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US 5,885,318 AGranted
Bushing base plate and process of preparing same
AssigneeTanaka Kikinzoku Kogyo K.K.
InventorsSusumu Shimizu, Makoto Mitani, Katsumi Suguro, Toshio Honma
Life of this patent
Estimating the term…
Abstract
A bushing base plate comprised of a bushing base raw plate containing a circular or irregular aperture having inner surfaces and inner diameters; and a hollow tube having outer surfaces and out diameters which is inserted into the aperture and bonded thereto by thermal diffusion. Prior to insertion of the tube in the aperture, the outer diameters are greater than the inner diameters, thereby producing a pressing force between the outer surfaces of the tube and the inner surfaces of the aperture.
Claims23
A process for preparing a bushing base plate which comprises:
- (a) forming a circular or irregular aperture through a bushing base raw plate, said aperture having inner surfaces and inner diameters;
- (b) inserting a hollow tube having outer surfaces and outer diameters into said aperture;
- and
- (c) bonding the hollow tube to the bushing base raw plate by means of thermal diffusion, said outer diameters prior to said insertion being greater than said inner diameters, thereby producing a pressing force between the outer surfaces of the hollow tube and the inner surfaces of the aperture upon said insertion.
1 more element
A process for preparing a bushing base plate which comprises:
- (a) forming a circular or irregular aperture through a bushing base raw plate, said aperture having inner surfaces and inner diameters;
- (b) inserting a hollow tube into said aperture, said tube having inner and outer surfaces and corresponding inner and outer diameters;
- (c) enlarging the inner diameters of the hollow tube from inside the tube, thereby producing a pressing force between the outer surface of the hollow tube and the inner surfaces of the aperture;
- and
- (d) bonding the hollow tube to the bushing base raw plate by means of thermal diffusion.
2 more elements
A process for preparing a bushing base plate which comprises:
- (a) forming a circular or irregular aperture through a bushing base raw plate, said aperture having inner surfaces and inner diameters and a glass flow-out side and forming a swelling surrounding said aperture at the glass flow-out side;
- (b) perforating the center of the swelling;
- (c) inserting a hollow tube having outer surfaces and outer diameters into said aperture;
- and
- (d) bonding the hollow tube to the bushing base raw plate by means of thermal diffusion, said outer diameters prior to said insertion being greater than said inner diameters, thereby producing a pressing force between the outer surfaces of the hollow tube and the inner surfaces of the aperture upon said insertion.
2 more elements
A process for preparing a bushing base plate which comprises:
- (a) forming a circular or irregular aperture through a bushing base raw plate, said aperture having inner surfaces and inner diameters and a glass flow-out side and forming a swelling surrounding said aperture at the glass flow-out side;
- (b) perforating the center of the swelling;
- (c) inserting a hollow tube into said aperture, said tube having inner and outer surfaces and corresponding inner and outer diameters;
- (d) enlarging the inner diameters of the hollow tube from inside the tube, thereby producing a pressing force between the outer surfaces of the hollow tube and the inner surfaces of the aperture;
- and
- (e) bonding the hollow tube to the bushing base raw plate by means of thermal diffusion.
3 more elements
A process for preparing a bushing base plate which comprises:
- (a) perforating a bushing base raw plate so as to create an aperture having a circular section with a taper angle .theta.1 or having an irregular section with a taper angle .theta.1 and a radius of curvature r1 and a glass flow-in side and a glass flow-out side, the diameter of the aperture on the glass flow-in side being greater than the diameter of the aperture on the glass flow-out side;
- (b) inserting into said aperture from the glass flow-in side to the glass flow-out side and fixing to said aperture a hollow tube having an upper portion and a glass flow-in end provided with an upper taper with either an angle .theta.2 wherein angle .theta.1 is greater than .theta.2 or a radius of curvature r3 wherein radius r3 is greater than r1, said tube having a circular section when said aperture has a circular section or an irregular section when said aperture has an irregular section, said fixing being carried out in a manner so as to tightly adhere the upper portion of the hollow tube to the whole wall of the aperture;
- and
- (c) bonding the hollow tube to the bushing base raw plate by means of thermal diffusion.
1 more element
A bushing base plate comprising:
- (a) a bushing base raw plate containing a circular or irregular aperture having inner surfaces and inner diameters;
- and
- (b) a hollow tube inserted into the aperture, said tube having outer surfaces and outer diameters, said tube being bonded to the bushing base raw plate by means of thermal diffusion, said outer diameters prior to said insertion being greater than said inner diameters, thereby producing a pressing force between the outer surfaces of the hollow tube and the inner surfaces of the aperture upon said insertion.
A bushing plate comprising:
- (a) a bushing base raw plate containing an aperture having a circular section with a taper angle .theta.1 or having an irregular section with a taper angle .theta.1 and a radius of curvature r1 and a glass flow-in side and a glass flow-out side, the diameter of the aperture on the glass flow-in side being greater than the diameter of the aperture on the glass flow-out side;
- and
- (b) a hollow tube having an upper portion inserted into the aperture from the glass flow-in side to the glass flow-out side of the aperture, said tube having, prior to insertion into the aperture, (i) a glass flow-out end which at its periphery is coated with a reinforcing material comprising a material of which the bushing plate raw plate is comprised and (ii) a glass flow-in end provided with an upper taper with either an angle .theta.2 wherein angle .theta.1 is greater than .theta.2 or a radius of curvature r3 wherein radius r3 is greater than r1, said tube having a circular section when said aperture has a circular section or an irregular section when said aperture has an irregular section, the upper portion of the tube being tightly inserted into the wall of the aperture and fixed thereto by means of thermal diffusion.
Dependencies are inferred from the claim text.