Patent ID: 6305668
Filing Date: 2001-10-23
Classification: B66F,F15B

Abstract:
A compact lifter for lifting cargo and other loads to an elevated height, comprising:a base plate for supplying support to the compact lifter during operation,a lifting platen atop the compact lifter for carrying the cargo to the elevated height;an actuating cylinder attached to the lifting platen for extending the lifting platen upwardly to its desired height and location;at least a pair of guide shafts permanently attached to the lifting platen and also permanently attached to and extending upwardly from the base plate;a bearing plate sized similar to the lifting platen and being oriented in a substantially parallel fashion to the lifting platen;at least one first set of bearings surrounding each of the guide shafts, said first set of bearings being permanently attached to and received within said bearing plate by bearing housings, wherein the guide shafts are slidably extending through and connected to the bearing plate; andat least one second set of bearings surrounding each of the guide shafts in a position downward from the first set of bearings, said second set of bearings also receiving the same guide shafts in a slidably fashion such that the individual guide shafts are now secured simultaneously by at least two sets of bearings to ensure reliable travel and reproducible results;whereby the actuating cylinder extends the lifting platen and the guide shafts direct the path of the lifting platen because they are permanently attached thereto, and they are being held in a perfect position by at least the two sets of bearings on each guide shaft so that reliable and reproducible travel is repeatedly experienced.