1. Field of the Invention
The present invention relates generally to a reciprocating pneumatic tool, and more particularly to an innovative one which is designed with an integrated module of a cylinder and flow reversing assembly.
2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
Reciprocating pneumatic tools such as pneumatic saws, pneumatic hammers and pneumatic cutters, are available with different functions depending on the shapes of the ends.
According to the operating principle of reciprocating pneumatic tools, the source of air is firstly guided into the tool, then the opening/closing of air pressure is controlled by a control valve, and an actuating module is used for automatic reversing of air pressure, enabling the reciprocating movement of a piston rod together with the ends of tools (e.g.: saw blade, punch hammer).
In view of the structural design of the reciprocating pneumatic tool, the number of components affects directly the cost and efficiency of fabrication, processing and assembly, and the defective fabrication and assembly increase with the growing number of components. Thus, due attentions must be paid to the technical issue of minimizing the structural members in the process of R&D and design.
As for the structural design of a conventional reciprocating pneumatic tool similar to the present invention, Taiwan patent claim No. 96133970: “A Reciprocating Pneumatic Tool” can be referenced, and the general configuration and pattern are shown therein. The flow reversing assembly of the prior art is structurally composed of a top plate, a principal pedestal and a base plate. The flow reversing assembly is superposed onto the surface of a cylinder. It is found from actual applications that the flow reversing assembly of the prior art must be provided with several overlapped plates, and then superposed onto a cylinder. Such an overlapping structure brings about much increase of fabrication, processing and assembly cost of structural members as well as poorer efficiency, meanwhile a higher defect may occur against the performance and quality of finished products. Furthermore, in order to realize accurate fitness and high air-tightness of unit components, the assembly surface of every unit component will be subject to time-consuming and costly precise processing, leading to higher fabrication cost with poorer industrial and economic benefits.
Thus, to overcome the aforementioned problems of the prior art, it would be an advancement if the art to provide an improved structure that can significantly improve the efficacy.
Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products.