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 Title: |
US4711539:
Support structure for protective mask optical insert
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Krusas, James J.; Sturbridge, MA
Pienta, Joseph J.; Southbridge, MA
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| Assignee: |
American Optical Corporation, Southbridge, MA
other patents from AMERICAN OPTICAL CORPORATION (25915) (approx. 841)
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| Published / Filed: |
1987-12-08
/ 1985-06-18
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| Application Number: |
US1985000746178
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| IPC Code: |
Advanced:
A62B 18/08;
G02C 3/00;
G02C 9/02;
Core:
A62B 18/00;
G02C 9/00;
more...
IPC-7:
A61F 9/02;
G02C 1/00;
G02C 5/08;
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| ECLA Code: |
G02C3/02; A62B18/08A; G02C9/02;
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| U.S. Class: |
Current:
351/063;
002/444;
351/041;
351/158;
Original:
351/063;
351/158;
351/041;
002/444;
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| Field of Search: |
351/063,60,158,41
002/444
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| Priority Number: |
| 1985-06-18 |
US1985000746178 |
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| Abstract: |
An optical lens carrying support structure for use with a protective face mask, comprising a pair of lens frames, each frame comprising an eyewire and a hinge portion, the lens frames being connected by a hinged nosepiece. The support structure attaches to the face mask by a slideably releasable dove-tail connection to a trapezoidal back-block, which back-block rigidly attaches to the face mask, with two opposite faces of the trapezoidal back-block inclined with respect to each other so as to establish the proper pantoscopic angle. The face-form angle is accomplished by virtue of an angled relation of the eyewire to the hinge portion of the lens frame. The lens frames fold back toward each other, facilitating removal of the lenses and folding the face mask assembly flat.
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| Attorney, Agent or Firm: |
Lorusso & Loud ;
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| Primary / Asst. Examiners: |
Bovernick, Rodney B.;
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
AT BE CH DE FR GB IT LI LU NL SE
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| Family: |
Show 8 known family members
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First Claim:
Show all 10 claims |
Having thus described our invention, we claim:
1. Apparatus for supporting a protective mask optical insert to be used by a person wearing a protective face mask of the type having left and right face plates and a structural member between said face plates, said support apparatus comprising:
- (a) a hinged frame assembly, including:
- a pair of ring-shaped frames, each adapted to hold a single optical lens, each frame including:
- said frames being hingedly connected to each other by means of a spring loaded hinge that allows said frames to swing toward each other;
- each eyewire defining a plane in which the perimeter of said eyewire lies;
- means for maintaining a specified face-form angle defined by the intersection of the two said planes defined by each of the eyewires;
- (b) means for anchoring the hinged frame assembly to the protective mask;
- (c) means for permanently setting the pantoscopic angle between the user's face and the hinged frame assembly including a block having a trapezoidal cross-section, said trapezoidal block, having two pairs of parallel faces and a pair of faces inclined to each other, arranged so that a first face of the inclined pair is attachable to said anchoring means, and the second face of the inclined pair is attachable to the hinged frame assembly; and
- (d) slidably releasable means for attaching the hinged frame assembly to the means for setting the pantoscopic angle.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 27 U.S. patent(s) that reference this one
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