Rotary fluid supply joints for expansible mandrels

Details Rotary fluid supply joints for expansible mandrels Rotary fluid supply joints for expansible mandrels

1976-10-20

1977-11-15

Shapiro, Jacob

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 72B, E02D 730

Patent

active

040579700

ABSTRACT:
An expansible mandrel operated by fluid pressure has its head end encircled by a fluid supply joint having inner and outer rings, the outer ring supported by the hoist ring of a pile driver and held against turning by the guide rails thereof. The inner ring is supported by the outer ring for rotation independently thereof and is connected to the mandrel to turn therewith. Each ring has a pair of conduits with the corresponding conduits of the two rings in communication. Each of the conduits of the outer ring is connected to a hose extending to the ground and each of the two conduits of the inner ring is connected by a hose to the appropriate one of the conduits that are in communication with the fluid pressure operated means.

REFERENCES:
patent: 3005315 (1961-10-01), Cobi
patent: 3418817 (1968-12-01), Rusche
patent: 3802207 (1974-04-01), Guild et al.

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