Fluid sampling devices
First Claim
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1. Fluid sampling apparatus comprising:
- (a) a syringe having cylinder and plunger elements, there being a cam follower on one of said elements,(b) the syringe having an opening to pass fluid between the cylinder exterior and interior,(c) a cam having a riser engaging said follower, and(d) means to effect relative motion between the syringe and cam to in turn cause the cam riser to displace the follower whereby the plunger and cylinder are relatively displaced for displacing fluid through said opening.
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Abstract
Fluid sampling apparatus employs one or more syringes having cylinder and plunger elements. A cam cooperates with a follower on one of such elements of each syringe, in response to rotation motion between the syringe and cam, to displace the follower for relatively displacing the plunger and cylinder thereby to displace fluid through an opening associated with each cylinder. Blocking structure blocks the opening when the follower is not being displaced by the cam.
13 Citations
10 Claims
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1. Fluid sampling apparatus comprising:
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(a) a syringe having cylinder and plunger elements, there being a cam follower on one of said elements, (b) the syringe having an opening to pass fluid between the cylinder exterior and interior, (c) a cam having a riser engaging said follower, and (d) means to effect relative motion between the syringe and cam to in turn cause the cam riser to displace the follower whereby the plunger and cylinder are relatively displaced for displacing fluid through said opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification