Straddle loader
First Claim
1. A straddle loader for lifting a load, the straddle loader comprising:
- an upper frame having a means for lifting the load and a compartment for an operator;
at least two traveling frames for receiving the load;
a drive operable for propulsion of the straddle loader along an underlying ground surface;
a lifting system connected to the upper frame and to the at least two traveling frames and operable for varying a distance between the upper frame and the at least two traveling frames by uniformly transferring the load to the at least two traveling frames so that the upper frame and the at least two traveling frames remain parallel and perpendicular, a plurality of telescoping beams associated with the lifting system so that at least two telescoping beams are associated with each of the at least two traveling frames, each said telescoping beam being capable of extension and retraction;
stationary pivot shafts for connecting each end of each of the plural telescoping beams to a respective one of the upper frame and of the at least two traveling frames; and
a pressure cylinder associated with each of the plural telescoping beams, the pressure cylinder being operably mounted between one of the at least two traveling frames and the respective one of the plural telescoping beams associated with the one of the plural traveling frames for exerting a force on the respective one of the plural telescoping beams simultaneous with extension of the respective telescoping beam.
1 Assignment
0 Petitions
Accused Products
Abstract
A straddle loader for lifting a load includes an upper frame having a spreader for grasping the load, a compartment for an operator, at least two traveling frames for receiving the load, and a lifting system connected to the upper frame and the plural traveling frames. The lifting system varies the distance between the upper frame and the plural traveling frames by uniformly transferring the load to the traveling frames so that the upper frame and the traveling frames remain parallel and perpendicular. The straddle loader further includes a plurality of telescoping beams associated with the lifting system so that at least two telescoping beams are connected to each of the traveling frames. Each telescoping beam is capable of extension and retraction. Stationary pivot shafts connect each end of each of the telescoping beams to the respective upper frame or traveling frame and to a pressure cylinder associated with each of the telescoping beams. The pressure cylinder is operatively mounted between one of the traveling frames a the respective one of the telescoping beams associated with the one frame and exerts a force on the respective telescoping beam simultaneous with extension of the telescoping beam.
8 Citations
17 Claims
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1. A straddle loader for lifting a load, the straddle loader comprising:
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an upper frame having a means for lifting the load and a compartment for an operator;
at least two traveling frames for receiving the load;
a drive operable for propulsion of the straddle loader along an underlying ground surface;
a lifting system connected to the upper frame and to the at least two traveling frames and operable for varying a distance between the upper frame and the at least two traveling frames by uniformly transferring the load to the at least two traveling frames so that the upper frame and the at least two traveling frames remain parallel and perpendicular, a plurality of telescoping beams associated with the lifting system so that at least two telescoping beams are associated with each of the at least two traveling frames, each said telescoping beam being capable of extension and retraction;
stationary pivot shafts for connecting each end of each of the plural telescoping beams to a respective one of the upper frame and of the at least two traveling frames; and
a pressure cylinder associated with each of the plural telescoping beams, the pressure cylinder being operably mounted between one of the at least two traveling frames and the respective one of the plural telescoping beams associated with the one of the plural traveling frames for exerting a force on the respective one of the plural telescoping beams simultaneous with extension of the respective telescoping beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification