The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 1996
Filed:
Jun. 15, 1994
Applicant:
Inventor:
Juergen Wohlgemuth, Darmstadt, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C / ;
U.S. Cl.
CPC ...
433132 ; 415904 ;
Abstract
A dental turbine drive which is provided with an arrangement to prevent suctioning of particles after deactivation of the drive air into the return air line. To accomplish this, the turbine space is closed during a run-out phase of the rotor except for an outflow channel that is arranged close to the axis of the rotor shaft adjacent the tool side and is connected to a return air channel. The return air channel can discharge directly into the outflow channel at a point spaced from the main portion of the rotor and a valve arrangement may be presented for closing the air opening once the input air has been interrupted.