CAIZZA, Richard J.,ODELL, Robert B.,WAYMAN, Brian H.
申请号：
ES11761228
公开号：
ES2574908T3
申请日:
2011.09.16
申请国别(地区):
ES
年份:
2016
代理人:
摘要：
A syringe assembly comprising: a cylinder (520) that includes a cylindrical side wall (524) having an inner surface (526) with a first width of the cross section defining a chamber (528) for fluid retention, an open proximal end (529) 5 and a distal end (521) that includes a distal wall (522) having an opening therethrough in fluid communication with said chamber (528), said side wall (524) includes a rib (510) of said adjacent proximal end (529) defining a second width of the cross section that is smaller than the first width of the cross section； an elongated plunger rod (540) that includes a proximal end (549), a distal end (541), and a main body (544) extending between the proximal end and the distal end (549, 541), the stem of piston (540) is distally and proximally movable within said chamber (528), the proximal end (549) includes a thumb press (543), the distal end (541) includes a coupling portion of the cap (546), The piston rod (540) also includes a flexible protrusion (550) between the thumb press (543) and the main body (544), the protuberance (550) has a cross-sectional width greater than the section width Transversal of the cylinder (520) in the rib (510) and the piston rod (540) further includes a support member (530) that includes an outer edge (539) disposed proximally adjacent to the flexible protuberance (550) and so minus a frangible portion (570) disposed proximally adjacent to the m support member (530) and comprising at least four point connections (572, 573, 574, 575) with a first point connection (573), a second point connection (575), a third point connection ( 572), and a fourth point connection (574) disposed adjacent the edge (539) of the support member (530)； The protuberance (550) includes four blades (551, 552, 553, 554) that extend radially outwardly from the piston rod (540) and are arranged equidistant from each other and in which the first point connection (573) and the second point connection (575) is aligned with a first and a s
