Rotary valves for brass wind instruments

Details Rotary valves for brass wind instruments Rotary valves for brass wind instruments

1990-01-19

1990-11-27

Brown, Brian W.

Music

Instruments

Wind

84452P, G10D 904

Patent

active

049727516

ABSTRACT:
A rotary valve for brass wind instruments with improved lubricating and durability properties is provided. The valve body 2 or both the valve body 2 and casing 1 of the rotary valve comprise(s) a machinable ceramic-resin composite material. The rotary valve can be readily produced by a method which comprises impregnating a machinable ceramic article containing substantially continuous micropores with a liquid resin material and hardening the resin material; machine-processing the resulting machinable ceramic-resin composite article into a shape of the valve body or shapes of the valve body and casing; and assembling the valve body into a rotary valve having the valve body 2 of the composite material rotatably contained in the casing 1 of the composite material or a metal material.

REFERENCES:
patent: 4095504 (1978-06-01), Hirsbrunner
patent: 4892786 (1990-01-01), Newkirk

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