Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1992-01-28
1994-05-17
Oberleitner, Robert J.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
267219, F16F 1300
Patent
active
053120930
ABSTRACT:
A vibration isolator has four fluid filled variable volume load bearing chambers, with two arranged on one side of a core and the other two on the other side. The core and chambers are contained within a frame, with the chambers extending between the core and the frame, so that vibrating the core axially compresses or extends the chambers. Diagonally opposite pairs of chambers are each connected with a separate fluid track, and the two fluid tracks may be tuned to have different resonant frequencies or the same resonant frequency. The chambers are defined by elastomeric bodies which may be reinforced using a tubular shaped reinforcing element adjacent to the chamber, to help contain the pressures within the chamber without materially increasing the compression strength of the elastomeric bodies. A fluid expansion chamber communicates with the fluid envelope of the chambers and tracks through porous flow restriction elements which allow flow to or from the expansion chamber in response to temperature changes of the fluid but snub significant flow to or from the expansion chamber which may otherwise be caused by subjecting the isolator to vibrations.
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Applicant's Exhibit A, Data Sheet No. 14B, "Cajon Snubber Fittings (Gauge Protectors)" of Cajon Company, Macedonia, Ohio, dated 1974-1980, admitted prior art.
Applicant's Exhibit B, SAE Technical Paper Series 840259, "A New Generation of Engine Mounts", dated Feb. 27-Mar. 2, 1984.
Applicant's Exhibit C, SAE Technical Paper Series 851650, "Hydraulic Engine Mount Isolation", dated Sep. 23-26, 1985.
Applicant's Exhibit D, "User's Guide to the Application of Fluidlastic.RTM. Mounts" (LL-7418) by J. R. Podesta, Lord Corporation.
vol. 8, No. 76 (M-288)(1513) Apr. 9, 1984-Patent Abstract of Japan.
Banks Edwin L.
Smith Gary T.
Applied Power Inc.
Ballato Josie A.
Oberleitner Robert J.
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