Tool driving or impacting – Drive by means reacting to rotating eccentric mass
Patent
1990-03-23
1992-02-18
Rosenbaum, Mark
Tool driving or impacting
Drive by means reacting to rotating eccentric mass
74 61, E02D 718
Patent
active
050885650
ABSTRACT:
A vibratory pile driver having means for clamping onto a pile or similar structure to be driven or extracted substantially linearly, e.g. vertically, includes a hydraulic gear motor having two oppositely rotatable shafts and a pair of semicircular weights aligned in the same vertical plane. Each weight is rotatably secured to a shaft parallel to the motor shafts. Means, in the form of drive and driven pulleys, sprockets or the like connected by toothed timing belts, chains or the like, respectively, are provided for driving the weights from the motor shafts. Since the gears of the hydraulic gear motor operate in synchronization, the weights are driven synchronously to provide substantially linear, e.g. vertical, forces. Such an arrangement combines the synchronizing gears and the power source and makes it possible to eliminate relatively large gears, to use larger diameter weights and to achieve, under certain designs, a smaller overall machine width adjacent the pile to be driven.
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Brochure entitled "Hydraulic Vibratory Driver/Extractors" of International Construction Equipment, Inc., Ref. V7-0689-51.
One-page Sheet entitled "Motors, hydraulic", Ref. A/122.
J & M Hydraulic Systems, Inc.
Rosenbaum Mark
Smith Scott A.
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