Title:
SPRING MADE OF RESIN AND BELLOWS TYPE QUANTITATIVE PUMP USING THE SPRING
Document Type and Number:
Japanese Patent JP3676890
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide strength approximately equal to that of a spring made of a metal by resin alone, to hold a given strength for a long period by suppressing lowering with the lapse of time of the strength, and improve quantitative ability of a bellows type quantitative pump.
SOLUTION: A belt-like sheet made of resin (PTFE) is folded in a zigzagging state along the longitudinal direction thereof with a curvature R of a given expansion state and formed such that the sides of adjoining folded parts 21a having a given curvature approach each other or make contact with each other. The folded part 21a having the given curvature is elastically expandly and conbtractingly constituted through heating holding and cooling. A so formed spring 20 made of resin (PTFE) is used as a spring for a check valve on the tip side of the deliver hole of a bellows type quantitative pump.
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Inventors:
Kiyoshi Nishio
Application Number:
JP25340996A
Publication Date:
July 27, 2005
Filing Date:
September 25, 1996
Export Citation:
Assignee:
Nippon Pillar Industry Co., Ltd.
International Classes:
F04B39/10; F04B43/02; F04B53/10; F04B43/08; F16F1/02; F16F1/18; F16F1/36; F16F1/366; (IPC1-7): F16F1/18; F04B43/08
Domestic Patent References:
| JP8240274A | ||||
| JP670007U | ||||
| JP3234753A | ||||
| JP7279851A | ||||
| JP8145100A | ||||
| JP1502770A | ||||
| JP5763245A | ||||
| JP596750A | ||||
| JP77770U | ||||
| JP6110049Y2 |
Attorney, Agent or Firm:
Koichi Suzue
Shoji Suzue
Shoji Suzue