Patent US3911914A successfully refreshed from Google Patents.
US3911914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated head cover and safety hood
Assignee: COLLEY R GENE
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Filing: 1974-06-06
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Granted: 1975-10-14
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Expires: 1994-06-06
Abstract
Abstract A ventilated head cover having a rigid shell with insulation therein designed to retain cool air and to reduce noises from outside of the shell and having removably mounted insulation designed to reduce outside sounds and the sound from the air flow inside of the shell; said head cover being provided with a transparent, removably mounted eye shield and a removably mounted flexible neck collar designed to prevent entrance of gases from the outside, but permitting discharge of air from the inside of the head cover. Means are provided for the entrance of a controlled volume of clean air to keep the head of the user cool, and to maintain the eye shield clean, as well as to furnish air for the user to breathe, and to prevent entrance of gases from the outside, and the structure of the head cover being further designed to permit free movement of the head in the cover.
Inventors
- 👤 Sven-Olof Gustav Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
175 words
A ventilated hood having a rigid shell, said shell having a shield opening, a transparent shield releasably mounted over said shield opening, said shell having a user receiving opening, a flexible collar mounted on said shell, adjacent said receiving opening and an air conduit having a plurality of discharge ports mounted in said shell, said conduit having an entry at one end and extending from a point above the longitudinal center of the hood and over the inside top of the hood terminating at a point diametrically opposed to the entry point, an air connection in said shell extending transversely through one wall, said connection being movable into flow connection with the entry end of said conduit and a source of supply of air under pressure, a pair of flexible bands are stretched over and mounted on said shell, the margins of said bands adjacent said shell positioned over a portion of said shield adjacent the outer margins thereof to maintain said shield tightly against said shell and in said sealed relation with said shell.
Claim 2
Dependent Claim
175 words
A ventilated hood having a rigid shell, said shell having a shield opening, a transparent shield releasably mounted over said shield opening, said shell having a user receiving opening, a flexible collar mounted on said shell, adjacent said receiving opening and an air conduit having a plurality of discharge ports mounted in said shell, said conduit having an entry at one end and extending from a point above the longitudinal center of the hood and over the inside top of the hood terminating at a point diametrically opposed to the entry point, an air connection in said shell extending transversely through one wall, said connection being movable into flow connection with the entry end of said conduit and a source of supply of air under pressure, a pair of flexible bands are stretched over and mounted on said shell, the margins of said bands adjacent said shell positioned over a portion of said shield adjacent the outer margins thereof to maintain said shield tightly against said shell and in said sealed relation with said shell.
Claim 3
Dependent Claim
217 words
A ventilated hood having a rigid shell, said shell having a shield opening, a transparent shield releasably mounted over said shield opening, said shell having a receiving opening, a flexible collar mounted on said shell adjacent said receiving opening and an air conduit having a plurality of discharge ports mounted in said shell, said conduit having an entry at one end and extending from a point above the longitudinal center of the shell and over the inside top of the shell, terminating at a point diametrically opposed to the entry point, an air connection in said shell extending transversely through one wall, said connection being movable into flow connection with the entry end of said conduit and a source of supply of air under pressure said shell being cylindrical, the top thereof being domed and closed and the bottom thereof being open and said shell provided with a cork insulation on its side walls and a cool air retaining insulation on the inside top wall, said air conduit being mounted between said cork and cool air retaining insulation, said insulation pads being loosely mounted in said shell said collar including means for maintaining said cork and air cooling insulation in said shell thereby forming a sound barrier between said air conduit and the inside of said shell.
Claim 4
Dependent Claim
217 words
A ventilated hood having a rigid shell, said shell having a shield opening, a transparent shield releasably mounted over said shield opening, said shell having a receiving opening, a flexible collar mounted on said shell adjacent said receiving opening and an air conduit having a plurality of discharge ports mounted in said shell, said conduit having an entry at one end and extending from a point above the longitudinal center of the shell and over the inside top of the shell, terminating at a point diametrically opposed to the entry point, an air connection in said shell extending transversely through one wall, said connection being movable into flow connection with the entry end of said conduit and a source of supply of air under pressure said shell being cylindrical, the top thereof being domed and closed and the bottom thereof being open and said shell provided with a cork insulation on its side walls and a cool air retaining insulation on the inside top wall, said air conduit being mounted between said cork and cool air retaining insulation, said insulation pads being loosely mounted in said shell said collar including means for maintaining said cork and air cooling insulation in said shell thereby forming a sound barrier between said air conduit and the inside of said shell.
Claim 5
Dependent Claim
206 words
A ventilated hood having a rigid shell, said shell having a shield opening, a transparent shield releasably mounted over said shield opening, said shell having a receiving opening, a flexible collar mounted on said shell adjacent said receiving opening and an air conduit having a plurality of discharge ports mounted in said shell, said conduit having an entry at one end and extending from a point above the longitudinal center of the shell and over the inside top of the shell, terminating at a point diametrically opposed to the entry point, an air connection in said shell extending transversely through one wall, said connection being movable into flow connection with the entry end of said conduit and a source of supply of air under pressure, insulation pads are loosely mounted in the shell, said collar including means for maintaining said insulation pads in said shell, and a skirt is mounted on the lower margin of said shell, and said collar, shield and skirt are maintained detachably mounted on said shell by a pair of flexible bands stretched over said shell having their respective margins movable over and off of the margins of said collar, shield and skirt, to move same into and out of holding position.
Claim 6
Dependent Claim
206 words
A ventilated hood having a rigid shell, said shell having a shield opening, a transparent shield releasably mounted over said shield opening, said shell having a receiving opening, a flexible collar mounted on said shell adjacent said receiving opening and an air conduit having a plurality of discharge ports mounted in said shell, said conduit having an entry at one end and extending from a point above the longitudinal center of the shell and over the inside top of the shell, terminating at a point diametrically opposed to the entry point, an air connection in said shell extending transversely through one wall, said connection being movable into flow connection with the entry end of said conduit and a source of supply of air under pressure, insulation pads are loosely mounted in the shell, said collar including means for maintaining said insulation pads in said shell, and a skirt is mounted on the lower margin of said shell, and said collar, shield and skirt are maintained detachably mounted on said shell by a pair of flexible bands stretched over said shell having their respective margins movable over and off of the margins of said collar, shield and skirt, to move same into and out of holding position.
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |