US3662539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection moulded chain, especially plastic chain
Assignee: Individual
•
Filing: 1969-10-14
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Granted: 1972-05-16
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Expires: 1989-10-14
Abstract
Abstract A chain or the like is formed by injection moulding of a first link into a second link, one of the links having a non-circular cross-section, which cross-section is preferably substantially defined by a semi-circle and a straight line or a polygon, and has an extent perpendicular to the plane of the link which is at least approximately equal to the spacing between the side portions of the other link and a smaller extent in the plane of the link.
Inventors
- 👤 Peter Florjancic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
F; F16; F16G; F16G13/00; F16G13/12; F16G13/14; B; B29; B29C; B29C45/00; B29C45/0017
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A link chain or like article from moldable material comprising at least two separate links that are elongate-ringshaped consisting of two opposed side portions and two opposed curved end portions, said links in their position of use of the chain engaging one another along lines in at least two planes that are perpendicular to each other for transmitting a force from one link to the other, the length of the cross-section in a plane transverse to the plane of a link being approximately equal to the spacing between the side portions of the other link, the cross-section of each link being substantially defined by a circular arc and a straight line and shorter in length in the plane of the link than transverse to the plane of the link.
Claim 2
Dependent Claim
129 words
A link chain or like article from moldable material comprising at least two separate links that are elongate-ringshaped consisting of two opposed side portions and two opposed curved end portions, said links in their position of use of the chain engaging one another along lines in at least two planes that are perpendicular to each other for transmitting a force from one link to the other, the length of the cross-section in a plane transverse to the plane of a link being approximately equal to the spacing between the side portions of the other link, the cross-section of each link being substantially defined by a circular arc and a straight line and shorter in length in the plane of the link than transverse to the plane of the link.
Claim 3
Dependent Claim
46 words
A link chain as claimed in claim 1 wherein at least one of said links has projections extending inwardly from the side portions thereof which allow displacement of the links from said position of use only by resilient deformation of at least one of said links.
Claim 4
Dependent Claim
44 words
A link chain as claimed in claim 1 wherein the curvature of said circular arc is at least approximately equal to the inner curvature of the curved end portion of the other link against which the first link abuts in its position of use.
Claim 5
Independent Claim
202 words
A method for manufacture of a link chain of a form that has at east two separate links that are elongate-ring-shaped consisting of two opposed side portions, said links in their position of use of the chain engaging one another along lines in at least two planes that are perpendicular to each other for transmitting a force from one link to the other, the length of the cross-section in a plane transverse to the plane of a link being approximately equal to the spacing between the side portions of the other link, the cross-section of each link being shorter in length in the plane of the link than transverse to the plane of the link which comprises injection molding a first link, closing the parts of a multisectional injection mold about said first link, injection molding a second link in the closed mold at an angular position twisted 90* from the position of said second link to said first link in the position of use of the chain, opening the parts of said mold to release said second link and repeating said mold closing, injection molding and mold opening steps forming successive new links until a chain of desired length is produced.
Claim 6
Independent Claim
202 words
A method for manufacture of a link chain of a form that has at east two separate links that are elongate-ring-shaped consisting of two opposed side portions, said links in their position of use of the chain engaging one another along lines in at least two planes that are perpendicular to each other for transmitting a force from one link to the other, the length of the cross-section in a plane transverse to the plane of a link being approximately equal to the spacing between the side portions of the other link, the cross-section of each link being shorter in length in the plane of the link than transverse to the plane of the link which comprises injection molding a first link, closing the parts of a multisectional injection mold about said first link, injection molding a second link in the closed mold at an angular position twisted 90* from the position of said second link to said first link in the position of use of the chain, opening the parts of said mold to release said second link and repeating said mold closing, injection molding and mold opening steps forming successive new links until a chain of desired length is produced.
Claim 7
Dependent Claim
23 words
The method of claim 4 wherein an ornament or like member is molded on an outer surface of a link of the chain.
Claim 8
Dependent Claim
45 words
The method of claim 5 wherein ornamentation is applied upon an outer surface of said first link prior to said step of closing the injection mold about the link and said second link is molded without any ornament or like member upon an outer surface.
References Cited (Backward Citations)
GB191315848A
Cited
US2051653A
Cited
DE688540C
Cited
US2311317A
Cited
GB554057A
Cited
FR1041883A
Cited
US3453823A
Cited
US3410085A
Cited
US3380571A
Cited
US3507112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |