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US 4,304,266 AGranted
Smooth bore flexible hose
AssigneeAutomation Industries, Inc.
InventorsThomas A. Kutnyak, Marvin A. Koerber
Life of this patent
Estimating the term…
Abstract
A helically fabricated flexible hose having a self-supporting helical reinforcing element of non-circular cross-section with a flat side facing inwardly, thereby imparting a substantially smooth surface to the hose interior.
Claims7
A helically fabricated flexible hose with a substantially smooth interior surface comprising
- (a) at least one plastic strip wrapped helically with successive convolutions overlapping and forming a flexible hose wall of at least one ply, and
- (b) at least one self-supporting helical reinforcing element concentric with and engaging the inside of said wall, and
- (c) said reinforcing element being of composite construction comprising
- i. an inner metal wire of circular cross-section, and
- ii. an outer plastic sheath of non-circular cross-section totally enclosing said wire and having a substantially flat side facing inwardly toward the hose interior and an opposite substantially rounded side engaging the wall strip, said flat side being substantially spaced from said wire and
- iii. the plastic sheath being bonded to the plastic wall strip.
3 more elements
A helically fabricated flexible hose with a substantially smooth interior surface comprising:
- (a) at least one strip wrapped helically with successive convolutions overlapping and forming a flexible hose wall of at least one ply, and
- (b) at least one self-supporting helical reinforcing element concentric with and engaging said wall,
- (c) said reinforcing element being of composite construction comprising
- (i) an inner wire, and
- (ii) an outer plastic sheath of non-circular construction totally enclosing said wire and having a substantially flat side facing inwardly toward the hose interior and an opposite substantially rounded side engaging the wall strip said flat side being substantially spaced from said wire.
2 more elements
Dependencies are inferred from the claim text.