US2147536A - Retractable landing gear for airplanes - Google Patents
Retractable landing gear for airplanes Download PDFInfo
- Publication number
- US2147536A US2147536A US173693A US17369337A US2147536A US 2147536 A US2147536 A US 2147536A US 173693 A US173693 A US 173693A US 17369337 A US17369337 A US 17369337A US 2147536 A US2147536 A US 2147536A
- Authority
- US
- United States
- Prior art keywords
- landing gear
- airplanes
- jack
- accumulator
- retractable landing
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
- B64C25/08—Undercarriages non-fixed, e.g. jettisonable
- B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
- B64C25/18—Operating mechanisms
- B64C25/22—Operating mechanisms fluid
Definitions
- the present invention relates to the systems of valve 6 being c1csed,the pump 1 is started.
- the lifting pressure acting in the pipes 3 and later is utilized for lowering the landing gear. 3a forces the piston oi.
- the invention consists in providing the systems o the o m ow of the landing gear, 10
- a p for mal onfrom h delivery pipe 3 of th pump is adapted eration between said pump and one of the chamto place said pump in communication with the bers of J .ahydrc-pneumat1c accumulator. chamber 12' on the accumulator side of the jack a p between the other chamber of s d jack V, when the cock 1" provided on said pipe 3d, is and Said a um Safety P p branching Ofi 40 opened.
- a second cock 1 Between the branching-off point a and from d normal Operatieh P p and nect ng the chamber 0 of the jack V is a second cock 1.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Description
Feb. 14, 1939. R L 2,147,536
RETRACTABLE LANDING GEAR FOR AIRPLANES Filed Nov. 9, 1937 Patented Feb. 14, 1939 2,147,536
UNITED STATES PATENTOFFICE hen Lucien Levy, Montrohte (Seine), France, assignor to Socit dlnventions Aeronautiques g1. litliecaniques S. I. A. M., Fribourg, Switzer- Application November 9, 1937, Serial No. 173,693
In France November 10, 1936 1 Claim. (Cl. 60-52) The present invention relates to the systems of valve 6 being c1csed,the pump 1 is started. As retractable landing gear for airplanes, in which pointed out in the specification of said prior patthe action of a hydro-pneumatic energy accumucut, the lifting pressure acting in the pipes 3 and later is utilized for lowering the landing gear. 3a forces the piston oi. the jack V upwards (in the The invention is applicable, in particular, to case shown in the drawing), the effect of which 5 systems of this type which include a hydraulic is to increase the pressure in the accumulator 9, locking device and, inter alia, to the systems of the hydraulic locking device 8 then allowing liquid retractable landing gear for airplanes which are to pass from the chamber 1) into the accumulator described in applicants prior Patent No. 2,001,620. 9 as explained in said prior patent.
| The invention consists in providing the systems o the o m ow of the landing gear, 10
of airplane landing gear which utilize the action all t is e d d is f the D p the of a hydro-pneumatic energy accumulator for valve 6, so that the action of the accumulator and loweringthe landing gear, with an auxiliary-safethe r y causes h Piston 0f h J k V to ty device adapted to be brought into operation to s e i ensure the descent of the landing gear when the If, p a ra ture S ould Occur in the energy accumulated in the hydro-pneumatic ac- Pipe 30, or the accumulator 9 should, for any cumulator ceases accidentally to be available for reason, be unable t fu ti n, the Pilot p ns the that purpose, for example, in the event of a frac- 000k closes the 6001! T2 d Starts t D p 1 ture inthe pipe connecting said accumulator with Whilst actuating the ex aust valve 5. In these i t jack. circumstances, liquid under pressure is delivered 0 A combination of this auxiliary safety device into the Chamber the l D B e with the system described in the specification of valve 0, So tha e ot action of the p I said prior patent is represented diagrammatically, pplements gravity in r r to cause the landin the accompanying drawing which shows the 8 a to descend.
3 essential components of the earlier system, that It Will be understood that this Safety de ce is is t say; applicable to all systems of landing gearv in which A pump which draws t supply f mm; the action of a hydro-pneumatic accumulator is 2, a jack V for actuating the landing gear (not put into operati n for the des nt f said ear. shown), a hydro-pneumatic accumulator 9 whether said systems be, or be not provided with r municating with the jack v by way of a hydraulic a ra c ck device similar to t device 8, so
According to the present invention a branch 3d, hydraulic jack the like. a p for mal onfrom h delivery pipe 3 of th pump is adapted eration between said pump and one of the chamto place said pump in communication with the bers of J .ahydrc-pneumat1c accumulator. chamber 12' on the accumulator side of the jack a p between the other chamber of s d jack V, when the cock 1" provided on said pipe 3d, is and Said a um Safety P p branching Ofi 40 opened. Between the branching-off point a and from d normal Operatieh P p and nect ng the chamber 0 of the jack V is a second cock 1. the p p to the Other Chamber Of t jack, means The system arranged in this manner functions fer normally Placing Said Safety p p Out of the as follows: circuit of the pump, means for bringing said safe- Normally, the cock 1 is closed, and the cock r W P pe into Operation, nd an exhaustv pipe ,5
is open. branching of! from the normal operation pipe.
In order to raise the landinggear, the exhaust ENE UCIEN LEVY.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2147536X | 1936-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2147536A true US2147536A (en) | 1939-02-14 |
Family
ID=9684122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US173693A Expired - Lifetime US2147536A (en) | 1936-11-10 | 1937-11-09 | Retractable landing gear for airplanes |
Country Status (1)
Country | Link |
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US (1) | US2147536A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428684A (en) * | 1945-03-28 | 1947-10-07 | Ryan Aeronautical Co | Arresting hook retracting mechanism |
US2553952A (en) * | 1945-12-20 | 1951-05-22 | Charline Elizabeth Turner | Self-propelled vehicle |
US2578959A (en) * | 1948-10-30 | 1951-12-18 | George E Failing Supply Compan | Hydraulic system for drilling rigs |
US2741445A (en) * | 1936-08-05 | 1956-04-10 | Ralph D Weyerbacher | Apparatus for launching and arresting airplanes to and from flight |
US3263762A (en) * | 1964-03-11 | 1966-08-02 | Truman L Langager | Load weigher incorporated into hydraulic system of vehicle weighing device |
US3872670A (en) * | 1973-05-02 | 1975-03-25 | Caterpillar Tractor Co | Selectively actuatable shock absorbing system for an implement control circuit |
US5050380A (en) * | 1989-09-01 | 1991-09-24 | Kamyr Aktiebolag | Means for receiving and subsequently emptying hydraulic fluid from a hydraulic system |
US10550863B1 (en) | 2016-05-19 | 2020-02-04 | Steven H. Marquardt | Direct link circuit |
US10914322B1 (en) | 2016-05-19 | 2021-02-09 | Steven H. Marquardt | Energy saving accumulator circuit |
US11015624B2 (en) | 2016-05-19 | 2021-05-25 | Steven H. Marquardt | Methods and devices for conserving energy in fluid power production |
US11801932B2 (en) * | 2018-12-31 | 2023-10-31 | Jetzero, Inc. | Swing-arm pivot piston landing gear systems and methods |
-
1937
- 1937-11-09 US US173693A patent/US2147536A/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2741445A (en) * | 1936-08-05 | 1956-04-10 | Ralph D Weyerbacher | Apparatus for launching and arresting airplanes to and from flight |
US2428684A (en) * | 1945-03-28 | 1947-10-07 | Ryan Aeronautical Co | Arresting hook retracting mechanism |
US2553952A (en) * | 1945-12-20 | 1951-05-22 | Charline Elizabeth Turner | Self-propelled vehicle |
US2578959A (en) * | 1948-10-30 | 1951-12-18 | George E Failing Supply Compan | Hydraulic system for drilling rigs |
US3263762A (en) * | 1964-03-11 | 1966-08-02 | Truman L Langager | Load weigher incorporated into hydraulic system of vehicle weighing device |
US3872670A (en) * | 1973-05-02 | 1975-03-25 | Caterpillar Tractor Co | Selectively actuatable shock absorbing system for an implement control circuit |
US5050380A (en) * | 1989-09-01 | 1991-09-24 | Kamyr Aktiebolag | Means for receiving and subsequently emptying hydraulic fluid from a hydraulic system |
US10550863B1 (en) | 2016-05-19 | 2020-02-04 | Steven H. Marquardt | Direct link circuit |
US10914322B1 (en) | 2016-05-19 | 2021-02-09 | Steven H. Marquardt | Energy saving accumulator circuit |
US11015624B2 (en) | 2016-05-19 | 2021-05-25 | Steven H. Marquardt | Methods and devices for conserving energy in fluid power production |
US11801932B2 (en) * | 2018-12-31 | 2023-10-31 | Jetzero, Inc. | Swing-arm pivot piston landing gear systems and methods |
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