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US 5,472,448 AGranted
Surgical knife blade holder and support
AssigneeG & G Medical Instruments Ltd.
InventorsGerald P. Marinoff, G. Lawrence Abrams
Life of this patent
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AssigneeG & G Medical Instruments Ltd.
InventorsGerald P. Marinoff, G. Lawrence Abrams
Estimating the term…
The surgical knife of the present invention includes a substantially cylindrical housing which has an external housing surface and one open end. A planar knife blade is support for axial movement within the housing so that one end of the knife blade can be extended beyond the open end of the housing. Means, which are well known in the art, are carried by the housing and connected to the knife blade to cause movement of the knife blade in an axial direction for extension beyond the open end. A raised surface is provided on the housing which has a cross section dissimilar to the cross section of the housing for use in preventing rotation of the knife to thereby orient the knife blade along a desired plane when the knife is supported on a surface. One embodiment of the surgical knife provides for the dissimilar cross section to be a square with four flat surfaces so that these surfaces can rest in a complimentary groove in a supporting tray of a knife blade setting device. A complimentary support tray is also provided to insure that the knife is properly oriented in a knife setting device when the housing is carried by the support tray.
An ophthalmological surgical knife comprising a substantially cylindrical housing having an external housing surface, and one open end, a planar knife blade carried by said housing axially moveable for extension beyond said open end, means carried by said housing connected to said blade for causing said movement, at least one surface area on said housing having a cross sectional shape dissimilar to the cross sectional shape of said cylindrical housing for preventing rotational movement of said housing in order to orient said knife blade along a desired plane when said knife is supported on a surface, a supporting tray for supporting said housing thereon when moving the knife blade relative to an end of said housing in order to set the extension thereof a predetermined distance beyond said open end, said supporting tray having a longitudinally extended groove having a cross sectional shape complimentary with the cross sectional shape of said surface area in order to prevent rotational movement of said knife blade within said groove when said knife blade is carried therein in order to orient said knife blade along a desired plane.
Dependencies are inferred from the claim text.