Safety device and method

Details Safety device and method Safety device and method

1975-10-24

1977-07-26

Britts, Ramon S.

Signals and indicators

Navigation devices

116114R, F16B 3102

Patent

active

040375161

ABSTRACT:
A safety device includes a shank anchored to a structure, a hollow, annular wafer mounted on and around the shank, a flowable material sealed within the wafer, and a stop member on the shank on a side of the wafer away from the structure, the wafer being constructed to yield at a predetermined pressure generated by relative movement between the structure and the stop to cause flowable material to flow from the wafer.
A method of determining when a predetermined pressure is established between a structure and a stop member on a shank anchored to the structure includes the placing of a hollow, annular wafer around the shank between the structure and the stop member, and expelling from the wafer a detectable flowable material in response to the reaching of a predetermined pressure between the stop member and the structure.

REFERENCES:
patent: 2572940 (1951-10-01), Lockhart
patent: 2656717 (1953-10-01), Fourmanoit
patent: 3137268 (1964-06-01), Hornwood
patent: 3285120 (1966-11-01), Kartiala

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