Track tamper and vibratory drive mechanism

Details Track tamper and vibratory drive mechanism Track tamper and vibratory drive mechanism

E - Fixed Constructions

01

B

104/10

E01B 27/16 (2006.01) B06B 1/18 (2006.01) F15B 21/12 (2006.01)

Patent

CA 1051268

ABSTRACT OF THE DISCLOSURE Opposed pivotally mounted tamper arms are oscillated by respective single-acting hydraulic piston assemblies controlled by separate hydraulic duplex rotary distributing valves. Fluid supply and return lines for each piston assembly are connected to a source of pressurized hydraulic fluid via the respective rotary valve. Each valve has a stationary ported shell which receives a rotary cylindrical spool having a pair of axially displaced supply and return throughports which alternately register with supply and return line ports in the shell to open and close the connec- tions between the respective piston assembly and the supply and return lines. While the rotary valves are preferably driven by a common drive unit, the relative phase of the oscillations of the arms can be determined by rotationally offsetting one of the spools with respect to the other by the desired phase angle.

265280

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