Patent US4689527A successfully refreshed from Google Patents.
US4689527A
Expired / Lapsed
US
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Double driving device for machines
Assignee: Individual
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Filing: 1985-06-26
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Granted: 1987-08-25
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Expires: 2005-06-26
Abstract
Abstract This invention provides a double driving device which includes two motors, sharing a same common shaft or having their shafts linked together, and a control circuit. The two motors have different horse power and are used in machines, such as presses or shearing machines, which always use only one motor with less power to operate while the machines is not loaded but both of the motors while the machine is loaded so as to save the energy consumed unnecessarily during periods of no practical work. The control circuit is used to supply the intermittent operation of the motor with greater horse power.
Inventors
- 👤 Yao-Yu Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/14; B30B15/148; B30B15/16; B30B15/166; H; H02; H02P; H02P5/00; H02P5/74
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A double driving device for a machine, the device comprising: first and second motors, each motor being adapted to rotate a common shaft member; and a control circuit for operating the first and second motors individually or in combination depending upon whether the machine is in a loaded or unloaded condition, the first motor being operational when the machine is in an unloaded condition, the first and second motors being operational when the machine is in the loaded condition only.
Claim 2
Dependent Claim
80 words
A double driving device for a machine, the device comprising: first and second motors, each motor being adapted to rotate a common shaft member; and a control circuit for operating the first and second motors individually or in combination depending upon whether the machine is in a loaded or unloaded condition, the first motor being operational when the machine is in an unloaded condition, the first and second motors being operational when the machine is in the loaded condition only.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1 wherein the second motor has a power output which is greater than that of the first motor.
Claim 4
Dependent Claim
18 words
A device as claimed in claim 1 wherein the first and second motors have substantially equal power outputs.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |