Source: https://patents.google.com/patent/US6485305?oq=flatulence
Timestamp: 2018-03-21 17:08:19
Document Index: 205048468

Matched Legal Cases: ['arts 1', 'art 3', 'art 3', 'art 3', 'arts 1', 'arts 1', 'art.\n2', 'art.\n3', 'art.\n4', 'art.\n5', 'art.\n7']

US6485305B1 - Blank for producing a formed dental part - Google Patents
Blank for producing a formed dental part Download PDF
US6485305B1
US6485305B1 US08824500 US82450097A US6485305B1 US 6485305 B1 US6485305 B1 US 6485305B1 US 08824500 US08824500 US 08824500 US 82450097 A US82450097 A US 82450097A US 6485305 B1 US6485305 B1 US 6485305B1
US08824500
In the known blank, the retainer projection must be very precisely fabricated in order to be able to adhere to the required position of ±0.01 mm. In terms of fabrication, thus, the retainer projection is of a high-quality part, so that simple manufacturing methods, such as, for example, injection molding, impact molding, die-casting, metal sintering or the like, therefore, do not come into consideration for the manufacture of the retainer.
The principles of the present invention are particularly useful when incorporated in the inventive blank, which is generally indicated at 10 in FIG. 1. The blank 10 includes a blank member or body 1 composed of a material standard in dental technology, for example ceramic material, and from which the formed part is to be fabricated later by removal of the material. The blank member 1 has a cylindrical form, which preferably has a circular-cylindrical cross section. The body 1 has relatively rough dimensions, as far as tolerance, and, as a result, the manufacturing process, such as pressing, casting, sintering or the like, is not made difficult. Typically, the tolerances lie in a range of ±{fraction (2/10)} mm.
In a known way, a retainer projection 2 adjoins an end face 11 of the blank member or body 1. The retainer projection 2 comprises a circular-cylindrical flange 2 a with a thickness that is adequate in order to enable a reliable securing to the body 1, for example by gluing. An acceptance shaft 2 b of the retainer projection 2 is dimensioned so that it fits into a predetermined receptacle or chuck of a processing machine. The tolerance of the diameters 2 a and 2 b can be selected so that a cost-beneficial manufacture is possible. Typically, this likewise lies in a range of ±{fraction (2/10)} mm. The connecting of the parts 1 and 2 is not subject to any specific demands in terms of adhering to centricity or, respectively, concentricity. The concentricity can lie in the range of the afore-mentioned rough tolerances of ±{fraction (2/10)} mm. Accordingly, the retainer projection 2 can be manufactured according to a varied cost-beneficial method, such as the initially-mentioned injection molding.
A set part 3 is placed on an end face 12 of the blank member 1 lying opposite the retainer projection 2 and the end face 11. The set part 3 serves the purpose of defining the size and position of the processing tool, and, by contrast to the retainer projection 2, has close tolerances, for example, it has fabrication dimensions typically lie in the range of tolerances of ±{fraction (1/100)} mm. A circular cylinder fabricated of metal is preferably utilized for the part 3, wherein the cylindrical diameter is inherently arbitrarily selected. A set member 3 is placed centrally on the blank member 1 of the material, whereby, however, there are no specific demands made of the concentricity relative to the parts 1 and 2. The only thing that is critical is that a parallelism of the cylinder faces is established, at least at two locations turned 180°, and the spacing x between these surfaces from one another is known. The connection between the parts 1 and 3 can occur by gluing.
FIG. 2 shows a modification or embodiment of a blank 10′ with a blank member 1′ comprising a peg-shaped continuation 1 a that is provided with a coating 4 of tenacious material, such as plastic or metal. The coating serves the purpose of avoiding breakage when securing the blank in a corresponding holding mechanism of the processing machine. The dimensional demands made of the retainer projection 1 a and the coating or sleeve 4 also lie in a range of ±{fraction (2/10)} mm. The retainer projection need not have close tolerances.
1. A blank for producing a formed part that can be used for replacement or restoration of one or more teeth by removing material with at least one tool chucked in a processing machine, said blank comprising a blank member of a tooth restoration material from which the formed part can be worked with a tool, a retainer projection extending from one end of the blank member for holding the blank member in the processing machine, and a separate reference part having a circular-cylindrical cross section and containing at least two reference surfaces that are defined with a space between one another with a close tolerance in a range of ±{fraction (1/100)} mm, said reference part being secured in place on an end of the blank member lying opposite the retainer projection, the diameter of the retainer projection, the concentricity of the blank member and the concentricity of the reference surface in respect to the retainer projection having tolerances in a range of ±{fraction (2/10)} mm, which are rough tolerances compared with the close tolerances of the two reference surfaces of the reference part.
2. A blank for producing a formed part that can be used for replacement or restoration of one or more teeth by removing material with at least one tool chucked in a processing machine, said blank comprising a blank member of a tooth restoration material from which the formed part can be worked with a tool, a retainer projection extending from one end of the blank member for holding the blank member in the processing machine, and a reference part being a member having a circular-cylindrical cross section and formed of a rod material cut to length, said reference part being arranged at an end of the blank member lying opposite the retainer projection, said reference part having at least two reference surfaces that are defined with a space between one another with close tolerances in a range of ±{fraction (1/100)} mm, the diameter of the retainer projection, the concentricity of the blank member and the concentricity of the reference surface in respect to the retainer projection having tolerances in a range of ±{fraction (2/10)} mm, which are rough tolerances compared with the close tolerances of the two reference surfaces of the reference part.
3. A blank for producing a formed part that can be used for replacement or restoration of one or more teeth by removing material with at least one tool chucked in a processing machine, said blank comprising a blank member of a tooth restoration material from which the formed part can be worked with a tool, a retainer projection extending from one end of the blank member for holding the blank member in the processing machine, and a reference part being arranged at an end of the blank member lying opposite the retainer projection, the reference part being formed of a set pin, having a circular-cylindrical cross section, said reference part having at least two reference surfaces that are defined with a space between one another with close tolerances in a range of ±{fraction (1/100)} mm, the diameter of the retainer projection, the concentricity of the blank member and the concentricity of the reference surface in respect to the retainer projection having tolerances in a range of ±2 mm, which are rough tolerances compared with the close tolerances of the two reference surfaces of the reference part.
4. A blank for producing a formed part that can be used for replacement or restoration of one or more teeth by removing material with at least one tool chucked in a processing machine, said blank comprising a blank member of a tooth restoration material from which the formed part can be worked with a tool, a retainer projection extending from one end of the blank member for holding the blank member in the processing machine, and a reference part being formed of a cylindrical roller, said reference part being arranged at an end of the blank member lying opposite the retainer projection, said reference part having at least two reference surfaces that are defined with a space between one another with close tolerances in a range of ±{fraction (1/100)} mm, the diameter of the retainer projection, the concentricity of the blank member and the concentricity of the reference surface in respect to the retainer projection having tolerances in a range of ±{fraction (2/10)} mm, which are rough tolerances compared with the close tolerances of the two reference surfaces of the reference part.
5. A blank for producing a formed part that can be used for replacement or restoration of one or more teeth by removing material with at least one tool chucked in a processing machine, said blank comprising a blank member of a tooth restoration material from which the formed part can be worked with a tool, a retainer projection extending from one end of the blank member for holding the blank member in the processing machine, the retainer projection and the blank member being composed of the same material and a reference part being glued onto an end of the blank member lying opposite the retainer projection, said reference part having at least two reference surfaces that are defined with a space between one another with close tolerances in a range of ±{fraction (1/100)} mm, the diameter of the retainer projection, the concentricity of the blank member and the concentricity of the reference surface in respect to the retainer projection having tolerances in a range of ±{fraction (2/10)} mm, which are rough tolerances compared with the close tolerances of the two reference surfaces of the reference part.
7. A blank according to claim 6, wherein the close tolerances are ±{fraction (1/100)} mm and the rough tolerances are ±{fraction (2/10)} mm.
US08824500 1996-03-29 1997-03-27 Blank for producing a formed dental part Expired - Lifetime US6485305B1 (en)
DE19612699 1996-03-29
DE1996112699 DE19612699C5 (en) 1996-03-29 1996-03-29 Blank for producing a dental molding
US6485305B1 true US6485305B1 (en) 2002-11-26
ID=7789961
US08824500 Expired - Lifetime US6485305B1 (en) 1996-03-29 1997-03-27 Blank for producing a formed dental part
US (1) US6485305B1 (en)
JP (1) JP3927641B2 (en)
DE (1) DE19612699C5 (en)
US20070172787A1 (en) * 2004-04-23 2007-07-26 Peter Fornoff Method for production of a dental fitting body
WO2001035854A1 (en) * 1999-11-17 2001-05-25 3M Innovative Properties Company Mill blank for dental prosthesis
DE10150647A1 (en) * 2001-10-13 2003-04-30 Rauter Vita Zahnfabrik A method and mold element for the manufacture of dentures
JP4704244B2 (en) * 2006-02-28 2011-06-15 株式会社ジーシー Dental prosthesis for the block holder
DE4030185A1 (en) 1990-09-24 1992-03-26 Siemens Ag Calibrating machine tools to generate complex shapes - optically scanning to provide data for comparison with reference e.g. for dental crown
US7214435B2 (en) * 2000-12-18 2007-05-08 3M Innovative Properties Company Dental mill blank assembly
US8186998B2 (en) * 2003-05-19 2012-05-29 Sirona Dental Systems Gmbh Blank-holding means and method of surveying same
JP3927641B2 (en) 2007-06-13 grant
DE19612699C5 (en) 2004-03-04 grant
DE19612699C1 (en) 1997-07-03 grant
JPH105249A (en) 1998-01-13 application
US4525910A (en) 1985-07-02 Resilient tipped needle valve
US7018092B2 (en) 2006-03-28 Spiral spring for time measuring device
US5775911A (en) 1998-07-07 Method and apparatus for producing a shaped article by sonoerosion
EP0110797A1 (en) 1984-06-13 Process for producing a dental prosthesis
US5567156A (en) 1996-10-22 Inlay, inlay holder, method for tooth restoration, and tooth restoration set for carrying out the method
US4054995A (en) 1977-10-25 Pin with sleeve for making dental prosthesis
JP2001071204A (en) 2001-03-21 Chip, holdder, and cutting tool
US4778387A (en) 1988-10-18 Guide attachment for dental treatment tip
US6854741B2 (en) 2005-02-15 Universal collect adapter tool
US5200010A (en) 1993-04-06 Method for manufacturing lens array optical system
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PFEIFFER, JOACHIM;REEL/FRAME:008710/0945
Free format text: CONTRACT OF PURCHASE AND SALE;ASSIGNOR:SIRONA DENTAL SYSTEMS GMBH & CO KG;REEL/FRAME:012348/0388