Exhaust end structure of a straight pneumatic wrench

Abstract

An exhaust end structure of a straight pneumatic wrench, including: a main body having a housing, at least one exhaust ports being formed on a wall of the housing for communicating an internal exhaust passage of the housing with outer atmosphere; and a tubular guide member, a first end of the guide member being connected with a section of the housing around the exhaust ports, whereby the exhaust ports only communicate with an interior of the tubular guide member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective assembled view of a conventional straight pneumatic wrench;

FIG. 2 is a perspective assembled view of a preferred embodiment of the present invention;

FIG. 3 is a perspective exploded view of the preferred embodiment of the present invention;

FIG. 4 is a side view of the preferred embodiment of the present invention;

FIG. 5 is a partially sectional view taken along line 5-5 of FIG. 4; and

FIG. 6 is a perspective view of the tubular guide member of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 2 to 6. The exhaust end structure 10 of the straight pneumatic wrench of the present invention includes a main body 20 and a guide member 30.

The main body 20 has a configuration similar to that of prior art. The main body 20 has a housing 21. Several exhaust ports 22 are formed on a bottom wall of the housing 21 for communicating an internal exhaust passage of the housing 21 with the outer atmosphere. The main body 20 further has an engaging section 23. The engaging section 23 has a hollow projecting block 231 protruding from the bottom of the housing 21 to form an obliquely retracted end face. The exhaust ports 22 are formed on the obliquely retracted end face. Two symmetrical engaging slots 232 are disposed on one side of the projecting block 231.

The guide member 30 includes a bighted end cap 31. A first end of the end cap 31 is inserted with the obliquely retracted end face of the projecting block 231. The end cap 31 has two symmetrical resilient engaging tongues 32 respectively extending from outer circumference of the end cap 31 corresponding to the engaging slots 232. The engaging tongues 32 are respectively engaged in the engaging slots 232 to locate the first end of the end cap 31 on the projecting block 231. The guide member 30 further includes an extension tube 33 with a certain length. A first end of the extension tube 33 is axially serially connected with a second end of the end cap 31.

According to the above arrangement, when the compressed gas goes through the internal exhaust passage of the straight pneumatic wrench to the exhaust ports 22, the compressed gas is restricted and guided by the guide member 30 to only escape from a second end of the extension tube 33 to the atmosphere. Accordingly, by means of the guide member 30, the exhausted gas is guided in a direction away from the operator and the work piece. This minimizes the possibility of accident in the working site and reduces the pollution of environment. Moreover, The operational noise is prevented from being directly emitted through the exhaust ports 22. Therefore, the guide member 30 serves to achieve a certain muffling effect.

Alternatively, the guide member 30 can be one single flexible tube. One end of the flexible tube is directly fixedly connected with a section of the housing around the exhaust ports 22. In other words, the guide member 30 can be any tubular conduit with a certain length for guiding the exhausted gas to a certain position outside the housing of the straight pneumatic wrench. The guide member can prevent the gas from directly impacting a worker or a work piece. Also, the guide member can lower the noise.

The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.

Claims

1. An exhaust end structure of a straight pneumatic wrench, comprising: a main body having a housing, at least one exhaust ports being formed on a wall of the housing for communicating an internal exhaust passage of the housing with outer atmosphere; anda tubular guide member, a first end of the guide member being connected with a section of the housing around the exhaust ports, whereby the exhaust ports only communicate with an interior of the tubular guide member.

2. The exhaust end structure of the straight pneumatic wrench as claimed in claim 1, wherein the guide member includes a tubular end cap, a first end of the end cap being connected with a section of the housing around the exhaust ports, the guide member further includes an extension tube with a predetermined length, a first end of the extension tube being serially connected with a second end of the end cap.

3. The exhaust end structure of the straight pneumatic wrench as claimed in claim 2, wherein the end cap has two ends each having an opening, the axes of the openings of the two ends of the end cap containing a predetermined angle.