E - Fixed Constructions – 01 – B
Patent
E - Fixed Constructions
01
B
104/10
E01B 27/17 (2006.01)
Patent
CA 1185120
ABSTRACT OF THE DISCLOSURE In a mobile track leveling and tamping machine, a hydraulic control system operates a drive for reciprocating vibratory tamping toots. The system includes a hydraulic fluid containing receptacle, a three-way proportional electro-hydraulic valve having an outlet connected to one cylinder chamber of the drive and another outlet connected to the hydraulic fluid containing receptacle, a hydraulic pressure regulator steplessly adjustable to a desired maximum tamping pressure exerted by reciprocation of the tools, a differential element having two inputs and an output connected to the valve, and a threshold value stage connected between the transmitter and one of the differential element inputs, the other input being connected to the regulator and a third outlet of the valve being connected to the other cylinder chamber whereby the hydraulic pressure therein is controlled in response to the threshold value.
394886
Bock Gernot
Ganguly Mihir
Theurer Josef
Plasser (franz) Bahnbaumachinen-- Industriegesellschaft M.b.h.
Riches Mckenzie & Herbert Llp
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