Air pump with pressure indication
AssigneeAirtender Works B.V.
InventorsEelco Jan Gerardus Witteveen, Robert Franciscus Van Der Hulst, Rui Medeiros Santos, Dalibor Borjanin
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Abstract
A manually operable pump for cooperation with a container to reduce pressure inside the container; the pump comprising, a cylinder having a lower end for cooperation with the container, a piston movable inside the cylinder, a closure element arranged around a lower end of the piston, wherein the closure element comprises a bottom and a wall surrounding the lower end of the piston, wherein the bottom is adaptable between a rest position wherein a pressure difference over the bottom is lower than a predefined threshold and an indicator position when the pressure difference equals or exceeds the predefined threshold.
Claims29
A manually operable pump for cooperation with a container to reduce pressure inside the container;
- the pump comprising:
- a cylinder having a lower end for cooperation with the container;
- a piston movable inside the cylinder;
- and
- a closure element arranged around a lower end of the piston, wherein the closure element comprises a bottom and a wall surrounding the lower end of the piston, wherein the bottom is adaptable between a rest position when a pressure difference over the bottom is lower than a predefined threshold and an indicator position when the pressure difference equals or exceeds the predefined threshold.
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Dependencies are inferred from the claim text.