US4047692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for molding dynamically balanced fans
Assignee: TECAIR Inc A CORP OF ILLINOIS
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Filing: 1975-09-24
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Granted: 1977-09-13
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Expires: 1995-09-24
Abstract
Abstract A method of and apparatus for the manufacture of dynamically balanced molded plastic air movement devices wherein material may be readily added or deleted from inactive surface portions of the air movement devices during manufacture by adjustable pins accessable from the front or face of a mold half.
Inventors
- 👤 Richard E. Swin, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:18
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/325; B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/37; B29C45/376; B29L; B29L2031/00; B29L2031/08; B29L2031/087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
In a mold for molding dynamically balanced plastic air movement devices comprising mold halves having complementary surfaces forming a mold cavity in the configuration of an air movement device, the improvement comprising an insert supported in one of said mold halves for forming a portion of an air movement device, said insert having a plurality of adjustable plugs each movable into and out from the mold cavity for forming a balancing pad on said air movement device at a predetermined position to effect the dynamic balance of said air movement device.
Claim 2
Dependent Claim
91 words
In a mold for molding dynamically balanced plastic air movement devices comprising mold halves having complementary surfaces forming a mold cavity in the configuration of an air movement device, the improvement comprising an insert supported in one of said mold halves for forming a portion of an air movement device, said insert having a plurality of adjustable plugs each movable into and out from the mold cavity for forming a balancing pad on said air movement device at a predetermined position to effect the dynamic balance of said air movement device.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein said insert forms an aerodynamically inactive portion of the air movement device.
Claim 4
Dependent Claim
31 words
The apparatus of claim 1 wherein said insert forms a portion of the cavity defining the hub of the air movement device and the balancing pads are formed on the hub.
Claim 5
Dependent Claim
19 words
The apparatus of claim 3 wherein said adjustable plugs are spaced circumferentially about the center axis of said insert.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1 wherein said adjustable plugs are selectively retractable within said insert.
Claim 7
Dependent Claim
40 words
The apparatus of claim 5 wherein said adjustable plugs are retractable within said insert from that portion of a mold half having a complementary mold cavity forming surface thereon, and further include means for rotating said plugs to effect retraction.
Claim 8
Dependent Claim
96 words
In a mold for molding dynamically balanced plastic air movement devices comprising mold halves having complimentary surfaces forming a mold cavity in the configuration of an air movement device, the improvement comprising a plurality of adjustable plugs supported in one of the mold halves and defining a balancing pad forming portion of the mold cavity, each of said adjustable plugs having means for effecting movement of the plug relative to the remaining portion of the cavity forming surface actuable from said cavity forming surface to form dynamic balancing pads on an air movement device formed therein.
Claim 9
Dependent Claim
96 words
In a mold for molding dynamically balanced plastic air movement devices comprising mold halves having complimentary surfaces forming a mold cavity in the configuration of an air movement device, the improvement comprising a plurality of adjustable plugs supported in one of the mold halves and defining a balancing pad forming portion of the mold cavity, each of said adjustable plugs having means for effecting movement of the plug relative to the remaining portion of the cavity forming surface actuable from said cavity forming surface to form dynamic balancing pads on an air movement device formed therein.
Claim 10
Dependent Claim
33 words
The apparatus of claim 7, wherein said adjustable plugs are supported in said mold half at a position corresponding to an aerodynamically inactive portion of an air movement device formed within said cavity.
References Cited (Backward Citations)
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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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |