Rotary damper
First Claim
1. A rotary damper, of the type comprising a stator and a rotor defining between them a main chamber filled with a fluid, at least substantially radial blades being disposed on each of said stator and rotor, said blades disposed in the stator, respectively on the rotor, dividing said main chamber into a plurality of volumes, and the free ends of the blades disposed on the rotor, respectively of the stator, defining laminating passages in cooperation with portions, in facing relationship, of the surface included between two blades of the stator, respectively of the rotor, said damper further comprising an auxiliary chamber which communicates with said main chamber and which is formed by at least an enclosure defined between one of the extreme faces of said damper and an elastically deformable diaphragm associated to said extreme face, said elastically deformable diaphragm being sealingly fixed both to said rotor and to said stator.
1 Assignment
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Accused Products
Abstract
A rotary damper comprises a stator and a rotor which are co-axial, circular and cylindrical, two extreme faces substantialy transversal to the axis of the stator and rotor and disposed respectively on either side of the stator and rotor, a main chamber filled with a fluid, defined between the extreme faces and the stator and the rotor, blades disposed on the stator and rotor and dividing the main chamber is a plurality of volumes, the blades laminating the flow of fluid through the different volumes of the main chamber, and an auxiliary chamber which communicates with the main chamber. The auxiliary chamber is at least partly formed by a diaphragm which is elastically deformable and which is designed to compensate for the volume variations of the fluid as a function of its temperature, and to bring in, if necessary, a twisting stiffness in parallel to the damping function. The rotary damper finds application for example in vehicle suspensions.
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Citations
14 Claims
- 1. A rotary damper, of the type comprising a stator and a rotor defining between them a main chamber filled with a fluid, at least substantially radial blades being disposed on each of said stator and rotor, said blades disposed in the stator, respectively on the rotor, dividing said main chamber into a plurality of volumes, and the free ends of the blades disposed on the rotor, respectively of the stator, defining laminating passages in cooperation with portions, in facing relationship, of the surface included between two blades of the stator, respectively of the rotor, said damper further comprising an auxiliary chamber which communicates with said main chamber and which is formed by at least an enclosure defined between one of the extreme faces of said damper and an elastically deformable diaphragm associated to said extreme face, said elastically deformable diaphragm being sealingly fixed both to said rotor and to said stator.
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13. A vehicle suspension comprising at least one deformable rigid element cooperating at its two ends with bearings fast with a vehicle chassis and coupled, towards its middle part, to an axle carrying at least one wheel, wherein said suspension comprises a rotary damper, of the type comprising a stator and a rotor defining between them a main chamber filled with a fluid, at least substantially radial blades being disposed on each of said stator and rotor, said blades disposed in the stator, respectively on the rotor, dividing said main chamber into a plurality of volumes, and the free ends of the blades disposed on the rotor, respectively of the stator, defining laminating passages in cooperation with portions, in facing relationship, of the surface included between two blades of the stator, respectively of the rotor, said damper further comprising an auxiliary chamber which communicates with said main chamber and which is formed by at least an enclosure defined between one of the extreme faces of said damper and an elastically deformable diaphragm associated to said extreme face, said elastically deformable diaphragm being sealingly fixed both to said rotor and to said stator.
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14. Hand-operated control comprising a control handle fast with a shaft and of which the angular displacement is representative of an output signal piloting a member, wherein said control comprises a rotary damper which is mounted on said shaft, and said rotary damper is of the type comprising a stator and a rotor defining between them a main chamber filled with a fluid, at least substantially radial blades being disposed in the stator, respectively on the rotor, dividing said main chamber into a plurality of volumes, and the free ends of the blades disposed on the rotor, respectively of the stator, defining laminating passages in cooperation with portions, in facing relationship, of the surface included between two blades of the stator, respectively of the rotor, said damper further comprising an auxiliary chamber which communicates with said main chamber and which is formed by at least an enclosure defined between one of the extreme faces of said damper and an elastically deformable diaphragm associated to said extreme face, said elastically deformable diaphragm being sealingly fixed both to said rotor and to said stator.
Specification