Seal for a joint or juncture – Seal between relatively movable parts – Piston ring or piston ring expander or seat therefor
Patent
1998-03-17
2000-06-13
Knight, Anthony
Seal for a joint or juncture
Seal between relatively movable parts
Piston ring or piston ring expander or seat therefor
277906, 277921, 277634, 219 6911, F16J 900, F16J 300, B23H 100, B23K 900
Patent
active
060739355
ABSTRACT:
The leakproof sealing device for the lower arm of a spark erosion machine (also known as an electrical discharge machining (EDM) device) is made to fit a variety of existing spark erosion machines, each having different size windows. A slidable metal band is mounted on the outside of the tank and spans the window. Spring mounted rollers maintain tension on the metal band and allow the metal band to move from side to side across the window. A structural frame mounted external to the tank forms a leaktight seal between the tank and the band. A hole is formed in the metal band through which the lower arm of the erosion machine passes and a semi-leaktight seal is formed between the arm and the metal band.
REFERENCES:
patent: 2417482 (1947-03-01), Gacki
patent: 3891223 (1975-06-01), Sonnen
patent: 4565915 (1986-01-01), Girardin
patent: 4647747 (1987-03-01), Goto
patent: 4808786 (1989-02-01), Shinkai et al.
patent: 4918279 (1990-04-01), Babel et al.
patent: 5171955 (1992-12-01), Hosaks et al.
Knight Anthony
Ona Electro-Erosion, S.A.
Pilaud Robert L.
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