Patent ID: 6527529
Filing Date: 2003-03-04
Classification: F04C

Abstract:
In a geared feed pump, having a housing in which, between a housing part (10) and a cap part (12; 112; 212), a pump chamber (14) is formed in which a rotationally driven pair of gear wheels (16, 18), meshing with one another on their outer circumference, is disposed, which pump a feed medium from an intake chamber (40), communicating with a feed medium supply tank, along feed conduits (44), formed between the outer circumference of the gear wheels (16,18) and circumferential walls of the pump chamber (14), into a pressure chamber (42), the cap part (12; 112; 212) being disposed opposite the face ends of the gear wheels (16, 18), the improvement wherein the cap part (12; 112; 212), on its inside oriented toward the face ends of the gear wheels (16, 18), has an indentation (50; 150; 250) with a cross section that is at least as large as the cross section of the face ends of the gear wheels (16, 18), and that between the cap part (12; 112; 212) and the face ends of the gear wheels (16, 18), a platelike cover element (52; 152; 252) that covers at least the indentation (50; 150; 250) is disposed, which, at least when the geared feed pump is not in operation, rests with initial tension against the face ends of the gear wheels (16,18), the cover element (52; 152; 252) has at least one opening (54), through which the indentation (50; 150; 250) communicates with the intake chamber (40).