The invention belongs to the field of single-effect hydraulic cylinders. It relates to a device that makes it possible to limit the pressure in the pressurization chamber of a single-effect cylinder when the rod thereof is in a particular range of longitudinal positions of safety, while respecting the operating safety of the device, that is, in the case …

Legal parties

Inventors (applicants): Marc Anscieau, Alain Bignolais
Assignees (initial): Airbus Operations S.A.S. (Toulouse, FR)
Agents: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. (attorney)

The application was examined by Michael Leslie (USPTO dept. 3745)


  • 1. A single-effect hydraulic cylinder, comprising: …
  • 2. A cylinder according to claim 1 , further comprising: …
  • 3. A cylinder according to claim 1 , further comprising: …

International priority data

FR: 10 52330 / Mar. 30, 2010 (national)

Cited documents


  • Colley US 2893209 A, Jul. 1, 1959
  • JP 59-23107, Feb. 1, 1984
  • FR 1 124 969, Oct. 1, 1956
  • WO WO 01/74612 A1, Oct. 1, 2001
  • Gibbs US 2003/0047899 A1, Mar. 1, 2003


Brief Description of Drawings

The invention will now be described more precisely in the context of preferred embodiments, in no way limitative, represented in FIGS. 1 to 7 , wherein: FIG. 1 schematically represents …


Brief Summary

The invention relates to the field of hydraulic cylinders. More precisely, the invention relates to single-effect hydraulic cylinders with telescoping rod. In a common example of application, such cylinders are used …

Detailed Description

FIG. 1 , relating to the prior art, describes a control circuit of a single-effect telescopic cylinder (1), assigned to the displacement of a heavy mass (2) between two extreme …

More details about Single Effect Hydraulic Cylinder

Miscellaneous patent data

The known agent - Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P., the claim number 1 is selected as exemplary, particularly claims a single-effect hydraulic cylinder, comprising…, the invention is named Single Effect Hydraulic Cylinder, the assignee location is Toulouse (FR); its company is Airbus Operations S.A.S., 5 claims comprise the protection scope, includes the following drawings: Single Effect Hydraulic Cylinder, schematically, an embodiment of the invention, Schematically illustrates the configuration of the device, Schematically represents a single-effect cylinder, the patent is illustrated by 4 drawings, the assignee is categorized as a foreign company or corporation, the known inventor's name is Alain Bignolais, the recorded applicant's name is Marc Anscieau, the application publication date is Mar. 29, 2011, the grant number is 08826799 (publication number), the primary classification Selectively Usable or Positionable Working Member Controlled Vent in Chamber Wall (402) has been designated to the document, was examined by Michael Leslie, the main examiner (3745 USPTO department), the application number is 13/074,629 (U.S.), the term of the grant was extended by 699 days, 7 figures are supplied with the description, the grant date is Sep. 9, 2014 (publication date), developed by Alain Bignolais et al., similar documents are classified under facilitated by method of folding or packing, variable in area, Deployment, characterised by the transmission driving a plurality of propellers or rotors, Fluid actuated distributor motor, Rotating output shaft type, Follower type, Special measures for increasing the sensitivity of the system, controlled by varying the output of a pump with variable capacity, Torsion bar, Bomb releasing, Bomb doors, Anti-extrusion means, accelerating or decelerating the stroke, Fluid-actuated devices for displacing a member from one position to another, Gearing associated therewith, Selectively Usable or Positionable Working Member Controlled Vent in Chamber Wall (402).

Invention classification information

The invention is classified under Safety arrangements for fluid actuator systems, Applications of safety devices in fluid actuator systems, Emergency measures for fluid actuator systems, Other details, Working member overrides exhaust port (357), Power-plant nacelles, fairings, or cowlings, Locking mechanisms, Selectively Usable or Positionable Working Member Controlled Vent in Chamber Wall (402). The designated search classifications include Selectively Usable or Positionable Working Member Controlled Vent in Chamber Wall (402), Throttling, By successively controlling or controlling less than all of plural exhaust passages, Working member overrides exhaust port (357), Output means locked, positioned or released on failure of motive fluid supply means.

Patent details
Publication number 08826799
Publication date Sep. 9, 2014
Kind code B2
Application number 13/074,629
Application date Mar. 29, 2011
Application type U
Application series code 13
Extension term 699
National classification 91/357
Total number of claims 5
Exemplary claims 1
Number of drawings 4
Number of figures 7
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