Electromagnet for solenoid valves and method of manufacturing same

Abstract

An electromagnet (A) capable of being used for a solenoid valve. In this electromagnet (A), a pipe unit (6) is provided at one end part thereof with a mounting portion (12) opposed to a valve body (B), and a cap (E) is joined to the other end part thereof. The pipe unit (6) is provided therein with a movable core (24) so that the core (24) can be moved forward and backward therein, and a coil unit (D) is fitted around the outer circumferential surface of the pipe unit (6). The cap (E) and pipe unit (6) are combined with each other by the threads (18, 39) formed in and on the opposed inner and outer circumferential surfaces thereof. In order to fasten the electromagnet (A) to the valve body (B), the pipe unit (6) is connected to the valve body (B), and the coil unit (D) is then fitted around this pipe unit (6), the cap (E) being then screwed to the pipe unit (6). Thus, the coil unit (D) can be set firmly by the cap (E). The cap (E) is provided with an air vent hole (41) opened in the inner circumferential surface thereof. In order to let out the air from the interior of the pipe unit (6), the cap (E) is turned so that the air vent hole (41) is in the highest position, and, when the air vent hole (41) attains the highest position, the air can be released through the same hole (41).

Dependencies are inferred from the claim text.