GB521657A - Improvements in and relating to the locking of a working piston adapted to be displaced in a cylinder by means of a pressure medium - Google Patents

Improvements in and relating to the locking of a working piston adapted to be displaced in a cylinder by means of a pressure medium

Info

Publication number
GB521657A
GB521657A GB34184/38A GB3418438A GB521657A GB 521657 A GB521657 A GB 521657A GB 34184/38 A GB34184/38 A GB 34184/38A GB 3418438 A GB3418438 A GB 3418438A GB 521657 A GB521657 A GB 521657A
Authority
GB
United Kingdom
Prior art keywords
cylinder
piston
rings
grooves
pressure medium
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
Application number
GB34184/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Defence and Space GmbH
Junkers Flugzeug und Motorenwerke AG
Original Assignee
Messerschmitt Bolkow Blohm AG
Junkers Flugzeug und Motorenwerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Messerschmitt Bolkow Blohm AG, Junkers Flugzeug und Motorenwerke AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of GB521657A publication Critical patent/GB521657A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Details Of Gearings (AREA)

Abstract

521,657. Locking rods. JUNKERS FLUGZEUG-UND-MOTORENWERKE AKT.-GES. Nov. 24, 1938, No. 34184. Convention date, Nov. 26, 1937. [Class 80 (iii)] [Also in Groups XXIX, XXVI, and XXXIII] In a locking arrangement of the type wherein a working piston is locked in the cylinder in which it is displaced by a pressure medium, by means of one or more locking members subjected to the influence of an auxiliary power member, particularly applicable to variable length struts for retractable landing gear of aircraft, one or more resilient expansible rings are arranged and guided in grooves in the working piston and are adapted to be maintained in locking engagement with grooves in the cylinder by one or more auxiliary pistons. In the form shown, two resilient rings 6, 7 which normally expand outwardly, are accommodated in grooves 4, 5 in the piston 2 and expand into grooves 8, 9 in the cylinder 1. The rings 6, 7 are held in the grooves 8, 9 by pins 11 which are movable radially by piston members 9<1>, 9<11> each of which is displaceable axially by a spring 10. For moving the piston 2 to the opposite end of the cylinder 1, pressure medium is admitted through port 13 to chamber 16, and passes along channels 20 to a space 18, thereby forcing the piston member 9<11> in the direction 14. The rings 6, 7 and the grooves 8, 9 are all bevelled as at 21, 22 so that, owing to the wedge action of the oblique surfaces, the axially directed force of the pressure medium on the ring 6 compresses it to such a degree that it withdraws completely from the groove 8 and the piston 2 is displaced to the other end of the cylinder 1. The resilient rings 6, 7 act as packing rings when the piston 2 moves in the cylinder 1. Instead of oblique surfaces, bell-crank levers may be used for effecting radial displacement of the resilient rings. In a modification described and illustrated in the Specification, the resilient rings normally contract inwardly.
GB34184/38A 1937-11-26 1938-11-24 Improvements in and relating to the locking of a working piston adapted to be displaced in a cylinder by means of a pressure medium Expired GB521657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE521657X 1937-11-26

Publications (1)

Publication Number Publication Date
GB521657A true GB521657A (en) 1940-05-28

Family

ID=6551442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34184/38A Expired GB521657A (en) 1937-11-26 1938-11-24 Improvements in and relating to the locking of a working piston adapted to be displaced in a cylinder by means of a pressure medium

Country Status (1)

Country Link
GB (1) GB521657A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971496A (en) * 1958-06-09 1961-02-14 Gen Motors Corp Fluid pressure actuator and cooling means therefor
US3581625A (en) * 1969-03-12 1971-06-01 Stanley Joseph Michalak Impact cylinder
US4635536A (en) * 1983-09-19 1987-01-13 Miller Fluid Power Corporation Cylinder locking apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971496A (en) * 1958-06-09 1961-02-14 Gen Motors Corp Fluid pressure actuator and cooling means therefor
US3581625A (en) * 1969-03-12 1971-06-01 Stanley Joseph Michalak Impact cylinder
US4635536A (en) * 1983-09-19 1987-01-13 Miller Fluid Power Corporation Cylinder locking apparatus

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