发明授权
- 专利标题: Hoisting apparatus
- 专利标题(中): 起重设备
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申请号: US916850申请日: 1978-06-19
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公开(公告)号: US4221996A公开(公告)日: 1980-09-09
- 发明人: Motoi Shimizu , Masaaki Miyazaki , Seiji Oh-Higashi
- 申请人: Motoi Shimizu , Masaaki Miyazaki , Seiji Oh-Higashi
- 申请人地址: JPX Tokyo
- 专利权人: Senoh Kabushiki Kaisha
- 当前专利权人: Senoh Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 主分类号: H02P23/00
- IPC分类号: H02P23/00 ; H02P1/22 ; H02P1/40
摘要:
A hoisting apparatus and a control circuit therefor comprising a reversible electric motor drivingly connected to a hoisting drum for hauling an object up and down. The control circuit includes first and second photosensitive elements each responsive to a light beam for initiating rotation of the electric motor in either direction and means for terminating rotation of the electric motor.
公开/授权文献
- US6010049A Carrier for a trailer-hitch receiver 公开/授权日:2000-01-04
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