US4781555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming molded patterns
Assignee: EFP LLC
•
Filing: 1987-01-07
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Granted: 1988-11-01
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Expires: 2007-01-07
Abstract
Abstract A mold has mold walls defining a cavity and a plurality of heated fluid inlets communicating with the cavity. An enclosed frame for storing a heated fluid is positioned about the mold. Valves are positioned completely within the enclosed frame and each of the valves is coupled to one of the heated fluid mold inlets.
Inventors
- 👤 Charles A. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:40
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/048; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C44/58; B29C44/3415; B29C44/3426
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
Apparatus for forming a molded pattern from expandable materials, said apparatus comprising: a mold which has mold walls defining a cavity accurately defining the shape of said pattern and a plurality of heated fluid mold inlets therein communicating with said cavity; an enclosed frame means positioned about said mold for storing a quantity of a heated fluid; means for introducing said fluid into said enclosed frame means and thereby heat said mold walls; valve means positioned completely within said enclosed frame means, said valve means having a valve means inlet within said enclosed frame means, and said valve means coupled with said heated fluid mold inlet for regulating the amount of said heated fluid delivered to said mold cavity from said enclosed frame means, and a single means extending through said enclosed frame means for selectively opening said valve means to deliver said heated fluid to said mold cavity.
Claim 2
Dependent Claim
149 words
Apparatus for forming a molded pattern from expandable materials, said apparatus comprising: a mold which has mold walls defining a cavity accurately defining the shape of said pattern and a plurality of heated fluid mold inlets therein communicating with said cavity; an enclosed frame means positioned about said mold for storing a quantity of a heated fluid; means for introducing said fluid into said enclosed frame means and thereby heat said mold walls; valve means positioned completely within said enclosed frame means, said valve means having a valve means inlet within said enclosed frame means, and said valve means coupled with said heated fluid mold inlet for regulating the amount of said heated fluid delivered to said mold cavity from said enclosed frame means, and a single means extending through said enclosed frame means for selectively opening said valve means to deliver said heated fluid to said mold cavity.
Claim 3
Dependent Claim
55 words
An apparatus of claim 1 wherein said valve means is a normally closed valve means and said valve selectively opening means is an air pump in communication with said valve means wherein activation of said air pump opens said valve means to introduce said heated fluid into said mold cavity from said enclosed frame means.
Claim 4
Dependent Claim
40 words
An apparatus of claim 1, wherein said valve means is a normally open valve means and said valve selectively opening means selectively closes said valve means wherein fluid flow to said mold cavity from said enclosed frame means is ceased.
Claim 5
Dependent Claim
42 words
An apparatus of claim 1, further comprising: a manifold disposed in said enclosed frame means and coupled to said heated fluid mold inlets, said manifold generally spaced from said mold walls and said valve means inlet providing an inlet for said manifold.
Claim 6
Dependent Claim
38 words
An apparatus of claim 1, further comprising: common control means for selectively controlling the flow of heated fluid from said enclosed frame means to said mold inlets, said common control means disposed generally away from said mold walls.
Claim 7
Dependent Claim
46 words
An apparatus of claim 5, wherein said common control means includes separate valve means for each said mold inlet and for selectively opening and closing said mold inlets, and common actuation means for selectively simultaneously actuating said valve means to shift between open and closed conditions.
Claim 8
Dependent Claim
39 words
An apparatus of claim 6, wherein said valve means are pressure actuated valves, and said common actuation means includes a pressurized fluid supply conduit coupled to said valves and a pressure control valve on said pressurized fluid supply conduit.
Claim 9
Dependent Claim
43 words
An apparatus of claim 5, wherein said common control means includes a manifold coupled to said mold inlets and having a manifold inlet disposed in said enclosed frame means, and valve means on said manifold for selectively opening and closing said manifold inlet.
References Cited (Backward Citations)
CA597175A
Cited
CA630441A
Cited
US3225126A
Cited
US3156015A
Cited
US3141192A
Cited
US3214794A
Cited
US3257103A
Cited
US3193876A
Cited
US3264381A
Cited
US3424827A
Cited
US3291875A
Cited
US3235908A
Cited
US3374500A
Cited
US3537131A
Cited
US3556460A
Cited
US3809735A
Cited
US3801244A
Cited
US3874830A
Cited
US3912430A
Cited
US4081225A
Cited
US4192638A
Cited
CA1102067A
Cited
FR2379367A1
Cited
US4276008A
Cited
US4298324A
Cited
US4333897A
Cited
US4233006A
Cited
US4190093A
Cited
US4327045A
Cited
SU908475A1
Cited
US4439122A
Cited
US4456443A
Cited
US4627946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |