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公开(公告)号：US11709044B2
公开(公告)日：2023-07-25
申请号：US17381506
申请日：2021-07-21
IPC分类号： G01B3/10 , G01B3/1005 , G01B3/1041 , G01B3/1056
CPC分类号： G01B3/1005 , G01B3/1041 , G01B3/1056 , G01B2003/103 , G01B2003/1038 , Y10T29/49609
摘要： A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.
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公开(公告)号：US20230314114A1
公开(公告)日：2023-10-05
申请号：US18329869
申请日：2023-06-06
IPC分类号： G01B3/1005 , G01B3/1041 , G01B3/1056
CPC分类号： G01B3/1005 , G01B3/1041 , G01B3/1056 , G01B2003/1038 , G01B2003/103 , Y10T29/49609
摘要： A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.
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公开(公告)号：US11092418B2
公开(公告)日：2021-08-17
申请号：US15890987
申请日：2018-02-07
IPC分类号： G01B3/1005 , G01B3/1041 , G01B3/1056
摘要： A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.
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公开(公告)号：US20210348906A1
公开(公告)日：2021-11-11
申请号：US17381506
申请日：2021-07-21
IPC分类号： G01B3/1005 , G01B3/1041 , G01B3/1056
摘要： A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.
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公开(公告)号：US20180224263A1
公开(公告)日：2018-08-09
申请号：US15890987
申请日：2018-02-07
IPC分类号： G01B3/10
CPC分类号： G01B3/1005 , G01B3/1041 , G01B3/1056 , G01B2003/103 , G01B2003/1038
摘要： A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.
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