Cassette loading and latching apparatus for a medication infusion system
First Claim
1. A system for facilitating the installation of a disposable cassette comprising a pump with a reciprocating piston onto a main unit in a medication infusion system or the like, comprising:
- latch means on said disposable cassette for locking said disposable cassette in the proper position on said main unit, said latch means being movable between a first unlatched position and a second latched position;
means on said main unit for engaging said latch means on said disposable cassette when said cassette is placed in the proper position on said main unit, said engaging means on said main unit being engaged by moving said latch means from said first unlatched position to said second latched position;
means located on said main unit for receiving and driving said piston of said pump, said receiving and driving means having a first open position for receiving said piston when said disposable cassette is installed onto said main unit and a second closed position for engaging said piston with said receiving and driving means; and
interlocking means for moving said receiving and driving means from said first open position to said second closed position when said latch means is moved from said first unlocked position to said second locked position with said disposable cassette installed onto said main unit.
16 Assignments
0 Petitions
Accused Products
Abstract
A medication infusion system having a disposable cassette including a piston pump and active valves for installation on a main pump unit including a mechanical drive system for operating the cassette is disclosed which has a unique system for loading the cassette onto the main pump unit and latching the cassette in place on the main pump unit. The cassette includes a slide latch which closes the fluid path when the cassette is to be installed, the slide latch only being opened when the cassette is properly installed on the main pump unit with the valve actuators of the main pump unit preventing fluid freeflow. Latching the cassette in place causes a latch head on the main pump unit to grasp the piston on the cassette in a driving relationship.
148 Citations
20 Claims
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1. A system for facilitating the installation of a disposable cassette comprising a pump with a reciprocating piston onto a main unit in a medication infusion system or the like, comprising:
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latch means on said disposable cassette for locking said disposable cassette in the proper position on said main unit, said latch means being movable between a first unlatched position and a second latched position; means on said main unit for engaging said latch means on said disposable cassette when said cassette is placed in the proper position on said main unit, said engaging means on said main unit being engaged by moving said latch means from said first unlatched position to said second latched position; means located on said main unit for receiving and driving said piston of said pump, said receiving and driving means having a first open position for receiving said piston when said disposable cassette is installed onto said main unit and a second closed position for engaging said piston with said receiving and driving means; and interlocking means for moving said receiving and driving means from said first open position to said second closed position when said latch means is moved from said first unlocked position to said second locked position with said disposable cassette installed onto said main unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for facilitating the installation of a disposable cassette comprising a pump with a reciprocating piston onto a main unit in a medication infusion system or the like, comprising:
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means for guiding said disposable cassette into the proper position on said main unit; latch means slideably mounted on said disposable cassette for locking said disposable cassette in the proper position on said main unit, said latch means being movable between a first unlatched position and a second latched position; means for receiving said latch means to lock said disposable cassette in position on said main unit, said receiving means being located on said main unit, said disposable cassette being installed onto said main unit in the proper position with said latch means in said first unlatched position, said latch being moved from said first unlatched position to said a second latched position to engage said latch means with said receiving means, thereby locking said disposable cassette in position on said main unit, said latch means being movable from said second latched position to said first unlatched position to disengage said latch means from said receiving means; a latch head having jaws adapted to receive and engage said piston of said pump, said latch head being located on said main unit, said latch head having a first open position and a second closed position, said disposable cassette being installed onto said main unit in the proper position with said latch head in said first open position, said latch head then being moved from said first open position to said second closed position to engage said piston with said latch head; and interlocking means for driving said latch means head from said first open position to said second closed position whenever said latch is moved from said first unlocked position to said second locked position with said disposable cassette installed onto said main unit in the proper position, said interlocking means also for driving said latch means head from said second closed position to said first open position whenever said latch is moved from said second locked position to said first unlocked position with said disposable cassette installed onto said main unit in the proper position.
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19. A system for facilitating the installation of a disposable cassette comprising a pump with a reciprocating piston onto a main unit in a medication infusion system or the like, comprising:
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means for guiding said disposable cassette into the proper position on said main unit; latch means on said disposable cassette for locking said disposable cassette in the proper position on said main unit, said latch means being movable between a first unlatched position and a second latched position; means for receiving said latch means in a locked relationship, said receiving means being located on said main unit, said disposable cassette being installed onto said main unit in the proper position with said latch means in said first unlatched position, said latch means being moved from said first unlatched position to said a second latched position to engage said latch means with said receiving means, thereby locking said disposable cassette in position on said main unit; means located on said main unit for receiving and driving said piston of said pump, said receiving and driving means having a first open position and a second closed position, said disposable cassette being installed onto said main unit in the proper position with said receiving and driving means in said first open position, said receiving and driving means then being moved from said open position to said second closed position to engage said piston with said receiving and driving means; and interlocking means for driving said receiving and driving means from said first open position to said second closed position whenever said latch means is moved from said first unlocked position to said second locked position with said disposable cassette installed onto said main unit in the proper position, said interlocking means also for driving said receiving and driving means from said second closed position to said first open position whenever said latch means is moved from said second locked position to said first unlocked position with said disposable cassette installed onto said main unit in the proper position.
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20. A method of installing a disposable cassette comprising a pump with a reciprocating piston onto a main unit in a medication infusion system or the like, comprising:
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guiding said disposable cassette into the proper position on said main unit; locking said disposable cassette in the proper position on said main unit by moving a latch means on said disposable cassette between a first unlatched position and a second latched position, said latch means in said second latched position engaging a receiving means being located on said main unit; engaging said piston of said pump with means located on said main unit for driving said piston, said means for driving said piston having a first open position and a second closed position, said disposable cassette being installed onto said main unit in the proper position with said means for driving said piston in said first open position; and moving said means for driving said piston from said first open position to said second closed position to engage said piston when said latch means is moved from said first unlocked position to said second locked position with said disposable cassette installed onto said main unit in the proper position, and also moving means for driving said piston from said second closed position to said first open position to disengage said piston when said latch means is moved from said second locked position to said first unlocked position with said disposable cassette installed onto said main unit in the proper position.
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Specification