1. A working insert for an endoscopic hollow shank instrument comprising a shank (2), a working electrode (10) being arranged on an outer side of the shank (2) and being axially displaceable relative to the shank (2), a guide component (26a, 26b) connecting the working electrode (10) to the shank (2) at a distal end section of the shank (2), the guide component (26a, 26b) forming an electrical insulation between the working electrode (10) and the shank (2).
2. A working insert according to claim 1, wherein the guide component (26a, 26b) is formed of an electrically non-conductive material.
3. A working insert according to claim 1, wherein the guide component (26a, 26b) consists of plastic.
4. A working insert according to claim 1, wherein the guide component (26a, 26b) is fixedly connected to the working electrode (10).
5. A working insert according to claim 1, wherein the guide component (26a, 26b) at least partly peripherally encompasses the shank (2).
6. A working insert according to claim 1, wherein a tubular guide channel for receiving the shank (2) of the optical system is formed on the guide component (26b).
7. A working insert according to claim 1, further comprising a handle (20) arranged on a proximal side of the working electrode (10), the working electrode (10) being displaceable with respect to the handle (20), the handle (20) at a distal end thereof comprising a tubular guide (24) for the working electrode (10).
8. A working insert according to claim 7, wherein the working electrode (10) is surrounded directly on the proximal side by a reinforcement tube (34), a length of the reinforcement tube (34) being dimensioned such that the reinforcement tube (34) does not contact the guide (24) formed on the handle side.
9. A working insert according to claim 1, wherein the guide component (26a, 26b) includes a radially projecting projection (38) which forms a bearing-contact surface onto an inner wall of a hollow shank (40) of the endoscopic hollow shank instrument.
10. A working insert according to claim 9, wherein the working insert has an optical marking.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An ionic organosilicon compound selected from the formula:
where in each formula:
Y is RO where R is (CH2CH2O)nH where n has a value of one through ten;
a has a value of zero, one and two;
R\u2032 is a methyl or ethyl radical;
R\u2033 is an alkylene group with four carbon atoms;
R\u2032\u2033, R\u2033\u2033 and Rv are alkyl groups containing one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, \u2014CH2C6H5, \u2014CH2CH2OH, \u2014CH2OH, and \u2014(CH2)xNHC(O)Rvi wherein x has a value of from two to ten and Rvi is a perfluoroalkyl radical having one to twelve carbon atoms; and
X is chloride, bromide, fluoride, iodide, acetate or tosylate.
2. An ionic organosilicon compound according to claim 1, wherein said compound is selected from the formula:
wherein:
Y is RO where R is an alkyl group with one to four carbons, (CH2CH2O)nH where n has a value of one through ten;
a has a value of zero, one and two;
R\u2032 is a methyl or ethyl radical;
R\u2032\u2033, R\u2033\u2033 and Rv are alkyl groups containing one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, \u2014CH2C6H5, \u2014CH2CH2OH, \u2014CH2OH, and \u2014(CH2)xNHC(O)Rvi wherein x has a value of from two to ten and Rvi is a perfluoroalkyl radical having one to twelve carbon atoms; and
X is chloride, bromide, fluoride, iodide, acetate or tosylate.
3. An ionic organosilicon compound according to claim 1, wherein said compound is 3-tri-(2-hydroxyethoxy)silyl-2-methylpropyldimethyloctadecyl ammonium chloride.
4. An aqueous composition consisting essentially of at least one water soluble ionic organosilicon compounds of claim 1.
5. The aqueous composition of claim 4; wherein said composition consists essentially of only one ionic organosilicon compound.
6. The aqueous composition of claim 4; wherein said water soluble ionic organosilicon compound consists essentially of between 0.1 to 10 weight percent of said aqueous composition.
7. The aqueous composition of claim 4; wherein said water soluble ionic organosilicon compound is 3-tri-(2-hydroxyethoxy)silyl-2- methylpropyldimethyloctadecyl ammonium chloride.
8. An aqueous composition comprising at least one water soluble ionic organosilicon compound of claim 1.
9. The aqueous composition of claim 8; wherein said composition comprises of only one ionic organosilicon compound.
10. The aqueous composition of claim 8; wherein said water soluble ionic organosilicon compound comprises between about 0.1 to 10 weight percent of said aqueous composition.
11. The aqueous composition of claim 8; wherein said water soluble ionic organosilicon compound is 3-tri-(2-hydroxyethoxy)silyl-2-methylpropyldimethyloctadecyl ammonium chloride.