Improved needle-less parenteral fluid injector
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United States of America Patent
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Jul 7, 1992
Issued Date -
N/A
app pub date -
Apr 2, 1990
filing date -
Aug 11, 1988
priority date (Note) -
Expired
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Abstract
A fluid injector for use with a needle-less syringe or needle-less add-on IV line is disclosed. The injector is connected to a main IV line and has a fluid passageway from the syringe or the add-on IV set to the main IV line. The injector comprises an anti-backflow valve member where the member is movable under fluid pressure along between a first position where the fluid cannot flow through the injector and a second position where the fluid can flow through the injector. The member is a sinking type and has a specific gravity greater than 1.0. The injector also comprises a valve located near the syringe end of the injector for receiving the fluid from the syringe or the add-on IV line for injection into the main IV line and for automatically preventing air embolus entering into the IV line. The anti-air embolus valve comprises a piston in a conduit. The piston is movable between a first position and a second position. The piston has a central bore for the passage of the fluid, a capped end and an inlet end. An envelope surrounds the piston and is interior to the conduit, between the capped end and the inlet end. The anti-air embolus valve also has a stainless steel spring, surrounding the piston in the envelope to maintain the piston in the first position, where fluid and air cannot flow. An o-ring surrounds the piston at the capped end and forms a seal to prevent air and fliud flow through the injector in the first position.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Loo, George D H | 9814 Curwood Pl., Beverly Hills, CA 90210 | 3 | 148 |
Wong, Gordon A | 118 Northlite Cir., Sacramento, CA 95831 | 5 | 671 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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