US3872659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for production of tubular strand and rope
Assignee: Bridon Ropes Ltd
•
Filing: 1972-04-24
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Granted: 1975-03-25
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Expires: 1992-04-24
Abstract
Abstract Wires or strands are led through a die. The wires or strands are centrally supported against inward collapse, by a mandrel coaxial with the die, until the wires or strands are in mutual contact. The wires or strands can be compressed by the die, and the central support of the wires or strands may be maintained during at least the start of compression. Tubular strand can be produced which, in transverse section has a central circular void, and in which adjacent wires abut along interfaces which are straight lines in transverse section.
Inventors
- 👤 Robert Edward Campbell
- 👤 Cyril Duncan Ralph Sherwin
- 👤 Charles Leslie Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:07
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0693; D07B1/12; D07B3/00; D07B3/02; D07B3/04; D07B5/00; D07B5/007; D07B7/00; D07B7/02; D07B7/025; D07B7/027; D07B2201/00; D07B2201/20; D07B2201/2015; D07B2201/2019; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/53848; Y10T29/53857; Y10T29/53878; Y10T29/53883
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A method of forming a tubular wire-strand or tubular wirerope or tubular core for wire-rope by leading a plurality of round filaments, all of the same material, onto a rigid member having a circular transverse section with a portion thereof tapering in the direction of movement of the filaments passing through a circular annular die coaxial relative to the rigid member comprising the steps of: centrally supporting the filaments on the rigid member against inward collapse until the filaments are in mutual contact, compressing the filaments radially inwardly by means of the die to cause plastic flow at the points of mutual contact of the filaments; and centrally supporting the filaments, during at least the initial part of the compression, by supporting the filaments on the tapering portion of the rigid member.
Claim 2
Independent Claim
132 words
A method of forming a tubular wire-strand or tubular wirerope or tubular core for wire-rope by leading a plurality of round filaments, all of the same material, onto a rigid member having a circular transverse section with a portion thereof tapering in the direction of movement of the filaments passing through a circular annular die coaxial relative to the rigid member comprising the steps of: centrally supporting the filaments on the rigid member against inward collapse until the filaments are in mutual contact, compressing the filaments radially inwardly by means of the die to cause plastic flow at the points of mutual contact of the filaments; and centrally supporting the filaments, during at least the initial part of the compression, by supporting the filaments on the tapering portion of the rigid member.
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1, wherein, during compression, plastic flow of the filaments also occurs at the points of contact between the filaments and the rigid member.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 1, wherein the filaments are supported by the rigid member until the compression has ended.
Claim 5
Dependent Claim
29 words
A method as claimed in claim 1, wherein, during the compression, the filaments are centrally supported by a rigid cylinder which is a smooth continuation of the rigid member.
Claim 6
Dependent Claim
12 words
A method as claimed in claim 1, wherein the filaments are wires.
Claim 7
Dependent Claim
17 words
A method as claimed in claim 1, wherein the compressing of filaments radially inwardly is performed uniformly.
Claim 8
Dependent Claim
162 words
A tubular wire-strand or core for wire-rope having a plurality of filaments, all of the same material, which in transverse section has a central circular void, and in which adjacent filaments abut along interfaces which are straight lines in transverse section and in which plastic flow has occurred at the interfaces, by leading a plurality of round filaments, all of the same material, onto a rigid member having a circular transverse section with a portion thereof tapering in the direction of the motion of the filaments through a circular annular die comprising the steps of; centrally supporting the filaments on the rigid member against inward collapse until the filaments are in mutual contact, compressing the filaments radially inwardly by means of the die to cause plastic flow at the points of mutual contact of the filaments; and centrally supporting the filaments, during at least the initial part of the compression, by moving the filaments onto the tapering section of the rigid member.
Claim 9
Dependent Claim
162 words
A tubular wire-strand or core for wire-rope having a plurality of filaments, all of the same material, which in transverse section has a central circular void, and in which adjacent filaments abut along interfaces which are straight lines in transverse section and in which plastic flow has occurred at the interfaces, by leading a plurality of round filaments, all of the same material, onto a rigid member having a circular transverse section with a portion thereof tapering in the direction of the motion of the filaments through a circular annular die comprising the steps of; centrally supporting the filaments on the rigid member against inward collapse until the filaments are in mutual contact, compressing the filaments radially inwardly by means of the die to cause plastic flow at the points of mutual contact of the filaments; and centrally supporting the filaments, during at least the initial part of the compression, by moving the filaments onto the tapering section of the rigid member.
References Cited (Backward Citations)
US330047A
Cited
US475889A
Cited
US1261317A
Cited
US1245067A
Cited
US1712264A
Cited
US1537632A
Cited
US2222505A
Cited
US3083817A
Cited
US3128799A
Cited
US3130536A
Cited
US3667206A
Cited
US3707839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |