Patent Application
20200102972
The present invention relates to a compressed gas supplier, especially to a compressed gas supplier for a pneumatic tool.
Pneumatic tools are widely used and are driven by compressed air. Comparing with the electric power tools, the pneumatic tools are safer to operate and to maintain since there is no risk of sparks, short circuit, electrocution and so on. The compressed air is usually provided by an air compressor. However, the air compressor is heavy and takes a certain space. When the user needs to work at places that are not convenient for bringing such a heavy and large things such as working at height or narrow places, the user cannot use the air compressor. Then the user may have to give up the pneumatic tools and prepare the electric power tools for working in such places. Preparing both the pneumatic tools and the electric power tools is not economic for the users. Therefore, the conventional way to supply the compressed air to the pneumatic tools needs to be modified.
To overcome the shortcomings, the present invention provides a compressed gas supplier for a pneumatic tool to mitigate or to obviate the aforementioned problems.
The present invention provides a compressed gas supplier for a pneumatic tool. The compressed gas supplier has a power-free decompression device and an expansion chamber. The power-free decompression device decompresses a gas in a high-pressure source into a decompressed gas. The expansion chamber connects to the power-free decompression device and receives and stores the decompressed gas. The pneumatic tool is driven by the decompressed gas in the expansion chamber. Thus, the compressed gas supplier for the pneumatic tool is small and easy to be carry. In addition, the decompressed gas stored in the expansion chamber is also benefit for supplying decompressed gas to the pneumatic tool that needs much gas to drive.
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.
With reference to
The power-free decompression device 10 connects to a high-pressure source 30 to decompress the gas in the high-pressure source 30 into a decompressed gas that is at the desired pressure for the pneumatic tool 40. For example, the pressure of the gas in the high-pressure source 30 may be 3000 psi, and the desired pressure for the pneumatic tool 40 may be 90 psi. The expansion chamber 20 connects to the power-free decompression device 10 to receive and to preserve the decompressed gas. Then the decompressed gas is output from the expansion chamber 20 to a pneumatic tool 40 so that the pneumatic tool 40 can be driven by the decompressed gas. In one embodiment, the power-free decompression device 10 may be a regulator.
With further reference to
With reference to
With reference to
The piston 121 is mounted slidably in the decompression room 115, selectively blocks the communication between inlet channel 113 and the decompression room 115, and has a first end, a second end, an enlarged head 121a, and a central opening 121b. The enlarged head 121a is formed on the second end of the piston 121 and has a first side and a second side. The central opening 121b is formed through the first and second ends, selectively communicates with the inlet channel 113 and communicates with the outlet channel 114.
The first resilient member 122 is mounted in the decompression room 115 and abuts against the second side of the enlarged head 121a to push the piston 121 to slide away from the outlet channel 114.
The sealing member 123 is mounted in the decompression room 115 and selectively abuts against the first end of the piston 121 to selectively block the communication between inlet channel 113 and the decompression room 115. In one embodiment, the sealing member 123 comprises a washer 123a and a screw 123b. The washer 123a selectively abuts against the first end of the piston 121 to selectively block the communication between inlet channel 113 and the decompression room 115. The screw 123b is mounted through the housing 11, holds the washer 123a to selectively moves the washer 123a axially.
The pressure setting unit 124 is mounted in the decompression room 115, is clamped between the piston 121 and the sealing member 123 to selectively block the communication between inlet channel 113 and the decompression room 115. In one embodiment, the pressure setting member 124 comprises an adjusting element 124a and a second resilient member 124b. The adjusting element 124a selectively abuts against the sealing member 123 to selectively block the communication between inlet channel 113 and the decompression room 115. The second resilient member 124b is clamped between the adjusting element 124a and the first side of the enlarged head 121a of the piston 121 to push the adjusting element 124a to abut against the sealing member 123.
In one embodiment, the first and second resilient elements 122, 124b may be springs, a plurality of resilient washers and so on. In one embodiment, a plurality of airproof elements may be mounted in the decompression room 115 to keep the gas from leaking. The airproof elements may be O-rings and may be mounted around the piston 121 and the pressure setting member 124.
With reference to
Since the entry 201 and the releasing hole 202 are both on the first end of the expansion chamber 20, the decompressed gas may directly flow out the releasing hole 202 without entering deeper into the expansion chamber 20. If the high-pressure source 30 provides some gas that contains liquid after decompressing such as carbon dioxide, the aforementioned flow path may cause the liquid to enter the pneumatic tool 40. Thus, an elongated tube 21 may connects to and communicates with the outlet 112 of the housing 11, protrudes through the entry 201 and protrudes close to the second end of the expansion chamber 20. Thus, the decompressed gas output from the outlet 112 of the housing 11 flows through the elongated tube 21 to be distant from the releasing hole 202.
The expansion chamber 20 may have different embodiments. In one embodiment as shown in
With reference to
With reference to
With reference to
Since the second resilient element 124b provide predetermined resilient force, the adjusting element 124a are pushed back by the gas in the outlet channel 114 when the pressure of the gas in the outlet channel 114 and the expansion chamber 20 adding the predetermined resilient force of the second resilient element 124b is larger than the pressure in the high-pressure source 30, which is shown in
The desired pressure of the gas in the expansion chamber 20 may be different according to the need of the pneumatic tool 40. The screw 123b may be screwed deeper or shallower to adjust the pressure of the gas in the expansion chamber 20. When the screw 123b is screwed deeper or shallower, the axial position of the washer 123a is adjusted so that the initial position of the adjusting element 124a is changed accordingly. Then the predetermined resilient force of the second resilient element 124b is changed accordingly. With reference to
In another embodiment, the decompression assembly 12 may not comprise the pressure setting member 124. The desired pressure of the gas in the expansion chamber 20 may be determined by the first resilient element 122.
The compressed gas supplier in accordance with the present invention has the following advantages. With the compressed gas supplier as described, carrying the high-pressure source 30 and the compressed gas supplier as described is enough to provide sufficient pneumatic power to the pneumatic tool 40. Since the high-pressure source 30 and the compressed gas supplier as described are way smaller and lighter than an air compressor, the user could use the pneumatic tool 40 with the high-pressure source 30 and the compressed gas supplier as described at much more places that may be high, narrow or small. Moreover, since some pneumatic tool 40 needs much gas to drive the decompressed gas is enough to drive the pneumatic tool 40 with the expansion chamber 20 to store the decompressed gas.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
