Spring devices – Resilient shock or vibration absorber – Nonmetallic – resilient element
Patent
1991-04-01
1991-10-22
Halvosa, George E. A.
Spring devices
Resilient shock or vibration absorber
Nonmetallic, resilient element
2671415, 2671417, 267153, 267293, 248635, 280673, 384146, 384203, 384222, 403226, F16F 138
Patent
active
050588672
ABSTRACT:
A cylindrical vibration damping bushing is provided which has an outer cylinder, an inner cylinder coaxially disposed within the outer cylinder, and having a radially outwardly expanded portion in its axially central portion, a pair of vibration damping rubber members press-fitted between the outer cylinder and the inner cylinder from both ends of the outer cylinder, and a pair of inserts, each being made of a resin material having good slidability and embedded in an inside end portion of each vibration damping rubber member so that an inside end surface thereof abut on each other. Each insert has a concave surface having a configuration conforming to that of the spherical outer surface of the expanded portion of the inner cylinder to enable the inserts to be slid on the spherical outer surface of the expanded portion. Each vibration damping rubber member has a seal portion in an outside end portion thereof, which is in air tight contact with the inner cylinder for retaining a lubricant between the concave surface of each insert and the spherical outer surface of the inner cylinder whereby the outer cylinder can be freely rotated about and twistingly rocked on the spherical outer surface of the inner cylinder with a simple construction and reduced production costs.
REFERENCES:
patent: 2572215 (1951-10-01), Swart
patent: 2659619 (1953-11-01), Kishling et al.
patent: 2855232 (1958-10-01), Kozak
patent: 2881032 (1959-04-01), Connolly
patent: 4591184 (1986-05-01), Matschinsky
patent: 4767108 (1988-08-01), Tanaka et al.
Hadano Katsuya
Ueno Masato
Halvosa George E. A.
Toyoda Gosei Co,., Ltd.
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