Patent ID: 7011256

Claim:
In a device for supplying fuel at high pressure to an internal combustion engine, having a pistonlike element ( 5 ) which is disposed longitudinally displaceably in a bore ( 3 ) of a component ( 1 ), and which pistonlike element ( 5 ) is guided with a sealing portion ( 105 ) in a guide portion ( 103 ) of the bore ( 3 ), wherein the guide portion ( 103 ) discharges at one end into a pressure chamber ( 19 ) that can be filled with fuel at high pressure and at the other end into a leak fuel chamber ( 15 ), in which leak fuel chamber ( 15 ) a low fuel pressure always prevails, the improvement comprising at least one recess ( 30 ) on the sealing portion ( 105 ) of the pistonlike element ( 5 ), which recess communicates hydraulically with the pressure chamber ( 19 ) and extends therefrom in a direction toward the leak chamber, and which, except for the annular gap ( 17 ) formed between the pistonlike element ( 5 ) and the inner wall of the guide portion ( 103 ), is sealed off from the leak fuel chamber ( 15 ).