Hutchinson

Paul Schwartz

Jean Thelamon

Jean-Pierre Bretaudeau

Daniel Le Guillant

The sleeve comprises two tubular rigid strength members (4,5) where one surrounds the other and where they are united by an elastomer body (6) shaped so as to co-operate therewith to form two sealed cavities (7,8) that communicate with each other via a narrow channel (9), the cavities and the channel being completely filled in a liquid, the portion of the elastomer body that defines at least one of the cavities having a generally U-shaped or V-shaped axial section that is outwardly open in a radial direction, and the narrow channel extending along an arc of a circle disposed at an axial end of the sleeve, close to its outer strength member (5). The outer strength member forms an integral portion of a rigid connection arm (11), and the narrow channel is defined in part by a radial flange (16) of a cage (15) received in the outer strength member.

Hydraulic antivibration support sleeves

A hydraulically damped bushing comprising two tubular bodies surrounding each other and joined with each other by an elastomeric member so designed as to form two sealed cavities communicating with each other by a narrow channel, the cavity-channel assembly being filled with a liquid, whereas the portion of said member which defines one of the cavities consists of a tight bellows whose edges are attached sealingly onto the external body. This bushing further comprises, within said defined cavity, a second tight bellows which is sealingly attached onto the external tubular body, the inner volume of said second bellows being vented to the open air through an aperture bored into said body.

Hydraulically damped bushings

A hydraulic antivibratory sleeve comprising two rigid tubular frames (1, 2), one surrounding the other and joined together by an elastomer body (3) shaped so as to form therewith at least two diametrically opposite sealed pockets (A, B) communicating together through a narrow channel (9), the assembly of said pockets and said narrow channel being filled with a damping liquid, the portion of the elastomer body which defines one at least of the pockets (A) having in axial section the general form of a U or a V open radially outwardly and being adhered to two rigid annular shaped sections (8) one at least of which contains the narrow channel. The mutual axial spacing of the two shaped sections (8) is provided by means of bosses (12, 15, 16) formed on the internal face of this frame (2).

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Chateaudun, France

Paul Schwartz