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:
Jun. 11, 1991
Filed:
Dec. 21, 1988
Kanji Matsutani, Takanezawa, JP;
Masatoshi Fukuda, Utsunomiya, JP;
Matsutani Seisakusho Co., Ltd., Tochigi, JP;
Abstract
A dental burr has an axis of rotation and a cooling water passage extending therethrough in coaxial relation to the dental burr. The cooling water passage opens to a front end face of the dental burr, and this opening in the front end of the dental burr is disposed in an area including the axis of rotation of the dental burr. A dental handpiece for rotatably holding a dental burr includes a handgrip portion, a hollow head portion provided at a front end of the handgrip portion, and a cooling water passage. This cooling water passage extends along the handgrip portion,and opens at one end to a rear end of the handgrip portion while the other end thereof is connected to an internal space of the head portion. Part of the internal space serves as a passage for communicating the cooling water passage of the dental handpiece with the cooling water passage of the dental burr held by the dental handpiece.