초록 ▼

A load balancing mechanism includes an inner support bracket, a load support bracket end a pair of parallel support arms which join the inner support bracket and the load support bracket together. The arms are supported by a load balancing cylinder arrangement which offsets the weight of loads suppo

A load balancing mechanism includes an inner support bracket, a load support bracket end a pair of parallel support arms which join the inner support bracket and the load support bracket together. The arms are supported by a load balancing cylinder arrangement which offsets the weight of loads supported on the load support bracket and permits the arms to be raised and lowered manually by a user even when the load is heavy. The opposite ends of the support arms are joined to the brackets by a pivot pin and a pair of bearing assemblies such that each connection between an end of an arm and a bracket is supported by two bearing assemblies at the opposite ends of the pivot pin. This arrangement permits removal and maintenance of one bearing assembly while the other bearing assembly remains in load-bearing engagement to support the load.

대표청구항 ▼

[ What is claimed is:] [1.] A support arm arrangement for balancing loads comprising:a support;an arm assembly which is pivotally connected to said support to support loads thereon, said arm assembly comprising an inner bracket fixedly connected to said support, an outer bracket which is adapted to

[ What is claimed is:] [1.] A support arm arrangement for balancing loads comprising:a support;an arm assembly which is pivotally connected to said support to support loads thereon, said arm assembly comprising an inner bracket fixedly connected to said support, an outer bracket which is adapted to support a load thereon and an arm extending between said inner bracket and said outer bracket, opposite ends of said arm being pivotally connected to said inner bracket and said outer bracket respectively to permit pivoting of said arm assembly in a vertical plane, each of said inner bracket and said outer bracket including at least one support section and first and second pin sections which project horizontally from said support section, said first and second pin sections being coaxially aligned to define a horizontal pivot axis about which said arm pivots, each of said opposite ends of said arm including horizontally spaced apart support flanges which project toward said pin sections, each of said pin sections being pivotally connected to a corresponding one of said support flanges by a bearing unit wherein said bearing unit permits relative movement between said pin section and said corresponding support flange, each of said bearing units defining a load bearing connection between said first pin section and said corresponding support flange during removal of another said bearing unit from said coaxially aligned second pin section; anda load balancing mechanism connected between said support and said arm for balancing the load being carried on said arm assembly.