Patent US4743138A successfully refreshed from Google Patents.
US4743138A
Expired / Lapsed
US
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Device for coupling two flanged shaft ends
Assignee: Alstom SA
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Filing: 1987-04-06
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Granted: 1988-05-10
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Expires: 2007-04-06
Abstract
Abstract A coupling device for two flanged shaft ends is disclosed. A tapered pin bolt having a conical shank is employed within a complementary, internally tapered expansion sleeve having longitudinal slit. The pin bolt and sleeve extend through aligned bores provided in the flanges. The pin bolt is externally threaded on its opposite ends extending from the conical shank. A nut having an internal, axially extending and pin arrangement is mounted over each respective end of the pin bolt.
Inventors
- 👤 Pierre Goy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:44
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/16; B23; B23P; B23P11/00; B23P11/02; F; F16; F16B; F16B31/00; F16B31/04; F16D; F16D1/00; F16D1/02; F16D1/033; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7056; Y10T403/7058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
Coupling device for coupling two flanged shafts end-to-end having abutting flanges with aligned bores therein, said device comprising a cone-shaped taper pin bolt having a conical shank with opposite small and large diameter ends, an expandable cylindrical sleeve within said aligned bores and concentrically about said taper pin bolt conical shank, said sleeve having internally a conical surface matching said conical shank of the pin bolt, said pin bolt being provided with a nut and a tractive grip at each end, and an axially movable standoff provided concentrically about said pin bolt between the nut on the pin bolt and the small end of the conical shank and the sleeve, said standoff having one end bearing upon said sleeve and another end facing said nut and being urged axially toward said sleeve by means of screws traversing said nut and respectively abutting axially aligned pins contacting the other end of said standoff, and said sleeve being longitudinally slit.
Claim 2
Dependent Claim
158 words
Coupling device for coupling two flanged shafts end-to-end having abutting flanges with aligned bores therein, said device comprising a cone-shaped taper pin bolt having a conical shank with opposite small and large diameter ends, an expandable cylindrical sleeve within said aligned bores and concentrically about said taper pin bolt conical shank, said sleeve having internally a conical surface matching said conical shank of the pin bolt, said pin bolt being provided with a nut and a tractive grip at each end, and an axially movable standoff provided concentrically about said pin bolt between the nut on the pin bolt and the small end of the conical shank and the sleeve, said standoff having one end bearing upon said sleeve and another end facing said nut and being urged axially toward said sleeve by means of screws traversing said nut and respectively abutting axially aligned pins contacting the other end of said standoff, and said sleeve being longitudinally slit.
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |