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1. 发明授权

US5683365A Tip protection device 失效
标题翻译：提示保护装置
公开(公告)号：US5683365A
公开(公告)日：1997-11-04
申请号：US482595
申请日：1995-06-07
申请人： Herbert Brown , Joseph J. Chang , Mark Panzera , Thomas Sloane , David L. Bogert , Gerald J. Kovalic
发明人： Herbert Brown , Joseph J. Chang , Mark Panzera , Thomas Sloane , David L. Bogert , Gerald J. Kovalic
IPC分类号： A61M5/158 , A61M5/32 , A61M25/00 , A61M25/06 , A61M5/00
CPC分类号： A61M25/0618 , A61M5/3273 , A61M2005/325
摘要： A safety cover which securably and reliably locks the tip of a cannula in an interior chamber within the safety cover. The cover comprises an elongate body having the interior chamber and an axial through hole which extends along the entire length of the body, through the interior chamber and through which the cannula is slidably received. Displacing elements are positioned within the interior chamber, each of which includes a hole for receiving said cannula therethrough, and which displaces upon retraction of the tip of said cannula, thereby preventing subsequent advancement of said cannula tip. In a first embodiment the displacing elements are annular rings. In a second embodiment, the elements are rigid balls having through holes. In a third embodiment, the displacing elements are a pair of conical elements, one of which is spring biased, each of which includes an offset hole. In each embodiment, it is preferable that the cannula should include a thickened rib adjacent to said tip, and the safety cover should correspondingly include an annular section in the rear portion thereof. The through hole extending through the rear portion has a diameter which is smaller than said thickened rib of said cannula whereby the cannula tip may not be retracted from the safety cover.
摘要翻译：安全盖，其安全可靠地将插管的尖端锁定在安全盖内的内部室中。所述盖包括具有所述内部腔室的细长主体和沿所述主体的整个长度延伸穿过所述内部腔室并且所述套管可滑动地被容纳的轴向通孔。位移元件定位在内部腔室内，每个腔室包括用于接收穿过其中的套管的孔，并且当所述套管的尖端缩回时位移元件位移，从而防止所述套管末端的后续进展。在第一实施例中，移位元件是环形环。在第二实施例中，元件是具有通孔的刚性球。在第三实施例中，位移元件是一对锥形元件，其中一个圆锥形元件是弹簧偏置的，每个都包括一个偏移孔。在每个实施例中，优选地，插管应包括与所述尖端相邻的加厚肋，并且安全盖应相应地在其后部包括环形部分。延伸穿过后部的通孔具有比所述套管的所述加厚肋小的直径，由此套管末端可能不会从安全盖缩回。

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