Patent Application
20060289184
1. Field of Invention
The present invention relates to a pneumatic tool, more particularly to a pneumatic tool having noise suppressors.
2. Description of the Related Art
With reference to
The body (51) has a front end, a rear end, an outer surface, a rotor (52), a recess (510) and multiple exhaust channels (511). The rotor (52) is mounted on the front end of the body (51). The recess (510) is defined in an outer surface at the front end of the body (51). The multiple exhaust channels (511) are respectively defined in a periphery defining recess (510).
The chuck bracket (50) is mounted on the front end of the body (51).
The exhaust ring (53) is mounted on the recess (510) in the body (51) and has multiple exhaust channels (530). The multiple exhaust channels (530) are defined in the exhaust ring (53) for venting used air.
However, when air exhausts from the exhaust channels (511, 530), it will make a loud noise, often 98 decibels and above. The cacophony will make a user who is using the pneumatic tool feel annoyed and impatient, furthermore, the loud noise hurts users' ears. Also, although mufflers may be mounted on the pneumatic tools, they will make whole the pneumatic tool become too bulky.
Thus, a real need exists for a pneumatic tool that is quiet and has a small physical volume.
The primary objective of the present invention is to provide a pneumatic tool that has a noise suppressor.
The pneumatic tool in accordance with the present invention has a body, a chuck bracket, an exhaust ring and a noise suppressor. The body has a recess and multiple exhaust channels. The exhaust channels are respectively defined in a periphery defining recess. The chuck bracket is mounted on the front end of the body. The exhaust ring is mounted on the recess in the body and multiple exhaust channels are defined in the exhaust ring. The noise suppressor is mounted between the recess in the body and the exhaust ring, and is made of a piece of material that is sound absorbent and air absorbent.
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 FIGS. 1 to 4 and
The body (20) has a diameter, a front end, an outer surface, a recess (21), multiple exhaust channels (210), a rotor (25) and a cylinder (26). The recess (21) is defined in the outer surface of the body near the front end of the body (20) and has a diameter. The diameter of the recess (21) is smaller than the diameter of the body (20). The exhaust channels (210) are respectively defined in a periphery defining recess (21) for venting spent air. The rotor (25) is mounted inside the body (20) and near the front end. The cylinder (26) is mounted inside the body (20) and surrounds the rotor (25).
The chuck bracket (10) is mounted on the front end of the body (20) and is used for connecting a tool chuck, such as a drill.
The exhaust ring (30) is mounted over the recess (21) in the body (20) and has multiple exhaust channels (31) that vent exhausted air. With reference to
The noise suppressor (40, 40A, 40B) is mounted on the recess (21) in the body (20) and seals the exhaust channels (210) in the body (20). The noise suppressor (40, 40A, 40B) may be a belt, a loop etc. The noise suppressor (40, 40A, 40B) may be made of textile, resilient material, plastic material or material that can absorb noise. The noise suppressor (40, 40A, 40B) should be a porous, resilient material and must be very thin for mounting inside the chamber (200) between the recess (21) and the exhaust ring (30). With reference to
With reference to
With reference to
The two semi-housings (61) are combined together to form a house, and the house has a handle (600) and a top case (610). The handle (600) is integrally formed with the top case (610). The handle (600) has a bottom end, an air input (611) and a recess (612). The air input (611) is defined in the bottom end of the handle (600). The body (62) is partially mounted inside top case (610) in the housings (61) and has a diameter, a front end, an outer surface, a recess (64) and multiple exhaust channels (640). The recess (64) is defined in the outer surface of the body and has a diameter. The diameter of the recess (64) is smaller than the diameter of the body (62). The exhaust channels (640) are respectively defined in the recess (64) for venting exhaust air. A rotor is mounted inside the body (62).
The muffler (70) is mounted inside the recess (612) defined in the handle (600). The muffler (70) may be any kind of a conventional muffler (70), and a second noise suppressor (71) is mounted around the muffler (70).
The first noise suppressor (80) is mounted inside the recess (64) as described above. Noise made by the pneumatic tool will be absorbed by the first noise suppressor (80) and the second noise suppressor (71) such that an optimum noise reduction feature is achieved.
Because the noise made the pneumatic tool can be absorbed by the noise suppressor (40, 40A, 40B, 71, 80) mounted around the recess (21, 64, 612) in the body (20, 61), the noise can be reduced to about 85 to 86 decibels, whereby the damage caused by the noise will be reduced and prevent a user from becoming annoyed and impatient.
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.
