Patent US3860780A successfully refreshed from Google Patents.
US3860780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making self-centering pulley using mig welding
Assignee: DYNALOC CORP
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Filing: 1973-09-24
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Granted: 1975-01-14
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Expires: 1993-09-24
Abstract
Abstract A method and apparatus for depositing a stream of molten material upon the surface of a generally cylindrical pulley structure to form spirally tending ribbing thereon. The preferred apparatus includes a device for rotating the pulley, a MIG welding device, suitable mechanisms for moving the welding head along the axis of the pulley, and means for varying the feed rate of the welding wire to the welding head as the head is moved along the length of the pulley whereby the height of the ribbing above the pulley surface varies over the length of the pulley.
Inventors
- 👤 Rene Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:42
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/04; B23K9/044; B23K9/046; B23K9/02; B23K9/032; B23K9/0325
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
Apparatus for making self-centering pulleys of the type which include a generally cylindrical body having spirally tending ribbing on the outer surface thereof, comprising: first means for supporting said body and causing it to revolve about its longitudinal axis; second means for continuously depositing quick-setting molten material upon the outer surface of said body; third means for moving said second means relative to said first means for depositing said material in a bead upon said surface to form the spirally tending ribbing; and control means for varying the quantity of said material deposited upon said surface so as to effectively provide a taper to said deposited material.
Claim 2
Dependent Claim
107 words
Apparatus for making self-centering pulleys of the type which include a generally cylindrical body having spirally tending ribbing on the outer surface thereof, comprising: first means for supporting said body and causing it to revolve about its longitudinal axis; second means for continuously depositing quick-setting molten material upon the outer surface of said body; third means for moving said second means relative to said first means for depositing said material in a bead upon said surface to form the spirally tending ribbing; and control means for varying the quantity of said material deposited upon said surface so as to effectively provide a taper to said deposited material.
Claim 3
Dependent Claim
72 words
Apparatus as recited in claim 1 wherein said second means includes an arc welding means having a head unit disposed prOximate said surface and means for causing said head unit to oscillate in a direction generally transverse to its direction of movement parallel to said axis so as to effectively provide a full fillet regardless of the amount of said material being deposited and to provide a wavy texture to said bead.
Claim 4
Dependent Claim
61 words
Apparatus as recited in claim 2 wherein said means for causing said head unit to oscillate the a caming means for includes engaging said surface and a rocker arm coupling said caming means to said head unit whereby said head unit is caused to rotate in said oscillatory fashion about a pivot point as said caming means rollingly engages said surface.
Claim 5
Dependent Claim
62 words
Apparatus as recited in claim 3 wherein said welding means further includes a weld guide carried adjacent said surface and including two spaced apart parallel wall members disposed to lie along the sides of the oscillatory path followed by said head unit, said weld guide being operative to control the width of the weld-bead formed on said surface by said head unit.
Claim 6
Dependent Claim
39 words
Apparatus as recited in claim 4 wherein said wall members include ceramic plates having lower edges for engaging said surface, and fore and aft side edges extending beyond the limits of the oscillatory path followed by said head unit.
Claim 7
Dependent Claim
62 words
Apparatus as recited in claim 5 wherein said control means further includes means for varying the rate at which welding material is fed to said head unit whereby the height to which said weld bead extends above said surface at one point along the length of said pulley differs from the height of that formed at a second point along said length.
Claim 8
Dependent Claim
59 words
Apparatus as recited in claim 2 wherein said means for causing said head unit to oscillate includes an electromechanical actuator means and a rocker arm for coupling said actuator means to said head unit whereby said head unit is caused to rotate in oscillatory fashion about a pivot point when alternating electrical energy is supplied to said actuator means.
Claim 9
Independent Claim
105 words
A method of making self-centering pulleys of the type which include a generally cylindrical body having spirally tending ribbing on the outer surface thereof, comprising the steps of: rotating said body about its longitudinal axis; moving a source of quick setting molten material parallel to the longitudinal axis of said body; continuously depositing a stream of quick setting molten material from said source onto said surface of said body; and varying the flow rate of said molten material as said source is moved along said path whereby spirally tending ribbing of uniformly varying height above said surface is formed over the length of said body.
Claim 10
Independent Claim
105 words
A method of making self-centering pulleys of the type which include a generally cylindrical body having spirally tending ribbing on the outer surface thereof, comprising the steps of: rotating said body about its longitudinal axis; moving a source of quick setting molten material parallel to the longitudinal axis of said body; continuously depositing a stream of quick setting molten material from said source onto said surface of said body; and varying the flow rate of said molten material as said source is moved along said path whereby spirally tending ribbing of uniformly varying height above said surface is formed over the length of said body.
Claim 11
Dependent Claim
39 words
A method of making pulleys as recited in claim 8 wherein the step of varying said flow rate is accomplished by varying at a controlled rate the amount of welding material supplied to a welding head within said source.
Claim 12
Dependent Claim
66 words
A method of making pulleys as recited in claim 9 and further including the step of oscillating said welding head back and forth in a direction generally normal to its directions of movement relative to said axis for providing a full fillet regardless of the amount of said material being deposited by said source and for producing a wavy texture to the surface of said bead.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |