Shock absorber

Details Shock absorber Shock absorber

1985-09-03

1987-07-14

Halvosa, George E. A.

Brakes

Plastic deformation or breakage of retarder element

Element severed by cutting tool

73151, 267125, F16F 712

Patent

active

046796690

ABSTRACT:
A shock absorber for a wireline instrument, the shock absorber having solid, cylindrical upper body, a cylindrical sleeve, and a mandrel. The mandrel has a hexagonal upper portion, a circular center portion, and a lower nose portion. A bolt connects the mandrel to the upper body, so that the mandrel can move telescopically within the sleeve, but cannot fall out of the sleeve. Three carbide cutting elements are mounted on the sleeve adjacent to alternate sides of the upper portion of the mandrel for cutting chips of material off of the sides of the mandrel as the mandrel is moved into the sleeve.

REFERENCES:
patent: 2113856 (1938-04-01), Parks
patent: 2577599 (1951-12-01), Bethancourt
patent: 2590233 (1952-03-01), Condra
patent: 3511345 (1970-05-01), Takamatsu et al.
patent: 3653468 (1972-04-01), Marshall
patent: 3779591 (1973-12-01), Rands
patent: 4158403 (1979-06-01), Peter
patent: 4214650 (1980-07-01), Crossman et al.
patent: 4346795 (1982-08-01), Herbert

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