Patent ID: 9695809
Date: 2017-07-04
CPC Classifications: F04B,F16K,Y10T

Claim:
1. An air pump capable of twist-locking engagement, comprising: a body housing having a grip portion, the grip portion having one end of the grip portion connected to a barrel of the air pump and having an opposite end of the grip portion provided with a diametrically-reduced, cylindrical coupling portion, a diametrically-reduced cam section being extended outward from an outer end of the coupling portion, the cam section having a curved wall bent at a right angle and two substantially flat end walls, the two end walls being perpendicularly connected to each other at one side and having their opposite side connected to two sides of the curved wall, respectively, so as to form the cam section as a tube having a quarter round section, the cam section having a channel communicated with the coupling portion, the two end walls having different distances from a central axis of the curved wall, wherein a first end wall of the two end walls is farther from the central axis and has a elongated first notch, while a second end wall of the two end walls closer to the central axis and has a elongated second notch, the first notch and the second notch being communicated with each other; a head housing having a tubular coupling portion, the tubular coupling portion of the head housing having one end extended outward to form a head segment, the head segment further extending to form an opening segment, the opening segment and the tubular coupling portion of the head housing being perpendicularly connected, the head housing being coupled via the tubular coupling portion of the head housing to the coupling portion of the body housing so that the head housing and the body housing are rotatable with respect to each other; a round leakproof ring being mounted around the coupling portion of the body housing for forming airtight connection between the head housing and the body housing; an elastic sleeve being provided at the opening segment of the head housing; a pushing member having a shoulder portion, the shoulder portion having one end of the shoulder portion extended outward to form a tubular connecting portion and having an opposite end of the shoulder portion extended outward to form a pin portion, so that air is allowed to flow between the connecting portion and the pin portion, the connecting portion being configured to receive a Presta valve, and the pin portion being configured to press against a Schrader valve, the pushing member being placed at one end of the elastic sleeve so as to be contained in the head housing and located inside the cam section; and an end cap having a round cap body, the cap body being centrally formed with an opening and peripherally provided with a circular cap wall, the end cap having the cap wall screwed to the opening segment of the head housing so that the cap body presses against and positions the elastic sleeve, with the opening communicated with the cylindrical hole of the elastic sleeve.