Patent US4282467A successfully refreshed from Google Patents.
US4282467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controller system for rotary actuator
Assignee: Ex-Cell-O Corp
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Filing: 1979-09-28
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Granted: 1981-08-04
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Expires: 1999-09-28
Abstract
Abstract This invention relates to the hydraulic control field wherein an electronic controller provides the necessary electrical elements for controlling the movement of an actuator shaft from one pre-selected position to another pre-selected position at a pre-selected velocity and provided with an automatic timing control circuit to sustain the movement or a manual operation to selectively move the actuator. The pre-selected positions and velocities are adjustable over the full range of actuator movement and velocity limit of the hydraulics.
Inventors
- 👤 William G. Gruesbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:13
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
An actuator system comprising an actuator means having a position feedback means attached thereto, a servo valve means, a servo valve amplifier means, a first summing means having a position error input and a velocity control input, a position error amplifier feeding said first summing means, a second summing means feeding said position error amplifier means, and the improvement comprising an electrical controller means having means for selectively setting and continuously controlling a first position control signal, mixing said position control signal with a signal from said position feedback means in said second summing means and feeding this difference signal into said position error amplifier means, means for selectively setting and controlling a second position control signal, means for selectively setting and controlling a first velocity control signal and feeding said velocity control signal into said first summing means, means for selectively setting and controlling a second velocity control signal, mode selection and control means for simultaneously selecting said first position signal and said first velocity signal and automatically selecting said second position signal and said second velocity signal for moving from a first actuator position to a second actuator position and means to maintain said second actuator position.
Claim 2
Dependent Claim
199 words
An actuator system comprising an actuator means having a position feedback means attached thereto, a servo valve means, a servo valve amplifier means, a first summing means having a position error input and a velocity control input, a position error amplifier feeding said first summing means, a second summing means feeding said position error amplifier means, and the improvement comprising an electrical controller means having means for selectively setting and continuously controlling a first position control signal, mixing said position control signal with a signal from said position feedback means in said second summing means and feeding this difference signal into said position error amplifier means, means for selectively setting and controlling a second position control signal, means for selectively setting and controlling a first velocity control signal and feeding said velocity control signal into said first summing means, means for selectively setting and controlling a second velocity control signal, mode selection and control means for simultaneously selecting said first position signal and said first velocity signal and automatically selecting said second position signal and said second velocity signal for moving from a first actuator position to a second actuator position and means to maintain said second actuator position.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 having means for setting and controlling the acceleration and deceleration for moving from said first preselected position to said second preselected position.
Claim 4
Independent Claim
31 words
The apparatus of claims 1 or 2 having means for automatically moving from said first actuator position to said second actuator position and reciprocate between them at a predetermined time interval.
Claim 5
Independent Claim
20 words
The apparatus of claims 1, 2 or 3 wherein said actuator is a rotary actuator having less than 360° rotation.
Claim 6
Dependent Claim
21 words
The apparatus of claim 1, 2 or 3 wherein said actuator is a linear actuator having a variable bi-direction shaft movement.
Claim 7
Dependent Claim
178 words
An actuator system comprising an actuator means having a position feedback means attached thereto, a servo valve means, a servo valve amplifier means, a first summing means having a position error input and a velocity control input, a position error amplifier feeding said first summing means, a second summing means feeding said position error amplifier means, and the improvement comprising an electrical controller means having means for selectively setting and continuously controlling a plurality of position control signals, mixing each position control signal with a signal from said position feedback means in said second summing means and feeding this difference signal into said position error amplifier means, means for selectively setting and controlling a plurality of velocity control signals and feeding each velocity control signal into said first summing means, mode selection and control means for simultaneously selecting a particular set of position control and velocity control signals for continuously maintaining said position and means for automatically selecting another set of position control and velocity control signals and means for continuously holding said actuator in said new position.
Claim 8
Dependent Claim
178 words
An actuator system comprising an actuator means having a position feedback means attached thereto, a servo valve means, a servo valve amplifier means, a first summing means having a position error input and a velocity control input, a position error amplifier feeding said first summing means, a second summing means feeding said position error amplifier means, and the improvement comprising an electrical controller means having means for selectively setting and continuously controlling a plurality of position control signals, mixing each position control signal with a signal from said position feedback means in said second summing means and feeding this difference signal into said position error amplifier means, means for selectively setting and controlling a plurality of velocity control signals and feeding each velocity control signal into said first summing means, mode selection and control means for simultaneously selecting a particular set of position control and velocity control signals for continuously maintaining said position and means for automatically selecting another set of position control and velocity control signals and means for continuously holding said actuator in said new position.
Claim 9
Dependent Claim
26 words
The apparatus of claim 6 having a means for setting and controlling the acceleration and deceleration for moving from one said preselected set position to another.
Claim 10
Independent Claim
21 words
The apparatus of claims 6 or 7 having means for automatically moving from said one set of said positions to another.
Claim 11
Dependent Claim
19 words
The apparatus of claim 1 or 6 having means for selecting and controlling said actuator movement by external means.
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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |