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US 2010/0215519 A1Published application
Air operated double diaphragm over center valve pump
AssigneeIDEX AODD, Inc.
InventorsLarry Francis Krebs, Craig Daniel Sunada, Mark Edward Connell
Life of this patent
Estimating the term…
Abstract
An air operated double diaphragm pump comprising an air valve mechanism. The air valve mechanism may comprise a single valve system that replaces the two valve system found in conventional air operated double diaphragm pumps. The position of the valve may be determined by the diaphragm motion of the pump up to a stall position. A spring-loaded mechanical actuation may complete the valve action from the stall position to the final or end of stroke position of the pump.
Claims15
A pump comprising:
- a first diaphragm chamber comprising a first diaphragm assembly, wherein the first diaphragm assembly defines a first pumping chamber and a first fluid chamber within the first diaphragm chamber;
- a second diaphragm chamber comprising a second diaphragm assembly, wherein the second diaphragm assembly defines a second pumping chamber and a second fluid chamber within the second diaphragm chamber;
- a connecting rod connected between the first diaphragm assembly and the second diaphragm assembly to at least partially cause the first diaphragm assembly and the second diaphragm assembly to reciprocate between a first pump position and a second pump position;
- and,
- an air valve mechanism comprising:
- a valve plate comprising at least a first aperture suitable for allowing the passage of compressed air through the valve plate;
- a valve block, wherein the valve block moves over at least a portion of the valve plate between a first block position and a second block position to cause a compressed fluid to be introduced into the first fluid chamber or the second fluid chamber and the movement of the first diaphragm assembly and the second diaphragm assembly between the first pump position and the second pump position at least partially causes the valve block to move between the first block position and the second block position;
- a swing arm assembly, wherein the swing arm assembly urges the valve block away from a stall position and towards the first block position or the second block position.
5 more elements
An air valve mechanism comprising:
- a housing;
- a valve block;
- a valve plate;
- and,
- a swing arm assembly,
- wherein the housing allows at least a portion of the air valve mechanism to be removably connected to an associated pump,
- wherein the valve block, the valve plate, and the swing arm assembly are positioned substantially within the housing,
- wherein the valve plate comprises a first aperture, a second aperture, and a third aperture suitable for allowing the passage of a compressed fluid through the valve plate,
- wherein the valve block is positioned to move between a first block position that causes the first aperture to be in fluid communication with the second aperture and a second block position that causes the second aperture to be in fluid communication with the third aperture,
- wherein the movement of the valve block between the first block position and the second block position is at least partially caused by the movement of a first diaphragm assembly and a second diaphragm assembly of the associated pump,
- wherein the swing arm assembly provides a mechanical actuation that at least partially causes the valve block to move from a third block position that coincides with a stall position of the associated pump to the first or second block position.
8 more elements
A method comprising the steps of:
- (a) providing a pump comprising:
- a first diaphragm chamber comprising a first diaphragm assembly, wherein the first diaphragm assembly defines a first pumping chamber and a first fluid chamber within the first diaphragm chamber;
- a second diaphragm chamber comprising a second diaphragm assembly, wherein the second diaphragm assembly defines a second pumping chamber and a second fluid chamber within the second diaphragm chamber;
- a connecting rod connected between the first diaphragm assembly and the second diaphragm assembly to at least partially cause the first diaphragm assembly and the second diaphragm assembly to reciprocate between a first pump position and a second pump position;
- and,
- an air valve mechanism comprising:
- a valve plate comprising at least a first aperture suitable for allowing the passage of compressed air through the valve plate;
- a valve block, wherein the valve block moves over at least a portion of the valve plate between a first block position and a second block position to cause a compressed fluid to be introduced into the first fluid chamber or the second fluid chamber and the movement of the first diaphragm assembly and the second diaphragm assembly between the first pump position and the second pump position at least partially causes the valve block to move between the first block position and the second block position;
- a swing arm assembly, wherein the swing arm assembly urges the valve block away from a stall position and towards the first block position or the second block position;
- and,
- a housing, wherein at least a portion of the air valve mechanism is positioned within the housing and the housing is removably connected to the pump;
- (b) operating the pump for a first period of time;
- (c) removing the housing and the at least a portion of the air valve mechanism that is positioned within the housing to provide in-line service to the air valve mechanism;
- (d) connecting the housing to the pump;
- and,
- (e) operating the pump for a second period of time.
13 more elements
Dependencies are inferred from the claim text.