Sealing device for air rotary joint

Details Sealing device for air rotary joint Sealing device for air rotary joint

1988-05-17

1989-09-12

Chambers, A. Michael

Fluid handling

Systems

With running joint between movable parts of system

277 3, 277 59, F16L 2700

Patent

active

048650757

ABSTRACT:
In an air rotary joint supplying compressed air from an outside source through a rotating shaft to a pneumatic equipment; a sealing device for the air rotary joint, in which lubricating oil chambers partitioned by air seals are formed on both sides of an air inlet port, an inlet piping is connected to one lubricating oil chamber, a check valve for checking a counter flow of lubricating oil is installed in the inlet piping, an outlet piping is connected to the other lubricating oil chamber, and a relief valve for maintaining a hydraulic pressure in the lubricating oil chamber below a specified maximum value is installed in the outlet piping so as to prevent air leakage due to counter flow of compressed air into the lubricating oil chamber.

REFERENCES:
patent: 1722135 (1929-07-01), Frey
patent: 3088744 (1963-07-01), Ezekiel
patent: 3420434 (1969-01-01), Swearingen
patent: 3923133 (1975-12-01), Chivari
patent: 4005580 (1977-02-01), Swearingen
patent: 4010960 (1977-03-01), Mardin
patent: 4189156 (1980-02-01), Geary, Jr. et al.
patent: 4252147 (1981-02-01), Gerber et al.

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