公开(公告)号：US3926215A

公开(公告)日：1975-12-16

申请号：US38533773

申请日：1973-08-03

Applicant: NAT RES DEV

Inventor： MACLEOD NORMAN

IPC: A61F2/24 ,  F16K15/03

CPC classification number: A61F2/2403 ,  F16K15/03 ,  Y10T137/7903

Abstract: A fluid control valve suited to use as a prosthetic heart valve, has an annular seat member, and a disc, shaped in plan view to correspond with the radially inner portion of a transverse section of the seat, pivotally mounted in the seat for movement to and from a closure position. The disc is pivoted in off-set manner to define smaller and larger disc portions on opposite sides of the pivot axis, and has a non-symmetrical aerofoil cross-sectional shaping perpendicular to this axis with leading and trailing edges respectively located in the disc portions. Normally the seat inner portion will be longitudinally convergent, preferably conically or hyperboloidally so, and the disc will be elliptic.

Abstract translation: 适合用作假体心脏瓣膜的流体控制阀具有环形座椅构件和圆盘，其平面形状形成为与座椅的横向部分的径向内部对应，枢转地安装在座椅中以便运动 并从关闭位置。 盘以偏离方式枢转以在枢转轴线的相对侧上限定较小和较大的盘部分，并且具有垂直于该轴线的非对称翼型横截面形状，其中前缘和后缘分别位于盘部分中 。 通常座椅内部部分将纵向会聚，优选圆锥形或双曲面地，并且盘将是椭圆形的。

公开(公告)号：US3700580A

公开(公告)日：1972-10-24

申请号：US3700580D

申请日：1970-08-10

Applicant: NAT RES DEV

Inventor： MACLEOD NORMAN ,  PROCTOR DAVID

IPC: G01N27/49 ,  G01N27/46

CPC classification number: G01N27/404

Abstract: A WATER-ABSORBENT OXYGEN-PERMEABLE MEMBRANE FOR EXAMPLE OF POLYETHYLENE, IS ARRANGED IN CONTACT WITH TWO ELECTRODES, FOR EXAMPLE OF SILVER AND LEAD REPECTIVELY, SO THAT AN ELECTROCHEMICAL CELL WILL BE FORMED WHEN WATER WITH AN APPROPRIATE ION CONTENT IS ABSORBED BY THE MEM-

BRANE. IN USE THE CHARACTERISTICS OF THE CELL ARE EFFECTED BY OXYGEN DIFFUSING INTO THE MEMBRANE FROM A SOLUTION UNDER INVESTIGATION.