Face shock absorber for extracting core-collecting pipes

Details Face shock absorber for extracting core-collecting pipes Face shock absorber for extracting core-collecting pipes

1990-01-04

1992-01-28

Halvosa, George E. A.

Spring devices

Friction snubber

Snubbed coil spring or ring pack

175321, 267137, 285140, 464 20, 464169, F16F 134

Patent

active

050837559

ABSTRACT:
Face shock absorber for extracting core-collecting pipes used for the drilling of solid mineral resources, which is incorporated in the drilling unit above the rock-breaking tool. It comprises a housing, the opposite ends of which are connected to a top and a bottom adapter, respectively. The top adapter is threadably connected to the top of the housing, the bottom end of which is provided with face fingers which interdigitate with the face fingers of the bottom adapter, formed in its top end. The bottom adapter is connected via an internal thread in the bottom end to a rock breaking tool inside the housing there are disposed external spring rings and internal spring rings which form a cylindrical spring pack, the top end of which is in contact with the top adapter, while its bottom end is in contact with the top face of a spacing sleeve, which is seated on the top face of a carrying collar forming part of the bottom adapter. The bottom surface of the carrying collar is in contact with the top surface of a supporting collar of an arrester sleeve, which is threadably connected at its top end by means of an internal thread to the bottom end of the top adapter.

REFERENCES:
patent: 3254508 (1966-06-01), Garrett
patent: 4494615 (1985-01-01), Jones
patent: 4765418 (1988-08-01), Ennis
patent: 4776436 (1988-10-01), Nenkov et al.

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