Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1988-02-24
1992-08-18
Swiatek, Robert P.
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
433114, 433116, A61C 108
Patent
active
051394227
ABSTRACT:
A sleeve that has the shape seen in the longitudinal direction that deviates in cross section and/or has an outside diameter that changes from a shape with a rotational symmetry to a shape with a non-rotational symmetry and has a ridge extending at least a portion of the length of the sleeve to form ledges between the ridge and adjacent curved surfaces. A method for manufacturing the sleeve includes inserting a workpiece in a die having the desired contour for the outer surface of the sleeve, heating the material and subjecting the material to internal pressure to deform the workpiece into the contour of the die to form the sleeve.
REFERENCES:
patent: 4007529 (1977-02-01), Fleer
patent: 4264306 (1981-04-01), Leonard
patent: 4278429 (1981-07-01), Straihammer et al.
patent: 4299626 (1981-11-01), Paton et al.
patent: 4325696 (1982-04-01), Rosenstatter et al.
patent: 4332562 (1982-06-01), Schuss et al.
patent: 4655709 (1987-04-01), Fleer
patent: 4792304 (1988-12-01), Schuss et al.
B. C. Kellock, "Superplastic forming" Machinery and Production Engineering, 30 Jun. 1976, vol. 128, No. 3316, pp. 618-621.
Schuss Werner
Straihammer Reinhard
Lucchesi Nicholas D.
Siemens Aktiengesellschaft
Swiatek Robert P.
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