Diesel pile hammer
AssigneeDELMAG GmbH & Co. KG
InventorStefan Mewes
Life of this patent
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Abstract
In a diesel pile hammer, the circumferential surfaces of a piston and striker extend axially to such an extent that, when the piston and striker bear on one another, they are separated only by a very small distance. In their near-edge sections, the piston end face and striker end face are each provided with an annular trough having a semicircular cross section. In this way, when the piston has traveled fully against the striker, a basic working space is obtained, having the form of an annular space with a circular cross-section, in which combustion commences.
Claims11
Diesel pile hammer with a cylinder having a working channel, a piston extending in the cylinder and a striker extending in the lower cylinder section, the cylinder, piston and striker delimiting a working space, with an injection device for the intermittent injection of fuel into the working space, a fuel trough being fashioned in the piston-side end face of the striker, characterized in that the circumferential surface of the piston extends, at least in its striker-side end section, to an axial location which corresponds essentially to the axial position of the striker-side end face of the piston, wherein the striker-side end face of the piston has an eccentric annular trough located radially within the circumferential surface of the piston, and close to the circumferential surfaces of the piston and the striker.
Dependencies are inferred from the claim text.