US5289902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator
Assignee: Toshiba Corp
•
Filing: 1992-10-26
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Granted: 1994-03-01
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Expires: 2012-10-26
Abstract
Abstract An elevator having a cage disposed inside guide rails, a damper unit, a vibration sensor, and a control circuit. The damper unit is controlled by the control circuit in response to vibrations of the cage which are detected by the vibration sensor. The vibration sensor detects the vibration of the cage, converts the vibration into an electric signal, and transmits the electric signal to the control circuit. The control circuit compares the electric signal with a predetermined value and controls the coefficient of viscous damping of the damper unit according to the result of the comparison. Accordingly, vibrations of the cage are absorbed and reduced, and the elevator provides a more comfortable ride.
Inventors
- 👤 Yoshiaki Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:10
CPC Classifications
B; B66; B66B; B66B1/00; B66B5/00; B66B5/28; B66B5/284; B66B7/00; B66B7/02; B66B7/04; B66B7/041; B66B7/042; B66B7/046
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
An elevator having a vertically movable cage along guide rails comprising: supporting units disposed on said cage; an operating lever pivotally mounted to said supporting units; guide rollers connected to said supporting units and disposed to touch said guide rails; damping means operatively connected to said operating level, having a variable coefficient of viscous damping, for damping vibrations of said cage; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means.
Claim 2
Dependent Claim
94 words
An elevator having a vertically movable cage along guide rails comprising: supporting units disposed on said cage; an operating lever pivotally mounted to said supporting units; guide rollers connected to said supporting units and disposed to touch said guide rails; damping means operatively connected to said operating level, having a variable coefficient of viscous damping, for damping vibrations of said cage; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means.
Claim 3
Dependent Claim
29 words
An elevator as claimed in claim 1, wherein said damping means comprises a cylinder filled with magnetic fluid, and said control means controls the viscosity of the magnetic fluid.
Claim 4
Dependent Claim
28 words
An elevator as claimed in claim 1, wherein the control means comprises an electromagnetic coil and a power supply capable of providing a current to the, electromagnetic coil.
Claim 5
Dependent Claim
25 words
An elevator as claimed in claim 1, wherein said control means comprises electrodes and a power supply capable of providing a voltage to the electrodes.
Claim 6
Dependent Claim
51 words
An elevator as claimed in claim 1, wherein said damping means comprises: a solenoid; a cylindrical electromagnetic coil disposed in said solenoid; a vertically movable orifice lever surrounded by a coil spring; and a plunger movable in said solenoid and having an orifice permitting vertical movement of said orifice lever therein.
Claim 7
Dependent Claim
24 words
An elevator as claimed in claim 5, wherein said coil spring further permits the orifice lever to be suspended in said cylindrical electromagnetic coil.
Claim 8
Dependent Claim
28 words
An elevator as claimed in claim 5, wherein said vertically movable orifice lever is movable against the action of said coil spring due to the cylindrical electromagnetic coil.
Claim 9
Dependent Claim
81 words
An elevator having a vertically movable cage along guide rails comprising: supporting units disposed on said cage; an operating lever pivotally mounted to said supporting units; guide rollers connected to said supporting units and disposed to touch said guide rails; damping means operatively connected to said operating level having a variable coefficient of viscous damping for damping vibrations of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to a measured variable.
Claim 10
Dependent Claim
81 words
An elevator having a vertically movable cage along guide rails comprising: supporting units disposed on said cage; an operating lever pivotally mounted to said supporting units; guide rollers connected to said supporting units and disposed to touch said guide rails; damping means operatively connected to said operating level having a variable coefficient of viscous damping for damping vibrations of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to a measured variable.
Claim 11
Dependent Claim
77 words
An elevator having a vertically movable cage comprising: damping means having a variable coefficient of viscous damping, for damping vibrations of said cage, said damping means comprising a cylinder filled with magnetic fluid; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means wherein said control means controls the viscosity of the magnetic fluid.
Claim 12
Dependent Claim
77 words
An elevator having a vertically movable cage comprising: damping means having a variable coefficient of viscous damping, for damping vibrations of said cage, said damping means comprising a cylinder filled with magnetic fluid; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means wherein said control means controls the viscosity of the magnetic fluid.
Claim 13
Dependent Claim
74 words
An elevator having a vertically movable cage comprising: damping means, having a variable coefficient of viscous damping, for damping vibrations of said cage; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means, wherein said control means comprises electrodes and a power supply capable of providing a voltage to the electrodes.
Claim 14
Dependent Claim
74 words
An elevator having a vertically movable cage comprising: damping means, having a variable coefficient of viscous damping, for damping vibrations of said cage; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means, wherein said control means comprises electrodes and a power supply capable of providing a voltage to the electrodes.
Claim 15
Dependent Claim
100 words
An elevator having a vertically movable cage comprising: damping means, having a variable coefficient of viscous damping, for damping vibrations of said cage, wherein said damping means comprises: a solenoid; a cylindrical electromagnetic coil disposed in said solenoid; a vertically movable orifice lever surrounded by a coil spring; and a plunger movable in said solenoid and having an orifice permitting vertical movement of said orifice lever therein; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means.
Claim 16
Dependent Claim
100 words
An elevator having a vertically movable cage comprising: damping means, having a variable coefficient of viscous damping, for damping vibrations of said cage, wherein said damping means comprises: a solenoid; a cylindrical electromagnetic coil disposed in said solenoid; a vertically movable orifice lever surrounded by a coil spring; and a plunger movable in said solenoid and having an orifice permitting vertical movement of said orifice lever therein; detecting means for detecting the vibration of said cage; and control means for controlling the coefficient of viscous damping of said damping means in response to the vibration detected by said detecting means.
Claim 17
Dependent Claim
24 words
An elevator as claimed in claim 11, wherein said coil spring further permits the orifice lever to be suspended in said cylindrical electromagnetic coil.
Claim 18
Dependent Claim
28 words
An elevator as claimed in claim 11, wherein said vertically movable orifice lever is movable against the action of said coil spring due to the cylindrical electromagnetic coil.
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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) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |