FILTER DEVICE HAVING A PUMP
First Claim
1. A filter device, in particular provided for use with diesel fuels, comprising a filter element that can be exchangeably accommodated in a filter housing (19), characterized in that a fluidpump device (46) with two pump chambers (45, 49) is present, which by means of a pump piston guided longitudinally movably in these chambers (51) at least in one of its two directions of travel are separated from one another in a fluid tight manner and wherein for each pump chamber (45, 49) assigned a valve (39, 63) provision is made that working in opposite direction to the respective other valve (39, 63) upon actuation of the pump device (46) opens or closes.
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Accused Products
Abstract
The invention relates to a filter device, in particular provided for use with diesel fuels, comprising a filter element (19) that can be exchangeably accommodated in a filter housing, which filter device is characterized in that a fluid pump device (46) having two pump chambers (45, 49) is present as part of the filter device, which pump chambers, by means of a pump piston (51) guided in said chambers in a longitudinally movable manner, are separated from each other in a fluid-tight manner at least in one of the two directions of movement of the pump piston, and that each pump chamber (45, 49) is assigned a valve (39, 63), which opens or closes oppositely to the other valve (39, 63) when the pump device (46) is actuated.
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Citations
10 Claims
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1. A filter device, in particular provided for use with diesel fuels, comprising a filter element that can be exchangeably accommodated in a filter housing (19), characterized in that a fluid
pump device (46) with two pump chambers (45, 49) is present, which by means of a pump piston guided longitudinally movably in these chambers (51) at least in one of its two directions of travel are separated from one another in a fluid tight manner and wherein for each pump chamber (45, 49) assigned a valve (39, 63) provision is made that working in opposite direction to the respective other valve (39, 63) upon actuation of the pump device (46) opens or closes.
Specification