US4265109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrench with angular rotation readout
Assignee: C PLATH KG A CORP OF GERMANY
•
Filing: 1979-10-10
•
Granted: 1981-05-05
•
Expires: 1999-10-10
Abstract
Abstract A wrench is disclosed which provides a readout of its angle of rotation by means of an inertial body mounted in a housing affixed to the wrench. Manual and automatic means are provided for determining the rotation of the housing with respect to the body.
Inventors
- 👤 Hans-Dieter Hallbauer
- 👤 Fritz G. H. Gast
- 👤 Klaus-Werner Hoenow
- 👤 Armin Rahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:49
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/142; B25B23/1422; B25B23/1427; G; G01; G01L; G01L5/00; G01L5/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A tool comprising: tool means for applying a rotational force to a workpiece; a housing mounted on the tool means; an inertial body mounted for rotation in the housing, the body having a high moment of inertia with respect to the frictional moment of its mounting so that the angular orientation of the inertial body with respect to a fixed reference will not be substantially changed by rotation of the tool means about the axis of rotation of the workpiece; brake means for selectively restricting rotation of the inertial body within the housing; torque means for determining the torque applied by the tool means to the workpiece; and means responsive to the torque means for deactivating the brake means to allow rotation of the inertial body when the torque reaches a preselected value.
Claim 2
Dependent Claim
133 words
A tool comprising: tool means for applying a rotational force to a workpiece; a housing mounted on the tool means; an inertial body mounted for rotation in the housing, the body having a high moment of inertia with respect to the frictional moment of its mounting so that the angular orientation of the inertial body with respect to a fixed reference will not be substantially changed by rotation of the tool means about the axis of rotation of the workpiece; brake means for selectively restricting rotation of the inertial body within the housing; torque means for determining the torque applied by the tool means to the workpiece; and means responsive to the torque means for deactivating the brake means to allow rotation of the inertial body when the torque reaches a preselected value.
Claim 3
Dependent Claim
23 words
The tool claimed in claim 1 wherein the brake means includes: means for distorting the housing to restrict rotation of the inertial body
Claim 4
Dependent Claim
33 words
The tool claimed in claim 1, further comprising: readout means to detect rotation of the housing with respect to the inertial body; and means to indicate the detection of a preselected angular rotation.
Claim 5
Dependent Claim
110 words
An improved tool for applying rotational force to a work piece of the type having an inertial body mounted for rotation in a housing, wherein the improvement comprises: torque means for indicating when a preselected torque has been applied by the tool to the work piece; means for indicating when a preselected angular rotation of the housing with respect to the body has been achieved after indication that the preselected torque has been applied; brake means for selectively restricting rotation of the inertial body with respect to the housing; and means responsive to the torque means for deactivating the brake means upon indication that the preselected torque has been applied.
Claim 6
Dependent Claim
110 words
An improved tool for applying rotational force to a work piece of the type having an inertial body mounted for rotation in a housing, wherein the improvement comprises: torque means for indicating when a preselected torque has been applied by the tool to the work piece; means for indicating when a preselected angular rotation of the housing with respect to the body has been achieved after indication that the preselected torque has been applied; brake means for selectively restricting rotation of the inertial body with respect to the housing; and means responsive to the torque means for deactivating the brake means upon indication that the preselected torque has been applied.
References Cited (Backward Citations)
US2734412A
Cited
US3011264A
Cited
US1294710A
Cited
US2889729A
Cited
US3392678A
Cited
US3568329A
Cited
US3962910A
Cited
US4091664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |