Method for making a fluid filled ring

Details Method for making a fluid filled ring Method for making a fluid filled ring

1979-01-19

1981-05-19

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156146, 156147, 1563042, 277 26, 277 343, 277226, F16J 1546

Patent

active

042683319

ABSTRACT:
A fluid filled ring for a shaft sealing apparatus in a machine casing or container wall through which a rotatable shaft passes. The sealing apparatus comprises a housing fixed about its exterior surface to the machine casing. The housing defines an interior chamber in which one or more seals are positioned about the shaft. Each seal comprises a mechanical packing encircling and in contact with the shaft and an elastomeric compression ring positioned to encircle the mechanical packing.
The elastomeric ring is fluid filled and may be made by the steps of cooling a fluid; filling an elastomeric tube with the cooled fluid; clamping the ends of the tube to confine the fluid; increasing the temperature of the fluid filled clamped tube causing the tube to expand in response to expansion of the fluid; creating a weld between the ends of the clamped tube to form a hermetically sealed ring; removing the clamps for allowing the fluid to fill the resultant ring chamber so that the elastomeric material returns to its substantially unexpanded state.

REFERENCES:
patent: 1915660 (1933-06-01), Gammeter
patent: 1998915 (1935-04-01), Young
patent: 2688436 (1954-09-01), Melaven
patent: 3007600 (1961-11-01), Horner
patent: 3491825 (1970-01-01), Peterson et al.

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