Corregated refrigeration hose system

Details Corregated refrigeration hose system Corregated refrigeration hose system

1991-06-17

1994-09-27

Simone, Timothy F.

Pipes and tubular conduits

Combined

With external support structure

138121, 138125, 138137, F16L 1104

Patent

active

053499883

ABSTRACT:
A multiple layer hose and fitting assembly for refrigeration circuits particularly suitable for larger sizes of refrigeration conduit wherein refrigerant loss to the atmosphere through the hose material is minimized and flexibility is maintained. An inner tube of thermoplastic material is employed to minimize refrigerant loss due to permeation, and the inner tube is corrugated to provide lateral flexibility. The hose includes pressure reinforcing layers or covers, and a moisture ingression resistant sheath or layer circumscribes the inner tube to protect the inner tube from contamination by moisture. In the preferred embodiment the sheath is located between a braided reinforcing layer engaging the inner tube and a braided cover. The moisture ingression resistant layer is preferably formed of a thermoplastic rubber, and the adjacent hose layers are capable of limited axial displacement relative to each other to assure lateral flexibility. The hose utilizes fittings which include a serrated socket to aid in fitting retention, and sealing rings or a tubular insert cooperating with the hose corrugations may be employed to augment fitting sealing.

REFERENCES:
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patent: 4905736 (1990-03-01), Kitami et al.
patent: 5037143 (1991-08-01), Sanders et al.
patent: 5129428 (1992-07-01), Winter et al.
patent: 5129429 (1992-07-01), Winter et al.
patent: 5129686 (1992-07-01), Sanders et al.
patent: 5148836 (1992-09-01), Lawrence

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