US3828406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a cast hinge
Assignee: Coats and Clark Inc
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Filing: 1973-05-30
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Granted: 1974-08-13
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Expires: 1993-05-30
Abstract
Abstract A cast hinged article and the method and apparatus for simultaneously casting both parts of the article. A first part of the article is formed with inner projections, and a second part of the article is formed thereover to enclose the projections to provide a hinged pivot. A staking unit which includes a punch then distorts the material in the first part adjacent to the projections so that the pivot will be freely movable.
Inventors
- 👤 K Hannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:25
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/12; E; E05; E05Y; E05Y2900/00; E05Y2900/20; Y; Y10; Y10T; Y10T29/00; Y10T29/24; Y10T29/49; Y10T29/4998; Y10T29/49988
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
150 words
A method of casting an article between relatively movable dies comprising passing material in heated fluid condition through passages around a transfer core pin to be solidified in separate molds to simultaneously form an upper first element and a longitudinally aligned lower second element; said second element being formed in an articulated manner around part of said first element that has been moved downwardly by said transfer core pin from its prior upper position where it was formed, said first and second elements being pivoted together in the articulated condition; moving said articulated first and second elements downwardly to a staking position to position said articulated elements between opposed moving means; moving said opposed means together to contact said articulated elements on either side thereof; and forcing punch means into one side of said first element to form depression means therein to distort the material thereabout to loosen the pivot.
Claim 2
Independent Claim
150 words
A method of casting an article between relatively movable dies comprising passing material in heated fluid condition through passages around a transfer core pin to be solidified in separate molds to simultaneously form an upper first element and a longitudinally aligned lower second element; said second element being formed in an articulated manner around part of said first element that has been moved downwardly by said transfer core pin from its prior upper position where it was formed, said first and second elements being pivoted together in the articulated condition; moving said articulated first and second elements downwardly to a staking position to position said articulated elements between opposed moving means; moving said opposed means together to contact said articulated elements on either side thereof; and forcing punch means into one side of said first element to form depression means therein to distort the material thereabout to loosen the pivot.
Claim 3
Dependent Claim
47 words
A method of casting according to claim 1 including forming inner tapered projections on said first element, forming enclosure areas on said second element that correspond to and enclose said prjections, and effecting the distortion by spreading the material to free said projections from said enclosure areas.
Claim 4
Dependent Claim
44 words
A method of casting according to claim 1 wherein said first and second articulated elements form a hinge with substantially flat front and back surfaces, and said opposed means are moved toward each other to make individual contact throughout said front and back surfaces.
Claim 5
Dependent Claim
29 words
A method of casting according to claim 3 including sliding said punch means through one of said opposed means to contact said back surface to form the depression means.
Claim 6
Dependent Claim
26 words
A method of casting According to claim 4 including forming the depression means by spreading the material in two parallel-spaced areas aligned respectively with said projections.
Claim 7
Dependent Claim
40 words
A method of casting according to claim 3 wherein said front and back surfaces are contacted by elements located within said opposed means, said elements each being movable during the staking step within respective opposed means against a biasing force.
Claim 8
Independent Claim
123 words
A method for forming an article having a first element with first and second aligned pivot means facing each other and joined by a bridge area, and a second element with third and fourth pivot means cooperatively engaging said first and second pivot means respectively whereby the first and second elements are pivoted together in an articulated condition; said method comprising casting one of said elements, then casting the other of said elements with the pivot means of the one element forming a casting surface for the pivot means of the other element, and then deforming said bridge area to effect the opposite relative displacement of the first and second pivot means to loosen the pivotal connection between said first and second elements.
Claim 9
Independent Claim
123 words
A method for forming an article having a first element with first and second aligned pivot means facing each other and joined by a bridge area, and a second element with third and fourth pivot means cooperatively engaging said first and second pivot means respectively whereby the first and second elements are pivoted together in an articulated condition; said method comprising casting one of said elements, then casting the other of said elements with the pivot means of the one element forming a casting surface for the pivot means of the other element, and then deforming said bridge area to effect the opposite relative displacement of the first and second pivot means to loosen the pivotal connection between said first and second elements.
Claim 10
Dependent Claim
18 words
The method of claim 7 wherein said step of deforming comprises compressing a portion of said bridge area.
Claim 11
Dependent Claim
21 words
The method of claim 7 wherein said step of deforming comprises forcing punch means into one side of said bridge area.
Claim 12
Dependent Claim
31 words
The method of claim 7 wherein said step of deforming comprises forcing a die into said bridge area to effect the relative opposite displacement of said first and second pivot means.
Claim 13
Dependent Claim
44 words
The method of claim 7 wherein said step of deforming comprises forcing a pair of parallel linear die projections into said bridge area, said die projections being oriented normal to the pivotal axis of said article, to form parallel depressions in said bridge area.
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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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |