Musical instrument piston valve

Details Musical instrument piston valve Musical instrument piston valve

2005-04-04

2010-02-23

Donels, Jeffrey (Department: 2832)

Music

Instruments

Automatic

C084S38700R, C084S388000, C084S391000, C084S392000

Reexamination Certificate

active

07667117

ABSTRACT:
A musical instrument piston valve receivable in a valve casing. The valve includes a valve stem, a valve barrel connected to the valve stem, and a valve guide slidably disposed with respect to the valve barrel. A spring is disposed in the valve barrel extending between the valve stem and the valve guide. A piston extends from the valve barrel and includes one or more ports. There are also various ways of adjusting the angular orientation of the piston in the valve casing. It is preferred that the piston and the valve barrel are monolithic in construction and the piston valve includes an adjustable valve guide.

REFERENCES:
patent: 911637 (1909-02-01), Adkins
patent: 1367386 (1921-02-01), Hawkins
patent: 2149714 (1939-03-01), Wornell
patent: 2404818 (1946-07-01), Swinehart
patent: 2511255 (1950-06-01), George
patent: 3044339 (1962-07-01), Greenleaf
patent: 3911784 (1975-10-01), Shiono
patent: 3973464 (1976-08-01), Novy
patent: 3990342 (1976-11-01), Reeves

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