A machine tool includes a spindle side position measuring unit measuring a spindle axial position in a spindle radial direction relative to a first reference position and a tool side position measuring unit measuring the position of a tool post relative to a second reference position. The spindle side position measuring unit includes a first …

Legal parties

Inventors (applicants): Atsushi Nakagawa
Assignees (initial): Murata Machinery, Ltd. (Kyoto, JP)
Agents: Keating & Bennett, LLP (attorney)

The application was examined by Daniel Howell (USPTO dept. 3722), Nicole N Ramos


  • 1. A machine tool which comprises: …
  • 2. The machine tool as claimed in claim 1 , further comprising: …
  • 3. The machine tool as claimed in claim 1 , wherein the headstock is provided …

International priority data

JP: 2009-251736 / Nov. 2, 2009 (national)

Cited documents


  • JP 2009028819 A, Feb. 1, 2009
  • McMurtry US 4561058 A / 700/195, Dec. 1, 1985
  • DE 102008046940 A1, Mar. 1, 2010
  • JP 11090788 A, Apr. 1, 1999
  • JP 2001-144191 A, May. 1, 2001
  • Nakagawa US 2002/0059851 A1, May. 1, 2002
  • JP 2002-144191 A, May. 1, 2002
  • Nakagawa US 6615697 B2 / 82/118, Sep. 1, 2003
  • DE 2432671 A1, Oct. 1, 1974
  • JP 2004-322255 A, Nov. 1, 2004
  • JP 10-277889 A, Oct. 1, 1998
  • Sakuraba US 5623857 A / 82/1.11, Apr. 1, 1997
  • DE 4238504 A1, May. 1, 1994

Brief Description of the Drawings

FIG. 1 is an explanatory diagram illustrating a top plan view of a machine tool main body in a machine tool, according to a first preferred embodiment of the present …


Background of the Invention

1. Field of the Invention The present invention relates to a machine tool such as, for example, a turning machine, a drilling machine, or a grinding machine and, more particularly …

Cross Reference to the Related Application

This application is a continuation application, under 35 U.S.C. §111(a) of international application No. PCT/JP2010/068432, filed Oct. 20, 2010, which claims priority to Japanese Patent Application No. 2009-251736, filed Nov. …

Detailed Description of the Preferred Embodiments

With particular reference to FIGS. 1 to 6 , a first preferred embodiment of the present invention will be described in detail. The machine tool shown therein preferably is a numerical …

More details about Machine Tool

Miscellaneous patent data

The assignee location is Kyoto (JP); its company is Murata Machinery, Ltd., the published inventor's name is Nakagawa Atsushi, invented by Atsushi Nakagawa, the assignee is a foreign company or corporation, similar categories include supplemental nonrotative tool, according to the final size of the previously machined workpiece, designed for sensing the pattern, model, or drawing without physical contact, mechanically only, Expansible, Having work oscillator, Collet or spindle, means of roller-ways, Features relating to transfer of work between machines, pattern, guide or cam means (noncircular product), 11 claims comprise the protection scope, application examiners - Daniel Howell, Nicole N Ramos (3722 USPTO department), categorized under With program control as a primary classification, the invention details are shown in 12 figures, the grant number is 08631727 (publication number), the application publication date is Apr. 26, 2012, the recorded agent's company is Keating & Bennett, LLP, numbered 13/456,332 (application), the exemplary claims include number 1, the known applicant's name is Atsushi Nakagawa, the exemplary patent drawings are Explanatory diagram illustrating a top plan, Fragmentary top plan view illustrating, Machine Tool, Perspective view of the machine, the patent particularly claims a machine tool which comprises…, the patent was extended by 91 days, the grant publication date is Jan. 21, 2014, the invention is named Machine Tool, illustrated by 10 drawings.

Invention classification information

The invention is classified under Tool or surrogate, With program control, Headstock, Electrical type, for indicating or measuring existing or desired position of tool or work, Lathe Thermal Regulation, With tool turret. The designated search classifications include Bit with respect to workpiece or workpiece holder, Screw thread, Cutter with respect to workpiece end, Control, Electrical type, Cutter or shaper, With program control, With tool turret, Carriage feed, Spindle or chuck with respect to workpiece or workpiece support, Lathe Thermal Regulation, And tool turret, Headstock, Tool or surrogate.

Patent details
Publication number 08631727
Publication date Jan. 21, 2014
Kind code B2
Application number 13/456,332
Application date Apr. 26, 2012
Application type U
Application series code 13
Extension term 91
National classification 82/118
Total number of claims 11
Exemplary claims 1
Number of drawings 10
Number of figures 12
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