公开(公告)号：WO1997038604A1

公开(公告)日：1997-10-23

申请号：PCT/US1997005963

申请日：1997-04-10

Applicant: HON INDUSTRIES INC.

Inventor： HON INDUSTRIES INC. ,  WEINSCHENK, Lavern, L., Jr. ,  MACHAEL, Jay, R.

IPC: A47B09/00

CPC classification number: A47B9/02

Abstract: A height adjustable load support structure (20) has a base frame (22), and a generally planar support surface (32). Preferably, two extendable vertical support assemblies (26) support the surface (32) for vertical movement relative to the base frame (22). Each support assembly (26) is engaged by a spring biased pivotable arm (42) to counterbalance the weight placed on the surface (32). A cam system (44, 46) cooperating between the distal ends of the pivotable arms (42) and the support assemblies (26) serves to compensate for the changing spring force on the arms by varying the effective moment arms of the arms (42) thereby equalizing the force on each support assembly through its complete range of vertical travel.

Abstract translation: 高度可调负载支撑结构（20）具有基座框架（22）和大致平面的支撑表面（32）。 优选地，两个可延伸的垂直支撑组件（26）支撑表面（32）以相对于基座框架（22）垂直移动。 每个支撑组件（26）由弹簧偏压的可枢转臂（42）接合，以平衡放置在表面（32）上的重量。 在可枢转臂（42）的远端和支撑组件（26）之间配合的凸轮系统（44,46）用于通过改变臂（42）的有效力矩臂来补偿臂上的变化的弹簧力， 从而通过其垂直行程的完整范围来均衡每个支撑组件上的力。