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 Title: |
US3813696:
POWER VENTILATED HELMET
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Yeager, Garlen F.; St. Louis County, MO 63137
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| Assignee: |
None
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| Published / Filed: |
1974-06-04
/ 1972-11-13
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| Application Number: |
US1972000306005
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| IPC Code: |
Advanced:
A42B 3/28;
IPC-7:
A42C 5/04;
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| ECLA Code: |
A42B3/28D;
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| U.S. Class: |
Current:
002/171.3;
002/183;
002/906;
416/063;
416/146.R;
Original:
002/171.3;
002/183;
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| Field of Search: |
002/171.3,182.1,182.7,183,3 A,8
128/145,142.3
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| Priority Number: |
| 1972-11-13 |
US1972000306005 |
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| Abstract: |
A power ventilated helmet having an opening in the crown portion thereof for the passage of air therethrough and an adjustable headband for supporting the helmet on the wearer's head. One or more air passages are provided in the space between the inner surface of the headband and the inner surface of the helmet, and compressible foam material is disposed between the headband and the helmet for substantially blocking the flow of air between the helmet and the headband. The helmet further includes a blower operable either to draw air in through the wearer's head and to exhaust the air downwardly through the air passages over the wearer's head, or to draw air in through the air passages up over the wearer's face and head, to draw it between the inner surface of the helmet and the wearer's head and then to exhaust it from the opening. These air passages are of substantially constant cross sectional area regardless of the size to which the headband is adjusted to insure that the blower forces air through the air passages at a desired rate regardless of the size to which the headband is adjusted.
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| Primary / Asst. Examiners: |
Franklin, Jordan; Nerbun, Peter
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| Family: |
None
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First Claim:
Show all 8 claims |
What is claimed is:
1. A power ventilated helmet having a crown portion, an opening in the crown portion for the passage of air therethrough, means for supporting the helmet on the wearer's head including a generally horizontal headband encircling the head and being adjustable within a limited range to fit most wearers, said headband being secured to and spaced from the inner surface of the crown portion of said helmet, means secured to the inner surface of the headband and movable with said headband upon adjustment of the headband for defining one or more air passages in the space between the inner surface of said headband and the inner surface of the crown portion of the helmet, compressible material disposed between said means defining said air passages and the crown portion of the helmet for substantially blocking the flow of air in the space between the air passage defining means and the inner surface of said crown portion, and power operated blower means carried by the helmet operable either to draw air in through said opening, to blow it between the inner surface of the crown portion of the helmet and the wearer's head, and to exhaust the air downwardly through said air passages over the wearer's head, or to draw air in through said air passages up over the wearer's head, to draw it between the inner surface of the crown portion of the helmet and the wearer's head and to exhaust it from said opening, said compressible material being expansible and compressible to block the space between the air passage defining means and the inner surface of the crown portion, said air passages being of substantially constant cross sectional area regardless of the size to which the headband is adjusted thereby to insure that said blower means forces air over the wearer's head in a predetermined pattern regardless of the size to which said headband is adjusted.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 16 U.S. patent(s) that reference this one
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