US3242822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel redundant hydraulic actuator
Assignee: Allard Way Holdings Ltd
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Filing: 1963-12-26
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Granted: 1966-03-29
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Barltrop Richard Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:24
CPC Classifications
F; F15; F15B; F15B18/00; B; B64; B64C; B64C13/00; B64C13/24; B64C13/26; B64C13/28; B64C13/341; B64C13/38; B64C13/50; B64C13/505
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PARALLEL REDUNDANT HYDRAULIC ACTUATOR COMPRISING A PLURALITY OF PARALLEL SYSTEMS EACH INCLUDING A FIXED PRIMARY DOUBLE-ACTING HYDRAULIC CYLINDER AND A MOVABLE PRIMARY PISTON THEREIN, A SECONDARY DOUBLE-ACTING HYDRAULIC CYLINDER AND MOVABLE SECONDARY PISTON THEREIN, BOTH SAID SECONDARY CYLINDER AND SECONDARY PISTON BEING MOVABLE WITH RESPECT TO SAID FIXED PRIMARY CLYLINDER, MEANS COUPLING EACH PRIMARY PISTON AND THE RESPECTIVE SECONDARY PISTON TOGETHER SO THAT MOVEMENT OF THE ONE AFFECTS THE FORCE ACTING ON THE OTHER, AND MEANS COUPLING ALL SAID SECONDARY PISTONS TOGETHER TO PROVIDE A COMMON OUTPUT.
Claim 2
Dependent Claim
88 words
A PARALLEL REDUNDANT HYDRAULIC ACTUATOR COMPRISING A PLURALITY OF PARALLEL SYSTEMS EACH INCLUDING A FIXED PRIMARY DOUBLE-ACTING HYDRAULIC CYLINDER AND A MOVABLE PRIMARY PISTON THEREIN, A SECONDARY DOUBLE-ACTING HYDRAULIC CYLINDER AND MOVABLE SECONDARY PISTON THEREIN, BOTH SAID SECONDARY CYLINDER AND SECONDARY PISTON BEING MOVABLE WITH RESPECT TO SAID FIXED PRIMARY CLYLINDER, MEANS COUPLING EACH PRIMARY PISTON AND THE RESPECTIVE SECONDARY PISTON TOGETHER SO THAT MOVEMENT OF THE ONE AFFECTS THE FORCE ACTING ON THE OTHER, AND MEANS COUPLING ALL SAID SECONDARY PISTONS TOGETHER TO PROVIDE A COMMON OUTPUT.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |