Fluid coupling device

Details Fluid coupling device Fluid coupling device

1991-09-24

1993-04-20

Arola, Dave W.

Pipe joints or couplings

With leakage or drip disposal

Weep holes

285281, F16L 5500

Patent

active

052035921

ABSTRACT:
In a non-contacting fluid coupling device for feeding fluid to a hollow core of a rotating tool, one end of a hollow coupling shaft is attached in fluid communication to the shaft of the rotating tool. The other end of the coupling shaft is received, in a non-contact manner, in a hollow of a coupling main body. The coupling main body has an opening and passage in fluid communication with the hollow coupling shaft to introduce high pressure fluid to the hollow core of the rotating tool. Between the hollow of the coupling main body and the coupling shaft is at least one pressure reduction passage. Downstream of each pressure reduction passage is a pressure reduction chamber having a drain hole to the atmosphere. Downstream of the last pressure reduction chamber is a minute space between the coupling main body and the coupling shaft into which is introduced compressed air that precludes leakage of the fluid further downstream in the coupling device.

REFERENCES:
patent: 3129960 (1964-04-01), Schrodt
patent: 3889983 (1975-06-01), Freize et al.
patent: 3913952 (1975-10-01), Matsui et al.
patent: 3957294 (1976-05-01), Hoban et al.
patent: 4449739 (1984-05-01), Raether
patent: 5052720 (1991-10-01), Yoda
patent: 5058927 (1991-10-01), Miwa

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