Method for forming a spiral-wound flexible piping
AssigneeTru-Flex Metal Hose Corporation
InventorRoy W. Thomas
Life of this patent
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Abstract
Flexible piping includes a first, spiral-wound band forming an inner winding and a second, spiral-wound band forming an outer winding in covering relationship over the inner winding. Inner and outer spiral-wound bands of insulating material are wound between the inner and outer windings and over the outer winding respectively. An insulating sleeve receives the spiral-wound inner and outer windings and the inner and outer insulating material bands. A method and a machine for forming the flexible piping are also disclosed.
Claims17
A method of forming flexible piping, which includes the steps of:
- (a) spiral-winding an inner winding comprising a metallic band;
- (b) interlocking leading and trailing edges of said inner winding;
- (c) spiral-winding an outer winding comprising a metallic band in overlying relation over said inner winding;
- (d) interlocking leading and trailing edges of said outer winding;
- and
- (e) spiral-winding a sealing material band in overlying relation with respect to at least one of said inner and outer windings.
A method of forming flexible piping, which includes the steps of:
- (a) spiral-winding an inner winding comprising a metallic band;
- (b) interlocking leading and trailing edges of said inner winding;
- (c) spiral-winding an outer winding comprising a metallic band in overlying relation over said inner winding;
- (d) interlocking leading and trailing edges of said outer winding;
- (e) spiral-winding a sealing material band in overlying relation with respect to at least one of said inner and outer windings, the leading edge of said sealing material band being folded together with the leading edge of said at least one winding, the trailing edge of said sealing material band being folded together with the trailing edge of said at least one winding, and said folded leading edges of said sealing material band and said at least one winding being interlocked with said folded trailing edges of said sealing material band and said at least one winding.
Dependencies are inferred from the claim text.