US4674136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety mask construction
Assignee: Individual
•
Filing: 1986-05-12
•
Granted: 1987-06-23
•
Expires: 2006-05-12
Abstract
Abstract A safety mask construction comprises a substantially rigid face portion which is receivable over a portion of the face of a wearer and a pair of substantially rigid arm portions which extend rearwardly and inwardly from opposite sides of the face portion for engagement with the rear and upper rear portions of the head of the wearer. The arm portions are preferably hingeably attached to the face portion and biased toward inwardly hinged positions so that when the safety mask is mounted on the head of the wearer, they resiliently embrace the head to retain the face portion in proper orientation thereon.
Inventors
- 👤 Christopher G. Ladewig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:33
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
230 words
A safety mask construction comprising a substantially rigid face portion which is dimensioned and configured to be received in covering relation over at least a portion of the face of a wearer of said mask and a pair of substantially rigid arm portions which normally extend rearwardly and together from opposite side extremities of said face portion, said arm portions being resiliently separable from each other for installing said safety mask on the head of said wearer and each having an upper portion which extends inwardly, rearwardly, and upwardly from an upper side portion of said face portion and embraces a portion of the head of said wearer which faces rearwardly and upwardly when said mask is installed on said head and said head is in an upright disposition in order to resist downward movement of said mask on said head a lower portion which is downwardly spaced from said upper portion and embraces a portion of said head which faces rearwardly but not upwardly when said mask is installed on said head and said head is in an upright disposition, and a terminal portion which extends between the respective upper and lower portions thereof, said terminal portions being disposed in closely adjacent relation and embracing portions of said head which face predominantly rearwardly when said mask is installed on said head and said head is in an upright disposition.
Claim 2
Dependent Claim
230 words
A safety mask construction comprising a substantially rigid face portion which is dimensioned and configured to be received in covering relation over at least a portion of the face of a wearer of said mask and a pair of substantially rigid arm portions which normally extend rearwardly and together from opposite side extremities of said face portion, said arm portions being resiliently separable from each other for installing said safety mask on the head of said wearer and each having an upper portion which extends inwardly, rearwardly, and upwardly from an upper side portion of said face portion and embraces a portion of the head of said wearer which faces rearwardly and upwardly when said mask is installed on said head and said head is in an upright disposition in order to resist downward movement of said mask on said head a lower portion which is downwardly spaced from said upper portion and embraces a portion of said head which faces rearwardly but not upwardly when said mask is installed on said head and said head is in an upright disposition, and a terminal portion which extends between the respective upper and lower portions thereof, said terminal portions being disposed in closely adjacent relation and embracing portions of said head which face predominantly rearwardly when said mask is installed on said head and said head is in an upright disposition.
Claim 3
Dependent Claim
25 words
In the safety mask of claim 1, said arm portions embracing said head in resiliently biased engagement therewith when said safety mask is installed thereon.
Claim 4
Dependent Claim
33 words
In the safety mask of claim 1, said arm portions being hingeably attached to opposite side extremities of said face portion, said safety mask further comprising means for biasing said arm portions together.
Claim 5
Dependent Claim
48 words
In the safety mask of claim 1, said face portion being dimensioned and configured to cover substantially the entire face of said wearer and being positionable in substantially sealed engagement therewith, said face portion further comprising respirator means for filtering air which is introduced into said face portion.
Claim 6
Dependent Claim
71 words
In the safety mask of claim 1, said face portion being constructed so that the side extremities thereof are disposed in front of the ears of said wearer when said safety mask is installed on said head, said safety mask further comprising ear protector means mounted on said arm portions and positioned thereon so that they cover the ears of said wearer when said safety mask is mounted on said head.
Claim 7
Dependent Claim
47 words
In the safety mask of claim 5, said arm portions being hingeably attached to opposite side extremities of said face portion, said safety mask further comprising means for biasing said arm portions together and also for biasing said ear protector means into covering relation over said ears.
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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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |