Pump with door-mounted mechanism for positioning tubing in the pump housing
First Claim
1. A pump comprising:
- (1) a housing containing a sensor assembly defining a slot for receiving tubing through which fluid is pumped;
(2) a door pivotally mounted to said housing on a first axis to swing between (i) a closed position covering said slot, and (ii) an open position spaced away from said slot; and
(3) an engaging member for pushing said tubing in said slot, said engaging member pivotally mounted to said door for rotation about a second axis, said engaging member having a ram for contacting said tubing whereby the orientation of said ram relative to said door can change as said ram enters said slot when said door closes.
3 Assignments
0 Petitions
Accused Products
Abstract
A peristaltic pump is provided with a housing, a pump head in the housing, and a receiving path defined along a housing and pump head for receiving tubing. An air sensor assembly in the pump has a slot for receiving a section of the tubing in the receiving path. A position covering the receiving path and an open position exposing the receiving path. An engaging member is provided for pushing the tubing in the slot. The engaging member is pivotally mounted to the door for rotation about an axis parallel to the door pivot axis. The engaging member has a ram for contacting the tubing. The orientation of the ram relative to the door can change as the ram enters the slot when the door closes so that the tubing is pushed relatively evenly and along a substantially straight line into the slot.
44 Citations
27 Claims
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1. A pump comprising:
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(1) a housing containing a sensor assembly defining a slot for receiving tubing through which fluid is pumped; (2) a door pivotally mounted to said housing on a first axis to swing between (i) a closed position covering said slot, and (ii) an open position spaced away from said slot; and (3) an engaging member for pushing said tubing in said slot, said engaging member pivotally mounted to said door for rotation about a second axis, said engaging member having a ram for contacting said tubing whereby the orientation of said ram relative to said door can change as said ram enters said slot when said door closes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pump comprising:
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(1) a housing in which is mounted a sensor assembly having two, spaced-apart, parallel walls defining a slot for receiving tubing through which fluid is pumped; (2) a door pivotally mounted to said housing on a first axis parallel to said slot to swing between (i) a closed position covering said slot, and (ii) an open position spaced away from said slot; (3) an engaging member for pushing said tubing in said slot, said engaging member pivotally mounted to said door for rotation about a second axis parallel to said first axis, said engaging member having (i) a ram for entering said slot and engaging said tubing, and (ii) a cam follower, said housing defining a cam surface; and (4) a spring acting between said engaging member and door for biasing said engaging member to pivot about said second axis relative to said door to urge said cam follower against said cam surface as said door is moved to said closed position whereby said ram is oriented to enter said slot along a path of motion which is generally parallel to said slot walls. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A pump comprising:
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(1) a housing defining a slot for receiving tubing through which fluid is pumped; (2) a door pivotally mounted to said housing to pivot between a closed position covering said slot and an open position away from said slot; and (3) pusher means pivotally mounted to said door for pushing said tubing in said slot. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification