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A gastight interface for an evacuation device includes a flexible suction cup adapted to form a gastight seal with a surface surrounding a valve disposed on a container and extending from an evacuation end of an evacuation chamber. The flexible suction cup has an aperture disposed therethrough for f

A gastight interface for an evacuation device includes a flexible suction cup adapted to form a gastight seal with a surface surrounding a valve disposed on a container and extending from an evacuation end of an evacuation chamber. The flexible suction cup has an aperture disposed therethrough for fluid communication with the evacuation chamber. A plurality of support members extends from the evacuation end of the evacuation chamber to restrict movement of the flexible suction cup between the surface and the evacuation end of the evacuation chamber, to allow fluid communication between an interior of the container and the evacuation chamber through the valve when the valve is in an open position, while the piston is being reciprocated between the closed end and the evacuation end. Each support member has a distal surface disposed outside of an outer perimeter of the flexible suction cup.

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1. A pump for evacuating gases, including air, from a container, the pump comprising: an evacuation chamber having a closed end and an evacuation end;a piston slidably disposed within the evacuation chamber and attached to a first end of a piston rod, the piston rod extending through an opening in t

1. A pump for evacuating gases, including air, from a container, the pump comprising: an evacuation chamber having a closed end and an evacuation end;a piston slidably disposed within the evacuation chamber and attached to a first end of a piston rod, the piston rod extending through an opening in the closed end of the evacuation chamber and a handle attached to a second end of the piston rod;a check valve disposed on the piston to allow gas to flow past the piston when the piston is reciprocated toward the evacuation end of the evacuation chamber;a flexible convex suction cup adapted to form a gastight seal by direct contact with a surface of the container, the flexible convex suction cup extending from the evacuation end of the evacuation chamber, and the flexible convex suction cup having an aperture disposed therethrough for fluid communication with the evacuation chamber; anda plurality of support members extending from the evacuation end of the evacuation chamber to restrict movement of the flexible convex suction cup between the surface and the evacuation end of the evacuation chamber to prevent a portion of the flexible convex suction cup from collapsing onto the surface while still maintaining a gastight seal with the surface, each support member having a distal surface disposed radially outside of an outer circumferential perimeter of a distal end of the flexible convex suction cup. 2. The pump of claim 1, wherein the check valve comprises a peripheral check valve. 3. The pump of claim 2, wherein the peripheral check valve comprises a sealing ring slidably disposed in a groove disposed centrally on a periphery of the piston, and a region of relief disposed on an internal peripheral edge of the piston, the region of relief having a base surface that has a smaller radius with respect to a center of the piston than a base surface of the groove. 4. The pump of claim 1, wherein the plurality of support members comprises three support members that extend from the evacuation end of the evacuation chamber. 5. The pump of claim 1, further comprising a restraint button extending from an inner surface of the flexible convex suction cup. 6. The pump of claim 1, wherein the closed end of the evacuation chamber is formed by a cap that attaches by a bayonet socket to the evacuation chamber at the closed end. 7. The pump of claim 1, wherein the plurality of support members is adjustably attached to the evacuation chamber so as to allow the plurality of support members to be adjusted relative to the evacuation chamber and to move the distal surfaces thereof toward or away from the evacuation end. 8. The pump of claim 7, wherein the plurality of support members is adjustably attached to the evacuation chamber by a threaded attachment. 9. The pump of claim 7, wherein the plurality of support members is adjustably attached to the evacuation chamber by a bayonet socket attachment. 10. The pump of claim 1, wherein the outer perimeter of the flexible convex suction cup is substantially circular in shape. 11. A gastight interface for an evacuation device, the gastight interface comprising: a flexible convex suction cup adapted to form a gastight seal by direct contact with a surface surrounding a valve disposed on a container, the flexible convex suction cup extending from an evacuation end of an evacuation chamber, and the flexible convex suction cup having an aperture disposed therethrough for fluid communication with the evacuation chamber; anda plurality of support members extending from the evacuation end of the evacuation chamber to restrict movement of the flexible convex suction cup between the surface and the evacuation end of the evacuation chamber to allow fluid communication between an interior of the container and the evacuation chamber through the valve when the valve is in an open position, while the piston is being reciprocated from the evacuation end toward the closed end, each support member having a distal surface disposed outside of an outer perimeter of the flexible convex suction cup. 12. The gastight interface of claim 11, further comprising a plurality of restraint buttons extending from an inner surface of the flexible convex suction cup. 13. The gastight interface of claim 11, wherein the plurality of support members is adjustably attached to the evacuation chamber so as to allow the plurality of support members to be adjusted relative to the evacuation chamber and to move the distal surfaces thereof toward or away from the evacuation end. 14. The gastight interface of claim 11, wherein the outer perimeter of the flexible convex suction cup is substantially circular in shape. 15. A pump for evacuating gases, including air, from a container, the pump comprising: an evacuation chamber having a closed end and an evacuation end;a piston slidably disposed within the evacuation chamber and attached to a first end of a piston rod, the piston rod extending through an opening in the closed end of the evacuation chamber and a handle attached to a second end of the piston rod;a check valve disposed on the piston to allow gas to flow past the piston when the piston is reciprocated toward the evacuation end of the evacuation chamber;a flexible suction cup adapted to form a gastight seal with a surface and extending from the evacuation end of the evacuation chamber, the flexible suction cup having an aperture disposed therethrough for fluid communication with the evacuation chamber; anda plurality of support members extending from the evacuation end of the evacuation chamber to restrict movement of the flexible suction cup between the surface and the evacuation end of the evacuation chamber to prevent a portion of the flexible suction cup from collapsing onto the surface while still maintaining a gastight seal with the surface, each support member having a distal surface disposed radially outside of an outer circumferential perimeter of a distal end of the flexible suction cup,wherein the plurality of support members defines an intermittent footprint surrounding the flexible suction cup.