Railroad track ballast tamper
AssigneeSociete des Anciens Establissements Lucien Geismer
InventorSandri Sartori
Life of this patent
Estimating the term…
Abstract
The ballast tamper comprises two tool holders articulated to a chassis and equipped with tools set in vibration and fitting one on each side of a single or double cross tie of the track. The tops of the tool holders are connected by a hydraulic gripper ram. The supply of hydraulic fluid to the ram, for at least one of its directions of travel, is provided by an external hydraulic assembly which comprises means for metering an amount of fluid let into the ram or discharged therefrom so as to cause the rod of this ram to selectively describe a limited gripper opening stroke, in the case of a single cross tie, or a full stroke, in the case of a double cross tie. A particularly quiet “hydraulic stop” effect is thus achieved.
Claims5
A railroad ballast tamper comprising two tool holders, articulated to a chassis about parallel horizontal axles, which are equipped in their lower parts with tools capable of fitting one on each side of a single or double cross tie of the track concerned, and the upper ends of which are connected by a hydraulic gripper ram, means being provided for vibrating the tools, characterized in that the supply of hydraulic fluid or the draining of hydraulic fluid from the hydraulic gripper ram, for at least one of its two directions of travel, is provided by a hydraulic assembly external to this ram and comprising means for metering an amount of hydraulic fluid capable of being let into said ram or discharged therefrom so as to cause the rod of this ram selectively to describe a gripper opening stroke limited to a value below that of its full stroke, the hydraulic assembly also comprising hydraulic control means associated with said metering means.
Dependencies are inferred from the claim text.