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Single use syringe with impulse reduction system
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A technology of syringes and syringes, applied in the direction of hypodermic injection devices, etc., which can solve the problem of contaminated fluid or blood spreading
Active Publication Date: 2008-10-15
BECTON DICKINSON & CO
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Such spraying creates a risk of spreading contaminated fluid or blood
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[0021] Before describing several example embodiments of the present invention, it is to be understood that the present invention is not limited to the details of construction or process presented in the following description and drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways.
[0022] The convention used in this application is that the term "proximal" refers to the direction closest to the practitioner, while the term "distal" refers to the direction farthest from the practitioner.
[0023] According to one embodiment of the invention depicted in FIGS. 1 and 2 , syringe 10 includes a syringe barrel 20 having an inner surface 26 defining a fluid chamber 18, a distal end, and a breakable or retractable plunger rod 30. 12, proximal end 14, distal tip 16. A retractable plunger rod 30 may be slidably disposed within barrel 20 . The plunger rod 30 includes a distal portion 34 , a proximal portion 36 and a stopper 38 co...
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Abstract
A syringe including a plunger rod assembly including a proximal portion (36) a distal portion (34) with a stopper (38) for expelling fluids from the syringe and a breakable connection between the proximal portion and the distal portion is disclosed. An impulse reduction system (50) , which may be an elastic element or braking surfaces, reduces the contact impulse imparted by the proximal portion upon the distal portion when the connection between the distal portion and proximal portion breaks is also disclosed.
Description
[0001] Cross References to Related Applications [0001] This application is a continuation-in-part of U.S. Patent Application Serial No. 10 / 835,848 filed April 30, 2004, the now abandoned U.S. Patent Application Serial No. 10 / 835,848 filed September 27, 2002 Continuation-in-Part of Application No. 10 / 256,607 and Continuation-in-Part of U.S. Patent Application No. 10 / 706,795 filed November 12, 2003, which is now abandoned August 28, 2001 continuation of U.S. Patent Application No. 09 / 941,030, filed March 23, 1999, of U.S. Patent Application No. 09 / 274,117, now U.S. Patent No. 6,361,525 Continuation, U.S. Patent No. 6,361,525 is a continuation-in-part of now-abandoned U.S. Patent Application No. 09 / 249,431 filed February 12, 1999, which was a now-abandoned 1998 Continuation-in-Part of US Application No. 09 / 124,447 filed July 29. Background technique [0002] Embodiments of the present invention generally relate to cushioning devices on destructible plunger rod assemblies for...
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