Diesel hammer pile driver

Abstract

A diesel hammer pile driver has a cylinder, a piston displaceably guided in the cylinder and a striker displaceably guided in the cylinder. The striker is disposed underneath the piston in the operating position of the diesel hammer pile driver. A combustion chamber is delimited axially by a face surface of the striker that lies in the interior of the cylinder and by a face surface of the piston, and opens into a fuel feed device. Using the fuel feed device a predetermined amount of fuel can be introduced into the combustion chamber during each working cycle. At least two working connectors are disposed to pass through the circumference wall of the cylinder at the level of the fuel feed device, wherein at least one working connector is provided with a muffler device.

What is claimed is:  
     
         1 . A diesel hammer pile driver comprising:
 (a) a cylinder having an interior and a circumferential wall;   (b) at least first and second working connectors extending through the circumferential wall;   (c) a fuel feed device;   (d) a piston displaceably guided in the cylinder and having a piston face surface;   (e) a striker displaceably guided in the cylinder and disposed underneath the piston in an operating position, said striker having a striker face surface lying in the interior of the cylinder;   (f) a combustion chamber delimited axially by the striker face surface and by the piston face surface and opening into the fuel feed device for introduction of a predetermined amount of fuel into the combustion chamber during each working cycle; and   (g) a muffler device provided on at least the first working connector.   
     
     
         2 . The diesel hammer pile driver according to  claim 1 , wherein the first and second working connectors are disposed on lower and upper imaginary horizontal planes, vertically spaced apart from one another, so that at least the first working connector is disposed vertically offset relative to the second working connector, wherein the first working connector provided with the muffler device is disposed on the lower imaginary horizontal plane. 
     
     
         3 . The diesel hammer pile driver according to  claim 2 , wherein the second working connector is disposed on the upper imaginary horizontal plane and does not have a muffler device. 
     
     
         4 . The diesel hammer pile driver according to  claim 2 , wherein the lower and upper imaginary horizontal planes are spaced apart from one another by between 80 mm and 120 mm. 
     
     
         5 . The diesel hammer pile driver according to  claim 2 , wherein the lower and upper imaginary horizontal planes are spaced apart from one another by between 95 mm and 115 mm. 
     
     
         6 . The diesel hammer pile driver according to  claim 1 , wherein the muffler device is formed by a mantled perforated pipe. 
     
     
         7 . The diesel hammer pile driver according to  claim 1 , wherein the muffler device is attached to the cylinder, by way of vibration elements, so as to be elastically mounted. 
     
     
         8 . The diesel hammer pile driver according to  claim 7 , wherein the vibration elements comprise elastomer components or rubber components. 
     
     
         9 . The diesel hammer pile driver according to  claim 1 , further comprising a strike hood for accommodating a material to be pile-driven disposed below the striker, wherein the striker is disposed, at least in certain regions, so as to surround a sound absorption element. 
     
     
         10 . A diesel hammer pile driver according to  claim 9 , wherein the sound absorption element is formed from at least one perforated sheet-metal cassette filled with an absorber material. 
     
     
         11 . The diesel hammer pile driver according to  claim 10 , wherein the absorber material is formed from mineral insulation wool, melanin resin foam or another porous material.