US4059302A
Expired / Lapsed
US
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Metal chain sling
Assignee: LIFTEX Inc
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Filing: 1976-04-19
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Granted: 1977-11-22
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Expires: 1996-04-19
Abstract
Abstract A sling comprising a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both the ends of at least some of the chain lengths being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Inventors
- 👤 George Barthule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:31
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/12; B66C1/18
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
214 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both ends of at least some of the chains being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, the links in even-numbered rows being at an angle of approximately 45°, and the links in the odd-numbered rows being at an angle of approximately 135°, from the top bearing surface of the sling, and with the links in each row being at an angle of approximately 90° with respect to the links in each adjoining row, and a flexible metal cable threaded in a serpentine manner through the center of all the links in an odd-numbered row, looped back and threaded through the center of all the links in the adjoining even-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest odd-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest even-numbered row, and then looped and threaded back and forth through the adjoining rows of links in the described serpentine manner for most of the length of the sling.
Claim 2
Dependent Claim
214 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both ends of at least some of the chains being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, the links in even-numbered rows being at an angle of approximately 45°, and the links in the odd-numbered rows being at an angle of approximately 135°, from the top bearing surface of the sling, and with the links in each row being at an angle of approximately 90° with respect to the links in each adjoining row, and a flexible metal cable threaded in a serpentine manner through the center of all the links in an odd-numbered row, looped back and threaded through the center of all the links in the adjoining even-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest odd-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest even-numbered row, and then looped and threaded back and forth through the adjoining rows of links in the described serpentine manner for most of the length of the sling.
Claim 3
Dependent Claim
22 words
A sling according to claim 1 in which the cable is double ended and each end is fixedly positioned near each terminal.
Claim 4
Dependent Claim
44 words
A sling according to claim 2 in which each end of the cable is looped to the rear and threaded into the next prior row of links to put two cable sections in side-by-side position, and friction connection means joining the cable sections together.
Claim 5
Dependent Claim
137 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both ends of at least some of the chains being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, each two adjacent links in each row being either parallel to one another or at an angle of approximately 90° with respect to one another, the links in the rows being at an angle of approximately 45°, or at an angle of 135°, from the top bearing surface of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 6
Dependent Claim
137 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both ends of at least some of the chains being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, each two adjacent links in each row being either parallel to one another or at an angle of approximately 90° with respect to one another, the links in the rows being at an angle of approximately 45°, or at an angle of 135°, from the top bearing surface of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 7
Dependent Claim
25 words
A sling according to claim 4 in which the links in each chain are at approximately 90° with respect to adjoining links in the chain.
Claim 8
Dependent Claim
110 words
A sling according to claim 4 in which the flexible metal cable is threaded in a serpentine manner through the center of all the links in an odd-numbered row, looped back and threaded through the center of all the links in the adjoining even-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest odd-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest even-numbered row, and then looped and threaded back and forth through the adjoining rows of links in the described serpentine manner for most of the length of the sling.
Claim 9
Dependent Claim
147 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both ends of at least some of the chains being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, all the links in nearly all of the rows being positioned so that each two links adjacent to one another in each row are at an angle of approximately 90° with respect to one another, the links in the rows being at an angle of approximately 45°, or at an angle of 135°, from the top bearing surface of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 10
Dependent Claim
147 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both ends of at least some of the chains being connected thereto, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, all the links in nearly all of the rows being positioned so that each two links adjacent to one another in each row are at an angle of approximately 90° with respect to one another, the links in the rows being at an angle of approximately 45°, or at an angle of 135°, from the top bearing surface of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 11
Dependent Claim
25 words
A sling according to claim 7 in which the links in each chain are at approximately 90° with respect to adjoining links in the chain.
Claim 12
Dependent Claim
109 words
A sling according to claim 7 in which the flexible metal cable is threaded in a serpentine manner through the center of all the links in an odd-numbered row, looped back and threaded through the center of all the links in the adjoining even-numbered row, then looped back and threaded through the center of the links in the adjoining next highest odd-numbered row, then looped back and threaded through the center of all the links in the adjoining next highest even-numbered row, and then looped and threaded back and forth through the adjoining rows of links in the described serpentine manner for most of the length of the sling.
Claim 13
Dependent Claim
100 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both of the ends of the chain lengths being connected thereto, except for at least one of the chains which is not connected to the terminals, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 14
Dependent Claim
100 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both of the ends of the chain lengths being connected thereto, except for at least one of the chains which is not connected to the terminals, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 15
Dependent Claim
123 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a flat metal terminal at each end of the sling, a groove which extends nearly the width of the terminal in the end of each terminal, the end link at each end of at least some of the chain lengths being positioned in the terminal groove and connected thereto by pins passed through the terminals and the end links, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 16
Dependent Claim
123 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a flat metal terminal at each end of the sling, a groove which extends nearly the width of the terminal in the end of each terminal, the end link at each end of at least some of the chain lengths being positioned in the terminal groove and connected thereto by pins passed through the terminals and the end links, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 17
Dependent Claim
130 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both of the ends of at least some of the chain lengths being connected thereto, each metal terminal having substantially flat opposing faces, a plurality of spaced-apart grooves in each terminal, a chain end link in each groove and a pin passing through the terminal, grooves and end links to join the chains to the terminal, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
Claim 18
Dependent Claim
130 words
A sling comprising: a plurality of metal chains placed in side-by-side parallel arrangement, a metal terminal at each end of the sling, with both of the ends of at least some of the chain lengths being connected thereto, each metal terminal having substantially flat opposing faces, a plurality of spaced-apart grooves in each terminal, a chain end link in each groove and a pin passing through the terminal, grooves and end links to join the chains to the terminal, the metal chains being positioned with the links in a plurality of rows lateral to the length of the sling, and a flexible metal cable threaded in a serpentine manner through the center of all the links in a plurality of adjoining rows for most of the length of the sling.
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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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |