US4920576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visor-type mask for dentists
Assignee: Individual
•
Filing: 1989-01-17
•
Granted: 1990-05-01
•
Expires: 2009-01-17
Abstract
Abstract An improvement upon other inventions of Applicant wherein a visor which is attached to the head of the user supports a shield which hangs in front of the face of the wearer, protecting the eyes, nose and mouth from contamination which might be carried by dental and medical patients or in other environments. This invention differs in that the support of the shield is accomplished by forward extending tabs on the forward edge of the visor projecting into slots formed near the upper edge of the shield.
Inventors
- 👤 Timothy J. Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:04
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1184; Y; Y10; Y10S; Y10S2/00; Y10S2/901; Y10S2/908; Y10S2/909
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
171 words
A face mask comprising a visor, said visor comprising first means comprising a bill for engaging or lying against the forehead, said bill projecting forwardly above eye level and second means for attaching the visor to the head of the wearer, said bill being formed with first cooperating means extending along the outer edge of said bill, said first cooperating means comprising a plurality of projections spaced along said outer edge of said bill, and a shield transparent over at least a substantial portion of its area, said shield having an upper edge, second cooperating means on said shield shaped and positioned to engage said first cooperating means so that said shield is supported by said visor, said shield being dimensioned to extend down below the mouth and around the face, said second cooperating means comprising spaced slits in said shield dimensioned to receive and retain said projections, said shield having its upper edge disposed above said bill and being further disposed in contact with said outer edge of said bill.
Claim 2
Dependent Claim
171 words
A face mask comprising a visor, said visor comprising first means comprising a bill for engaging or lying against the forehead, said bill projecting forwardly above eye level and second means for attaching the visor to the head of the wearer, said bill being formed with first cooperating means extending along the outer edge of said bill, said first cooperating means comprising a plurality of projections spaced along said outer edge of said bill, and a shield transparent over at least a substantial portion of its area, said shield having an upper edge, second cooperating means on said shield shaped and positioned to engage said first cooperating means so that said shield is supported by said visor, said shield being dimensioned to extend down below the mouth and around the face, said second cooperating means comprising spaced slits in said shield dimensioned to receive and retain said projections, said shield having its upper edge disposed above said bill and being further disposed in contact with said outer edge of said bill.
Claim 3
Dependent Claim
39 words
A mask according to claim 1 in which said visor is initially formed of a flat sheet of material which is bendable to assume a visor shape when said second means is brought around the back of the head.
Claim 4
Dependent Claim
31 words
A mask according to claim 2 in which said second means comprises a first and a second narrow tail, said tails having cooperating fastening means to adjustably fit around the head.
Claim 5
Dependent Claim
42 words
A mask according to claim 1 in which said second means comprises a member formed of a length of elastic material dimensioned to fit behind the head of the wearer and having attachment means on each end engageable with said first means.
Claim 6
Dependent Claim
28 words
A mask according to claim 1 in which said projections are dovetail, having a maximum width greater than the length of said slits when said visor is unstressed.
Claim 7
Dependent Claim
16 words
A mask according to claim 5 in which the outer edges of said projections are rounded.
Claim 8
Dependent Claim
65 words
A mask according to claim 1 in which said second means is formed by a hole in said visor, said visor being of a continuous piece of material having an integral narrow band around one end of said hole adapted to fit around the back of the head of the wearer, said visor having said bill on the side of said hole opposite said band.
Claim 9
Dependent Claim
41 words
A face mask for surgeons and surgical personnel according to claim 1 in which said second means comprises a disposable surgeon's cap having head covering means terminating in a lower edge, and means for attaching said lower edge to said bill.
Claim 10
Dependent Claim
25 words
A mask according to claim 8 in which said cap is made of a paper-like substance and has a crown and sides around said crown.
Claim 11
Dependent Claim
33 words
A mask according to claim 8 in which said cap is formed with a reinforcing binding along said lower edge, said binding extending rearward to form ties, said ties comprising said second means.
Claim 12
Dependent Claim
55 words
A device according to claim 1 in which said visor is of a sponge rubber-like material and said projections are wider at their outer ends than their inner ends, whereby when said projections are forced through said slits said projections deform and then return to original shape to retain said shield suspended from said visor.
Claim 13
Dependent Claim
93 words
A mask according to claim 1 in which said visor and said shield comprise a unitary blank of thin, transparent material, said bill having a curved inner edge to conform to the shape of the forehead of the wearer and a curved outer edge, a hinge section on said outer edge, said hinge section being hingedly connected to said upper edge of said shield, said first and second cooperating means being cooperable to be engaged to cause the top edge of said shield to conform substantially to the shape of said outer edge.
Claim 14
Dependent Claim
43 words
A device according to claim 12 in which said upper edge is substantially straight and said blank is formed with cuts extending inward and constituting extensions of said top edge, the inner ends of said cuts being spaced apart by said hinge section.
Claim 15
Dependent Claim
25 words
A device according to claim 12 which further comprises a protective pad on said inner edge and means securing said pad to said spacer portion.
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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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |