Abstract: Nonpolarizing beam splitter has at least one substrate, to which a partially reflective coating having a plurality of layers is applied. The layer sequence of the coating includes at least one metal layer, at least two first refractive layers made of a high or medium refractive index dielectric material, and at least two second refractive layers made of a low or medium refractive index dielectric material.

Abstract: The invention relates to a diesel pile hammer (10) which comprises a cylinder (12), a piston (14) slidably mounted inside the cylinder (12), and an impact piece (16) slidably mounted inside the cylinder (12), said impact piece being arranged below the piston (14) in the operating position of the diesel pile hammer (10). A working compartment (32) is axially delimited by a face (36) of the impact piece (16) lying inside the cylinder (12) and a face (46) of the piston (14). A fuel supply device (52, 55, 62, 68) feeds a defined amount of fuel, especially diesel oil, to said working compartment with every working cycle. The fuel supply device (52, 55, 62, 68) is configured to inject the fuel into the working compartment (32) of the cylinder (12) optionally in a first mode of injection as an atomized fuel spray (76) or in a second mode of injection as a fuel jet (74) or in a third mode of injection both as an atomized fuel spray (76) and as a fuel jet (74).

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.

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.

Abstract: In a diesel pile hammer, an end-piece that closes off the bottom end of the cylinder, in which a shaft section of an anvil is displaceably mounted, is provided with a lubricant collecting duct that leads to a lubricant collecting chamber separately fitted on the outside of the cylinder. In this way excess lubricant is taken away from the bottom end of the cylinder under control.

Abstract: In this diesel pile hammer, the cylinder carries a means for cleaning the combustion gases. This means is connected to a working passage in the cylinder via a valve and an exhaust gas/fresh air changeover device.

Abstract: A striker for a diesel pile driver has a piston section, a shaft section and a striking section. The striking section has one or more steps on an outside surface and/or on an inside surface. These steps serve to produce a load-transmitting form closure with pile-driving material of different diameters.

Abstract: For selective operation in a Diesel mode and a pressure air mode a Diesel type pile hammer is additionally equipped with a pressure air accumulator, which is connected to the working space of the cylinder by a servo valve.