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EP0191574A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Tooth root canal internal cutter

Assignee: Individual
•
Filing: 1986-01-28
•
Granted: —
•
Expires: 2006-01-28
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Abstract

Abstract A tooth root canal internal cutter has an inner cylinder (2) moved vertically by means of the eccentric part (3b) of a rotary shaft (3) disposed at right angles to a vertical cylindrical portion (1a) of the cutter. The eccentric part (3b) is provided at the tip of the rotary shaft (3) and is inserted into a horizontal cylindrical portion (1b) diposed at right angles to the vertical cylindrical portion (1a). A guide groove (5) is formed in the inner cylinder (2), having a vertical width into which the tip of the eccentric part (3b) is inserted and having a length elongated in the circumferential direction thereof. The cutter also has a grip cylinder (7) which is inserted into the inner cylinder (2), moves with the sliding of the inner cylinder (2), and detachably grips a cutting blade (11).

Inventors

  • 👤 Yoshiro Shoji

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 23:42
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/07

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 138 words
A tooth root canal internal cutter having an inner cylinder (2) movable vertically by means of an eccentric part (3b) of a rotary shaft (3) disposed at substantially right angles to a vertical cylindrical portion (la) of the cutter, the eccentric part (3b) being provided at the tip of the rotary shaft (3) inserted into a horizontal cylindrical portion (lb) disposed at substantially right angles to the vertical cylindrical portion (la), the inner cylinder (2) having a guide groove (5a) having a vertical width into which the tip of the eccentric part (3b) is inserted and having a length elongated in the circumferential direction thereof; the cutter also having a grip cylinder (7) which is inserted into the inner cylinder (2), is movable with the sliding of the inner cylinder (2), and detachably grips a cutting blade (11).
Claim 2
Dependent Claim 138 words
A tooth root canal internal cutter having an inner cylinder (2) movable vertically by means of an eccentric part (3b) of a rotary shaft (3) disposed at substantially right angles to a vertical cylindrical portion (la) of the cutter, the eccentric part (3b) being provided at the tip of the rotary shaft (3) inserted into a horizontal cylindrical portion (lb) disposed at substantially right angles to the vertical cylindrical portion (la), the inner cylinder (2) having a guide groove (5a) having a vertical width into which the tip of the eccentric part (3b) is inserted and having a length elongated in the circumferential direction thereof; the cutter also having a grip cylinder (7) which is inserted into the inner cylinder (2), is movable with the sliding of the inner cylinder (2), and detachably grips a cutting blade (11).
Claim 3
Dependent Claim 25 words
A tooth root canal internal cutter according to claim 1, wherein the guide groove (5a) extends around the entire circumference of said inner cylinder (2).
Claim 4
Dependent Claim 87 words
A tooth root canal internal cutter according to claim 1 or claim 2, wherein the grip cylinder (7) of the inner cylinder has a collar (6) at the lower end thereof, a ball-receiving hole (7c) is provided in a portion of the inner cylinder (2) immediately above the collar (6), at least one ball (8) in the ball-receiving hole (7c) being resiliently pressed or released by a tapered portion provided at the lower portion of said inner cylinder so as to mount or demount said cutting blade.
Claim 5
Dependent Claim 22 words
A tooth root canal internal cutter according to claim 3, wherein said ball and ball-receiving hole are formed in a spindle shape.

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