Valve shifting mechanism for a brass instrument

Details Valve shifting mechanism for a brass instrument Valve shifting mechanism for a brass instrument

1986-06-24

1987-09-29

Rosenthal, Arnold

Valves and valve actuation

Reciprocating valve

Push or pull operator

251325, 84392, F16K 3314, F16K 3315, G10D 904

Patent

active

046964541

ABSTRACT:
In construction of a valve shifting mechanism for a brass instrument in which tube length is changed by selectively moving a piston tube in a valve casing against a spring, a valve guide made of synthetic resin is fixed, in sliding engagement with the valve casing, to a valve rod seat fixed to the piston tube by means of a piston rod screwed at one end into the piston rod seat for reduced generation of harsh noises when the valve is shifted and to simplify assemblage of the valve. An elongated slot is formed in the valve guide extending in the radial direction of the piston tube so as to permit a fixed size valve guide to be used with valve casings of different sizes.

REFERENCES:
patent: 1716917 (1929-06-01), Carlson
patent: 1922685 (1933-08-01), Johnson
patent: 3044339 (1962-07-01), Greenleaf
patent: 3911784 (1975-10-01), Shiono

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