Lubricating oil filter with an upright filter pot

Claim 1

A lubricating-oil filter comprising: a. a filter base having a bore therein; b. a filter pot arranged generally upright at the filter base, said filter pot having a large inner space; c. a bolt retained at its lower end in the bore in the filter base and arranged centrally in the inner space of the filter pot; d. a first upper clean oil filter chamber centered around the bolt in the inner space of the filter pot; e. a second lower clean oil filter chamber centered around the bolt in the inner space of the filter pot; f. a first base channel means in the filter base for receiving oil emptied by way of the bore from the inner space of the filter pot from the first clean oil filter chamber, and from the second clean oil filter chamber; g. an intermediate channel means in the bolt for connecting the first clean oil filter chamber with the first base channel means; h. a first oil discharge channel means in the filter base for connecting the second clean oil filter chamber by way of the bore in the filter base with the first base channel means; i. a second base channel means for receiving oil emptied from the second clean oil filter chamber by way of the first oil discharge channel; j. a second oil discharge channel means in the filter base for connecting the inner space of the filter pot by way of the bore in the filter base with the first base channel means; whereby, upon removal of the lower end of the bolt from the bore in the filter base, oil is emptied from the inner space of the filter pot through the first and second oil discharge channels by way of the bore in the filter base into the first base channel means.