Title:
燃料キャップ
Document Type and Number:
Japanese Patent JP4380472
Kind Code:
B2
Abstract:
A fuel cap of the invention has a pressure regulating valve, which includes a positive pressure valve and a negative pressure valve. The positive pressure valve has a positive pressure valve plug and a first spring, whereas the negative pressure valve has a negative pressure valve plug and a second spring. A valve support member is located in the upstream of the negative pressure valve to support the positive pressure valve plug. A tubular body is integrally formed with the valve support member. The tubular body eliminates the turbulence of the inflow of the air current and leads the laminar air flow into the negative pressure valve in its open position. This arrangement of the invention effectively increases the maximum flow rate of the negative pressure valve in the open position.
Inventors:
Hiroyuki Hagano
Application Number:
JP2004250211A
Publication Date:
December 09, 2009
Filing Date:
August 30, 2004
Export Citation:
Assignee:
Toyoda Gosei Co., Ltd.
International Classes:
B65D51/00; B60K15/05; B65D51/16; F16K17/196; F16K24/00
Domestic Patent References:
| JP10278958A | ||||
| JP63162469A | ||||
| JP60179654U | ||||
| JP54074026A |
Attorney, Agent or Firm:
Meisei International Patent Office