Automatically calibrating vacuum relief safety valve

• US 20050092946A1
• Filed: 11/03/2004
• Published: 05/05/2005
• Est. Priority Date: 11/04/2003
• Status: Abandoned Application

• Current Assignee: Vac-Alert IP Holdings LLC (Vac-Alert IP Holding)
• Original Assignee: Vac-Alert IP Holdings LLC (Vac-Alert IP Holding)
• Inventors: Pennington, Paul, Fellington, George, Ruschell, Marwood
• Application Number:
  US10/980,031
• Publication Number:
  US 20050092946A1
• Time in Patent Office: Days
• US Class Current: 251/48
• CPC Class Codes: F16K 24/04 for venting only F16K24/02 takes precedence

Abstract

An automatically calibrating vacuum relief safety valve is disclosed including a valve body having a plurality of inner cavities, wherein a first cavity of said plurality of inner cavities is in constant fluid communication with air external to said valve body and wherein a second cavity of said plurality of cavities is in intermittent fluid communication with said first cavity, at least one air vent opening positioned between said first cavity and said second cavity and operatively engaged to a releasable seal, said releasable seal connected to a piston member, and a check valve in fluid communication with said second cavity and the suction side of a pump.

Claims

1. An automatically calibrating vacuum relief safety valve, comprising:

a valve body having a plurality of inner cavities, wherein a first cavity of said plurality of inner cavities is in constant fluid communication with air external to said valve body and wherein a second cavity of said plurality of cavities is in intermittent fluid communication with said first cavity;

at least one air vent opening positioned between said first cavity and said second cavity and operatively engaged to a seal, said seal releasable connected to a piston member; and

a check valve in fluid communication with said second cavity and a suction side of a pump.

2. The automatically calibrating vacuum relief safety valve of claim 1 wherein said second cavity is in intermittent fluid communication with said first cavity by said at least one air vent opening.

3. The automatically calibrating vacuum relief safety valve of claim 1 wherein said piston member is operatively engaged to a diaphragm.

4. The automatically calibrating vacuum relief safety valve of claim 1 wherein said piston member is operatively engaged to a second piston.

5. The automatically calibrating vacuum relief safety valve of claim 3 wherein said diaphragm is movable.

6. The automatically calibrating vacuum relief safety valve of claim 5 wherein said piston member moves in connection with said diaphragm.

7. The automatically calibrating vacuum relief safety valve of claim 6 wherein said piston member is operatively engaged to a plunger and plunger shaft of dash pot.

8. The automatically calibrating vacuum relief safety valve of claim 7 wherein said piston member returns to a resting state when said diaphragm returns to a resting state.

9. The automatically calibrating vacuum relief safety valve of claim 8 wherein said piston member returns to said resting state at a variable speed.

10. The automatically calibrating vacuum relief safety valve of claim 9 wherein said variable speed is determined by a bleed valve adjustment knob.

11. The automatically calibrating vacuum relief safety valve of claim 10 wherein said bleed valve adjustment knob adjusts the speed of said plunger to a resting state.

12. An automatically calibrating vacuum relief safety valve, comprising:

a valve body having a plurality of inner cavities, wherein a first cavity and a third cavity of said plurality of inner cavities is in constant fluid communication with air external to said valve body and wherein a second cavity of said plurality of cavities is in intermittent fluid communication with said first cavity;

at least one air vent opening positioned between said first cavity and said second cavity and operatively engaged to a seal, said seal releasable connected to a piston member;

a movable diaphragm operatively engaged to said piston and positioned between said second cavity and said third cavity, said piston further operatively engaged to a movable plunger and plunger shaft of dash pot; and

a check valve in fluid communication with said second cavity and a suction side of a pump.