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公开(公告)号:US3638691A
公开(公告)日:1972-02-01
申请号:US3638691D
申请日:1970-02-09
申请人: PETTIBONE CORP
发明人: LARSON ROBERT A
CPC分类号: B23Q16/008 , Y10T83/4465 , Y10T83/5815 , Y10T83/6579 , Y10T83/6617
摘要: In a bumper system suitable for stopping tree trunks fed lengthwise in positions for cutting successive equal lengths from the trunk, a bumper system is provided which absorbs tree trunk momentum by dissipation of energy and stops the tree trunk in position for sawing. Subsequent binding of the cut lengths between the face of the bumper and the saw is prevented by further receding movement of the bumper. Using a three-port cylinder, the impact moves the piston inward to expel hydraulic fluid through the intermediate port in series with a relief valve which provides resistive back pressure. At the predetermined correct measuring position, the piston closes this intermediate port, temporarily stopping the bumper and the tree trunk. During cutting, the more remote port is opened and oil is supplied to the near port to retract the bumper out of the way.
摘要翻译: 在一个保险杠系统中,适用于停止沿躯干长度相等长度切割的位置的树干,提供一种保险杠系统,通过耗散能量吸收树干的动量,并将树干停在适当位置进行锯切。 通过保险杠的进一步的后退运动来防止保险杠的表面和锯之间的切割长度的后续装订。 使用三端口气缸,冲击使活塞向内移动,以通过中间端口排出液压流体,并与提供阻力背压的安全阀串联。 在预定的正确测量位置,活塞关闭该中间端口,暂时停止保险杠和树干。 在切割期间,更远的端口被打开,并且油被供应到近端口以将保险杠收回。
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公开(公告)号:US3550653A
公开(公告)日:1970-12-29
申请号:US3550653D
申请日:1967-08-07
申请人: PETTIBONE CORP
CPC分类号: A01G23/00 , B27B5/10 , Y10T83/4443 , Y10T83/541 , Y10T83/6569
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