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Pressurizing water pump with control valve deviceRelated Patent Categories: Pumps, Condition Responsive Control Of Pump Drive Motor, Responsive To Accumulation Of Pumped Liquid In Receiver, By Liquid Pressure SensorPressurizing water pump with control valve device description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070122288, Pressurizing water pump with control valve device. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a pressurizing water pump. More particularly, the present invention relates to a pressurizing water pump with a control valve device for pumping water to a faucet in a building or into a storage tank mounted on top of the building. [0003] 2. Description of the Related Art [0004] It is well known to use a pressurizing water pump for pumping water to a faucet in a building or into a storage tank mounted on top of the building. A typical pressurizing water pump (or simply "pump") includes an accumulator and a pressure switch to control operation of the pump. When a faucet in the building is turned on, the water pressure in the piping drops and water is supplied from the accumulator to the faucet, which causes a pressure drop of the accumulator. When the water pressure in the accumulator is below a predetermined value, the pressure switch is activated to start the pump. Water is supplied to the faucet and the accumulator at the same time. The pressure switch is activated to turn off the pump when the water pressure in the accumulator reaches another predetermined value. In practice, the pump is repetitiously turned on and off due to the various periods of times and various amounts of water output via the faucet, resulting in unstable output of water, which causes problems to a user taking a hot water bath. The temperature and pressure of the output water are unstable. Gas leakage is liable to occur. The elements of the pump are apt to be damaged and the life of the pump is shortened. Further, the momentary voltage is unstable and the electricity consumption is increased. SUMMARY OF THE INVENTION [0005] A water pressurizing pump in accordance with the present invention comprises an accumulator, a control valve device, a valve device, a pressure switch, and a motor. [0006] The control valve device comprises a valve body including a first side and a second side. The second side of the valve body comprises a compartment. A cap is mounted in the compartment and includes a hole through which water is output to a piping system to which the water pressurizing pump is connected. At least one channel is defined in an end of a circumferential wall delimiting the compartment of the valve body and in communication with the hole of the cap. The valve body further comprises a three-way channel including a first port in communication with the accumulator, a second port, and a third port in communication with the compartment. [0007] The valve device is movably mounted in the compartment of the valve body. The valve device comprises a hollow body having an end wall and an open end. The valve device further comprises a movable block mounted in the body, an elastic element mounted in the body, and an end cap for closing the open end of the body. The movable block comprises a plurality of annularly spaced legs, defining a plurality of passageways between the legs. The end wall of the body faces the end cap and includes a through-hole in communication with the channels of the valve body. The body further includes at least one outer water passageway in a circumference thereof. The end cap includes at least one hole. The elastic element is mounted between the end cap and the movable block. [0008] The pressure switch is coupled to the first side of the valve body and in communication with the second port of the three-way channel of the valve body. The motor includes an outlet. The outlet of the motor, the hole of the cap, and the piping system are in communication with one another. [0009] When the piping system is open and a water pressure in the accumulator is above a first value, water flows from the accumulator into the piping system via the three-way channel and pushes the valve device toward the cap. The water enters the piping system via the at least one outer water passageway of the body of the valve device, the at least one channel of the valve body and the outlet of the cap. [0010] When the piping system is open and the water pressure in the accumulator is below the first value, the motor is turned on to pump water to the piping system and the outlet of the cap. The water flowing to the outlet of the cap enters the at least one channel of the valve body and pushes the valve device away from the cap, with the movable block blocking the hole of the body of the valve device, not allowing water to enter the accumulator, thereby maintaining the water pressure in the accumulator in a stable low-pressure state. [0011] When the piping system is closed and the water pressure in the accumulator is below the first value, the motor is turned on to pump water to the outlet of the cap. The water flowing to the outlet of the cap enters the at least one channel of the valve body, pushes the valve device away from the cap and compresses the elastic element, moving the movable block away from the end wall of the body of the valve device, allowing water from the inlet of the cap to flow into the accumulator via the at least one channel of the valve body, the through-hole of the end wall of the body, the passageways between the legs of the movable block, the at least one hole of the end cap, and the three-way channel until the water pressure in the accumulator is greater than a second value. [0012] Preferably, the valve device further comprises a muffling element mounted between the movable block and the end wall of the body of the valve device. [0013] Preferably, the end wall of the body of the valve device further comprises at least one protrusion abutting against the cap to provide a water-flowable gap between the body of the valve device and the cap. [0014] Preferably, the valve device further comprises a seal member between the end cap and an end wall delimiting the compartment of the valve body. The seal member includes a hole through which water is flowable. [0015] Preferably, the accumulator comprises a first housing and a second housing that together define a groove therebetween. A membrane is mounted in the accumulator and separates the accumulator into an air chamber and a water chamber. The membrane comprises a base including a circumferential wall that is fittingly received in the groove. The membrane, the first housing, and the second housing are fixed together by supersonic welding or screws to increase pressure-resisting capacity of the membrane and the accumulator. [0016] The cap may be made of plastic and fixed in the compartment of the valve body of the control valve device by supersonic welding. [0017] Other objectives, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS [0018] FIG. 1 is a side elevational view of a pressurizing water pump in accordance with the present invention. [0019] FIG. 2 is an exploded perspective view of a control valve device of the pressurizing water pump in accordance with the present invention. [0020] FIG. 3 is a side view, partially sectioned, of an accumulator and the control valve device of the pressurizing water pump in accordance with the present invention. [0021] FIG. 4 is a sectional view illustrating pressure release operation of the control valve device. Continue reading about Pressurizing water pump with control valve device... Full patent description for Pressurizing water pump with control valve device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Pressurizing water pump with control valve device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Pressurizing water pump with control valve device or other areas of interest. ### Previous Patent Application: Fan blade assembly Next Patent Application: Electronic control device for a synchronous pump Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Pressurizing water pump with control valve device patent info. 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