GB565579A - Improvements in and relating to hydraulically-operated variable-pitch screws - Google Patents
Improvements in and relating to hydraulically-operated variable-pitch screwsInfo
- Publication number
- GB565579A GB565579A GB387443A GB387443A GB565579A GB 565579 A GB565579 A GB 565579A GB 387443 A GB387443 A GB 387443A GB 387443 A GB387443 A GB 387443A GB 565579 A GB565579 A GB 565579A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- pump
- pitch
- cylinder
- hydraulically
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/38—Blade pitch-changing mechanisms fluid, e.g. hydraulic
- B64C11/42—Blade pitch-changing mechanisms fluid, e.g. hydraulic non-automatic
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
565,579. Controlling variable-pitch propellers. BISHOP, J. L. H., and HOLBERTON, B. V. March 10, 1943, No. 3874. [Class 135] A hydraulically-operated variable-pitch propeller installation comprises the combination with a hydraulic pump and a double-acting cam operative to adjust the blades in either direction and controlled by a governor-actuated valve of a relief according to the pressure existing in a part of the hydraulic system which is open to the coarse-pitch end of the hydraulic cylinder. As shown in the Fig., the blades 10 are adjusted by a cylinder 15 movable over a stationary piston 16 under the control of a valve 29 actuated by a governor 33 adjustably loaded by a spring 34. Motive fluid is supplied by an engine-driven pump 22 and a pump 25 driven from a source other than the engine. The pump 22 is provided with a by-passing relief valve 40 comprising a valve member 39 carried by a tubular stem 42 slidably mounted in the casing and provided with a flange 44. The flange engages the wall of the casing to provide an annular loading chamber 45 connected by a pipe 46 leading to a pipe 38 connecting the control valve with the coarse pitch side of the cylinder 15. A loading spring 47 is also arranged in the annular chamber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB387443A GB565579A (en) | 1943-03-10 | 1943-03-10 | Improvements in and relating to hydraulically-operated variable-pitch screws |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB387443A GB565579A (en) | 1943-03-10 | 1943-03-10 | Improvements in and relating to hydraulically-operated variable-pitch screws |
Publications (1)
Publication Number | Publication Date |
---|---|
GB565579A true GB565579A (en) | 1944-11-16 |
Family
ID=9766503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB387443A Expired GB565579A (en) | 1943-03-10 | 1943-03-10 | Improvements in and relating to hydraulically-operated variable-pitch screws |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB565579A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2626669A (en) * | 1948-07-08 | 1953-01-27 | Gen Motors Corp | Propeller control |
US2636566A (en) * | 1948-01-23 | 1953-04-28 | United Aircraft Corp | Governor valve for variable pitch propellers |
US3228480A (en) * | 1961-11-09 | 1966-01-11 | Hundested Motorfabrik Aktiesel | Adjusting device for adjusting the pitch of propeller blades |
-
1943
- 1943-03-10 GB GB387443A patent/GB565579A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2636566A (en) * | 1948-01-23 | 1953-04-28 | United Aircraft Corp | Governor valve for variable pitch propellers |
US2626669A (en) * | 1948-07-08 | 1953-01-27 | Gen Motors Corp | Propeller control |
US3228480A (en) * | 1961-11-09 | 1966-01-11 | Hundested Motorfabrik Aktiesel | Adjusting device for adjusting the pitch of propeller blades |
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