on housing bottom 1 which as mentioned above is also screwed onto tubular housing 2 the mounting ears being used to mount the compressor in the area of a belt drive using openings 28 another embodiment of a compressor housing according to the present invention is shown in fig4 housing bottom 1 is again screwed to tubular housing 2 via a threaded connection the housing cover is now represented by a pot shaped cover 30 which is screwed to housing 2 and in doing so is clamped to and braced against tubular housing 2 via a clamping shoulder 31 of cylinder block 3 cylinder block 3 is again sealed off from tubular housing 2 by a gasket device 5 another gasket device 8 seals the cylinder block off from housing cover 30 after cover 30 is screwed on it presses cylinder head 4 and a valve plate 32 against cylinder block 3 furthermore cylinder head 4 contains an oil separator 40 already mentioned above in addition it is possible to see a pressure conduit 9 of a control valve projecting from housing cover 30 which according to the invention may be welded to cover 30 thus eliminating a gasket between the control valve and cover to the outside in this case also the elastic bottom of pot shaped cover 30 is able to absorb thermal stresses within the cylinder head so that these thermal stresses may be appropriately distributed and reduced on the top of the pot shaped bottom and thus do not act directly on the threaded connection between tubular housing 2 and pot shaped cover 30 also the varying thermal expansions between cylinder head 4 preferably made from an aluminum material and a preferable steel material of cover 30 do not directly result in.