Air compressor

Patent metadata

Field	Value
Publication number	US-9964104-B2
Application number	US-201514874371-A
Country	US
Kind code	B2
Filing date	Oct 2, 2015
Priority date	Oct 8, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

An improved air compressor includes a cylinder with a piston body and an air storage container. The air storage container can be detachably mounted to the cylinder to define a primary air chamber, and an auxiliary air chamber which can reduce the motion resistance of the piston body, so that the piston body can conduct reciprocating motion in the cylinder more smoothly. Furthermore, the cylinder has an open bottom that is divided into two halves according to a central vertical line (Y) of the cylinder, wherein one half of the open bottom is horizontal while the other half of the open bottom is slanted. When the piston body reaches the bottom dead center, the head of the piston body will be entirely within the cylinder and thus keep air-tight with the cylinder. Therefore, the performance of compressing air and the operational safety can be increased.

First claim

I claim:

1. In an air compressor including a main frame, a motor, and a cylinder fitted with a piston body, the motor and the cylinder being provided at the main frame, the motor capable of driving the piston to conduct reciprocating motion in the cylinder to produce compressed air, which is transferred to an air storage container; wherein the improvement comprises:
the air storage container, being made separately from the cylinder, has a closed top, a surrounding wall extending from the closed top to define an inner space that terminates at an open bottom, the inner space serves as a primary air chamber for storing the compressed air produced in the cylinder; a tubular connection portion is formed on a top wall of the cylinder, the tubular connection portion defines therein an exit hole communicating with an inner space of the cylinder, the space of the exit hole serves as an auxiliary air chamber for storing additional compressed air,
wherein the cylinder is provided at its surrounding wall, near its top wall, with a coupling flange having two opposite sides, each of which is provided with an L-shaped holder defining a recess; the air storage container being provided with a plurality of outlets and provided at its surround wall, near its open bottom, with a coupling flange having two opposite sides, each of which is provided with an L-shaped hook defining a recess; whereby the air storage container is capable of being fitted over the cylinder and rotated about the cylinder to have the opposite sides of the coupling flange of the air storage container slide in the recesses of the L-shaped holder of the cylinder and have the opposite sides of the coupling flange of the cylinder slide in the recesses of the L-shaped hook of the air storage cylinder, so that the air storage container is detachably mounted to the cylinder, the tubular connection portion defines at its outer surface an annular groove to be fitted with a seal ring; a plurality of tabs is formed on the top of the tubular connection portion, the tabs being arranged in a ring at regular gaps, each tab being provided with spaced ribs on its inner surface; a plug having three coaxially aligned portions including a top round portion, a middle round portion, and a bottom round portion is fitted into a central space surrounded by the tabs and limited by the spaced ribs of the tabs, so that the plug may not move sideways, a diameter of the bottom round portion of the plug being more than a diameter of the exit hole but less than a diameter of the central space surrounded by the tabs, the compressed air produced in the inner space of the cylinder being able to flow into the inner space of the air storage container via the gaps between the tabs; one or more compression springs are provided in the air storage container to force the plug to seal the exit hole of the tubular connection portion when the air pressure in the cylinder is less than a predetermined pressure, one end of each compression spring being fitted around the top round portion while urged against the middle round portion, or fitted around the middle portion while urged against the bottom round portion; a length of the exit hole is greater than a permissible displacement of the plug being away from the tubular connection portion, so that the auxiliary air chamber can serve as an effective chamber for storing additional compressed air,
wherein an open bottom of the cylinder is divided into two halves according to a central vertical line (Y) of the cylinder, one half of the open bottom being horizontal while the other half of the open bottom being slanted and parallel to a top surface of the head of the piston body when the piston body is at bottom dead center; whereby when the piston body reaches bottom dead center, the head of the piston body will be entirely within the open bottom of the cylinder, and thus the piston body will not escape from the cylinder, so that an operational security is increased and air-tightness between the head of the piston body and the inner surface of the surrounding wall of the cylinder is maintained, thereby increasing a performance of compressing air.

2. The air compressor of claim 1 , wherein the air storage container is provided at its closed top with a central column extending downwardly from the inner surface of the closed top, an inner surface of the closed top of the air storage container being provided with a plurality of annular protrusions around the central column and defining a plurality of annular grooves between the annular protrusions and the central column for receiving the other ends of the compression springs.

Assignees

• Chou Wen San

Inventors

• Chou Wen-San

Classifications

• F04B41/02

  having reservoirs · CPC title

• F04B39/121 Primary

  Casings · CPC title

• F04B39/0061

  using muffler volumes · CPC title

• F04B39/0027

  Pulsation and noise damping means · CPC title

• F04B35/04

  the means being electric · CPC title