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US3899206A Expired / Lapsed US ⏱️ 0.0 years remaining

Endless rope sling

Assignee: Individual
•
Filing: 1973-11-12
•
Granted: 1975-08-12
•
Expires: 1993-11-12
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Abstract

Abstract Herein disclosed is a multi-layered endless rope sling made of continuous nylon filament yarns. The endless rope sling comprises a core including a plurality of substantially concentric layers, which are consecutively braided from the nylon filament yarns in a manner to cover one with another, and a sheath including at least one substantially concentric layer which is consecutively braided from the filament yarns in a manner to cover the outermost layer of said core. A method of braiding the filament yarns into the endless rope sling is also disclosed, which comprises the steps of braiding the filament yarns into a rope of a predetermined length, bringing the leading end of said rope into contact with the trailing end, which is being braided, so as to form an endless rope, and continuing the braiding operation so as to consecutively cover one layer, which has been braided, with another which is being braided, thereby forming the multi-layered endless rope sling. In order to put the method into practice, the apparatus disclosed includes a plate structure, which is formed with an opening for continuously allowing a running endless rope under the braiding operation to pass therethrough, and to which a structural member is removably attached for allowing the manufactured endless rope sling to be taken out from the opening, and a plurality of guide rollers for guiding the running endless rope under a predetermined tension.

Inventors

  • 👤 Kitie Miura

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 19:13
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/06; D04C1/12; B; B66; B66C; B66C1/00; B66C1/10; B66C1/12; B66C1/18; D04C3/00; D04C3/02; D04C3/08; D04C3/36; D04C3/48; D07; D07B; D07B1/00; D07B1/14; D07B1/145; D07B1/18; D07B7/00; D07B7/16; D07B7/165; D07B2201/00; D07B2201/10; D07B2201/1096; D07B2201/20; D07B2201/2083; D07B2201/2087; D07B2201/2088; D07B2201/209

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 60 words
An endless rope sling comprising: a core including a plurality of substantially concentric layers which are consecutively braided from continuous filament yarns in a manner to cover one with another; and a sheath including at least one substantially concentric layer which is consecutively braided from said continuous filament yarns in a manner to cover the outermost layer of said core.
Claim 2
Dependent Claim 60 words
An endless rope sling comprising: a core including a plurality of substantially concentric layers which are consecutively braided from continuous filament yarns in a manner to cover one with another; and a sheath including at least one substantially concentric layer which is consecutively braided from said continuous filament yarns in a manner to cover the outermost layer of said core.
Claim 3
Dependent Claim 28 words
An endless rope sling according to claim 1, wherein said at least one layer has its trailing end fixed in position to the outermost layer of said core.
Claim 4
Dependent Claim 52 words
An endless rope sling according to claim 1, wherein the braiding angle of the layers of said core with respect to the axis of the endless rope sling is so determined at a small value as to prevent material reduction in the tensile strength of the endless rope sling as a whole.
Claim 5
Dependent Claim 46 words
An endless rope sling according to claim 1, wherein the braiding angle of said at least one layer of said sheath is so determined at a considerable value as to prevent sliding of said filament yarns and deformation of the endless rope sling as a whole.
Claim 6
Dependent Claim 20 words
An endless rope sling according to claim 1, wherein said continuous filament yarns are made of a thermoplastic synthetic resin.
Claim 7
Dependent Claim 28 words
An endless rope sling according to claim 5, wherein said thermoplastic synthetic resin is selected from the group consisting of nylon, polyester synthetic resin and polyvinyl alcohol resin.
Claim 8
Dependent Claim 108 words
A composite endless rope sling comprising: a plurality of tightly bundled endless ropes each comprising a core including a plurality of substantially concentric layers, which are consecutively braied from continuous filament yarns in a manner to cover one with another, and a sheath including at least one substantially concentric layer which is consecutively braided from said continuous filament yarns in a manner to cover the outermost layer of said core; and a sheath including at least one layer which is braided from continuous filament yarns in a manner to cover said tightly bundled endless ropes and which has its trailing end fixed in position to its outer surface.
Claim 9
Dependent Claim 108 words
A composite endless rope sling comprising: a plurality of tightly bundled endless ropes each comprising a core including a plurality of substantially concentric layers, which are consecutively braied from continuous filament yarns in a manner to cover one with another, and a sheath including at least one substantially concentric layer which is consecutively braided from said continuous filament yarns in a manner to cover the outermost layer of said core; and a sheath including at least one layer which is braided from continuous filament yarns in a manner to cover said tightly bundled endless ropes and which has its trailing end fixed in position to its outer surface.

References Cited (Backward Citations)

US2082828A Cited
US3008287A Cited
US3276810A Cited
US3537742A Cited
US3718949A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-08-11 1979-02-10 1979-08-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-08-11 1983-02-10 1983-08-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-08-11 1987-02-10 1987-08-12 $7700.00 Window Closed / Lapsed

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