Major-minor tool shank for machine tool

Patent 4673319 Issued on June 16, 1987. Estimated Expiration Date:

February 11, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Travel limit stop pin
Patent #: 4204304
Issued on: 05/27/1980
Inventor: Eidam

Toolholder adapter
Patent #: 4238167
Issued on: 12/09/1980
Inventor: Brugger , et al.

Tool-fitting device
Patent #: 4274774
Issued on: 06/23/1981
Inventor: Haga , et al.

Tool holder with coolant inducer Patent #: 4563116
Issued on: 01/07/1986
Inventor: Edens

Inventor

Ishikawa, Kazutomi

Assignee

Mori Machinery Co., Ltd.

Application

No. 06/828498 filed on 02/11/1986

US Classes:

409/234, With cutter holder279/145, For particular tool or workpiece279/900ADAPTED FOR AUTOMATIC TOOL CHANGER

Examiners

Primary: Briggs, William R.

Attorney, Agent or Firm

Koda and Androlia

International Classes

B23B 31/107 (20060101)
B23B 31/00 (20060101)
B23B 31/10 (20060101)

Foreign Application Priority Data

1985-02-16 JP

Abstract

A major-minor tool shank for a machine tool including a major tool shank for fitting a minor stool shank therein. One end of the major tool shank is a minor taper pot provided with a lock mechanism for locking the minor tool shank, the lock mechanism including lock pins installed in holes opening through the wall of the minor taper pot. A cylindrical tool grip and a sleeve cap cover the minor taper pot, and a coil spring is provided between the tool grip and the sleeve cap. With the aid of spring force, the inner end of the lock sleeve pushes the lock pins in the radial direction and the pins latch the pull stud of the minor tool shank to connect and hold the minor tool shank in the major tool shank. When the lock sleeve is pushed in the axial direction, overcoming the spring force, the lock pins are released from the pull stud of the minor tool shank. Thus, the minor tool shank can snap off the major tool shank.