Brakes – Plastic deformation or breakage of retarder element – Frangible element
Patent
1991-01-22
1992-09-01
Oberleitner, Robert J.
Brakes
Plastic deformation or breakage of retarder element
Frangible element
182 3, F16F 712
Patent
active
051431874
ABSTRACT:
An energy absorber for a fall protection system employing a horizontal lifeline comprises an elongate, flexible strength component to opposite ends of which is transmitted the tension shock load produced in the lifeline by arresting a fall and a plurality of sequential energy components operatively connected to the strength component, so that tension applied at opposite ends of the strength component is borne by each of the energy absorbing components and only after its predecessor has broken. The breaking strength of each energy absorbing component, which may be a linear segment of stainless steel aircraft cable, is selected not exceed a desired maximum arrest load. The number of energy absorber components is selected so that not all of them will break when the fall protection system arrests the fall of an object of a predetermined mass falling freely a predetermined distance.
REFERENCES:
patent: 3444957 (1969-05-01), Ervin
patent: 3504460 (1970-04-01), Solberg
patent: 3550957 (1970-12-01), Radke
patent: 3937407 (1976-02-01), Matsuo
patent: 4588208 (1986-05-01), Yoshitsugu
patent: 4753772 (1988-06-01), Schmertz
McQuarrie Raymond H.
Sulowski Andrew C.
Oberleitner Robert J.
Ontario Hydro
Young Lee W.
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