Abstract: In an expansion valve, in a first passage through which a high pressure liquid refrigerant flows, an inlet port includes a large diameter passage portion formed from one side surface to the other side surface of a valve body, and a small diameter passage portion that provides communication between the large diameter passage portion on the bottom end thereof and a valve chamber. A coil spring provided in the valve chamber biases a valve member toward a valve hole. An O ring that seals between a plug that supports a lower end of the coil spring and the valve body is located below the small diameter passage portion and placed on the opposite side of the bottom end of the large diameter passage. Thus, the plug that closes an opening of the valve chamber can be mounted to an upper position, thereby reducing a vertical size of the valve body to further reduce a size of the valve body, and reducing an amount of use of metal materials for the valve body to reduce weight and cost.

Abstract: To reduce a weight of a valve main body of an expansion valve formed by an extrusion molding of a metal material such as an aluminum alloy or the like. A valve main body 100 is made of a material obtained by an extrusion molding of a metal material such as an aluminum alloy or the like. Two pair of holding faces 101a and 101b, and 102a and 102b are formed on both side face 100a and 100b in the extruding direction of the valve main body 100, and the other portions are to be concave as much as possible, so that the weight can be reduced. The holding faces 101a and 101b and the holding faces 102a and 102b are parallel faces, and come to be holding faces for chuck claws C1 and C2 at a time of machining.

Abstract: Provided is a diaphragm-actuated fluid control valve capable of, even in a region where the pressure difference between the pressures on the upper surface side and the lower surface side of a diaphragm is small, significantly changing the amount of lift of the diaphragm relative to the change in the pressure difference, without reducing the thickness of the diaphragm, and thus is capable of providing a predetermined flow rate and performing stable flow rate control. The control valve has a diaphragm 35 for driving a valve 25. The diaphragm 35 has a mountainous-wave portion 35b formed between an outermost portion 35a and an innermost portion 35c thereof, the mountainous-wave portion having the shape of concentric circles when viewed in a plan view and having N+(0.25 to 0.75) elevated portions that protrude upward or downward when viewed in cross section, where N is a positive integer (1, 2, 3, . . . ).

Abstract: An expansion valve for reducing the quantity of material required for the valve body by contriving the arrangement of bolt fitting grooves. In the expansion valve (20), displacement of a valve member driver (36) provided in the valve body (21) is transmitted to a valve member by a valve member drive rod (36f) and the valve opening is altered to control the flow rate of the refrigerant. The valve body (21) consists of a body upper portion (40) and a body lower portion (41) narrower than the body upper portion (40), and bolt fitting grooves (43, 43) opening in the flank of the valve body (21), preferably opening obliquely downward, are formed at the boundary (42) of the body upper portion (40) and the body lower portion (41). With such a layout, the material required at the boundary (42) can be reduced furthermore and the quantity of material required for the valve body (21) can be reduced furthermore, as a result.

Abstract: An optical logic device performs a logic operation on a plurality of input light signals. The optical logic device has a photoelectric conversion portion, in which photoreceivers for receiving input light signals are provided in parallel, that outputs an electric signal obtained by adding up outputs of the photoreceivers, and a comparator that compares a voltage level of the electric signal outputted from the photoelectric conversion portion with a predetermined voltage level.

Abstract: In an expansion valve, in a first passage through which a high pressure liquid refrigerant flows, an inlet port includes a large diameter passage portion formed from one side surface to the other side surface of a valve body, and a small diameter passage portion that provides communication between the large diameter passage portion on the bottom end thereof and a valve chamber. A coil spring provided in the valve chamber biases a valve member toward a valve hole. An O ring that seals between a plug that supports a lower end of the coil spring and the valve body is located below the small diameter passage portion and placed on the opposite side of the bottom end of the large diameter passage. Thus, the plug that closes an opening of the valve chamber can be mounted to an upper position, thereby reducing a vertical size of the valve body to further reduce a size of the valve body, and reducing an amount of use of metal materials for the valve body to reduce weight and cost.

Abstract: An expansion valve for a refrigerant cycle has an orifice passage portion, a valve body, a spring member and a deformation portion. The orifice passage portion is configured for decompressing and expanding a high pressure refrigerant into a low pressure refrigerant. The valve body is disposed to open and close the orifice passage portion so that a flow rate of the low pressure refrigerant flowing into a low pressure passage portion is controlled in accordance with a valve opening degree. The spring member is disposed between the valve body and the deformation portion for applying a biasing force to the valve body. The deformation portion is plastically deformable in a direction parallel to an expansion and contraction direction of the spring member by applying an external force.

Abstract: A light receiving module for receiving a plurality of light rays that includes a first optical element having a plurality of light emitting sections, a second optical element having a plurality of light receiving sections, and a gradient index lens which condenses a plurality of light rays being output from the plurality of light emitting sections to the plurality of light receiving sections respectively, the gradient index lens being disposed between the first optical element and the second optical element.

Abstract: An optical logic device performs a logic operation on a plurality of input light signals. The optical logic device has a photoelectric conversion portion, in which photoreceivers for receiving input light signals are provided in parallel, that outputs an electric signal obtained by adding up outputs of the photoreceivers, and a comparator that compares a voltage level of the electric signal outputted from the photoelectric conversion portion with a predetermined voltage level.