Claims
- 1. A pneumatically powered actuator having hydraulic control, comprising:
- a frame;
- a double-acting pneumatic actuator having a bore, a piston slidably engaged within said bore, and a control rod connected to said piston, said double-acting pneumatic actuator mounted to said frame;
- a first double-acting hydraulic actuator having a bore, a piston slidably engaged within said bore, a follower rod mounted to said piston, and first and second fluid ports, said first double-acting hydraulic actuator mounted to said frame, said follower rod fixedly connected to said control rod, the maximum translation of said piston within said bore of said first double-acting hydraulic actuator providing a volumetric displacement V.sub.1 ;
- a second double-acting hydraulic actuator having a bore, a piston slidably engaged within said bore, an output rod mounted to said piston, and third and fourth fluid ports, the maximum translation of said piston within said bore of said second double-acting hydraulic actuator providing a volumetric displacement V.sub.2, where V.sub.2 =V.sub.1 ;
- a first fluid conduit operably coupled between said first and third fluid ports;
- a second fluid conduit;
- a valve circuit operably coupled in series with said second fluid conduit to form a fluid control conduit operably coupled between said second and fourth fluid ports; and
- a volume of hydraulic fluid filling said bore of said first double-acting hydraulic actuator, said second double-acting hydraulic actuator, said first and second fluid conduits, and said valve circuit.
- 2. The pneumatically powered actuator of claim 1, wherein said valve circuit includes:
- a throttle valve.
- 3. The pneumatically powered actuator of claim 1 wherein said valve circuit includes:
- a solenoid actuated on/off valve.
- 4. The pneumatically powered actuator of claim 1 wherein said valve circuit includes:
- a throttle valve; and
- a solenoid actuated on/off valve in series with said throttle valve.
- 5. The pneumatically powered actuator of claim 1 wherein said valve circuit includes:
- a servo-valve.
STATEMENT OF GOVERNMENT INTEREST
The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
US Referenced Citations (7)
Non-Patent Literature Citations (2)
Entry |
Thesis: Modeling and Control of a Novel Robotic Actuator, by J. D. Ingram,r.; Defense Technical Information Center Accession, No. ADA205102; Dec. 1988. |
Progress Report: Conceptual Design & Analysis of a Novel Actuator, by H. R. Everette et al., NPS-69-88-011; Defense Technical Information Center Accession, No. ADA2011010; Oct. 1988. |