Patent US3235941A successfully refreshed from Google Patents.
US3235941A
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Method of making tubular joints
Assignee: Lord Manufacturing Co
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Filing: 1964-10-30
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Granted: 1966-02-22
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Expires: 1984-10-30
Abstract
No abstract record available.
Inventors
- 👤 Alvin S Krotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:37
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29D; B29D99/00; B29D99/0053; F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; F16L27/00; F16L27/10; F16L27/113; B29K; B29K2021/00; B29L; B29L2031/00; B29L2031/26; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49789; Y10T29/49796; Y10T29/49826; Y10T29/4984; Y10T29/49844; Y10T403/00; Y10T403/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING A JOINT HAVING AN OUTER PIVOT MEMBER HAVING A CYLINDRICAL INNER SURFACE, AN INNER PIVOT MEMBER HAVING A CYLINDRICAL OUTER SURFACE RADIALLY SPACED FROM AND PRESENTED TO SAID INNER SURFACE AND AN ANNULAR FLEXING SECTION BETWEEN SAID SURFACES WHICH IS STIFF IN RADIAL DIRECTIONS AS COMPARED TO THE STIFFNESS IN AXIAL OR TORSIONAL DIRECTIONS WHICH COMPRISES CONVOLUTELY WINDING AN ANNULUS OF A PLURALITY OF SUPERPOSED THIN SPIRAL CONVOLUTIONS, EACH CONVOLUTION COMPRISING AT LEAST A LAYER OF METAL AND A LAYER OF ELASTOMER, INTERRUPTING THE METAL AT ANGULARLY SPACED INTERVALS TO PERMIT INDEPENDENT TORSIONAL MOVEMENT BETWEEN THE UNINTERRUPTED SECTIONS OF THE LAYERS, BONDING TOGETHER THE CONVOLUTIONS, AND SECURING THE OUTER SURFACE OF SAID ANNULUS TO SAID CYLINDRICAL INNER SURFACE AND THE INNER SURFACE OF SAID ANNULUS TO SAID CYLINDRICAL OUTER SURFACE.
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING A JOINT HAVING AN OUTER PIVOT MEMBER HAVING A CYLINDRICAL INNER SURFACE, AN INNER PIVOT MEMBER HAVING A CYLINDRICAL OUTER SURFACE RADIALLY SPACED FROM AND PRESENTED TO SAID INNER SURFACE AND AN ANNULAR FLEXING SECTION BETWEEN SAID SURFACES WHICH IS STIFF IN RADIAL DIRECTIONS AS COMPARED TO THE STIFFNESS IN AXIAL OR TORSIONAL DIRECTIONS WHICH COMPRISES CONVOLUTELY WINDING AN ANNULUS OF A PLURALITY OF SUPERPOSED THIN SPIRAL CONVOLUTIONS, EACH CONVOLUTION COMPRISING AT LEAST A LAYER OF METAL AND A LAYER OF ELASTOMER, INTERRUPTING THE METAL AT ANGULARLY SPACED INTERVALS TO PERMIT INDEPENDENT TORSIONAL MOVEMENT BETWEEN THE UNINTERRUPTED SECTIONS OF THE LAYERS, BONDING TOGETHER THE CONVOLUTIONS, AND SECURING THE OUTER SURFACE OF SAID ANNULUS TO SAID CYLINDRICAL INNER SURFACE AND THE INNER SURFACE OF SAID ANNULUS TO SAID CYLINDRICAL OUTER SURFACE.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |