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US 5,687,882 AGranted
Flexible dispenser with bladder
AssigneeContainaire, Inc.
InventorJohn J. Mueller
Life of this patent
Estimating the term…
Abstract
A dispenser for fluid material includes a flexible container. A piston is adapted for movement within the container. An expansible bladder is connected to the piston. A first flow restrictor allows flow of displacement fluid only from outside the container into the interior of the bladder. A second flow restrictor allows flow of material only from within an interior portion of the container external to the bladder to outside the container. The container also preferably includes a rod supported in the container, the piston being movable on the rod. In another embodiment the bladder is connected to a collar movable on the rod.
Claims31
A dispenser for a fluid material, comprising
- a flexible container,
- a piston comprised of a material that enables the piston to be flexed, said piston being movable within the container,
- an expansible bladder connected to said piston,
- first flow restricting means for allowing flow of a displacement fluid only from outside the container into the interior of said bladder, and
- second flow restricting means for allowing flow of material only from within an interior portion of the container external to said bladder to outside the container.
2 more elements
A dispenser for a fluid material, comprising
- a flexible container,
- a piston comprised of a material that enables the piston to be flexed, said piston being movable within the container,
- an expansible bladder connected to said piston,
- a first passageway into the container and communicating with the interior of said bladder,
- a first check valve cooperating with said first passageway and allowing flow of a displacement fluid only from outside the container into the interior of said bladder, and
- a second check valve allowing flow of material only from within an interior portion of the container external to said bladder to outside the container.
3 more elements
A dispenser for a fluid material, comprising
- a flexible, resilient container having a dispensing end and an opposite end,
- a bladder within the container attached at the opposite end and of a shape and size to substantially fill the container when the bladder is fully inflated,
- a check valve at the dispensing end that allows outflow of contents when the container is squeezed and prevents inflow of displacement fluid when the container returns to its original volume,
- an inlet passage to the bladder,
- a check valve allowing displacement fluid to enter the bladder from outside the container through the inlet passage and preventing displacement fluid from exiting the bladder, and
- a piston movable within the container from the opposite end toward the dispensing end, the piston being comprised of a material that enables the piston to be flexed, and the piston essentially obstructing the cross-section of the container,
- whereby flow of the contents of the container is obstructed in a direction from the dispensing end toward the opposite end of the container.
4 more elements
A dispenser for a fluid material, comprising
- a flexible, resilient container having a dispensing end and an opposite end,
- a rod supported in the container,
- a collar movable on said rod, said collar being in direct frictional and sealing engagement with said rod,
- a bladder within the container attached at the opposite end and to said collar, said bladder having a shape and size to substantially fill the container when the bladder is fully inflated,
- first flow restricting means for allowing flow of displacement fluid only from outside the container into the interior of said bladder, and
- second flow restricting means for allowing flow of material only from within an interior portion of the container external to said bladder to outside the container.
3 more elements
A dispenser for a fluid material, comprising
- a flexible container having a dispensing end portion and another end portion,
- a piston adapted for movement within the container,
- an expansible bladder connected to said piston,
- first flow restricting means for allowing flow of displacement fluid only from outside the container into the interior of said bladder, said first flow restricting means comprising a passageway into the container communicating with the interior of said bladder, said passageway including a tube connected to the container at said dispensing end portion and a check valve cooperating with said tube, said piston being movable on said tube, and
- second flow restricting means for allowing flow of material only from within an interior portion of the container external to said bladder to outside the container.
2 more elements
A dispenser for a fluid material, comprising
- a flexible, resilient container having a dispensing end and an opposite end,
- an elongated guide supported in the container,
- a bladder within the container attached at the opposite end and having a shape and size to substantially fill the container when the bladder is fully inflated,
- means cooperable with the guide for resisting movement of the bladder toward the dispensing end, said means cooperable with the guide being in direct frictional and sealing engagement with the guide,
- first flow restricting means for allowing flow of displacement fluid only from outside the container into the interior of said bladder, and
- second flow restricting means for allowing flow of material only from within an interior portion of the container external to said bladder to outside the container.
3 more elements
Dependencies are inferred from the claim text.