Pipe joints or couplings – Swivel – Pipe in socket type
Patent
1996-07-30
1998-02-10
Ricci, John A.
Pipe joints or couplings
Swivel
Pipe in socket type
285352, F16L 2700
Patent
active
057160805
ABSTRACT:
A bearingless, mechanical, rotary, fluid-tight coupling apparatus for effecting a fluid-tight seal between a non-rotating member such as a fluid supply line and a rotating member, such as a spindle, of a flexible machine tool. The apparatus includes a guide member having an axially extendable and retractable plunger. The plunger has a polygonal-shaped shoulder portion protruding therefrom which is moveable slidably, axially within a polygonal-shaped recess formed in the guide member of the apparatus. The polygonal-shaped recess and polygonal-shaped shoulder portion operate cooperatively to allow the plunger to be retracted as needed when the spindle of the machine tool retracts to permit changing of a tool secured to the spindle, while permitting a slight degree of misalignment of the spindle relative to the apparatus without affecting the fluid-tight seal therebetween. The apparatus is particularly well adapted to be used with flexible machine tools which require the spindle thereof to move axially a limited distance when a tool secured to the spindle is to be changed.
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