Adjustable apparatus for removing surface portions of human tissue

Claim 2

A hand tool for removing surface portions of human tissue by superficial abrasion caused by a stream of a mixture of air with at least one granular abrasive substance striking on the surface of the tissue to be removed, said tool comprising an elongated manipulative body (20), a supply tube (25, 33) for said mixture, a collection tube (26, 31) for the purpose of sucking-in both said mixture and the removed portions of said tissue, each one of said tubes (25, 33; 26, 31) having a terminal portion (33, 31) with a free end, and an operating head (21) secured to said manipulative body (20) at the distal end thereof and housing said terminal portions (33, 31), said body (20) housing the other portion (25, 26) of said tubes (25, 33; 26, 31), said head (21) having a longitudinal axis and being provided with a wall (23) having a wall portion inclined and offset with respect to the said axis, a throughhole (22) being provided in said wall portion and internally communicating with said free ends of said terminal portions (33, 31), said throughhole (22) being aligned with said terminal portion (33) of said supply tube (25, 33) so that, by keeping in contact said throughhole (22) with said surface, said stream of mixture travelling through the terminal portion (33) of said supply tube (25, 33) and said throughhole (22) is caused to strike said surface with an inclined incident angle.

Claim 3

A hand tool according to claim 1, wherein the terminal portion of said supply tube (25, 33) includes a nozzle (33) adapted to convey said mixture toward said throughhole (22).

Claim 4

A hand tool according to claim 2, wherein the distance between the free end of said nozzle (33) and said throughhole (22) is greater than the distance between said throughhole (22) and the free end of the terminal portion (31) of said collection tube (26, 31).

Claim 5

A hand tool according to claim 2 wherein said nozzle is made of a material particularly resistant to abrasion by the abrasive substances.

Claim 6

A hand tool according to claim 4, wherein the material of which said nozzle is formed is a compound of cemented carbides with a predominance of tungsten carbides.

Claim 7

A hand tool according to claim 1, wherein said tubes (25, 33; 26, 31) are parallel to each other, and wherein said body (20) has an essentially cylindrical shape said head being formed of a bell-shaped element (21) coaxial with and closing said body (20) and carrying said throughhole (22).

Claim 8

A hand tool according to claim 6, wherein said bell-shape body (21) establishes with said body (20) a predetermined angular coupling and fluid-tight seal.

Claim 9

A hand tool according the claim 7, wherein between said body (20) and said bell-shape element (21) there is interposed a resilient sealing ring (36).

Claim 10

A hand tool according to claim 7, wherein said body (20) and said bell-shape element (21) have respective coupling means (39, 38) cooperatible with one another to establish said predetermined angular coupling.

Claim 11

Apparatus for removing surface portions of human tissue by superficial abrasion caused by a stream of a mixture of pressurized air with at least one granular abrasive substance striking on the surface of the tissue to be removed, comprising a hand tool (5) to be applied to said surface, first supply means (2) for supplying said pressurized air, second supply means (3) for supplying said abrasive substance, suction means (4), said tool (5) comprising an elongated manipulative body (20), a supply tube (25, 33) for conveying said mixture, duct means for conveying said mixture from said first and second supply means, a collection tube (26, 31) for the purpose of sucking-in both said mixture and the removed portions of said tissue, each one of said tubes (25, 33; 26, 31) having a terminal portion (33, 31) with a free end, the other portion end of said supply tube (25, 33) being connected to said duct means and the other end of said collection tube (26, 31) being connected to said suction means (4), and an operating head (21) secured to said manipulative body (20) at the distal and thereof and housing said terminal portions (33, 31), said body (20) housing the other portion (25, 26) of said tubes (25, 33; 26, 31), said head (21) having a longitudinal axis and being provided with a wall (23) having a wall portion inclined and offset with respect to said axis, a throughhole (22) provided in said wall portion and internally communicating with the free ends of said terminal portions (33, 31), said throughhole (22) being aligned with the terminal portion (33) of said supply tube (25, 33) so that, by keeping in contact said throughhole (22) with said surface, said stream of mixture travelling through the terminal portion (33) of said supply tube (25, 33) and said throughhole (22) is caused to strike said surface with an inclined incident axis.

Claim 12

Apparatus for removing surface portions of human tissue by superficial abrasion caused by a stream of a mixture of pressurized air with at least one granular abrasive substance striking on the surface of the tissue to be removed, comprising a hand tool (5) to be applied to said surface, first supply means (2) for supplying said pressurized air, second supply means (3) for supplying said abrasive substance, suction means (4), said tool (5) comprising an elongated manipulative body (20), a supply tube (25, 33) for conveying said mixture, duct means for conveying said mixture from said first and second supply means, a collection tube (26, 31) for the purpose of sucking-in both said mixture and the removed portions of said tissue, each one of said tubes (25, 33; 26, 31) having a terminal portion (33, 31) with a free end, the other portion end of said supply tube (25, 33) being connected to said duct means and the other end of said collection tube (26, 31) being connected to said suction means (4), and an operating head (21) secured to said manipulative body (20) at the distal and thereof and housing said terminal portions (33, 31), said body (20) housing the other portion (25, 26) of said tubes (25, 33; 26, 31), said head (21) having a longitudinal axis and being provided with a wall (23) having a wall portion inclined and offset with respect to said axis, a throughhole (22) provided in said wall portion and internally communicating with the free ends of said terminal portions (33, 31), said throughhole (22) being aligned with the terminal portion (33) of said supply tube (25, 33) so that, by keeping in contact said throughhole (22) with said surface, said stream of mixture travelling through the terminal portion (33) of said supply tube (25, 33) and said throughhole (22) is caused to strike said surface with an inclined incident axis.

Claim 13

Apparatus according to claim 10, further including said abrasive substance, wherein said abrasive substance is preferably constituted by aluminum derivatives such as corundum.

Claim 14

Apparatus according to claim 10, wherein said first supply means (2) includes a pressurized air generator means (6) and said suction means (4) includes a suction pump (15) and a collection reservoir (16) connected thereto for collecting said removed portions of tissue, wherein said apparatus further comprises electrical means for operating said generator means and said suction pump.