Patent US3918749A successfully refreshed from Google Patents.
US3918749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete hose and coupling
Assignee: Construction Forms Inc
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Filing: 1974-08-07
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Granted: 1975-11-11
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Expires: 1994-08-07
Abstract
Abstract A flexible hose for transport of concrete and the like includes a hardened helical wire to prevent collapse under negative pressure and bending of the hose. The hose is provided with an end coupling having a hardened inner shank with the outer surface serrated or the like to provide firm interengagement with the inner hose surface grooved for interconnection by the conventional releasable coupler. The hose end is specially processed to remove the hardness from the helical wire. The hose may be abraded adjacent the location of the inner end of the shank and a current passed through the end portion of the wire. The hose is forced over the shank and an outer clamp device forces the hose with the soft helical wire onto the shank and firmly affixes the hardened shank to the hose.
Inventors
- 👤 Edward A Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:49
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/20; F16L33/207; F16L33/2071; F16L33/2073; F16L33/2076; B; B65; B65G; B65G53/00; B65G53/32; E; E04; E04G; E04G21/00; E04G21/02; E04G21/04; E04G21/0418; E04G21/0436; F16L11/00; F16L11/04; F16L11/08; F16L11/088; F16L33/02; F16L33/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A concrete placement hose unit comprising a flexible rubberlike hose having a wire support embedded within a rubber-like body, said hose having a coupling end including said wire support and receiving an end coupling shank of a hardened material projecting into the coupling end of said hose and having an inner diameter corresponding to the unstressed inner diameter of said hose, comprising the improvement wherein said wire support includes at least one wire-like element extending continuously through the coupling end and into the adjacent body, said continuous wire-like element being a hardened element within the adjacent body and a relatively soft, ductile element within the coupling end, said shank projecting outwardly of said hose, and a clamp means encircling the end of the hose in alignment with said hardened shank.
Claim 2
Dependent Claim
130 words
A concrete placement hose unit comprising a flexible rubberlike hose having a wire support embedded within a rubber-like body, said hose having a coupling end including said wire support and receiving an end coupling shank of a hardened material projecting into the coupling end of said hose and having an inner diameter corresponding to the unstressed inner diameter of said hose, comprising the improvement wherein said wire support includes at least one wire-like element extending continuously through the coupling end and into the adjacent body, said continuous wire-like element being a hardened element within the adjacent body and a relatively soft, ductile element within the coupling end, said shank projecting outwardly of said hose, and a clamp means encircling the end of the hose in alignment with said hardened shank.
Claim 3
Dependent Claim
35 words
The concrete placement hose unit of claim 1 wherein said hose unit has the outer surface of the hose body adjacent the inner edge of the coupling end removed to expose at least one wire.
Claim 4
Dependent Claim
31 words
The concrete placement hose unit of claim 1 wherein said wire support includes a continuous pair of coils wound as a single layer with adjacent coil turns formed of hardened wire.
Claim 5
Dependent Claim
41 words
The concrete placement hose unit of claim 1 wherein said clamp means includes an outer ferrule of ductile metal, and a plurality of indentations being spaced longitudinally of each other and defining the means of interlocking the shank to the hose.
Claim 6
Dependent Claim
47 words
The concrete placement hose unit of claim 4 wherein said shank has an outer serrated surface and said ferrule has a smooth inner surface, and said indentations include a single pair of annular indentations longitudinally spaced from each other and from the opposite ends of the ferrule.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |