Air pump capable of twist-locking engagement

a technology of air pump and twist lock, which is applied in the direction of positive displacement liquid engine, machine/engine, functional valve type, etc., can solve the problems of time-consuming assembling work, labor costs, and complicated structure of the device, and achieve the effect of improving operational feeling and simplifying structur

Active Publication Date: 2017-06-29
BETO ENG & MARKETING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to overcome the shortcomings of the prior art by providing an air pump that can securely lock onto a twisting part. The invention has a simplified design and improved operation.

Problems solved by technology

The fact that leakproof rings (24) have to be provided at both sides of the cam (22) makes the device structurally complicated and leads to time-consuming assembling work.
In view of the increase of labor costs, this forms a defect needs to be remedied.
In addition, it is hard for an operator through his / her hand feeling to determine whether the cam (22) is correctly located with the cam (22) pressing against the pressing member (27) directly.

Method used

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  • Air pump capable of twist-locking engagement
  • Air pump capable of twist-locking engagement
  • Air pump capable of twist-locking engagement

Examples

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Embodiment Construction

[0019]For further illustrating the means and functions by which the present invention achieves the certain objectives, the following description, in conjunction with the accompanying drawings and preferred embodiments, is set forth as below to illustrate the implement, structure, features and effects of the subject matter of the present invention.

[0020]Referring to the drawings, an air pump according to the present invention is shown to comprise the component parts described hereinafter.

[0021]A body housing (10) has a grip portion (11). The grip portion (11) has its one end connected to a barrel (12) of the air pump and has its opposite end provided with a diametrically-reduced, cylindrical coupling portion (13). A diametrically-reduced cam section (14) is extended outward from an outer end of the coupling portion (13). The cam section (14) has a curved wall (141) bent at a right angle and two substantially flat end walls (142)(143). The two end walls (142)(143) are perpendicularly ...

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Abstract

An air pump capable of twist-locking engagement includes a body housing, a head housing, a leakproof ring, an elastic sleeve, a pushing member and an end cap. The body housing has a cam section formed as a tube having a quarter-round section. The head housing has an opening segment. The head housing and the body housing are rotatably coupled with the leakproof ring arranged therebetween. The elastic sleeve is located at the opening segment of the head housing. The pushing member is located at one end of the elastic sleeve and received in the cam section. The end cap is screwed to the opening segment for pressing against and positioning the elastic sleeve. By a twisting operation of the air pump, the cam section can be turned to engage or release an air valve of an article to be inflated.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field[0002]The present invention relates to air pump, and more particularly to an air pump that is capable of engaging an air valve of an article to be inflated in a twist-locking manner.[0003]2. Description of Related Art[0004]The air pump disclosed in U.S. Pat. No. 5,379,796, also issued as Taiwan Patent No. 93676, is one of the inventions made by the inventor of the present invention, and is designed for engaging a tire air valve in a twist-locking manner. The prior-art device uses a cam (22) to press and deform an elastic body (25) that in turn engages firm with the tire air valve. The rotating member (22), i.e. the cam is located by a screw-like locating member (23) screwed thereonto from the exterior of a head housing (21). The fact that leakproof rings (24) have to be provided at both sides of the cam (22) makes the device structurally complicated and leads to time-consuming assembling work. In view of the increase of labor costs,...

Claims

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Application Information

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IPC IPC(8): F04B33/00F16K15/20
CPCF04B33/005Y10T137/3724F16K15/20
InventorWANG, LOPIN
OwnerBETO ENG & MARKETING