Measuring and testing – Testing of shock absorbing device – In situ vehicle suspension
Patent
1979-10-15
1982-02-09
Gill, James J.
Measuring and testing
Testing of shock absorbing device
In situ vehicle suspension
G01M 1900
Patent
active
043144730
ABSTRACT:
A method and apparatus for testing seismic shock absorbing snubbers in situ. Such snubbers are used in power plants in association with piping that is yieldably attached by way of pipe hangers or supports to the plant building structure. Typically, snubbers are operatively connected between the pipe and the building or other support structure. Such snubbers permit free motion of the pipe in response to slow thermal expansion or contraction of the pipe, but resist or damp rapid motion of the pipe induced by seismic shock or vibration. In a method aspect of the invention, the snubber system permits testing in situ by loosening, but not disconnecting, a connection between the snubber and the pipe (or, alternatively, between the snubber and the support structure) to permit limited motion between two relatively movable sections of the snubber, without inducing movement of the adjacent pipe; then applying a test force between the relatively movable sections of the snubber to cause relative movement therebetween to determine the operation of the snubber.
REFERENCES:
patent: 1203580 (1916-11-01), Carter
patent: 3944029 (1976-03-01), Jozuka
patent: 4192173 (1980-03-01), Ay et al.
Anchor/Darling Industries, Inc.
Gill James J.
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