Pneumatic hammering device
专利汇可以提供Pneumatic hammering device专利检索，专利查询，专利分析的服务。并且PURPOSE: To perform pile driving utilizing full energy employed, eliminating pile damaging and reducing hammering noise by a method wherein the timing for feed and stop-feed of high pressure gas is regulated and the use of expanding power is fully displayed.
CONSTITUTION: When a switch is ON, the high pressure gas enters at first into the intake tube 7a then to the loop space 16 that is provided at the bottom of a cylinder 1' through the feeder tube 8, pushing up the weight 3' further to the level where the intake port 7 is opened then enters to the cylinder 1' through the tube 7. When the ram 3' is pushed up further, the circuit switch S
1 and S
2 are closed and consequently the control valve 2' is closed and the supply of high pressure gas is suspended. The remaining high pressure gas in the cylinder 1', while expanding, pushes up the weight 3' further to the level where the intake-exhaust hole 10 is opened, then fed to the intake hole of the compressor P through the hole 10 while the gas is in its finish expansion stage. The gas pressure finally reaches below the atmospheric pressure inducing the open air into the cylinder, causing the weight 3' to fall under its own weight. The gas within the cylinder 1' is compressed to some extent being induced into the compressor P through the intake-exhaust port 10 and after the weight 3' falls the port 10 is closed, causing the air in the cylinder 1' to be compressed again, thereby reducing the falling speed of the weight 3'.
COPYRIGHT: (C)1981,JPO&Japio，下面是Pneumatic hammering device专利的具体信息内容。
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