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1.发明申请公开(公告)号：US20070292208A1
公开(公告)日：2007-12-20
申请号：US11763239
申请日：2007-06-14
IPC分类号： E01C19/38
CPC分类号： E01C19/402
摘要： A portable vibratory screed includes a blade that is connected to a handle constructed to be manipulated by an operator. Nodes of minimum vibrational amplitude are formed at specific locations along the length of the blade when the exciter is driven at a rated operating speed. A site level and/or the handle is attached to the blade at or in the vicinity of one or more of these nodes, therefore, is relatively isolated from induced vibrations.
摘要翻译： 便携式振动熨平板包括连接到构造为由操作者操纵的手柄的叶片。 当激励器以额定的运行速度被驱动时，在叶片的长度的特定位置处形成最小振动振幅的节点。 站点级和/或手柄在这些节点中的一个或多个节点附近或附近附接到叶片，因此与感应振动相对地隔离。
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公开(公告)号：US07172365B2
公开(公告)日：2007-02-06
申请号：US11228545
申请日：2005-09-16
IPC分类号： E01C19/22
CPC分类号： E04F21/248
摘要： A method is provided of making and using a walk behind rotary trowel that is “dynamically balanced” so as to minimize the forces/torque that the operator must endure to control and guide the trowel. Characteristics that are accounted for by this method include, but are not limited to, friction, engine torque, machine center of gravity, and guide handle position. As a result, dynamic balancing and consequent force/torque reduction were found to result when the machine's center of gravity was shifted substantially relative to a typical machine's center of gravity. Dynamic balancing can be achieved most practically by reversing the orientation of the engine relative to the guide handle assembly when compared to traditional walk behind rotary trowels and shifting the engine as far as practical to the right. This shifting has been found to reduce the operational forces and torque the operator must endure by at least 50% when compared to traditional machines.
摘要翻译： 提供了一种制造和使用“动态平衡”的旋转t刀后面的步行方法，以便最小化操作者必须忍受以控制和引导t刀的力/扭矩。 通过该方法考虑的特性包括但不限于摩擦，发动机扭矩，机器重心和导向手柄位置。 结果，当机器的重心相对于典型的机器重心基本上移动时，发现动态平衡和随之而来的力/扭矩降低。 与传统步行在后面的旋转t刀相比，将发动机相对于导向手柄组件的方位反转更为实际，可以实现动态平衡。 已经发现，与传统机器相比，操作人员必须忍受至少50％的操作力和扭矩。
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3.发明授权公开(公告)号：US07686538B2
公开(公告)日：2010-03-30
申请号：US11763239
申请日：2007-06-14
IPC分类号： E01C19/38
CPC分类号： E01C19/402
摘要： A portable vibratory screed includes a blade that is connected to a handle constructed to be manipulated by an operator. Nodes of minimum vibrational amplitude are formed at specific locations along the length of the blade when the exciter is driven at a rated operating speed. A site level and/or the handle is attached to the blade at or in the vicinity of one or more of these nodes, therefore, is relatively isolated from induced vibrations.
摘要翻译： 便携式振动熨平板包括连接到构造为由操作者操纵的手柄的叶片。 当激励器以额定的运行速度被驱动时，在叶片的长度的特定位置处形成最小振动振幅的节点。 站点级和/或手柄在这些节点中的一个或多个节点附近或附近附接到叶片，因此与感应振动相对地隔离。
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公开(公告)号：US06974277B2
公开(公告)日：2005-12-13
申请号：US10704105
申请日：2003-11-07
CPC分类号： E04F21/248
摘要： A walk behind rotary trowel is configured to be “dynamically balanced” so as to minimize the forces/torque that the operator must endure to control and guide the trowel. Characteristics that are accounted for by this design include, but are not limited to, friction, engine torque, machine center of gravity, and guide handle position. As a result, dynamic balancing and consequent force/torque reduction were found to result when the machine's center of gravity was shifted substantially relative to a typical machine's center of gravity. Dynamic balancing can be achieved most practically by reversing the orientation of the engine relative to the guide handle assembly when compared to traditional walk behind rotary trowels and shifting the engine as far as practical to the right. This shifting has been found to reduce the operational forces and torque the operator must endure by at least 50% when compared to traditional machines.
摘要翻译： 旋转t刀后面的步行被配置为“动态平衡”，以便最小化操作者必须忍受以控制和引导t刀的力/扭矩。 通过这种设计考虑的特性包括但不限于摩擦，发动机扭矩，机器重心和导向手柄位置。 结果，当机器的重心相对于典型的机器重心基本上移动时，发现动态平衡和随之而来的力/扭矩降低。 与传统步行在后面的旋转t刀相比，将发动机相对于导向手柄组件的方位反转更为实际，可以实现动态平衡。 已经发现，与传统机器相比，操作人员必须忍受至少50％的操作力和扭矩。
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