US4744106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engineering cap with structure of fan device
Assignee: Individual
•
Filing: 1987-02-19
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Granted: 1988-05-17
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Expires: 2007-02-19
Abstract
Abstract An engineering safety cap for providing both security and ventilation. The cap according to a specific embodiment comprises a top portion, sides and an open bottom which together define an inner compartment. The top portion has a circular opening defined by axially extending walls and the opening is in communication with the inner compartment. The safety cap further includes a cylindrical cover having a motor driven fan mounted therein and which, in turn, is pivotably mounted at one edge thereof to the cap such that the cover can be positioned inside the cap opening. Magnets mounted on both the cover and the opening walls removably retain the cover in the closed position. Axially extending grooves are provided along the circumference of both the cover and the cap opening walls.
Inventors
- 👤 Gong S. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:18
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/28; A42B3/286; Y; Y10; Y10S; Y10S2/00; Y10S2/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
133 words
A protective engineering safety cap device including means for removing heat comprising in combination a cap having a top portion, sides and an open bottom, which together define an inner compartment, said top portion having an opening defined by walls in said cap, said opening being in communication with said inner compartment; a cover having at least a portion with a circumference sized and shaped so as to fit in said top portion opening in close proximity to said opening walls; a motor driven fan mounted in said cover; means for pivotably attaching said cover to said cap such that said cover can be positioned between a first closed position in which said cover closes said opening, and a second, opening position; and means for removably retaining said cover in said closed position.
Claim 2
Dependent Claim
133 words
A protective engineering safety cap device including means for removing heat comprising in combination a cap having a top portion, sides and an open bottom, which together define an inner compartment, said top portion having an opening defined by walls in said cap, said opening being in communication with said inner compartment; a cover having at least a portion with a circumference sized and shaped so as to fit in said top portion opening in close proximity to said opening walls; a motor driven fan mounted in said cover; means for pivotably attaching said cover to said cap such that said cover can be positioned between a first closed position in which said cover closes said opening, and a second, opening position; and means for removably retaining said cover in said closed position.
Claim 3
Dependent Claim
44 words
The engineering safety cap device as claimed in claim 1 wherein said cap cover has elongate vent grooves around the circumference of said cover portion that fits in said cap opening; and wherein said opening walls have elongate vent grooves around the circumference thereof.
Claim 4
Dependent Claim
62 words
The engineering safety cap device as claimed in claim 2 wherein said cap further includes a waterproof shield means for providing a waterproof shield over said cover, said means including a housing mounted to said cap adjacent said cover attaching means, a soft shaft rotatably mounted in said housing, and a waterproof cloth rolled around said shaft and having a free end.
Claim 5
Dependent Claim
28 words
The engineering safety cap device as claimed in claim 3 wherein said waterproof shield means further includes means for removably attaching said cloth free end to said cap.
Claim 6
Dependent Claim
22 words
The engineering safety cap device as claimed in claim 3 wherein said waterproof shield means further includes means for rewinding said cloth.
Claim 7
Dependent Claim
62 words
The engineering safety cap device as claimed in claim 1 wherein said cap further includes a waterproof shield means for providing a waterproof shield over said cover, said means including a housing mounted to said cap adjacent said cover attaching means, a soft shaft rotatably mounted in said housing, and a waterproof cloth rolled around said shaft and having a free end.
Claim 8
Dependent Claim
28 words
The engineering safety cap device as claimed in claim 6 wherein said waterproof shield means further includes means for removably attaching said cloth free end to said cap.
Claim 9
Dependent Claim
22 words
The engineering safety cap device as claimed in claim 6 wherein said waterproof shield means further includes means for rewinding said cloth.
Claim 10
Dependent Claim
32 words
The engineering safety cap device as claimed in claim 1 wherein said cover is substantially cylindrical and has an upper axial face and a lower axial face that opposes said inner compartment.
Claim 11
Dependent Claim
83 words
The engineering safety cap device as claimed in claim 9 wherein said cap top portion further includes a housing member having a bottom and walls and extending axially below said opening into said inner compartment, said housing member receiving said fan when said fan is positioned in said first closed position, said housing member walls having axially extending, elongate vent grooves around the circumference thereof and further having vent openings in the bottom thereof such that said housing member bottom is a screen.
Claim 12
Dependent Claim
58 words
The engineering safety cap device as claimed in claim 9 wherein said retaining means comprises a first magnet mounted on said cap opening walls and a second magnet mounted near the circumferential edge of said cover lower axial face at a location so as to be in a mating position when said cover is in said closed position.
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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |