Patent ID: 6302622
Filing Date: 2001-10-16
Classification: E01C

Abstract:
A tamping rammer provided with a tamping foot, comprising:a machine body including an inner cylinder and an outer cylinder slidably inserted into each other below a power transmission mechanism to change rotational movements of a prime mover to vertical movements;a tamping plate at the lower end of the tamping foot; anda coil spring of the inner cylinder receiving the vertical movements of the power transmission mechanism via a piston rod and the coil spring transmitting by its resilience the vertical movements of the inner cylinder to the tamping plate,wherein the tamping plate comprises:a flat machine body supporting area for supporting the machine body, said flat machine body supporting area comprising a range R having a radius r corresponding to the distance from a perpendicular line B drawn from the center of gravity G of the machine body to the ground and a centerline A of the machine body drawn inclinedly along the longitudinal direction of the tamping foot, andinclined surfaces around said flat area rising toward the outer edge of said tamping plate.