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Piston-reciprocating gas compressor

a gas compressor and compressor technology, applied in the direction of positive displacement liquid engines, pump components, piston pumps, etc., can solve the problems of noise leakage, dust in the air, and inability to completely seal the electric motor,

Inactive Publication Date: 2007-02-22
ANEST IWATA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] In order to overcome the disadvantages in the prior art, it is an object of the invention to provide a piston-reciprocating gas compressor that overcomes the disadvantages involved by an electric motor mounted outside a crankcase.

Problems solved by technology

If the gas is toxic, it will cause environmental contamination.
Thus, it is not possible to seal the electric motor completely thereby rendering noise to leak and / or making dusts in air and solid components remain in each part of the electric motor 32 and motor casing 36.

Method used

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  • Piston-reciprocating gas compressor

Examples

Experimental program
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Effect test

Embodiment Construction

[0013]FIG. 1 is an embodiment of a piston-reciprocating gas compressor according to the present invention.

[0014] A discharge check valve 3 is provided in a top wall 2 of a cylinder 1, and a discharge chamber 5 having an outlet 4 is formed on the top wall 2. The lower end of the cylinder 1 is connected to a sealed crankcase 6. A motor casing 8 having a gas-introducing hole 7 at the end is connected to one side of the crankcase 6 via gas-guiding holes 9,9.

[0015] A motor 10 is provided in the motor casing 8, and a drive shaft 11 is integrally formed with a crankshaft 13 pivotally mounted in bearings 12,12 in the crankcase 6.

[0016] The end of a piston rod 15 of a piston 14 in the cylinder 1 is pivotally mounted to the crankshaft 13 via a bearing 16.

[0017] There is formed a gas-guiding groove 17 in the inner surface of the cylinder 1. The lower end of the gas-guiding groove 17 communicates with the inside of the crankcase 6. When the piston 14 is in the lowest position, the upper end...

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PUM

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Abstract

A drive shaft is driven by an electric motor in a motor casing. A crankshaft integrally connected with the drive shaft is provided in a crankcase. A piston is reciprocated by the crankshaft in a cylinder. A gas is introduced from the outside into the motor casing and forwarded into the crankcase. The gas is further guided into a space on the piston through a gas-guiding groove formed in the inner circumference of the cylinder. The piston moves up to compress the gas in the space while the piston closes the upper end of the gas-guiding groove, so that the gas is discharged to the outside.

Description

[0001] This application claims priority from Japanese Application Serial No. 2005-238685 filed Aug. 19, 2005. BACKGROUND OF THE INVENTION [0002] The present invention relates to a piston-reciprocating gas compressor compressing a gas by reciprocating a piston. [0003] As shown in FIG. 2, a piston-reciprocating gas compressor is known, in which a discharge check valve 23 and a suction check valve 24 are provided at one side and the other side of a top wall 22 of a cylinder 21. On the discharge check valve 23 and suction check valve 24, a suction chamber 26 having an inlet 25 and a discharge chamber 28 having an outlet 27 are provided respectively. In a crankcase 29 under the cylinder 21, a crankshaft 31 is integrally connected to a drive shaft 30. A drive shaft 30 is driven by an electric motor 32 outside the crankcase 29, so that a piston 34 in the cylinder 21 is reciprocated by the crankshaft 31 via a piston rod 33. A gas such as N2 sucked from the inlet 25 is introduced into a spac...

Claims

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Application Information

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IPC IPC(8): F04B27/08
CPCF04B35/04F04B39/0016F04B39/066
Inventor INOUE, HIROSHIKAWAMOTO, AKIRA
Owner ANEST IWATA CORP