Magnetically operated check valve
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsBrian G. Morris, Richard J. Bozeman, Jr.
Life of this patent
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Abstract
A magnetically operated check valve is disclosed having, in one aspect, a valve body and a movable poppet disposed therein, a magnet attracting the poppet to hold the valve shut until the force of fluid flow through the valve overcomes the magnetic attraction and moves the poppet to an unseated, open position; the poppet and magnet configured and disposed to trap magnetically attracted particulate and prevent it from flowing to a valve seating region.
Claims7
A magnetically operated check valve comprising
- a valve body,
- an inlet fitting removably secured in the valve body,
- a poppet movably disposed in a poppet cavity in the valve body, the poppet having a magnetically attractive portion,
- an outlet fitting removably secured in the valve body,
- at least one magnet mounted in the inlet fitting and having magnetic attractive force for attracting the magnetically attractive portion of the poppet to hold the valve closed to fluid flow until force of fluid against the poppet exceeds the magnetic attractive force and moves the poppet to open fluid flow through the valve,
- the valve having a seating region wherein an o-ring seals against the poppet and seals against a sealing shoulder of the inlet fitting to close off flow through the valve,
- wherein the seating region is spaced apart from the magnet and wherein said magnetically attractive portion of said poppet is a magnet mounted to the poppet for magnetically attracting the poppet to the at least one magnet mounted in the inlet fitting.
A magnetically operated check valve comprising
- a valve body,
- an inlet fitting removably secured in the valve body,
- a poppet movably disposed in a poppet cavity in the valve body, the poppet having a magnetically attractive portion,
- an outlet fitting removably secured in the valve body,
- at least one magnet mounted in the inlet fitting and having magnetic attractive force for attracting the magnetically attractive portion of the poppet to hold the valve closed to fluid flow until force of fluid against the poppet exceeds the magnetic attractive force and moves the poppet to open fluid flow through the valve,
- the valve having a seating region wherein an o-ring seals against the poppet and seals against a sealing shoulder of the inlet fitting to close off flow through the valve,
- wherein the seating region is spaced apart from the magnet, the poppet is moveable to contact the sealing O-ring and close off fluid flow through the valve prior to contact between a leading edge of the poppet and a sealing shoulder on the inlet fitting, and wherein the poppet's leading edge has an inclined portion which contacts and moves the sealing O-ring into a position to effectively seal off fluid flow through the valve while inhibiting distortion of the sealing O-ring.
Dependencies are inferred from the claim text.