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US 5,855,352 AGranted
Hydraulic antivibration support
AssigneeHutchinson
InventorsAlain Bellamy, Denis Reh, Pascal Petit
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AssigneeHutchinson
InventorsAlain Bellamy, Denis Reh, Pascal Petit
Estimating the term…
A hydraulic antivibration support comprising first and second rigid strength members (1, 2) in the form of a plate, and a bell-shaped elastomer body (3, 4) interconnecting the two rigid strength members and forming a working chamber (A) therebetween, and a compensation chamber (B) connected to the working chamber via a narrow channel (C) filled with liquid like the chambers. A hole (13) pierced in the plate is sealed by a flexible decoupling membrane (14) whose periphery is bonded to the rim of the hole by vulcanization.
Hydraulic antivibration supports designed to be interposed between two rigid elements in order to damp vibratory motion between the two rigid elements, essentially along a main vibration direction (Z), the support comprising first and second rigid strength members (1, 2) suitable for securing to respective ones of the two rigid elements to be united, and an elastomer body (3) having a thick wall (4) interconnecting the two rigid strength members and partially defining a working chamber (A), said thick wall being substantially bell-shaped, extending along the main vibration direction between a peripheral base (4.sub.1) secured to the second strength member (2) and a crown secured to the first strength member (1), said elastomer body further including a freely-deformable thin wall (5) which is integrally formed with the above-mentioned thick wall and which partially defines a compensation chamber (B) that is in communication with the working chamber via a narrow channel (C), the two chambers and the narrow channel being filled with a liquid, the second strength member (2) being a base plate which extends in a general plane that is substantially perpendicular to the main vibration direction and which has a "support" face secured in sealed manner with the elastomer body to co-operate therewith in defining the two chambers and the narrow channel, the hydraulic antivibration support being characterized in that the base plate (2) is pierced by a hole having a rim and (13) in communication with the atmosphere and facing the working chamber, the hole being closed in sealed manner by a flexible membrane (14) made of elastomer whose periphery is intimately bonded to the rim of the hole, the membrane being reinforced by a web (15) made of non-deformable material that limits the displacement amplitude thereof.
A support according to any preceding claim, characterized in that the rim of the hole (13) is shaped, in particular by bevelling, so as to provide a membrane-receiving seat (17) which is not entirely cylindrical.
A support according to any preceding claim, characterized in that the periphery of the membrane (14) is extended by at least one lip (18, 19) that overlaps the rim of the hole (13).
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
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Units of the bushing type , i.e. loaded predominantly radially: characterised by features of flexible walls of equilibration chambers; decoupling…
With a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin , i.e. bushing-type: comprising means for modifying…
The damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper: the plastics spring…
The wall being at least in part formed by a flexible membrane or the like: characterised by features of partitions between two working chambers
Term ended 23 Jun 2017 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The invention relates to hydraulic antivibration supports designed to be interposed for damping and connection purposes between two rigid elements such as the chassis and the engine of a vehicle, in order to damp vibratory motion between the two rigid elements, essentially along a main vibration direction.
More particularly, the invention relates to an antivibration support of this type, comprising first and second rigid strength members suitable for securing to respective ones of the two rigid elements to be united, and an elastomer body having a thick wall interconnecting the two rigid strength members and partially defining a working chamber, said thick wall being substantially bell-shaped, extending along the main vibration direction between a peripheral base secured to the second strength member and a crown secured to the first strength member, said elastomer body further including a freely-deformable thin wall which is integrally formed with the above-mentioned thick wall and which partially defines a compensation chamber that is in communication with the working chamber via a narrow channel, the two chambers and the narrow channel being filled with a liquid, the second strength member being a base plate which extends in a general plane that is substantially perpendicular to the main vibration direction and which has a "support" face secured in sealed manner with the elastomer body to co-operate therewith in defining the two chambers and the narrow channel.
Such a device is described in document EP-A-0 236 199, for example.
Other characteristics and advantages of the invention appear from the following description of several embodiments thereof, given by way of non-limiting example, and with reference to the accompanying drawings.
In the drawings:
FIG. 1 is a section view of an embodiment of the invention, the section being on line I--I of FIG. 2;
The antivibration support shown in FIGS. 1 to 3 comprise two rigid metal strength members 1 and 2 which are interconnected by an elastomer body 3.
The first strength member 1 is tubular in the example shown, having a longitudinal axis X. More generally, the first strength member 1 may be in the form of an elongate member that is solid or hollow, and of section that is circular or otherwise.
The second strength member 2 is a plate referred to below as a base plate, which is generally plane in shape, at least in part, and which extends parallel to the axis X of the first strength member.