Cutting bed impeller

Details Cutting bed impeller Cutting bed impeller

1997-06-18

1999-08-17

Graysay, Tamara

Boring or penetrating the earth

With tool shaft detail

Helix or helically arranged structure

175324, 1753254, 166173, E21B 1044

Patent

active

059379570

ABSTRACT:
A cutting bed impeller (10) comprises a body portion and a plurality of paddles (24) projecting from the body portion, one or more of the paddles (24) having a recess (18) on its leading face in the direction of rotation of the impeller (10). The radially outer face (26) of one or more of the paddles (24) may be provided with one or more replaceable wear elements (30, 38). For example the elements may comprise nylon inserts (30) fitted into openings (28) in the radially outer faces (26) of the paddles (24).

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patent: 3420323 (1969-01-01), Owens
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patent: 4384626 (1983-05-01), Derouin
patent: 4479538 (1984-10-01), Coyle, Sr.
patent: 4489793 (1984-12-01), Boren
patent: 4540055 (1985-09-01), Drummond et al.
patent: 4757861 (1988-07-01), Klyne
patent: 4811800 (1989-03-01), Hill et al.
patent: 4854399 (1989-08-01), Zijsling
patent: 5040620 (1991-08-01), Nunley
patent: 5570742 (1996-11-01), Reynolds et al.

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