Retraction device and feed mechanism having the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11491677
APP PUB NO 20200316805A1
SERIAL NO

16765504

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A retraction device includes: a spindle, a support plate and a plurality of spring washers. The spindle is movable along an axis direction thereof and has a first end; a support plate has a fixed position, the first end of the spindle penetrates the support plate; and the plurality of spring washers are fitted over the first end of the spindle and stacked together in an identical direction. The plurality of spring washers are compressed between the spindle and the support plate with a predetermined pre-load. The spindle is configured to be switchable between a first position and a second position, and capable of moving a predetermined distance relative to the support plate in the axis direction of the spindle during switching. When in the first position, the spindle is farthest from the support plate, when in the second position, the spindle is closest to the support plate.

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Patent Owner(s)

  • LEICA MICROSYSTEMS LTD. SHANGHAI

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fan, Zheguang Shanghai, CN 22 35
Liang, Xiang Shanghai, CN 9 29
Zhou, Gang Shanghai, CN 126 817

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