Gear box valve housing repair

Details Gear box valve housing repair Gear box valve housing repair

1994-10-19

1996-04-30

Bryant, David P.

Metal working

Method of mechanical manufacture

Repairing

2940217, 2940219, B23P 600

Patent

active

055112994

ABSTRACT:
In many complicated castings, such as those utilized to define a gear box for an aircraft jet engine, valve housings or mounting recesses may be integrally formed in the casting. Such housings incorporate a plurality of sealing surfaces which cooperate with a valve mounted therein. The repair of such sealing surfaces when worn is accomplished by machining out all bearing surfaces to a substantially larger diameter, then inserting a sleeve element which fits snugly in the newly machined bore and defines a plurality of sealing surfaces dimensionally identical with the original sealing surfaces formed in the housing.

REFERENCES:
patent: 3351043 (1967-11-01), Morrison
patent: 3750259 (1973-08-01), Timmons
patent: 4153983 (1979-05-01), Stockton
patent: 4229867 (1980-10-01), Spencer
patent: 4677723 (1987-07-01), Greene, Sr.

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