Expansible chamber devices – Fluid conduit in constant communication with relatively...
Patent
1978-11-27
1981-02-10
Jillions, John M.
Expansible chamber devices
Fluid conduit in constant communication with relatively...
91420, 279 4, 308 363, F15B 1108, F15B 1304, B23B 3130
Patent
active
042494591
ABSTRACT:
Journalled in a peripheral groove in an operationally turning chuck body is a non-turning fluid coupling ring of which opposite side faces confront opposite side walls of the groove. Leading from annular ports in the groove walls are fluid passages which extend to chuck-closing and chuck-opening ends of a cylinder in the chuck body, and provided in the ring are fluid supply passages which lead to the opposite ring faces where they are in line with the ports in the confronting groove walls. The coupling ring has some lateral play in the body groove and acts as a shuttle valve in being operationally backed with either face into sealing engagement with the confronting groove wall by the pressure of operating fluid admitted to the port in the groove wall confronting the opposite ring face. Such operational back-up of the coupling ring with either side against the confronting groove wall will also open a gap between the opposite ring side and the confronting groove wall, and such gap at either ring side is open to the atmosphere and has associated therewith a sealing ring which is mounted on the chuck body and extends into the path of fluid escaping through the gap, with the sealing ring being flexed into closure of the gap to the atmosphere by fluid escaping into the gap.
REFERENCES:
patent: 2283022 (1942-05-01), Wallgren
patent: 3918352 (1975-11-01), Reich et al.
patent: 3926446 (1975-12-01), Rohm
patent: 3954275 (1976-05-01), Pickles
Cushman Industries, Incorporated
Jillions John M.
Spruegel Walter
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