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:
Nov. 11, 2008
Filed:
Feb. 17, 2005
Luc Maître, Epauvillers, CH;
Luc Maître, Epauvillers, CH;
Bien-Air Holding S.A., Bienne, CH;
Abstract
The handpiece includes at the front a collet arranged for strongly gripping the shank of a removable tool housed in guide bores. The collet includes two or several arms attached to an annular part of the collet to grip the tool shank. Preferably, the collet arms are levers each having a support surface which is far from the jaw and on which a gripping mechanism exerts a force which is multiplied by the lever. The gripping mechanism includes a sliding sleeve having an inner conical surface which produces the force on the collet levers via balls. This arrangement enables a smaller gripping spring to be used, or such spring to be omitted. The balls of the releasing mechanism are guided in helical slots having a flexible lateral strip which holds the gripping mechanism in position via a snap fit.