Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1988-08-05
1989-12-12
Oberleitner, Robert J.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
248636, 267219, F16F 910
Patent
active
048862533
ABSTRACT:
A compact hydraulic mount is provided for mounting a vehicle engine, transmission or the like to a vehicle frame. The mount includes a substantially cylindrical elastomeric hollow body defining a primary or core hydraulic chamber. An approximately 270.degree. portion of the cylindrical outer periphery of the hollow body is surrounded and supported by a retainer cylinder. The hollow body additionally includes an integral secondary hydraulic chamber molded within the elastomeric wall. A portion of the retainer is inwardly, radially offset and separates the primary chamber from the secondary or peripheral chamber. The outside wall of the elastomeric body at the secondary chamber forms a resilient diaphragm. An orifice track is provided within the body to allow damping fluid communication between the primary and secondary hydraulic chambers. This flow of damping fluid between the chambers provides the damping action of the mount. A domed wall of the body includes an annular section for flexing in response to vibration or similar external forces. Fluid is thus forced through the orifice track and into the secondary chamber. Due to the retainer, the elastomeric body is prevented from appreciably deforming radially outwardly. This assures maximum damping fluid flow between chambers as the body is compressed. The diaphragm forming a part of the secondary hydraulic chamber is free to expand radially. The damping characteristic of the mount is relatively soft.
REFERENCES:
patent: 4262886 (1981-04-01), Le Salver et al.
patent: 4277056 (1981-07-01), Ticks
patent: 4383679 (1983-05-01), Kakimoto
patent: 4418895 (1983-12-01), Bertin et al.
patent: 4458888 (1984-07-01), Wolf et al.
patent: 4588173 (1986-05-01), Gold et al.
General Motors Corporation
Graham Matthew L.
Oberleitner Robert J.
Phillips Ronald L.
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