Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
1999-06-28
2001-05-08
Nguyen, Anhtuan T. (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S110000
Reexamination Certificate
active
06228066
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to injury resistant needle devices for blood collection, intravenous use, etc.
Needles for blood collection and for intravenous use are widely utilized. After respective operations of blood collection or intravenous use, there is a possibility of injuring of personnel of the exposed end of the needle. In order to prevent such an injury, many devices have been designed to cover the needle end after the use. One of such devices was invented by us as disclosed in U.S. Pat. No. 5,067,946. In this device the needle unit which has a needle has first engaging formations, and the rotary member is turnable by a user, has second engaging formations which engage with the first engaging formations so that by turning the rotary member the needle unit is displaced between an exposed position in which a needle is located outside of a protective tube and a retracted position in which the needle is completely confined inside the protective tube. This construction can be further improved.
SUMMARY OF THE INVENTION
Accordingly, it is an object of present invention to provide an injury resistant device which is a further improvement of the existing devices.
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a injury resistant needle device which has an outer protective tube, a needle unit having a needle which is movable relative to the outer protective tube between an extended position in which the needle is exposed outside of the outer protective tube and a retracted position in which the needle is completely confined inside the outer protective tube, means for moving the needle unit between the extended and retracted positions, the moving means including a plurality of first engaging formations provided on the needle unit, and a rotary member provided with the second interengaging formations interengageable with the first engaging formations and turnable by a user, and means for turning the rotary member by a user, the turning means being formed so that when a user acts initially on the turning means the rotary member is turned for displacing the needle unit from the extended position to the retracted position and during a further action by the user the turning means is deactivated so as not to allow turning of the rotary member.
When the injury resistant needle device is designed in accordance with present invention, it provides for an additional protective in reliably confining the needle after the use inside the protective tube.
The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
REFERENCES:
patent: 5067946 (1991-11-01), Zhadanov
patent: 5154699 (1992-10-01), Ryan
patent: 5997485 (1999-12-01), Ahmadzadeh
Zhadanov Eli
Zhadanov Sam
Nguyen Anhtuan T.
Zborovsky I.
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