发明名称 |
Sight correction attachment for respirators |
摘要 |
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.
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申请公布号 |
US4709696(A) |
申请公布日期 |
1987.12.01 |
申请号 |
US19850806463 |
申请日期 |
1985.12.09 |
申请人 |
AVON INDUSTRIAL POLYMERS LIMITED |
发明人 |
ANGELL, CYRIL N. E. |
分类号 |
G02C3/00;A61F9/02;A62B18/08;(IPC1-7):A61F9/02 |
主分类号 |
G02C3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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