DEVICE FOR DESTROYING FORMATIONS IN A BODY
Daniel Cherfas, Marika Cherfas, and Michael Tsipov
from the U. S. Patent Office [website]
US 6,623,489 B2, filed on Jul. 11, 2001
contributed by Paul McCormick
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1. A device for destroying formations in a body, comprising a tubular
member having an axis and introducible into a body to an area of a formation,
said tubular member having a front end; gripping means provided at said
front end of said tubular member for gripping a formation, said gripping
means including a plurality of gripping elements which arranged around
said axis in a circumferential direction and are movable between a closed
position in which they are arranged without gaps between each other to
form a closed space and an open position in which they are spaced from
each other; a tube having a smaller diameter than a diameter or said tubular
member and extending along said axis inside said tubular member, said
tube having a front end connected with said gripping elements of said
gripping means, said tube being axially movable inside said tubular member
between one position in which it acts on said gripping elements so as
to move said gripping elements to said open position and another position
in which said tube acts on said gripping elements so as to move said gripping
elements to said closed position; and a formation destroying element extending
inside said tube and also inside the tubular member and having a front
end provided with a working part operative for destroying the formation
when said working part is brought in contact with the formation, so that
said tube first moves said gripping elements to said open position and
said gripping elements surround a formation, and then said tube moves
said gripping elements to said closed position and said gripping elements
are closed without gaps therebetween to form said closed space, and said
formation destroying element is activated so that said working part destroys
the formation, the device can be withdrawn from a body with fragments
of the formation held inside said closed space formed by said gripping
elements in said closed position.
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