Patent US3560709A successfully refreshed from Google Patents.
US3560709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical furnace for heating a metallic sleeve
Assignee: Burgess Norton Manufacturing Co Inc
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Filing: 1968-10-04
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Granted: 1971-02-02
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Expires: 1988-10-04
Abstract
Abstract An assembly for heat shrinking a metal sleeve or tube upon a metal arbor. The assembly comprises an electrically heat oven or furnace and means for retaining a tube or sleeve in the oven during heating. The total assembly also includes means for moving the heated tube onto an arbor upon which it is to be shrunk into final position.
Inventors
- 👤 William T Crane
- 👤 Kenneth L Landmark
- 👤 Paul A Rosene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:09
CPC Classifications
H; H05; H05B; H05B3/00; B; B23; B23P; B23P11/00; B23P11/02; B23P11/025; F; F27; F27D; F27D11/00; F27D11/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
An oven comprising in combination: a tubular housing; said housing including a metallic outer shell, a metallic inner shell and thermal insulation between said shells; an electric heating unit within said housing; electrical insulators positioned on the inner shell of said housing and supporting said heating unit; a positioning ring unit within said housing for positioning a tube and shaped to hold said tube out of contact with said heating unit; a cover for said housing formed of insulating material and dimensioned to close said housing at one end; a removable support projecting across said housing and adapted to support a tube in said housing; and an insulated removable closure for the bottom of said housing.
Claim 2
Dependent Claim
116 words
An oven comprising in combination: a tubular housing; said housing including a metallic outer shell, a metallic inner shell and thermal insulation between said shells; an electric heating unit within said housing; electrical insulators positioned on the inner shell of said housing and supporting said heating unit; a positioning ring unit within said housing for positioning a tube and shaped to hold said tube out of contact with said heating unit; a cover for said housing formed of insulating material and dimensioned to close said housing at one end; a removable support projecting across said housing and adapted to support a tube in said housing; and an insulated removable closure for the bottom of said housing.
Claim 3
Dependent Claim
14 words
The combination of claim 2 characterized by the fact that said insulators are ceramic.
Claim 4
Dependent Claim
25 words
The combination of claim 1 further characterized by the fact said coVer for said housing is provided with means for centering it on said housing.
Claim 5
Dependent Claim
27 words
The combination of claim 4 characterized by the fact that said cover is provided on its inner face with means to center a tube and project thereinto.
Claim 6
Dependent Claim
13 words
The combination of claim 5 further including a base and an opening therethrough.
Claim 7
Dependent Claim
80 words
The combination of claim 6 further characterized by the fact that: said oven is adapted to be positioned adjacent a ram; said ram is positioned to push a tube from said housing and onto an arbor; said ram is axially aligned with said housing and of suitable size to pass therethrough; the electrical heating unit is formed in a helix; said insulators are ceramic; said tubular housing is positioned avoce and in axial alignment with said opening in said base.
Claim 8
Dependent Claim
37 words
The combination of claim 7 characterized by the fact that said furnace is adapted to be positioned in combination with an arbor beneath and axially aligned with it and said ram above and axially aligned with it.
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |