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US08506142B2 Resettable break-away joint for a pole assembly 失效
一个杆组件的可复位拆卸接头

Resettable break-away joint for a pole assembly
Abstract:
A resettable break-away joint for a pole assembly includes a lower end of an upper pole member and an upper end of a lower pole member. A biasing mechanism urges the lower end of the upper pole member toward engagement with the upper end of the lower pole member to urge the upper pole member toward an upright position until the upper pole member is moved to a collapsed position.
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