Patent US5152046A successfully refreshed from Google Patents.
US5152046A
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US
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Fastener tightening method
Assignee: Sanyo Machine Works Ltd
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Filing: 1991-08-19
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Granted: 1992-10-06
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Expires: 2011-08-19
Abstract
Abstract There is disclosed a constant-speed, fastener tightening method using a nut runner for setting the final tightened state of the fastener in terms of tightening torque, characterized in that the fastener is tightened by maintaining the rotative speed of the nut runner at a constant speed regardless of variations in tightening loads.
Inventors
- 👤 Tetsuo Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:32
CPC Classifications
B; B23; B23P; B23P19/00; B23P19/04; B23P19/06; B23P19/065; B23P19/066; B25; B25B; B25B23/00; B25B23/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49764; Y10T29/49766
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
A fastener tightening method for preventing variation of an axial force within a fastener comprising the steps of: rotating a fastener at a constant rotational speed to maintain a constant coefficient of friction between said fastener and a workpiece regardless of variations in tightening loads; and stopping the rotation of the fastener when a predetermined torque value is obtained.
Claim 2
Dependent Claim
59 words
A fastener tightening method for preventing variation of an axial force within a fastener comprising the steps of: rotating a fastener at a constant rotational speed to maintain a constant coefficient of friction between said fastener and a workpiece regardless of variations in tightening loads; and stopping the rotation of the fastener when a predetermined torque value is obtained.
Claim 3
Dependent Claim
69 words
A fastener tightening method for preventing variation of an axial force within a fastener comprising the steps of: rotating a fastener at a constant rotational speed regardless of variations in tightening loads, wherein said constant rotational speed is maintained from an initial period of tightening the fastener to a final period of tightening the fastener; and stopping the rotation of the fastener when a predetermined torque value is obtained.
Claim 4
Dependent Claim
69 words
A fastener tightening method for preventing variation of an axial force within a fastener comprising the steps of: rotating a fastener at a constant rotational speed regardless of variations in tightening loads, wherein said constant rotational speed is maintained from an initial period of tightening the fastener to a final period of tightening the fastener; and stopping the rotation of the fastener when a predetermined torque value is obtained.
Claim 5
Dependent Claim
68 words
A fastener tightening method for preventing variation of an axial force within a fastener comprising the steps of: rotating a fastener at a constant rotational speed regardless of variations in tightening loads, wherein said constant rotational speed is maintained from when a snug point is passed until a final period of tightening the fastener; and stopping the rotation of the fastener when a predetermined torque value is obtained.
Claim 6
Dependent Claim
68 words
A fastener tightening method for preventing variation of an axial force within a fastener comprising the steps of: rotating a fastener at a constant rotational speed regardless of variations in tightening loads, wherein said constant rotational speed is maintained from when a snug point is passed until a final period of tightening the fastener; and stopping the rotation of the fastener when a predetermined torque value is obtained.
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) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |