Accession Number : ADD014730

Title :   System for Limiting Snap Load Intensity.

Descriptive Note : Patent filed 11 Jul 89, patented 23 Oct 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dombrowski, James H ; Mummery, Herbert L ; Buecher, Roger W ; Yumori, Isao R

Report Date : 23 Oct 1990

Pagination or Media Count : 8

Abstract : This patent discloses a system which limits the intensity of a snap load imposed in a tether or cable, used, for example, in the recovery of an object at sea, includes a floating plate for connection to the cable and a support housing for connection to the object being recovered. The system also includes an actuatable mechanism extending between and connected to the plate and housing. The actuatable mechanism is movable from an initial position toward a deflected position in response to the introduction of a snap load in the cable caused by the occurrence of the sudden removal of a slack condition in the cable. The system further includes a hydraulic or other fluid arrangement coupled to the actuatable mechanism for generating a shock load within the mechanism in response to the introduction of the snap load in the cable which permits movement of the mechanism toward the deflected position while limiting the tensile load imposed on the cable to a known value that the cable can withstand and reducing the separation velocity toward zero. The system also includes a restoring mechanism operable for causing extension of the actuatable mechanism from the deflected position back to the initial position in response upon reintroduction of another slack condition in the cable. (JHD)

Descriptors :   *STRESS RELEIVING, *PATENTS, *LOCKING FASTENER DEVICES, CABLES, DEFLECTION, HOUSINGS, INTENSITY, SEPARATION, SHOCK(MECHANICS), TENSILE PROPERTIES, TETHERING, VELOCITY

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE