Sight correction attachment for respirators

Details Sight correction attachment for respirators Sight correction attachment for respirators

1985-12-09

1987-12-01

Kamm, William E.

Surgery

Respiratory method or device

Corrective or magnifying lens combined with face mask having...

2441, 351 86, A62B 1008, A61F 902

Patent

active

047096969

ABSTRACT:
A sight-corrective lens is attached between an eyepiece of a respirator and the eye of the wearer by a monocular mount into which the lens fits as if into a standard spectacle frame. Attachment devices for the mount are apertured lugs on a surround of the eyepiece and tabs on the mount. By making the tab and mount in one position of different tangential width from the tab and mount in the other, a desired unique positioning of the lens is assured. The mount may have a seal ring of which the deformable ridge is pretensioned against the eyepiece by the fitting of the tabs in the lugs to prevent ingress of moisture or particles between them.

REFERENCES:
patent: 1923567 (1933-08-01), Baker
patent: 2427918 (1947-09-01), Malcom et al.
patent: 2846684 (1958-08-01), Hill
patent: 3552840 (1971-01-01), Braget
patent: 4056853 (1977-11-01), Bohazzini et al.
patent: 4338009 (1982-07-01), Vosper

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