Locking device for hard metal inserts

Details Locking device for hard metal inserts Locking device for hard metal inserts

1979-04-09

1981-06-09

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175374, 175413, 403368, 403374, 403409, E21B 1052

Patent

active

042719178

ABSTRACT:
A locking pin for sintered metal carbide inserts in tools adapted to work against hard mineral substances to minimize dislodgment of the inserts. The pin is generally cylindrical having a flat along a part of one side and circumferentially disposed ribs projecting therefrom. The pin is seated in a small bore alongside the socket in which the insert is press fitted, and is adapted to be deformed into locking engagement with the insert and with the sidewall of the bore which may be trepanned or undercut.

REFERENCES:
patent: 1578901 (1926-03-01), McCaulley
patent: 2107835 (1938-02-01), Pierce
patent: 2628821 (1953-02-01), Alexander et al.
patent: 3032152 (1962-05-01), Titsler
patent: 3311181 (1967-03-01), Fowler
patent: 3563325 (1971-02-01), Miller
patent: 3599737 (1971-08-01), Fischer
patent: 3749190 (1973-07-01), Shipman
patent: 3974621 (1976-08-01), Stang

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