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Patent Searching and Data


Title:
PUMP DEVICE
Document Type and Number:
Japanese Patent JPH04113080
Kind Code:
A
Abstract:

PURPOSE: To obtain a pump device having pump transporting function with a simple structure by providing seal system having one-way valve function in two or more axially separate positions, the constitution being such that the gas flowing directions are reversed to each other, and the axially right- angled sectional areas of the seal parts are differed to each other.

CONSTITUTION: A first seal system 5 is formed of a circumferential channel 51 formed on the outer circumferential wall of a piston body 2 and a ring member fitted to the circumferential channel 51. In contrast to the first seal system 5, a second seal system 9 has a circumferential channel 91 formed on the end wall part inner circumferential wall of a cylinder member 1, and a ring member is fitted to the circumferential channel 91. When the piston member is moved in the right direction shown in the drawing, the first seal system 5 prevents the outflow of a gas from a high pressure side space 11 to a low pressure side space 12, and the second seal system 9 increases the pressure A in the space 11 while suppressing the gas leak from a high pressure side compression gas tank 10 to the low pressure side space 11. Thus, the combination of two seal systems having one-way valve function enhances reduction in size weight, and cost.


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Inventors:
IWAMOTO SHOICHI
TODA FUJIO
MATSUO MASAHIRO
Application Number:
JP22659190A
Publication Date:
April 14, 1992
Filing Date:
August 30, 1990
Export Citation:
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Assignee:
IWAMOTO SHOICHI
TODA FUJIO
MATSUO MASAHIRO
International Classes:
F04B39/00; F04B25/02; F04B39/10; F16J9/06; F16J9/08; F16J9/16; F16J15/46; (IPC1-7): F04B39/00; F16J9/06; F16J9/16; F16J15/46
Attorney, Agent or Firm:
Fumio Sasashima