Patent ID: 6345958
Filing Date: 2002-02-12
Classification: F01P,F04B

Abstract:
A pressure adjusting device for engine cooling system comprises:a pumping device, a connector device, and a connection pipe connected to the pumping device and the connector device, the pumping device having a hollow cylinder, a plunger device inserted through the hollow cylinder, a cover, a check valve, a non-return valve, an inhale joint, an inhale pressure meter, an exhale joint, and an exhale pressure meter, the hollow cylinder having an inner interior, a through hole, a vent aperture, and a distal thread, the plunger device having a drive rod, a disk disposed on a first end of the drive rod, a piston disposed on a second end of the drive rod, and an O-ring surrounding the piston, the piston inserted in the inner interior of the hollow cylinder, the drive rod inserted through the through hole, the cover having an inner thread engaging with the distal thread of the hollow cylinder, a round aperture receiving the check valve and a circular aperture receiving the non-return valve, a lower end of the inhale joint inserted in the round aperture, a bolt fastening the cover and the inhale joint together, the inhale joint having an inhale head, a lower end of the exhale joint inserted in the circular aperture, the exhale joint having an exhale head, the inhale joint connected to the inhale pressure meter, the exhale joint connected to the exhale pressure meter, the connector device having a stepped post having a through aperture, a threaded rod inserted through the through aperture, a collar enclosing a lower end of the stepped post, a handle bar disposed on the stepped post, and a hollow button disposed on the handle bar, the threaded rod having a head portion, a bottom flange, a threaded portion, and a vent hole, a washer enclosing the bottom flange, the handle bar having a flat plate and two bevel plates connected to the flat plate, the flat plate having a center hole, an annular insertion block inserted in the hollow button, the annular insertion block having a threaded interior receiving the threaded portion of the threaded rod, the threaded rod passing through the center hole of the flat plate and the hollow button, the head portion of the threaded rod inserted in an end of the connection pipe, the check valve having a first funnel-shaped hole and a first bulletheaded ball inserted in the first funnel-shaped hole, and the non-return valve having a second funnel-shaped hole and a second bulletheaded ball inserted in the second funnel-shaped hole.