Piston for precision dosing instrument

Details Piston for precision dosing instrument Piston for precision dosing instrument

1984-12-10

1987-01-06

Look, Edward K.

Expansible chamber devices

Piston

Nonmetallic portion

291565R, 92254, 604222, 604230, B23P 1510, F16J 102

Patent

active

046337652

ABSTRACT:
A piston for a precision dosing instrument includes a cylindrical core which may be made of glass, ceramic or metal, and a precision ground sleeve of polytetrafluorethylene disposed over the core. One end of the sleeve is closed while the core is open at both ends.

REFERENCES:
patent: 2315944 (1943-04-01), Dick
patent: 2607342 (1952-08-01), Abel
patent: 2895773 (1959-07-01), McConnaughey
patent: 3237815 (1966-03-01), Ogle
patent: 4315454 (1982-02-01), Knodel
patent: 4501192 (1985-02-01), Knodel

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