Abstract: A pump which has a diaphragm main body integrally connected at a planar portion to a diaphragm portion forming a pump chamber and performs a pumping action by reciprocating a driving portion disposed integrally with the diaphragm portion; the pump being configured compact by disposing a suction valve at the planar portion of the diaphragm main body and further using a planar discharge valve.

Abstract: A pump which has a diaphragm main body integrally connected at a planar portion to a diaphragm portion forming a pump chamber and performs a pumping action by reciprocating a driving portion disposed integrally with the diaphragm portion; the pump being configured compact by disposing a suction valve at the planar portion of the diaphragm main body and further using a planar discharge valve.

Abstract: A pump which has a diaphragm main body integrally connected at a planar portion to a diaphragm portion forming a pump chamber and performs a pumping action by reciprocating a driving portion disposed integrally with the diaphragm portion; the pump being configured compact by disposing a suction valve at the planar portion of the diaphragm main body and further using a planar discharge valve.

Abstract: A diaphragm pump comprising a first diaphragm operated with a driving mechanism such as a crank mechanism, a second diaphragm disposed so as to form an air chamber between the first diaphragm and the second diaphragm, and a pump chamber formed by the second diaphragm and a casing or the like, wherein the a pressure in the air chamber is changed by operating the first diaphragm with the driving mechanism and the second diaphragm is deformed by a change of the pressure in the air chamber to perform a pump function.

Abstract: A miniature motor unit comprising a motor mounting member attached to an output side end of an outer casing of a motor, and configured to combine and fix the outer casing with and to the motor mounting member by forming mounting holes having fixing claws in the output shaft side end of the outer casing, forming bosses on the motor mounting member at locations corresponding to the mounting holes and pressing the bosses into the mounting holes.

Abstract: A rotor winding of air-core disc shape is formed by winding an insulation-coated conductor so as to enclose a yoke of disc shape with only minor gaps at the outside of the yoke. The conductor of this rotor winding extends in the radial direction through the vicinity of the center, and is continuously wound, the turns being successively shifted in the tangential direction. The rotor is composed of the rotor winding, a rotor shaft fixed on this center, and a commutator. A permanent magnet is provided in such a position as opposes the yoke through the plane of the rotor winding of air-core disc shape. This magnet has at least a pair of magnet poles distributed to the opposite position against the rotor shaft, and each magnet pole supplies reverse magnet flux to the opposing yoke. The yoke, the magnet, and a brush contacted the commutator are mounted on the motor case, and the rotor is supported to the motor case so as to be rotated freely.

Abstract: A coil for use in a coreless motor comprises a flat disc shaped portion in which a coil wire extends between two peripheral points which are spaced 180.degree., coil turns of the coil being successively displaced in a peripheral direction, and a cylindrical portion in which the wire is disposed to interconnect portions thereof at the peripheral edge.The coil is manufactured by a winding machine having a winding head including a first disc and a freely rotatable second disc. The second disc has a diameter slightly larger than that of the first disc and acts as a guide. Each turn of the coil is wound across the upper surface of the winding head and about the same for about 180.degree.. Adjacent turns are successively displaced a little in the peripheral direction. After winding, the coil is shaped into a cup shaped configuration.