SE8902101D0 - POWER WRENCH FOR TIGHTENING SCREW JOINTS - Google Patents
POWER WRENCH FOR TIGHTENING SCREW JOINTSInfo
- Publication number
- SE8902101D0 SE8902101D0 SE8902101A SE8902101A SE8902101D0 SE 8902101 D0 SE8902101 D0 SE 8902101D0 SE 8902101 A SE8902101 A SE 8902101A SE 8902101 A SE8902101 A SE 8902101A SE 8902101 D0 SE8902101 D0 SE 8902101D0
- Authority
- SE
- Sweden
- Prior art keywords
- rotor
- tightening
- power
- screw joints
- motor rotor
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/008—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with automatic change-over from high speed-low torque mode to low speed-high torque mode
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
A power wrench for two-step tightening of screw joints, comprising a housing (13), an electric motor (10) including a rotor (25), an output shaft (24) coupled to the rotor (25), and a power supply means including a power converter (11) with a variable frequency and voltage output and a current responsive power shut-off means. A retardation responsive inertia means (28) is coupled to the motor rotor (25) via a spring (32) and a cam means (29, 30) for corotation with the motor rotor (25) and for activation of a switch (12) as a certain predetermined retardation magnitude in the motor rotor (25) is exceeded. The latter is used for obtaining a fast torque interruption of the initial tightening step of the two-step tightening process, whereas the final tightening step is discontinued automatically as a predetermined current magnitude in the power supply is reached.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8902101A SE8902101L (en) | 1989-06-12 | 1989-06-12 | NUT BEARING FOR TIGHTENING SCREW TAPE |
EP19900850234 EP0403460B1 (en) | 1989-06-12 | 1990-06-11 | Power wrench for tightening screw joints |
DE1990621647 DE69021647T2 (en) | 1989-06-12 | 1990-06-11 | Motor wrench for tightening screw connections. |
JP2151754A JP2824125B2 (en) | 1989-06-12 | 1990-06-12 | Power wrench |
US07/789,428 US5155421A (en) | 1989-06-12 | 1991-11-05 | Power wrench for tightening screw joints |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8902101A SE8902101L (en) | 1989-06-12 | 1989-06-12 | NUT BEARING FOR TIGHTENING SCREW TAPE |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8902101D0 true SE8902101D0 (en) | 1989-06-12 |
SE8902101L SE8902101L (en) | 1990-12-13 |
Family
ID=20376244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8902101A SE8902101L (en) | 1989-06-12 | 1989-06-12 | NUT BEARING FOR TIGHTENING SCREW TAPE |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0403460B1 (en) |
JP (1) | JP2824125B2 (en) |
DE (1) | DE69021647T2 (en) |
SE (1) | SE8902101L (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59605901D1 (en) * | 1995-03-24 | 2000-10-26 | Marquardt Gmbh | Method and circuit arrangement for operating an electric motor |
DE29816673U1 (en) * | 1998-09-17 | 1999-10-21 | Atlas Copco Electric Tools GmbH, 71364 Winnenden | Hand-held tool |
JP6335297B2 (en) * | 2013-08-08 | 2018-05-30 | アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ | Torque supply power tool with flywheel |
WO2015018555A1 (en) * | 2013-08-08 | 2015-02-12 | Atlas Copco Industrial Technique Ab | Power tool with flywheel and gear for accelerating said flywheel |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2768546A (en) * | 1954-04-26 | 1956-10-30 | Chicago Pneumatic Tool Co | Torque control for impact wrenches |
JPS4521198Y1 (en) * | 1966-10-03 | 1970-08-24 | ||
SE348395B (en) * | 1969-07-07 | 1972-09-04 | Saab Scania Ab | |
SE461510B (en) * | 1986-11-27 | 1990-02-26 | Atlas Copco Ab | ACTIVATION ARRANGEMENTS FOR ELECTRIC SCREW CARRIER |
JPH01127280A (en) * | 1987-11-10 | 1989-05-19 | Matsushita Electric Ind Co Ltd | Screw driver |
-
1989
- 1989-06-12 SE SE8902101A patent/SE8902101L/en not_active Application Discontinuation
-
1990
- 1990-06-11 DE DE1990621647 patent/DE69021647T2/en not_active Expired - Fee Related
- 1990-06-11 EP EP19900850234 patent/EP0403460B1/en not_active Expired - Lifetime
- 1990-06-12 JP JP2151754A patent/JP2824125B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69021647D1 (en) | 1995-09-21 |
EP0403460A1 (en) | 1990-12-19 |
JPH04176574A (en) | 1992-06-24 |
SE8902101L (en) | 1990-12-13 |
EP0403460B1 (en) | 1995-08-16 |
DE69021647T2 (en) | 1996-05-02 |
JP2824125B2 (en) | 1998-11-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
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