Supports – Pipe or cable – Extending through plate
Patent
1976-04-16
1977-08-30
Foss, J. Franklin
Supports
Pipe or cable
Extending through plate
248358R, 267153, F16C 3512
Patent
active
040449777
ABSTRACT:
An isolation mount is provided having triple spring rate capability. The mount provides a first spring rate to absorb and isolate engine shock and vibration to a first deflection limit and then a higher spring rate to a second deflection limit. If desired, a still higher spring rate above the second deflection limit is provided. The mount includes annular inner and outer bushings separated by an annular ring and a plurality of resilient supporting bushings. The ring and bushings are sized with respect to each other so that initial radial loading is taken by the plurality of resilient bushings until a first gap between the ring and the outer bushings is closed. This effectively removes the contribution of a pair of the resilient bushings to the spring rate. Thereafter, a further increase of the load will close a second gap between the ring and the inner bushing and effectively remove the remaining resilient bushing's contribution to the spring rate. The first spring rate is thus changed to a higher second spring rate. Thereafter, further deflection will result in a third spring rate higher than the second spring rate.
REFERENCES:
patent: 2245295 (1941-06-01), Piron
patent: 2614896 (1952-10-01), Pierce
patent: 2906572 (1959-09-01), Wroby
patent: 3140901 (1964-07-01), Young
patent: 3306679 (1967-02-01), Stokely
patent: 3704922 (1972-12-01), Kleinschmidt
patent: 3743365 (1973-07-01), Kato
Caterpillar Tractor Co.
Foss J. Franklin
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