Detector of bubbles in blood
First Claim
1. In a device for detecting the presence of a gaseous fluid in relation to a predetermined level of liquid in a portion of a deformable and elastic vessel;
- the improvement comprising;
(a) a hollow body defining a compartment capable of accommodating said portion of said vessel disposed in relation to said predetermined level;
(b) transmitter transducer means for emitting a predetermined signal;
(c) receiver transducer means for receiving said predetermined signal emitted by the transmitter means, said transmitter and receiver transducer means being fixed to said hollow body in diametrically opposite positions facing each other, and facing said compartment;
said receiver transducer means being capable of cooperating with the said transmitter transducer and of emitting an output signal responsive to the quantity of the gaseous fluid interposed between said transducer means;
(d) movable means to said hollow body and adapted to bear against said portion of the vessel; and
(e) resilient biasing means connecting said movable means to said hollow body and capable of biasing said movable means to transmit a radial thrust against said portion of the vessel to create a deformation of the vessel portion and intimate contact between it and the transmitter and receiver transducer means without air entrapment therebetween.
3 Assignments
0 Petitions
Accused Products
Abstract
A device for detecting the presence of a gaseous fluid in relation to a predetermined level of liquid in an elastically deformable vessel comprises a U-shaped body capable of accommodating within it a portion of the vessel at a predetermined liquid level. A pair of piezoelectric transducers in the body, used as transmitter and receiver, is fixed face-to-face on opposite arms of the U-shaped body. The device moreover comprises a cover capable of confining the portion of the vessel inside the U-shaped body, and an elastic device disposed between the cover and the U-shaped body and capable of producing an elastic deformation of the vessel and causing the contact surfaces of transducers to contact intimately the said portion of the vessel without entrapment of air.
52 Citations
19 Claims
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1. In a device for detecting the presence of a gaseous fluid in relation to a predetermined level of liquid in a portion of a deformable and elastic vessel;
- the improvement comprising;
(a) a hollow body defining a compartment capable of accommodating said portion of said vessel disposed in relation to said predetermined level; (b) transmitter transducer means for emitting a predetermined signal; (c) receiver transducer means for receiving said predetermined signal emitted by the transmitter means, said transmitter and receiver transducer means being fixed to said hollow body in diametrically opposite positions facing each other, and facing said compartment;
said receiver transducer means being capable of cooperating with the said transmitter transducer and of emitting an output signal responsive to the quantity of the gaseous fluid interposed between said transducer means;(d) movable means to said hollow body and adapted to bear against said portion of the vessel; and (e) resilient biasing means connecting said movable means to said hollow body and capable of biasing said movable means to transmit a radial thrust against said portion of the vessel to create a deformation of the vessel portion and intimate contact between it and the transmitter and receiver transducer means without air entrapment therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- the improvement comprising;
Specification