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. 25, 1997
Filed:
Jul. 31, 1996
Shigeru Yamada, Takaoka, JP;
Kitamura Machinery Co., Ltd., , JP;
Abstract
A spindle device for supplying air for cleaning and a coolant for cooling or lubricating, including: a tool holder (11) with a coolant passage (22) through which a coolant is supplied; a spindle (10) having a support surface (26) formed at the front portion thereof for accepting the tool holder (11); a drawing bolt (25) having a through-hole for supplying air or a coolant and movably arranged in the spindle (11) for clamping or unclamping the tool holder (11) accepted on the support portion (26) of the spindle (11); and a pull stud (12) attached on the tool holder (11) and provided with a valve (13), the valve (13) being located in association with the coolant passage (22) and the through-hole, the valve (13) being so constructed as to open or close according to the movement of the drawing bolt (25) in such a manner that the valve (13) opens so as to connect the through-hole to the coolant passage (22) when the tool holder (11) is clamped, whereas the valve (13) temporarily closes so as to shut the connection between the through-hole and the coolant passage (22) when the tool holder (11) is unclamped, wherein a coolant can be supplied from the through-hole to the coolant passage (22) via the valve (13) when the tool holder (11) is clamped, whereas air can be supplied from the through-hole by bypassing the coolant passage (22) when the tool holder (11) is unclamped.