Patent ID: 7240642
Filing Date: 2007-07-10
Classification: F04B

Abstract:
1. An air compressor comprising: a cylinder housing including a chamber formed therein, and defined by a peripheral wall, said cylinder housing including at least two studs provided on an outer peripheral portion thereof, a piston slidably received in said chamber of said cylinder housing, and having a piston rod extended therefrom, a motor coupled to said piston rod, for moving said piston relative to said cylinder housing in a reciprocating action, in order to generate pressurized air, and a cover detachably secured on top of said cylinder housing, and including at least two ears formed therein and selectively aligned with said at least two studs of said cylinder housing, for receiving fasteners which adjustably secure said cover on top of said cylinder housing, and including an outlet tube having a compartment formed therein and communicating with said chamber of said cylinder housing, for receiving the pressurized air from said chamber of said cylinder housing, and said outlet tube including at least one duct extended outwardly therefrom and communicating with said compartment of said outlet tube for receiving the pressurized air from said compartment of said outlet tube, said outlet tube including a valve seat provided therein, said cover including a check valve to control the inner air of said chamber of said cylinder housing to flow into said compartment of said outlet tube when said piston moves toward said cover, and to prevent the inner air from flowing out of said compartment of said outlet tube when said piston moves away from said cover, said check valve being disposed in said outlet tube and engaged with said valve seat, to control the pressurized air to flow from said chamber of said cylinder housing into said compartment of said outlet tube, and to prevent the pressurized air from flowing backwardly from said compartment of said outlet tube into said chamber of said cylinder housing, said cover including a valve device to control the outside air to flow into said chamber of said cylinder housing when said piston moves away from said cover, and to prevent the inner air from flowing out of said chamber of said cylinder housing through said valve device when said piston moves toward said cover, said cover including an inlet formed therein, said valve device being secured to said cover for blocking said inlet of said cover and for controlling the outside air to flow into said chamber of said cylinder housing, said cover including a recess formed therein and communicating with said inlet thereof, for receiving said valve device, said cover including a catch extended therefrom, said valve device including a first end secured to said catch of said cover, said cover including a peripheral slot formed therein, for receiving a sealing ring and for partially receiving said peripheral wall of said cylinder housing, and for making an air tight seal between said cover and said cylinder housing, a supporting base including a plate having an arm extended therefrom to support said cylinder housing, said motor being attached to said plate and including a spindle extended through said plate, and an eccentric member coupled to said spindle of said motor and having a pin extended therefrom and coupled to said piston rod, to move said piston relative to said cylinder housing in reciprocating action, said plate including a gear rotatably attached thereto and rotatably attached to said plate with a shaft, said eccentric member is secured to said shaft and has said pin extended therefrom, said cover including a first duct, and a second duct extended outwardly from said outlet tube and communicating with said compartment of said outlet tube, for receiving the pressurized air from said compartment of said outlet tube, a pressure gauge attached to said first duct, a nozzle coupled to said second duct, and a valve attached to said at least one duct, said cylinder housing including an open top, and said cover being detachably secured on top of said cylinder housing for enclosing and blocking said chamber of said cylinder housing, said cylinder housing including an upper wall provided thereon for enclosing an upper portion of said chamber thereof, said upper wall including a center opening formed therein and defined by a peripheral fence, and said cover being secured on top of said cylinder housing and including a check valve engaged into said compartment of said outlet tube and biased to engage with said peripheral fence, for controlling the inner air to flow from said chamber of said cylinder housing into said compartment of said outlet tube, said upper wall including an inlet formed therein, and a valve device secured to said upper wall, for blocking said inlet of said upper wall, and for controlling the outside air to flow into said chamber of said cylinder housing, and said piston including a bore formed therein, and a valve device secured to said piston, for blocking said bore of said piston, and for controlling the outside air to flow into said chamber of said cylinder housing.