Fluid delivery device identification and loading system
First Claim
Patent Images
1. A medical pump for use with a cassette, comprising:
- a chassis having a fixed seat thereon;
a carriage connected to the chassis and having an opening therein adapted to receive a cassette, the opening forming a footing which restricts movement of the cassette within the carriage, the carriage being movable inwardly with respect to the chassis from an open position wherein the carriage is spaced from the fixed seat to a closed position to engage the cassette to the fixed seat; and
an actuator assembly connected to the carriage having a cam element having a cam surface that is engaged by a cam follower such that as the cam follower moves along the cam surface the carriage moves between the closed position and the opened position;
wherein the cam follower is rotatably connected to a handle via a lever bearing;
wherein the lever bearing has a radial opening and a spoke and the handle has an engagement member disposed through the radial opening wherein in a first position the engagement member does not contact the spoke and in a second position when the handle is rotated the engagement member engages the spoke to rotate the lever bearing and cam follower.
3 Assignments
0 Petitions
Accused Products
Abstract
A medical pump includes a chassis having a fixed seat and a carriage having a footing for receiving a fluid delivery device and restricting its movement. An actuator assembly is provided that allows for moving the carriage between an opened and closed position to engage the fluid delivery device to the seat. A rack and pinion system is utilized in combination with a cam element and spring element to provide a bi-stable actuator assembly that urges the carriage into a fully opened position or a fully closed position and will not allow the carriage to dwell in an intermediate position if external force is withdrawn.
-
Citations
12 Claims
-
1. A medical pump for use with a cassette, comprising:
-
a chassis having a fixed seat thereon; a carriage connected to the chassis and having an opening therein adapted to receive a cassette, the opening forming a footing which restricts movement of the cassette within the carriage, the carriage being movable inwardly with respect to the chassis from an open position wherein the carriage is spaced from the fixed seat to a closed position to engage the cassette to the fixed seat; and an actuator assembly connected to the carriage having a cam element having a cam surface that is engaged by a cam follower such that as the cam follower moves along the cam surface the carriage moves between the closed position and the opened position; wherein the cam follower is rotatably connected to a handle via a lever bearing; wherein the lever bearing has a radial opening and a spoke and the handle has an engagement member disposed through the radial opening wherein in a first position the engagement member does not contact the spoke and in a second position when the handle is rotated the engagement member engages the spoke to rotate the lever bearing and cam follower. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A medical pump for use with a cassette, comprising:
-
a chassis having a fixed seat thereon; a carriage connected to the chassis and having an opening therein adapted to receive a cassette, the opening forming a footing which restricts movement of the cassette within the carriage, the carriage being movable inwardly with respect to the chassis from an open position wherein the carriage is spaced from the fixed seat to a closed position to engage the cassette to the fixed seat; and an actuator assembly comprising a rack engaged by a pinion assembly having a cam follower such that as the pinion assembly rotates along the rack the carriage moves between the closed position and the open position; wherein the cam follower is rotatably connected to a handle via a lever bearing; wherein the lever bearing has a radial opening and a spoke and the handle has an engagement member disposed through the radial opening wherein in a first position the engagement member does not contact the spoke and in a second position when the handle is rotated the engagement member engages the spoke to rotate the lever bearing and cam follower.
-
-
12. A medical pump for use with a cassette, comprising:
-
a chassis having a fixed seat thereon; a carriage connected to the chassis and having an opening therein adapted to receive a cassette, the opening forming a footing which restricts movement of the cassette within the carriage, the carriage being movable inwardly with respect to the chassis from an open position wherein the carriage is spaced from the fixed seat to a closed position to engage the cassette to the fixed seat; and a bi-stable actuator assembly having a cam follower connected to the carriage that resists movement of the carriage at the open and closed positions and prevents external force initiated movement of the main carriage from being stopped at an intermediate position between the open and closed positions when external force is withdrawn; wherein the cam follower is rotatably connected to a handle via a lever bearing; wherein the lever bearing has a radial opening and a spoke and the handle has an engagement member disposed through the radial opening wherein in a first position the engagement member does not contact the spoke and in a second position when the handle is rotated the engagement member engages the spoke to rotate the lever bearing and cam follower.
-
Specification