US3847041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolt tensioning and nut threading arrangement
Assignee: Kloeckner Werke AG
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Filing: 1973-08-30
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Granted: 1974-11-12
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Expires: 1993-08-30
Abstract
Abstract A vessel has a flange provided with an annulus of projecting threaded bolts, and onto each of these bolts a nut is threaded which is provided on its outer periphery with an annulus of teeth and with an annular groove. A drive pinion is engageable with the teeth for rotating the respective nut so as to bring it into and out of mesh with the associated bolt and a detent is engageable in the respective groove for holding the nut when the same moves towards out-of-mesh position. A tensioning arrangement axially tensions the bolts and a lifting arrangement is provided for lifting the tensioning arrangement away from the bolt and the flange.
Inventors
- 👤 G Meschonat
- 👤 P Schungel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
B; B25; B25B; B25B29/00; B25B29/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
In an arrangement of the character described a combination comprising a vessel having a flange provided with an annulus of projecting threaded bolts; a nut threaded onto each of said bolts and having an outer periphery provided with an annulus of teeth and with an annular groove; drive means engageable with said teeth for rotating the respective nut so as to bring it into and out of mesh with the associated bolt; detent means engageable in the respective groove for holding the associated nut when the same moves towards out-of-mesh position; tensioning means for axially tensioning said bolts; and lifting means for lifting said tensioning means away from said bolts and said flange.
Claim 2
Dependent Claim
113 words
In an arrangement of the character described a combination comprising a vessel having a flange provided with an annulus of projecting threaded bolts; a nut threaded onto each of said bolts and having an outer periphery provided with an annulus of teeth and with an annular groove; drive means engageable with said teeth for rotating the respective nut so as to bring it into and out of mesh with the associated bolt; detent means engageable in the respective groove for holding the associated nut when the same moves towards out-of-mesh position; tensioning means for axially tensioning said bolts; and lifting means for lifting said tensioning means away from said bolts and said flange.
Claim 3
Dependent Claim
24 words
A combination as defined in claim 1, wherein said drive means comprises a plurality of individual drive units, one for each of said nuts.
Claim 4
Dependent Claim
40 words
A combination as defined in claim 2, wherein each of said drive units comprises a drive pinion engageable with said teeth of the associated nut, and a fluid-operated cylinder and piston unit for moving said drive pinion into such engagement.
Claim 5
Dependent Claim
27 words
A combination as defined in claim 1, wherein said drive means comprises pinion means engageable with said teeth, and rotary-field magnet means for turning said pinion means.
Claim 6
Dependent Claim
58 words
A combination as defined in claim 1, wherein said detent means comprises a plurality of detent units each associated with one of said nuts, each of said detent units having a detent member, spring means urging said detent member into engagement with the respectively associated groove, and fluid-operated means for retracting the detent member from the associated groove.
Claim 7
Dependent Claim
26 words
A combination as defined in claim 5; further comprising a support ring which is supported on said flange and on which said tensioning means is provided.
Claim 8
Dependent Claim
17 words
A combination as defined in claim 6; wherein said detent units are provided on said support ring.
Claim 9
Dependent Claim
27 words
A combination as defined in claim 6, wherein said lifting means comprises motor-driven spindles which engage said support ring for lifting the same away from said flange.
References Cited (Backward Citations)
US3162071A
Cited
US3722332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |