US4475408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque measuring device
Assignee: Baltimore Therapeutic Equipment Co
•
Filing: 1982-06-29
•
Granted: 1984-10-09
•
Expires: 2002-06-29
Abstract
Abstract A torque measuring device is described which provides for measurement of the rotative force applied against a shaft by engaging the shaft and an electric friction brake attached to a load cell for registering the force, and a reduced friction device for allowing the brake mounting plate to return to a neutral or zero position when force has been removed from the shaft. An externally selective voltage control actuates the friction brake.
Inventors
- 👤 Douglas Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:47
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/16; G01L3/22; A; A63; A63B; A63B21/00; A63B21/005; A63B21/0056; A63B2220/00; A63B2220/50; A63B2220/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A torque measuring device for measuring the rotational force applied to a shaft comprising a rotatable disc mounted on said shaft adjacent electric friction brake means adapted to engage and restrain rotation of said disc and shaft when an electric current is applied from externally selective means for varying voltage applied to said brake means to magnetize it, said shaft being disposed so as to otherwise rotate freely within said brake means and said brake means being attached to load cell means for measuring and registering the rotational force applied thereto in response to rotational force applied to said shaft.
Claim 2
Dependent Claim
100 words
A torque measuring device for measuring the rotational force applied to a shaft comprising a rotatable disc mounted on said shaft adjacent electric friction brake means adapted to engage and restrain rotation of said disc and shaft when an electric current is applied from externally selective means for varying voltage applied to said brake means to magnetize it, said shaft being disposed so as to otherwise rotate freely within said brake means and said brake means being attached to load cell means for measuring and registering the rotational force applied thereto in response to rotational force applied to said shaft.
Claim 3
Dependent Claim
25 words
The device of claim 1 which includes means for receiving plurality of attachments on said shaft for causing said rotation and simulating differing work modes.
Claim 4
Dependent Claim
18 words
The device of claim 1 wherein said brake means includes a second disc mounted rotatably on said shaft.
References Cited (Backward Citations)
US854996A
Cited
US1991826A
Cited
US2395905A
Cited
US2493012A
Cited
US3453874A
Cited
US3338349A
Cited
US3855852A
Cited
US3734256A
Cited
US3856297A
Cited
US4235439A
Cited
US4337050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |