Patent US4294243A successfully refreshed from Google Patents.
US4294243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirators
Assignee: United States, SECRETARY OF UNITED STATES AIR FORCE, Secretary of
•
Filing: 1978-12-08
•
Granted: 1981-10-13
•
Expires: 1998-12-08
Abstract
Abstract The invention provides a nose occlusion facility on respirators of the type in which a hood and visor combination envelops the head of a wearer and carries an oronasal mask for supplying respiratory gas to the wearer. The nose occlusion facility is manually operable and comprises a lever device mounted on the exterior of the visor and associated with arms operative to pinch the wearer's nose in the region of the lobes thereof.
Inventors
- 👤 John Ernsting
- 👤 Thomas R. Morgan
- 👤 Leonard F. W. Palmer
- 👤 Alfred J. Rivers
- 👤 Stephen M. Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:44
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/06; A62B18/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
An oro-nasal respirator, comprising: a. a visor; b. a mask carried by said visor, said mask having a shape adapted to cover the nose and mouth of the wearer; c. means for providing respiratory gas to the wearer through said mask; d. means attached to said mask for selectively occluding the wearer's nose; said last mentioned means including a pair of spaced apart pivots penetrating through said mask in the nasal region thereof; yoke arms extending radially from said pivots on the inside of said mask; a handle secured to said pivots on the outside of said mask; said handle operable to rotate said pivots and cause said yoke arms to turn into the sides of the wearer's nose.
Claim 2
Dependent Claim
119 words
An oro-nasal respirator, comprising: a. a visor; b. a mask carried by said visor, said mask having a shape adapted to cover the nose and mouth of the wearer; c. means for providing respiratory gas to the wearer through said mask; d. means attached to said mask for selectively occluding the wearer's nose; said last mentioned means including a pair of spaced apart pivots penetrating through said mask in the nasal region thereof; yoke arms extending radially from said pivots on the inside of said mask; a handle secured to said pivots on the outside of said mask; said handle operable to rotate said pivots and cause said yoke arms to turn into the sides of the wearer's nose.
Claim 3
Dependent Claim
16 words
The device of claim 1 wherein said yoke arms have cylindrical bead members rotatably mounted thereon.
Claim 4
Dependent Claim
20 words
The device of claim 1 wherein said visor includes a transparent portion adapted to cover the eyes of the wearer.
Claim 5
Dependent Claim
16 words
The device of claim 1 wherein said yoke arms are made of a manually pliable metal.
Claim 6
Dependent Claim
29 words
The device of claim 1 wherein said mask includes adjustable means for urging the mask in sealing engagement with the face of the wearer around the nose and mouth.
Claim 7
Dependent Claim
13 words
The device of claim 1 wherein said pivots are sealed to the mask.
Claim 8
Dependent Claim
14 words
The device of claim 1 wherein said mask is made of flexible rubber material.
Claim 9
Dependent Claim
29 words
The device of claim 1 wherein said spaced apart pivots lie on a common lateral axis and said yoke arms rotate in a direction generally perpendicular to said axis.
References Cited (Backward Citations)
US1978994A
Cited
DE754529C
Cited
DE891655C
Cited
US3438060A
Cited
GB1222570A
Cited
US4077068A
Cited
US4090511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |