The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 1992
Filed:
May. 16, 1990
Bernard Jampy, Fuveau, FR;
Claude Bietenhader, Lambesc, FR;
Bernard Plissonneau, Aix-en-Provence, FR;
Aerospatiale Societe Nationale Industrielle S.A., Paris, FR;
Abstract
The invention relates to a device for reducing the damping flexibility of a suspension shock absorber for an undercarriage, in particular the main undercarriage of a helicopter, and a shock absorber and an undercarriage including it. The shock absorber is of the oleo-pneumatic type, and at least one of the incompressible and compressible fluids of the shock absorber is at least partially transferred from an expansion chamber (31) of the latter into a transfer chamber (42) of an accumulator (40) external to the shock absorber (1, 8), and in which the transfer chamber (42) is isolated from a return chamber (43) by a separating piston (41). The connection between the transfer chamber (42) and the corresponding expansion chamber (31) can be cut off by an electro-valve (44), in order to isolate the shock absorber (1, 8) from at least part of the low pressure gas chamber (34) of its expansion chamber (31). Application to the undercarriage equipment, in particular the main undercarriages of ship-borne helicopters.