US4600390A — Apparatus and method for applying a silicon oxide…

Claim 1

Independent Claim 244 words

Apparatus, for applying a carbon-containing and silicon oxide-containing adhesion-promoting layer on a metallic dental prosthesis part (3), having a holder (4) supporting said prosthesis part (3) and a source (41) of silicon oxide, wherein, in accordance with the invention, the source of silicon oxide and carbon comprises at least one flame hydrolysis burner (11); means (41) are provided for supplying metered amounts of carbon-containing fuel gas and a silicon compound in vapor or gas form to said burner (11), said burner, in operation, having a flame cone of a length (L) of at least about 15 cm and up to about 20 cm, and having a gas stream speed of up to about 1 m/sec, said flame hydrolysis burner (11) being located with respect to the dental prosthesis part (3) by a spacing distance (D) of at the most about 15 cm while said layer is being applied, and said flame hydrolysis burner having supplied thereto metered amounts of carbon-containing fuel and air, controlled to provide a flame cone which has a length (L) which exceeds said spacing distance (D) by only up to about 25%, said silicon oxide in gaseous or vapor form being admixed with the air and fuel in the burner; and means (5, 8, 9) for relatively moving the dental prosthesis part (3) and said flame hydrolysis burner (11) in a direction to pass the dental prosthesis part (3) in front of said burner and hence through said flame cone.

Claim 2

Dependent Claim 244 words

Apparatus, for applying a carbon-containing and silicon oxide-containing adhesion-promoting layer on a metallic dental prosthesis part (3), having a holder (4) supporting said prosthesis part (3) and a source (41) of silicon oxide, wherein, in accordance with the invention, the source of silicon oxide and carbon comprises at least one flame hydrolysis burner (11); means (41) are provided for supplying metered amounts of carbon-containing fuel gas and a silicon compound in vapor or gas form to said burner (11), said burner, in operation, having a flame cone of a length (L) of at least about 15 cm and up to about 20 cm, and having a gas stream speed of up to about 1 m/sec, said flame hydrolysis burner (11) being located with respect to the dental prosthesis part (3) by a spacing distance (D) of at the most about 15 cm while said layer is being applied, and said flame hydrolysis burner having supplied thereto metered amounts of carbon-containing fuel and air, controlled to provide a flame cone which has a length (L) which exceeds said spacing distance (D) by only up to about 25%, said silicon oxide in gaseous or vapor form being admixed with the air and fuel in the burner; and means (5, 8, 9) for relatively moving the dental prosthesis part (3) and said flame hydrolysis burner (11) in a direction to pass the dental prosthesis part (3) in front of said burner and hence through said flame cone.

Claim 3

Dependent Claim 29 words

Apparatus according to claim 1, wherein said relative moving means includes means (5) for moving the holder (4) supporting the dental prosthesis part relative to the flame hydrolysis burner.

Claim 4

Dependent Claim 37 words

Apparatus according to claim 1, wherein the relative moving means (5, 8, 9) comprises a turntable (5); and a plurality of holders (4) for a plurality of dental prosthesis parts (3), secured to said turntable, are provided.

Claim 5

Dependent Claim 23 words

Apparatus according to claim 3, wherein the level of said turntable (5) is height-adjsutable (12) with respect to the flame hydrolysis burner (11).

Claim 6

Dependent Claim 27 words

Apparatus according to claim 1, further including means (22a) for height-adjusting the burner (11) with respect to the dental prosthesis part (3) supported in the holder (4).

Claim 7

Dependent Claim 19 words

Apparatus according to claim 1, further including a rotatable support (22) connected to and rotatably supporting the burner (11).

Claim 8

Dependent Claim 22 words

Apparatus according to claim 6, including an adjustable holding link (21) connecting and supporting the burner (11) on said rotatable support (22).

Claim 9

Dependent Claim 21 words

Apparatus according to claim 1, wherein the burner is oriented to project the flame cone (10) in an essentially horizontal direction.

Claim 10

Dependent Claim 19 words

Apparatus according to claim 1, wherein the flame hydrolysis burner (11) comprises a nozzle opening (30) of variable size.

Claim 11

Dependent Claim 29 words

Apparatus according to claim 1, further including a cooling apparatus located at an angle between about 20° to 120° with respect to the orientation of the flame cone (10).

Claim 12

Dependent Claim 30 words

Apparatus according to claim 1, further including a housing (1) defining a ventilated chamber (C), the holder (4) and the dental prostheses (3) supported thereby being located within said chamber.

Claim 13

Dependent Claim 17 words

Apparatus according to claim 11, wherein the flame hydrolysis burner (11) is located in the chamber (C).

Claim 14

Dependent Claim 64 words

Apparatus according to claim 11, further including a separating wall (15) separating the chamber (C) into two chamber portions including a burner chamber (16), said separating wall being formed with a closeable opening (14, 17); and wherein the flame hydrolysis burner is located in the burner chamber, and movable from a position wholly within the burner chamber to a position projecting through said opening.

Claim 15

Dependent Claim 20 words

Apparatus according to claim 1, wherein the flame hydrolysis burner comprises two burner heads (28) located parallel to each other.

Claim 16

Dependent Claim 30 words

Apparatus according to claim 1, further including means (42) for supplying a tinting compound to the fuel-gas mixture being supplied to the burner for coloring the flame of the burner.

Claim 17

Dependent Claim 18 words

Apparatus according to claim 1, wherein said holder (4) supporting the dental prosthesis (3) is bendable or flexible.

Claim 18

Dependent Claim 216 words

A process for applying a carbon-containing and silicon oxide-containing adhesion-promoting layer to a metallic dental prosthesis part (3), in an apparatus having a holder (4) supporting said prosthesis part (3); at least one flame hydrolysis burner (11); and means (5, 8, 9) for relatively moving the dental prosthesis part (3) and said flame hydrolysis burner (11); comprising the steps of (a) supplying ignition energy and controlled amounts of carbon-containing fuel gas and air to said hydrolysis burner; (b) controlling said burner (11) to provide a flame cone which has a length (L) of at least about 15 cm and up to about 20 cm, and having a gas stream speed of up to about 1 m/sec; (c) supplying a metered amount of a silicon compound in vapor or gas form to said burner (11); (d) relatively moving said flame hydrolysis burner (11) and the metallic dental prosthesis part (3) at least once to with a distance (D) of each other of, at the most, about 15 cm, so that said part (3) passes within said flame cone, thereby depositing on said metallic part (3) a layer of silicon oxide which includes 5% to 40%, by weight, of carbon; and (e) removing said prosthesis part (3) from said flame cone until said deposited layer cools and solidifies.

Claim 19

Dependent Claim 216 words

A process for applying a carbon-containing and silicon oxide-containing adhesion-promoting layer to a metallic dental prosthesis part (3), in an apparatus having a holder (4) supporting said prosthesis part (3); at least one flame hydrolysis burner (11); and means (5, 8, 9) for relatively moving the dental prosthesis part (3) and said flame hydrolysis burner (11); comprising the steps of (a) supplying ignition energy and controlled amounts of carbon-containing fuel gas and air to said hydrolysis burner; (b) controlling said burner (11) to provide a flame cone which has a length (L) of at least about 15 cm and up to about 20 cm, and having a gas stream speed of up to about 1 m/sec; (c) supplying a metered amount of a silicon compound in vapor or gas form to said burner (11); (d) relatively moving said flame hydrolysis burner (11) and the metallic dental prosthesis part (3) at least once to with a distance (D) of each other of, at the most, about 15 cm, so that said part (3) passes within said flame cone, thereby depositing on said metallic part (3) a layer of silicon oxide which includes 5% to 40%, by weight, of carbon; and (e) removing said prosthesis part (3) from said flame cone until said deposited layer cools and solidifies.

Claim 20

Dependent Claim 62 words

A process according to claim 17, wherein said step of applying the silicon oxide layer comprises passing the dental prosthesis part (3) through the forward third of a flame cone of a flame hydrolysis burner (11); and including the step of supplying to said burner a fuel gas which includes carbon, air, and an oxidizable silicon compound in gaseous or vapor form.

Claim 21

Dependent Claim 37 words

A process according to claim 18, further including the step of sandblasting the dental prosthesis part (3) before subjecting said dental prosthesis part to the forward third of the flame cone of the flame hydrolysis burner (11).

Claim 22

Dependent Claim 14 words

The coated metallic dental prosthesis product (3) made by the process of claim 17.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-07-14	1990-01-13	1990-07-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-07-14	1994-01-13	1994-07-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-07-14	1998-01-13	1998-07-15	$7700.00	Window Closed / Lapsed

Apparatus and method for applying a silicon oxide-containing adhesion-promoting layer on metallic dental prostheses

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