公开(公告)号：US3791627A

公开(公告)日：1974-02-12

申请号：US3791627D

申请日：1971-09-20

Applicant: ZIMMERMAN D W MFG

Inventor： STONE C ,  FOSTER E

IPC: B66D1/44 ,  B66D3/18 ,  B66D1/00

CPC classification number: B66D3/18 ,  B66D2700/026

Abstract: A pneumatically-operated hoist is operated through an automatic, pneumatic control system. The operation of the hoist is initiated through an external signal for the pneumatic control system by means of which the hoist is automatically directed through a plurality of sequential steps. The hoist preferably has at least two remotely-positioned bleed elements which are operated through the pneumatic control elements to control the hoist pressure at predetermined values in a manner such that an operator can manipulate a load with the hoist in a desired manner without having to operate any manual controls at all. The control system also is equipped with a bleed element which opens to slowly bleed the hoist in the event of air failure, so that a load carried by the hoist can be safely lowered.

Abstract translation: 气动提升机通过自动气动控制系统进行操作。 起重机的操作通过用于气动控制系统的外部信号启动，通过该外部信号，起重机通过多个顺序步骤自动引导。 起重机优选地具有至少两个远程定位的排放元件，其通过气动控制元件操作，以以预定值控制起重压力，使得操作者可以以期望的方式操纵起重机的载荷，而不必操作 任何手动控制器。 控制系统还配备有泄放元件，其在空气故障的情况下打开以缓慢地排出葫芦，从而可以安全地降低起重机承载的负载。