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1. 发明授权

US4858723A Bucket leveling system 失效
标题翻译：铲斗调平系统
公开(公告)号：US4858723A
公开(公告)日：1989-08-22
申请号：US226144
申请日：1988-07-29
申请人： William K. Holmes , John J. Mlaker
发明人： William K. Holmes , John J. Mlaker
IPC分类号： B66F11/04
CPC分类号： B66F11/044
摘要： An aerial lift includes a bucket mounted at the outer end of an articulated boom assembly having upper and lower booms. A hydraulic cylinder is provided for extending the upper boom relative to the lower boom, and a rotary actuator is provided for varying the rotational position of the bucket relative to the upper boom. An auxiliary cylinder, actuated in response to actuation of the upper boom hydraulic cylinder, provides hydraulic fluid to the rotary actuator so as to maintain the bucket in a substantially level position as the articulated boom assembly is raised and lowered. The load train including a chain and sector-shaped sprocket automatically compensate upper boom angle for changes in the angle of the lower boom relative to horizontal so that the rotary actuator is actuated only in response to actual changes in the angular position of the upper boom relative to horizontal.
摘要翻译：升降机包括安装在具有上部和下部吊臂的铰接式起重臂组件的外端的铲斗。提供液压缸用于相对于下悬臂延伸上臂，并且提供旋转致动器以改变铲斗相对于上起重臂的旋转位置。响应于上臂液压缸的致动致动的辅助气缸向旋转致动器提供液压流体，以便当铰接悬臂组件升高和降低时将铲斗保持在基本水平的位置。包括链条和扇形链轮的负载系统自动补偿上臂的角度，用于下臂相对于水平面的角度的变化，使得旋转致动器仅仅响应于上起重臂相对的角位置的实际变化而被致动到水平。

2. 发明授权

US4763800A Mobile lifting apparatus 失效
标题翻译：移动式起重设备
公开(公告)号：US4763800A
公开(公告)日：1988-08-16
申请号：US848448
申请日：1986-03-19
申请人： Edgar D. Engler , Gus J. Weber , Melvin G. Stapel , John J. Mlaker , Leonard Hanson
发明人： Edgar D. Engler , Gus J. Weber , Melvin G. Stapel , John J. Mlaker , Leonard Hanson
IPC分类号： B66F7/20 , B66F9/06 , B66F9/075 , B66C23/72
CPC分类号： B66F9/06 , B66F7/20 , B66F9/07554
摘要： A mobile lifting apparatus has a chassis with front driving wheels and steerable rear wheels. A vertical mast comprised of a pair of extendible hydraulic cylinders is spacedly mounted on the front of the chassis. One or more jam stay cylinders are mounted on the chassis rearwardly of the vertical mast. A pair of extendable booms are mounted on the vertical mast and jam stay cylinders. The load may be attached to the end of the booms. A hydraulic or other power supply extends and retracts the boom and drives the driving wheels. A counterweight is mounted on the rear of the chassis and the chassis may be extended to increase the capacity and stability of the lifting apparatus.
摘要翻译：移动提升装置具有带有前驱动轮和可转向后轮的底盘。由一对可伸缩液压缸构成的立式桅杆间隔地安装在机架的前部。一个或多个卡车停止缸在垂直桅杆后方安装在底盘上。一对可伸缩的吊杆安装在垂直桅杆和堵塞保持缸上。负载可以附接到起重臂的末端。液压或其他电源延伸和缩回起重臂并驱动驱动轮。配重安装在底盘的后部，并且底盘可以延伸以增加提升装置的容量和稳定性。

3. 发明授权

US5746286A Hydraulic boom platform leveling system 失效
标题翻译：液压臂平台调平系统
公开(公告)号：US5746286A
公开(公告)日：1998-05-05
申请号：US708718
申请日：1996-09-05
申请人： John J. Mlaker
发明人： John J. Mlaker
IPC分类号： B66F11/04
CPC分类号： B66F11/044
摘要： A platform leveling system for an aerial lift truck utilizes a master/slave combination of helical hydraulic rotary actuators to automatically level the work platform in response to movements of the boom. For a two-stage aerial lift comprised of a lower boom and an upper boom, a first rotary actuator is coupled to the base of the lower boom, a second rotary actuator is coupled to the elbow where the upper boom is hinged to the lower boom, and a third rotary actuator is coupled directly to the platform and upper boom. Movement of the lower boom relative to the base causes the first rotary actuator to displace a fixed amount of hydraulic fluid, and movement of the upper boom relative to the lower boom caused the second rotary actuator to disperse a fixed amount of hydraulic fluid. The displacement of hydraulic fluid in the first and second rotary actuators (the master units) causes an equal amount of displacement in the third rotary actuator (the slave unit), which results in articulating the platform in direct response to movement of the boom in order to maintain the platform in a level position.
摘要翻译：用于空中升降机的平台调平系统利用螺旋液压旋转致动器的主/从组合来响应于起重臂的运动来自动调平工作平台。对于由下悬臂和上起重臂组成的两级升降升降机，第一旋转致动器联接到下起重臂的底部，第二旋转致动器联接到肘部，其中上起重臂铰接到下起重臂，并且第三旋转致动器直接连接到平台和上起重臂。下起重臂相对于底座的运动导致第一旋转致动器移动固定量的液压流体，并且上起重臂相对于下起重臂的运动导致第二旋转致动器分散固定量的液压流体。第一和第二旋转致动器（主单元）中的液压流体的位移在第三旋转致动器（从属单元）中引起相等量的位移，这导致平台直接响应于起重臂的运动维持平台位置。

4. 发明授权

US4917214A Aerial lift bucket rotation device including bucket leveling means 失效
标题翻译：升降斗旋转装置包括铲斗平整装置
公开(公告)号：US4917214A
公开(公告)日：1990-04-17
申请号：US394753
申请日：1989-08-16
申请人： John J. Mlaker , William K. Holmes
发明人： John J. Mlaker , William K. Holmes
IPC分类号： B66F11/04
CPC分类号： B66F11/044
摘要： An aerial lift including an improved structure for supporting the bucket or platform and compensating for changing forces on the bucket support structure as the bucket rotates from a side hung position to a forward position. The compensating structure provides for leveling of the bucket when the bucket rotates from the side hung position to the forward position and such that the bucket will be maintained level in both the side hung position and the forward position.
摘要翻译：一种升降机，包括用于支撑铲斗或平台的改进的结构，并且当铲斗从侧挂位置向前移动时补偿铲斗支撑结构上的变化力。补偿结构提供了当铲斗从侧挂位置向前转动位置时铲斗的调平，并且铲斗将保持在侧挂位置和向前位置的水平。

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