Abstract A one-way flap-valve assembly is disclosed wherein a valve seat assembly includes a ferromagnetic cylinder surrounding a valve port, and a valve closure member includes a ferromagnetic portion and a flap resilient membrane portion. The flat resilient membrane portion has a hinge portion which is attached to the valve seat assembly adjacent to the valve port to allow the valve-closure member to rotate between open and closed positions. One of the ferromagnetic portions is permanently magnetized. In one embodiment, the closure-member ferromagnetic portion is a flat plate which adheres to the top side of the resilient membrane portion. In an embellishment of this embodiment, the flat plate is annularly shaped with a central opening thereof being larger than the valve port. In a second embodiment, the closure-member ferromagnetic portion is comprised of small magnetic particles embedded or impregnated in the resilient membrane portion.
A pressure-actuated one-way flap-valve assembly for allowing fluid to flow in a first direction through a valve port but not in a second direction, said flap-valve assembly comprising: a valve-seat assembly for defining said valve port surrounded by a valve seat, said valve seat assembly including a ferromagnetic cylinder surrounding said valve port; and a valve-closure member being hingedly attached to said valveseat assembly adjacent to said valve port so as to be rotatable between a closed position flat against said valve seat and an open position rotated away from said valve seat, said valve closure member comprising a flat, resilient, membrane with freedom to flex and having a plurality of ferromagnetic particles embedded therein; wherein, one of said valve-seat ferromagnetic cylinder and said valve-closure-member ferromagnetic particles are permanently magnetized to cause a magnetic attraction therebetween for urging said flat resilient membrane portion toward said valve seat.
Claim 2
Dependent Claim
147 words
A pressure-actuated one-way flap-valve assembly for allowing fluid to flow in a first direction through a valve port but not in a second direction, said flap-valve assembly comprising: a valve-seat assembly for defining said valve port surrounded by a valve seat, said valve seat assembly including a ferromagnetic cylinder surrounding said valve port; and a valve-closure member being hingedly attached to said valveseat assembly adjacent to said valve port so as to be rotatable between a closed position flat against said valve seat and an open position rotated away from said valve seat, said valve closure member comprising a flat, resilient, membrane with freedom to flex and having a plurality of ferromagnetic particles embedded therein; wherein, one of said valve-seat ferromagnetic cylinder and said valve-closure-member ferromagnetic particles are permanently magnetized to cause a magnetic attraction therebetween for urging said flat resilient membrane portion toward said valve seat.
Claim 3
Dependent Claim
17 words
A pressure-actuated one-way flap-valve assembly as claimed in claim 1 wherein said ferromagnetic cylinder is permanently magnetized.
Claim 4
Dependent Claim
45 words
A pressure-actuated one-way flap-valve assembly as claimed in claim 1 wherein said flat, resilient, membrane includes a hinge portion which is attached to said valve seat assembly adjacent to said valve port to allow said valve-closure-member to rotate by flexing between open and closed positions.