US3856450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold construction
Assignee: Honeywell International Inc
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Filing: 1972-11-06
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Granted: 1974-12-24
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Expires: 1992-11-06
Abstract
Abstract A mold including a pair of complementary hollow mold parts defining therebetween a mold cavity, and a plug carried by one of the mold parts for automatic shifting into and out of the cavity upon movement of the mold parts toward and away from each other.
Inventors
- 👤 G Britten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:56
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/54; B29C49/541; B29C2049/4856; B29C2049/4858; B29C2049/542; B29C2049/548; Y; Y10; Y10S; Y10S425/00; Y10S425/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A mold construction having a pair of separable complementary hollow mold parts combining to define a cavity for formation therein of a molded article, and wherein said mold parts having draft of unobstructed withdrawal away from each other and a molded article, comprising: a plug carried by one of said mold parts for movement into and out of said cavity for forming an external recess in a molded article when said plug is in its inwardly projecting position in said cavity, resilient means fixed to said one of said mold parts urging said plug toward its outwardly projecting position out of said cavity so as not to obstruct said mold part withdrawal, and cooperating means on said plug and the other of said mold parts to shift said plug to its inwardly projecting position in said cavity against said resilient means upon mold part movement toward each other for forming said recess in a molded article.
Claim 2
Dependent Claim
156 words
A mold construction having a pair of separable complementary hollow mold parts combining to define a cavity for formation therein of a molded article, and wherein said mold parts having draft of unobstructed withdrawal away from each other and a molded article, comprising: a plug carried by one of said mold parts for movement into and out of said cavity for forming an external recess in a molded article when said plug is in its inwardly projecting position in said cavity, resilient means fixed to said one of said mold parts urging said plug toward its outwardly projecting position out of said cavity so as not to obstruct said mold part withdrawal, and cooperating means on said plug and the other of said mold parts to shift said plug to its inwardly projecting position in said cavity against said resilient means upon mold part movement toward each other for forming said recess in a molded article.
Claim 3
Dependent Claim
36 words
A mold construction according to claim 1, the hollows of said molded parts being configured to define a generally cylindrical cavity, and said plug being longitudinally movable into and out of an end of said cavity.
Claim 4
Dependent Claim
25 words
A mold construction according to claim 2, said plug having a generally convex inner end surface for forming a concave recess in a molded article.
Claim 5
Dependent Claim
55 words
A mold construction according to claim 1, said cam means comprising a cam surface, on at least one of said other mold part and plug, diagonal to said withdrawal movement of said other mold part and the direction of movement, and engageable with the other of said mold parts and plug to shift the latter.
Claim 6
Dependent Claim
40 words
A mold construction according to claim 4, including an external extension on said plug exteriorly of said mold parts, said resilient means being exteriorly of said one mold part and operatively associated with said extension to effect said plug urgence.
Claim 7
Dependent Claim
31 words
A mold construction according to claim 5, in combination with fluid conduit means connected to said plug extension for communication with the interior of said plug to effect heat exchange therewith.
Claim 8
Dependent Claim
22 words
A mold construction according to claim 1, said cam means comprising slidably engageable conical surfaces on said plug and other mold part.
Claim 9
Dependent Claim
56 words
A mold construction according to claim 7, the hollows of said mold parts being configured to define a generally cylindrical cavity, and said plug having a generally convex inner end surface and being located for movement into and out of an end of said cavity generally concentric with said cavity and said slidably engageable conical surfaces.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |