Patent Application
20070186978
1. Field of Invention
The present invention relates in general to a tire pump, and more particular, to a portable tire pump.
2. Related Art
For driving safety, it is important to keep the tire pressure of a vehicle in normal. Lower pressure in a tire can cause fuel-consuming, influence to control the vehicle or quickly rubbing of the tire, even blowout. It is inconvenient for drivers to find places or get help for pumping when needed.
The present invention is to provide a portable tire pump for drivers to keep the tire pressure normally if needed.
The portable tire pump of the present invention is reusable to be environmental friendly.
Accordingly, the portable tire pump of the present invention includes a small gas bottle refillable of high-pressure gas and a control device. The gas bottle includes a connector for the gas flowing out and a venting valve formed on the top thereof. The control device has a connecting end for the connector of the gas bottle connected thereto and a distal end opposite to the connecting end formed with an opening. Inside the control device, it is provided an inlet channel with one end connected to the connecting end, an outlet channel with one end connected to an air injecting tub, an inner tank, with a first diameter, connected with the other ends of the inlet and the outlet channels, a middle tank, with a second diameter larger than the first diameter, connected to the inner tank, an outer tank, with a third diameter larger than the second diameter, connected between the middle tank and the opening, a block including a first, a second and a third sections and a through channel formed inside, the first section being located in the inner tank to block the connection of the inlet channel and the inner tank, the second section, with a diameter larger than that of the first section and substantially equal to but smaller than the second diameter, being connected between the first and the third sections, the third section, with a diameter larger than that of the second section and substantially equal to but smaller than the third diameter, being located in the outer tank, a first spring installed in the middle tank to press on the third section, a plug, with a cavity formed on an inner surface thereof, mounted in the opening, and a second spring located in the cavity to press on the third block section.
The present invention will become more fully understood from the detailed description given hereinbelow illustration only, and thus are not limitative of the present invention, and wherein:
A portable tire pump of the present invention helps the drivers capable of inflating the tires to normal pressure instantly so that various dangers and inconvenience can be prevented.
Referring to
Inside the control device 2, an inlet channel 22, an outlet channel 24, an inner tank 26 connected with the inlet and the outlet channels 22 and 24, a middle tank 28 connected to the inner tank 26, an outer tank 30 connected to the middle tank 28 and an opening 34 connected to the outer tank 30 are provided. The opening 34 with an interior thread 32 is formed at a distal end opposite to a connecting end 50 of the control device 2. The inner, the middle, the outer tanks 26, 28, 30 and the opening 34 are in a telescopic structure with successively expanding diameters. There are through holes 35 formed on two sides of the control device 2 to connect to the inner tank 26 and a residual gas monitoring channel 36 with one end connected to the inlet channel 22 and the other end connected to a pressure gauge 46.
The outlet channel 24 is connected to an air injecting tube 38. Another pressure gauge 40 and a switch 41 are connected with the air injecting tube 38. The distal end of the air injecting tube 38 is formed an engaging element 42 to securely connect with a pumping tube 43, or an adapter 44 can be additionally used for connection, as shown in
The connecting end 50 is for the connector 12 to connect to the inlet channel 22. The control device 20 further includes a fixing element 52 to secure the connection of the connecting end 50 and the connector 12.
In the preferred embodiment, the fixing element 52 includes a base 54 and two arms 56 extending from the base 54 to be connected between the main body of the control device 12 and the base 54. A screw column 58 with a rotator 60 at bottom can pass through the base 54 to have the tiptop push against on the outer surface of the connector 12 so that the connector 12 can be closely fastened on the connecting end 50.
A block 62 including telescopic first, second and third sections 64, 66 and 68 and a through channel 76 formed inside the block 62 is installed in the tanks 26, 28, 30. The through channel 76 has one end open to the side of the first block section 64 and the other end open to the bottom of the third block section 68. The first block section 64 with a diameter smaller than that of the inner tank 26 is wholly located in the inner tank 26. The second block section 66 with a diameter larger than the first section 64 and substantially equal to but smaller than that of the inner tank 26 is connected between the first and the second block sections 62 and 64. The third block section 68 with a diameter larger than the second section 66 and substantially equal to but smaller than that of the outer tank 30 is wholly located in the outer tank 30. Moreover, there are O-rings 70 and 74 mounted between the second block section 66 and the inner tank 26 and between the third block section 68 and the outer tank 30 for sealing. A spring 72 is installed in the middle tank 28 to press on the third block section 68.
A plug 78 for positioning the block 62 and the spring 72 inside the tanks 26, 28, 30 is mounted in the opening 34. The plug 78 has an outer thread 80 engaged with the inner thread 32 of the opening 34 to screw therein. A cavity 82 is formed on an inner surface of the plug 78 to have another spring 84 located therein to press on the third block section 68 from the bottom side. In order to facilitate screwing of the plug 78, a line or cross slot is formed on an outer surface of the plug 78 for conveniently using a coin or by a screw driver to screw the plug 78 in the opening 34.
Referring to
Finally, as shown in
The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
