Flow check prevention mechanism
US4582295A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1985 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Jul 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87973
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention relates to a flow check prevention mechanism especially useful in a female coupler for preventing closure of a male coupler coupled thereto should a vacuum occur in the female coupler when fluid flow out of the female coupler is momentarily blocked. The female coupler includes a housing having a bore formed therein with a receptacle movably positioned within the bore. The receptacle contains a main cavity which is connected by a passageway to an engagement bore. The engagement bore receives the male coupler. Located within the receptacle is a main poppet valve which controls the fluid flow through the passageway and a secondary poppet valve which relieves fluid pressure from the main cavity through an outlet port. The female coupler also includes a movable piston which assists in moving the main valve against excessive pressure which may be contained within the male coupler and a collar member which limits the travel of the main valve. The female coupler further includes a flow check prevention valve positioned within the main cavity which assures that the pressure impinging on the piston will be equal to or greater than the pressure present in the remainder of the m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.