US3876335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded rotor
Assignee: Cegelec SA
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Filing: 1972-08-23
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Granted: 1975-04-08
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Expires: 1992-08-23
Abstract
Abstract A rotor for turbines or the like formed of an axial succession of elements,uch as discs or rings, welded together with radially internal adjacent portions of two consecutive elements forming an annular ridge projecting radially inwardly, the ridge having the general form of a trapezoid.
Inventors
- 👤 Charles Forcinal
- 👤 Rene Perrin
- 👤 Andre Coulon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:25
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/02; B; B23; B23K; B23K33/00; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/063
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A rotor for turbines or the like, comprising an axial succession of annular elements having contiguous base portions welded to one another to form an internal hollow, with radially internal adjacent base portions of two consecutive elements forming an annular ridge projecting radially inwardly into said internal hollow, characterized in that this ridge has a generally trapezoidal configuration, the small base of the trapezoid being the portion of the ridge which projects furthest, wherein the height of the said ridge is equal to at least 10 times and at most 20 times the maximum depth of the irregularities likely to occur at the small base of said trapezoidal cross section when welding is carried out.
Claim 2
Dependent Claim
115 words
A rotor for turbines or the like, comprising an axial succession of annular elements having contiguous base portions welded to one another to form an internal hollow, with radially internal adjacent base portions of two consecutive elements forming an annular ridge projecting radially inwardly into said internal hollow, characterized in that this ridge has a generally trapezoidal configuration, the small base of the trapezoid being the portion of the ridge which projects furthest, wherein the height of the said ridge is equal to at least 10 times and at most 20 times the maximum depth of the irregularities likely to occur at the small base of said trapezoidal cross section when welding is carried out.
Claim 3
Dependent Claim
25 words
A rotor according to claim 1, wherein the height of said trapezoidal cross section is at least 10 mm and at the most 20 mm.
Claim 4
Dependent Claim
22 words
A rotor according to claim 1, wherein the sides of said trapezoidal configuration are inclined at about 45.degree. relatively to the bases.
Claim 5
Dependent Claim
26 words
A rotor according to claim 3, wherein the small base of said trapezoidal cross section has substantially the same length as the height of said ridge.
Claim 6
Dependent Claim
26 words
A rotor according to claim 3, wherein the small base of said trapezoidal cross section has substantially the same length as the height of said ridge.
Claim 7
Dependent Claim
94 words
A rotor for turbines or the like, comprising a plurality of annular elements having contiguous base portions welded to one another in axial succession with a continuous internal hollow thereby being formed therein, the radially internal adjacent base portions of each two consecutive elements forming an annular ridge projecting radially inwardly into said internal hollow, each ridge having a generally trapezoidal configuration with the small base of the trapezoid being the portion of the ridge which projects furthest into said hollow, said small base being equal in length to the height of said ridge.
Claim 8
Dependent Claim
94 words
A rotor for turbines or the like, comprising a plurality of annular elements having contiguous base portions welded to one another in axial succession with a continuous internal hollow thereby being formed therein, the radially internal adjacent base portions of each two consecutive elements forming an annular ridge projecting radially inwardly into said internal hollow, each ridge having a generally trapezoidal configuration with the small base of the trapezoid being the portion of the ridge which projects furthest into said hollow, said small base being equal in length to the height of said ridge.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |