发明授权
- 专利标题: Hydraulic jack cushioning apparatus
- 专利标题(中): 液压千斤顶缓冲装置
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申请号: US716847申请日: 1976-08-23
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公开(公告)号: US4065112A公开(公告)日: 1977-12-27
- 发明人: Edward V. Leskovec , Ralph D. Porter
- 申请人: Edward V. Leskovec , Ralph D. Porter
- 申请人地址: OH Mentor
- 专利权人: Towmotor Corporation
- 当前专利权人: Towmotor Corporation
- 当前专利权人地址: OH Mentor
- 主分类号: B66F3/32
- IPC分类号: B66F3/32 ; B66F9/22 ; F15B15/22 ; B66F3/24
摘要:
Cushioning apparatus for cushioning a hydraulic jack is disclosed which includes a plunger reciprocably mounted within a blind bore. The plunger sequentially closes off a plurality of axially spaced orifices provided through the wall of the bore as the plunger moves from a first position adjacent the open end of the bore to a second position adjacent its closed end, thereby progressively restricting the escape of fluid from the bore so as to slow the movement of one of the telescopic members of the jack toward another.
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