rotation between said disc and said laser through a full 360 degrees about an axis coinciding with the center of the disc to cause said laser beam to heat said disc and to form a circular slot completely around and through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and intermittently advancing said rod lengthwise toward said slot during said relative rotation thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill angularly spaced arcuate portions of said slot and to become welded to the heated edges thereof.
Claim 12
Independent Claim
168 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative rotation between said disc and said laser through a full 360 degrees about an axis coinciding with the center of the disc to cause said laser beam to heat said disc and to form a circular slot completely around and through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and intermittently advancing said rod lengthwise toward said slot during said relative rotation thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill angularly spaced arcuate portions of said slot and to become welded to the heated edges thereof.
Claim 13
Dependent Claim
42 words
A method as defined in claim 9 in which the intermittent advance of said rod is timed such that the angularly spaced filled portions of said slot are substantially shorter in arcuate length than the angularly spaced unfilled portions of said slot.
Claim 14
Independent Claim
130 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling having a coacting coupling member adapted to selectively engage the coupling disc, said method comprising the steps of, providing a disc made of magnetic material, said disc having a working face for engaging said coupling member and having an opposite non-working face, directing a laser beam toward the non-working face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative movement between said disc and said laser beam to cause said laser beam to heat said disc and form slot means in the disc, and filling at least selected portions of said slot means with molten non-magnetic material capable of welding to the edges of said slot means.
Claim 15
Independent Claim
130 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling having a coacting coupling member adapted to selectively engage the coupling disc, said method comprising the steps of, providing a disc made of magnetic material, said disc having a working face for engaging said coupling member and having an opposite non-working face, directing a laser beam toward the non-working face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative movement between said disc and said laser beam to cause said laser beam to heat said disc and form slot means in the disc, and filling at least selected portions of said slot means with molten non-magnetic material capable of welding to the edges of said slot means.
Claim 16
Dependent Claim
23 words
A method as defined in claim 11 in which said relative movement is effected by turning said disc relative to said laser beam.
Claim 17
Independent Claim
147 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative turning between said disc. and said laser beam to cause said laser beam to heat said disc and to form a curved slot completely through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and continuously advancing said rod lengthwise toward said slot during said relative turning thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill said slot and to become welded to the heated edges thereof.
Claim 18
Independent Claim
147 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative turning between said disc. and said laser beam to cause said laser beam to heat said disc and to form a curved slot completely through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and continuously advancing said rod lengthwise toward said slot during said relative turning thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill said slot and to become welded to the heated edges thereof.
Claim 19
Independent Claim
151 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative turning between said disc and said laser to cause said laser beam to heat said disc and to form a curved slot completely through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and intermittently advancing said rod lengthwise toward said slot during said relative turning thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill angularly spaced curved portions of said slot and to become welded to the heated edges thereof.
Claim 20
Independent Claim
151 words
A method of forming a multiple pole coupling disc for an electromagnetic coupling, said method comprising the steps of, providing a generally circular disc made of magnetic material, directing a laser beam continuously toward one face of said disc at a location between the center of the disc and the outer periphery thereof, effecting relative turning between said disc and said laser to cause said laser beam to heat said disc and to form a curved slot completely through the disc, providing an elongated rod of non-magnetic material in closely spaced and angularly fixed relation with said laser beam, and intermittently advancing said rod lengthwise toward said slot during said relative turning thereby to cause melting of said non-magnetic material by said laser beam and to cause said non-magnetic material to flow into and fill angularly spaced curved portions of said slot and to become welded to the heated edges thereof.
Claim 21
Dependent Claim
42 words
A method as defined in claim 14 in which the intermittent advance of said rod is timed such that the angularly spaced filled portions of said slot are substantially shorter in arcuate length than the angularly spaced unfilled portions of said slot.
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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |