Invention Grant
- Patent Title: Liftable puller device
- Patent Title (中): 可拆卸牵引装置
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Application No.: US13331029Application Date: 2011-12-20
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Publication No.: US08763991B2Publication Date: 2014-07-01
- Inventor: Yu-Lin Chen
- Applicant: Yu-Lin Chen
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Main IPC: B23Q1/00
- IPC: B23Q1/00

Abstract:
A liftable puller device includes a holder, a puller assembly located on the holder, a first frame coupled with the holder and a second frame coupled with the puller assembly. The puller assembly is installed on the holder via the first frame and second frame, and includes a plurality of grippers to grip a wheel. The first frame has a first main retaining zone located on the top end thereof, two first sub retaining zones relative to the first main retaining zone and a first auxiliary retaining zone between the first main retaining zone and one first sub retaining zone. By providing the first auxiliary retaining zone, only a small range of movement is needed to complete switch between a two-gripper and a multi-gripper puller device.
Public/Granted literature
- US20130153842A1 LIFTABLE PULLER DEVICE Public/Granted day:2013-06-20
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