发明名称 |
Fastening means for fitting an accessory, especially an ear muff, to a safety helmet |
摘要 |
A fastening means for fitting an ear muff to a safety helmet has an arm which is mounted in a housing intended for attaching to the helmet. A pivoting end portion of the arm situated in the housing is acted on by a disc-type spring means arranged in the housing. The line of action of the spring force has a decreasing leverage to the pivoting location of the arm for increasing arm swing-out, the pivoting moment exercised by the spring means on the arm being substantially constant within a swing-out range normal for the arm when it is in use. This results in a contact force for the ear muff which is essentially independent of the amount of swing-out.
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申请公布号 |
US4287614(A) |
申请公布日期 |
1981.09.08 |
申请号 |
US19800151595 |
申请日期 |
1980.05.20 |
申请人 |
LOENNSTEDT, BO G. |
发明人 |
LOENNSTEDT, BO G. |
分类号 |
F16C11/04;A42B1/24;A42B3/16;F16C11/06;G10K11/16;(IPC1-7):A42B3/00 |
主分类号 |
F16C11/04 |
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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