Road-building machine
AssigneeErhard Thoma
InventorsHeinrich Laeuppi, Bruno Fedrizzi
Life of this patent
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Abstract
Apparatus for inserting longitudinal studs in a concrete road covering. By means of a longitudinally running sled and forks, an exact parallel orientation of the longitudinal studs is achieved, as well as their arrangement at a predetermined height. Through the automatic loading of a holder for the longitudinal studs and the synchronization of the device with the motion of the device for inserting cross-studs, a minimum distance between the longitudinal ends and the cross-joints is maintained.
Claims7
Road-building machine (1) having a support (3) and a device (4) that is longitudinally movable along the support (3) for inserting cross studs (11) that are oriented parallel to the direction of motion of the machine (1) in positions for cross joints in a freshly-laid road covering (6) of concrete, characterized in that the machine (1) has, additionally, a device (5) carried by the machine for inserting longitudinal studs (20) that are oriented perpendicular to the direction of motion, in the position for longitudinal joints in the road covering (6), including means for synchronizing the cycle of device (5) with that of device (4) comprising first starting means for starting a cycle of the device (5) each time the machine (1) has traveled a predetermined distance, the cycles of device (5) continuing until a cross joint is reached, and second starting means for starting a cycle of device (4) when a cross joint is reached which second means interrupts the operation of device (5) and also generates a reference signal for the subsequent cycles of the device (5) so as to ensure placement of the longitudinal studs at predetermined spaced intervals from each other and the cross studs.
Dependencies are inferred from the claim text.