Abstract: A pressure sensor has a stem in which a pressure introduction hole into which a pressure medium is introduced and a diaphragm deformable according to the pressure of the pressure medium are formed, and a strain detecting element which is arranged on the diaphragm via an insulating film and being configured to output a detection signal according to the deformation of the diaphragm. The strain detecting element is configured to have a portion made of polysilicon. A low doping layer having a higher electrical resistivity than polysilicon and a higher crystallinity than the insulating film is arranged between the insulating film and the strain detecting element.

Abstract: A double sump oil pan includes a separator made of plastic that partitions the interior of the oil pan into an inner sump and an outer sump, a plate, and an elastically deformable sealing member attached to the plate. The sealing member closely contacts the inner wall of the oil pan and seals the outer sump. The plate and the separator are fixed to each other.

Abstract: A double sump oil pan includes a separator made of plastic that partitions the interior of the oil pan into an inner sump and an outer sump, a plate, and an elastically deformable sealing member attached to the plate. The sealing member closely contacts the inner wall of the oil pan and seals the outer sump. The plate and the separator are fixed to each other.

Abstract: A roll forming apparatus for forming projections on a band plate at predetermined internals with respect to a longitudinal direction of the band plate has a carrying roll between an upstream forming roll unit and a downstream forming roll unit. Projections having a first shape are formed on the band plate by an upstream projection forming roll and an upstream recession forming roll of the upstream forming roll unit. The projections having the first shape are formed into projections having a second shape that is steeper than the first shape by a downstream projection forming roll and a downstream recession forming roll of the downstream forming roll unit. Also, the band plate is carried in a sprocket manner that the projections formed in the upstream forming roll unit sequentially engage with projections of the upstream projection forming roll, recessions of the carrying roll, and projections of the downstream projection forming roll.

Abstract: A screw or a tapping screw, comprising an ultra fine structure steel having ferrite grains of 3 ?m or smaller in average grain size and a nitrided layer on a surface part, wherein a strength is increased, a surface hardness is increased, and the surface hardness and an inside hardness are kept in balance, whereby a novel tapping screw and novel general screws can be provided.