Differential Pressure Type Inflating Device

Abstract

A differential pressure type inflating device, adapted for fast inflating the devices that need inflating, comprises a gas container, a relief valve, a gas nozzle, a pipe joint, a switchvalve, and a relief pipe. When external high pressure gas enters the gas container and renders the gas pressures in the gas container and the relief pipe reaching a balance condition, the switchvalve can be pressed to generate pressure drop in the relief pipe, which launches the relief valve and discharges the high pressure gas in the gas container from the gas nozzle. In this design, the gas container, relief valve, gas nozzle, relief pipe, and pipe joint are connected with screwing structures, so as to achieve the function of easy assembling.

Claims

1. A differential pressure type inflating device for inflating an equipment needed to be inflated, comprising: a gas container, adapted for storing high pressure gas from outside, comprising a container body and a connecting ring and a locking ring respectively formed on a front end and an upper portion of said container body, wherein an inner edge of said connecting ring has a screwing portion formed thereon, and an inner edge of said locking ring also has an internal threaded portion formed thereon; a relief valve, comprising a valve body, a piston unit arranged in said valve body, and a resilient member connected between said valve body and said piston unit, wherein said valve body has a plurality of vent holes formed therein, an inner locking portion and an outer locking portion formed on one end thereof, and a screw locking portion formed on another end thereof, wherein said outer locking portion is screwed to said screwing portion of said connecting ring, and said piston unit is pushed by said resilient member to sealingly close said vent holes; a gas nozzle, comprising a pipe unit screwed to said inner locking portion of said relief valve and a pipe head extended from said pipe unit; a pipe joint, which is screwed to said internal threaded portion of said locking ring, providing an upper inner screw portion and a lower inner screw portion; a switch valve screwed to said upper inner screw portion of said pipe joint; and a relief pipe, arranged between said relief valve and said pipe joint, wherein two ends of said relief pipe have a first screwing end and a second screwing end formed thereon respectively, wherein said first screwing end is screwingly mounted on said screw locking portion of said relief valve, wherein said second screwing end is screwingly arranged on said lower inner screw portion of said pipe joint, wherein when external high pressure gas enters said gas container and renders the gas pressures in said gas container and said relief pipe reaching a balance condition, said switch valve is able to be pressed to generate a pressure drop in said relief pipe that triggers said relief valve to actuate and discharge high pressure gas in said gas container through said gas nozzle.

2. The differential pressure type inflating device, as recited in claim 1, further comprising a ring handle mounted on the exterior of said container body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a perspective view of the differential pressure type inflating device according to a preferred embodiment of the present invention.

[0010] FIG. 2 is a partial exploded view of the differential pressure type inflating device according to the above preferred embodiment of the present invention.

[0011] FIG. 3 is a sectional view of the differential pressure type inflating device according to the above preferred embodiment of the present invention.

[0012] FIG. 4 is a sectional and enlarged view of the connection of part of the elements of the differential pressure type inflating device according to the above preferred embodiment of the present invention.

[0013] FIG. 5 is a sectional and enlarged view of the connection of another part of the elements of the differential pressure type inflating device according to the above preferred embodiment of the present invention.

[0014] FIG. 6 is a perspective view of the differential pressure type inflating device according to the above preferred embodiment of the present invention illustrating the action of the switch valve.

[0015] FIG. 7 is a perspective view of the differential pressure type inflating device according to the above preferred embodiment of the present invention illustrating the action of the relief valve.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0016] Referring to FIGS. 1-5, the differential pressure type inflating device according to a preferred embodiment of the present invention can store high pressure gas generated by external pneumatic source and conduct fast inflating to devices that needs inflation or gas charging, such as tires. The differential pressure type inflating device comprises a gas container 2, a relief valve 3, a gas nozzle 4, a pipe joint 5, a switch valve 6, a relief pipe 7, and a ring handle 8.

[0017] The gas container 2 is adapted for storing high pressure gas from outside. It comprises a container body 21 and a connecting ring 22 and a locking ring 23 respectively formed on a front end and an upper portion of the container body 21. The inner edge of the connecting ring 22 has a screwing portion 221 formed thereon. The inner edge of the locking ring 23 also has an internal threaded portion 231. Besides, based on the safety concerns and in order to adapt for external pneumatic source, the container body 21 also has an air cock, piezometer, and decompression valve. However, because these are not the features of the present invention, the details thereof are skipped.

[0018] The relief valve 3 comprises a valve body 31, a piston unit 32 arranged in the inside of the valve body 31, and a resilient member 33 connected between the valve body 31 and the piston unit 32. The valve body 31 is hollow, so as to accommodate the piston unit 32 and the resilient member 33. The middle of the valve body 31 also has a plurality of vent holes 311 spacingly formed thereon. An inner locking portion 312 and an outer locking portion 313 are formed on one end of the valve body 31, while a screw locking portion 314 is formed on another end of the valve body 31. The outer locking portion 313 is screwed to the screwing portion 221 of the connecting ring 22. The piston unit 32 is pushed by the resilient member 33 in a normal state to sealingly close the vent holes 311. When pressure difference occurs between the inside and outside of the relief valve 3, the piston unit 32 stops closing the vent holes 311.

[0019] The gas nozzle 4 comprises a pipe unit 41 screwed to the inner locking portion 312 of the relief valve 3 and a pipe head 42 extended from the pipe unit 41. The pipe head 42 can be made into various forms based on the needs. The pipe unit 41 and the relief valve 3 are mutually screwingly connected, which facilitates the assembling.

[0020] The pipe joint 5 is screwed to the internal threaded portion 231 of the locking ring 23, providing an upper inner screw portion 51 and a lower inner screw portion 52.

[0021] The switch valve 6 is screwed to the upper inner screw portion 51 of the pipe joint 5. Under the normal state, the switch valve 6 is in a close state.

[0022] The relief pipe 7 is arranged between the relief valve 3 and the pipe joint 5. Two ends of the relief pipe 7 have a first screwing end 71 and a second screwing end 72 formed thereon respectively. The first screwing end 71 is screwingly mounted on the screw locking portion 314 of the relief valve 3, while the second screwing end 72 is screwed to the lower inner screw portion 52 of the pipe joint 5.

[0023] The ring handle 8 is affixed on the outside of the front end of the container body 21 for holding, which facilitates the operating and moving of the inflating device 1.

[0024] The assembling of the elements according to the present invention includes the followings. First, the relief pipe 7 is put into the container body 21 through the connecting ring 22 of the gas container 2. Then, the pipe joint 5 is screwingly connected on the internal threaded portion 231 of the locking ring 23 and the lower inner screw portion 52 is screwingly connected with the second screwing end 72 of the relief pipe 7 as well. Next, the screw locking portion 314 of the relief valve 3 and the first screwing end 71 of the relief pipe 7 are correspondingly screwingly connected with each other. The outer locking portion 313 also screwingly mounted on the screwing portion 221 of the connecting ring 22. Lastly, the pipe unit 41 of the gas nozzle 4 and the inner locking portion 312 are screwingly connected and the switch valve 6 is screwed to the upper inner screw portion 51 of the pipe joint 5 to complete the assembling of the inflating device 1. In order to reinforce the leakproofness among the elements, sticky glue or gum can be respectively applied on the screwing junctions.

[0025] When external high pressure gas enters the gas container 2 via the air cock of the gas container 2, besides filling the inside of the container body 21, the high pressure gas also enters the relief pipe 7 via the middle of the piston unit 32 and the valve body 31 of the relief valve 3 and eventually reaches pressure balance. Referring to FIG. 6, when pressing switch valve 6, the gas pressure in the relief pipe 7 will be released instantly via the switch valve 6 to outside, which causes the inner pressure of the relief pipe 7 lower than the gas pressure of the gas container 2. The high pressure gas in the gas container 2 will then push the piston unit 32 to compress the resilient member 33 as FIG. 7 illustrated, so as to make the high pressure gas in the gas container 2 to discharge to the outside from the vent hole 311 via the gas nozzle 4 for tire inflation.

[0026] The design of the present invention has the gas container 2, relief valve 3, gas nozzle 4, relief pipe 7, and pipe joint 5 to be interconnected with screwing structures, which actually achieves the function of easy assembling contrasting to the welding connections among the elements of the prior art.

[0027] One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

[0028] It will thus be seen that the objects of the present invention have been fully and effectively accomplished. The embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.