Patent US3566993A successfully refreshed from Google Patents.
US3566993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active vibration isolator for flexible bodies
Assignee: National Aeronautics and Space Administration
•
Filing: 1969-03-26
•
Granted: 1971-03-02
•
Expires: 1989-03-26
Abstract
Abstract This disclosure is related to an active vibration control arrangement for isolating a flexible body from disturbances applied either externally or internally by inertial or other forces created by the body itself, and consists of an actuator having a movable element drivingly connected to the flexible body, controlled by a signal produced by excitatory reaction of the body together with means to produce a nullifying movement of the movable member in response to the signal.
Inventors
- 👤 Jack D Leatherwood
- 👤 David G Stephens
- 👤 Gray V Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:38
CPC Classifications
F; F42; F42B; F42B15/00; F42B15/08; F16; F16F; F16F15/00; F16F15/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
An isolator system to isolate a flexible body from disturbances causing objectionable movement of said flexible body comprising: actuator means having a movable member connected to said flexible body mass, control means causing said actuator movable member to move to oppose responsive movement of said flexible body to disturbances; said control means including means for applying a force to said movable member and including sensor means producing a signal corresponding to the Movement of said mass member when said mass member responds to a disturbance and also including means for applying said force in response to said signal and in a manner indicated by said signal to oppose said movement; and compensation means eliminating the response of said movable member to sensor signals corresponding to steady and very low frequency mass member response.
Claim 2
Dependent Claim
133 words
An isolator system to isolate a flexible body from disturbances causing objectionable movement of said flexible body comprising: actuator means having a movable member connected to said flexible body mass, control means causing said actuator movable member to move to oppose responsive movement of said flexible body to disturbances; said control means including means for applying a force to said movable member and including sensor means producing a signal corresponding to the Movement of said mass member when said mass member responds to a disturbance and also including means for applying said force in response to said signal and in a manner indicated by said signal to oppose said movement; and compensation means eliminating the response of said movable member to sensor signals corresponding to steady and very low frequency mass member response.
Claim 3
Dependent Claim
127 words
An isolator system to isolate a flexible body from disturbances causing objectionable movement of said flexible body comprising: actuator means having a movable member connected to said flexible body mass, control means causing said actuator movable member to move to oppose responsive movement of said flexible body to disturbances; said control means including means for applying a force to said movable member and including sensor means producing a signal corresponding to the movement of said mass member when said mass member responds to a disturbance and also including means for applying said force in response to said signal and in a manner indicated by said signal to oppose said movement; and control loop means limiting the travel of said movable member to a predetermined constant maximum value.
Claim 4
Dependent Claim
127 words
An isolator system to isolate a flexible body from disturbances causing objectionable movement of said flexible body comprising: actuator means having a movable member connected to said flexible body mass, control means causing said actuator movable member to move to oppose responsive movement of said flexible body to disturbances; said control means including means for applying a force to said movable member and including sensor means producing a signal corresponding to the movement of said mass member when said mass member responds to a disturbance and also including means for applying said force in response to said signal and in a manner indicated by said signal to oppose said movement; and control loop means limiting the travel of said movable member to a predetermined constant maximum value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |