Compressor for tire inflating combination

Abstract

An air compressor device includes a piston slidably engaged in a cylinder housing and having an outer peripheral groove formed by a base peripheral surface and two side surfaces, to form an outer opening and an inner recess, a motor is coupled to the piston to move the piston in the cylinder housing in reciprocating action, and a sealing ring is engaged in the outer peripheral groove of the piston, for making an air tight seal between the cylinder housing and the piston. The sealing ring includes a peripheral channel to form a base segment, an inner leg and an outer leg, the outer leg is extended out of the outer opening of the piston, for slidably engaging with a tilted or inclined inner peripheral surface of the cylinder housing, even when the piston is tilted relative to the cylinder housing.

Description

[0001]The present invention is a continuation-in-part of U.S. patent application Ser. No. 11 / 022,349, filed 22 Dec. 2004, pending and to be abandoned.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a tire inflating combination, and more particularly to a tire inflating combination including an air compressor assembly having an improved sealing ring for facilitating a sliding engagement between a piston and a cylinder housing which includes an inclined inner peripheral surface.[0004]2. Description of the Prior Art[0005]Various kinds of typical air compressors have been developed and comprise a piston slidably engaged within a cylinder housing and movable relative to the cylinder housing in a reciprocating action, to pump air and / or to generate pressurized air, for inflating tires, or the like.[0006]For example, U.S. Pat. No. 6,205,918 to Kumai et al., and U.S. Pat. No. 6,213,725 to Chou disclose two typical air compressors each compris...

AI Technical Summary

Benefits of technology

[0010]The primary objective of the present invention is to provide a tire inflating combination including an air compressor assembly having an improved sealing ring for facilitating a sliding engagement between a piston and a cylinder housing which includes an inclined inner peripheral surface, and for suitably making an air tight seal between the cylinder housing and the piston.

[0012]The third outlet port of the outlet tube includes an inclined valve seat provided therein, and an inner thread formed therein for threading with a cap, the cap includes a bore formed therein and communicating with the outlet tube and the cylinder housing, for relieving over-pressurized air.

Problems solved by technology

However, the sealing ring may be disengaged from the cylinder housing when the piston is moved to bottom or outer end of the cylinder housing, due to tilting or inclined status of the piston rod relative to the cylinder housing, such that the sealing ring may not be used to suitably make an air tight seal between the cylinder housing and the piston.

In addition, the inner peripheral surface of the cylinder housing is straight and may not be suitably made an air tight seal between the inner peripheral surface of the cylinder housing and the sealing ring of the piston.

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