A scissor lift has a pair of leg assemblies pivotally connected to a base. Relative movement between the legs and the base is opposed by spring assemblies that may be selectively connected to a carriage to vary the bias on the legs. A cam member secured to the leg acts on the carriage to modify the motion between the leg and the carriage to maintain a uniform vertical spring rate.
申请公布号
CA2152203(C)
申请公布日期
2005.03.29
申请号
CA19952152203
申请日期
1995.06.20
申请人
PENTALIFT EQUIPMENT CORPORATION
发明人
ROWAN, RICHARD T.;SUTHERLAND, LEONARD G.;COOKE, GARY;PEDERSEN, PAUL