Stylus for key duplicating machine with replaceable segmented stylus

• US 7,571,550 B2
• Filed: 11/09/2006
• Issued: 08/11/2009
• Est. Priority Date: 12/12/2005
• Status: Expired due to Fees

• Current Assignee: East Of Wu Co., Ltd.
• Original Assignee: East Of Wu Co., Ltd.
• Inventors: Wu, Kuo-Shen
• Primary Examiner(s): GUADALUPE, YARITZA
• Application Number:
  US11/594,868
• Publication Number:
  US 20070130786A1
• Time in Patent Office: 1,006 Days
• Field of Search: 335/59, 335/583, 335/580.5, 335/56
• US Class Current: 33/559
• CPC Class Codes: B23Q 35/26 designed for a physical contact with a pattern or a model

Abstract

A stylus for key duplicating machine with replaceable segmented stylus comprising a cylindrical body; a spring-loaded tracer having a slide spindle movably engaged in one end of the cylindrical body, and a replaceable segmented stylus releasably secured on the front end of the slide spindle for replacement of the worn replaceable segmented stylus damaged during key duplicating by new one easily; and a regulating grip angularly movably engaged in the other end of the cylindrical body.

Claims

1. A stylus for key duplicating machine with replaceable segmented stylus comprising:

a cylindrical body having a stopper disposed within the cylindrical body;

a spring-loaded tracer having a slide spindle movably engaged within the cylindrical body and biased backward by engagement of a spring with the stopper and a front wall of the cylindrical body towards a rear end of said cylindrical body;

a replaceable segmented stylus releasably secured on a front end of said slide spindle for easy replacement of said replaceable segmented stylus damaged during key duplicating by a new one; and

a regulating grip angularly movably engaged to the rear end of said cylindrical body.

2. The stylus for key duplicating machine with replaceable segmented stylus as claimed in claim 1, wherein said regulating grip comprises a disc, a screw vertically secured at a center of said disc, and threadedly engaged in the rear end of said cylindrical body, and having an end portion extending into said cylindrical body for pressing against one end of said slide spindle;

said spring being a compression spring received in an interior of said front end of said cylindrical body for biasing said slide spindle, and to enable other end of said slide spindle to be exposed from said cylindrical body; and

a guide secured on said one end of said cylindrical body, for touching and guiding a flat portion of said slide spindle.

3. The stylus for key duplicating machine with replaceable segmented stylus as claimed in claim 2, wherein said compression spring is engaged in between the front wall of said cylindrical body and intermediate periphery of said slide spindle, and said stopper is a C-shaped stopper laterally secured on said slide spindle and an annular cover sheet secured on said front end of said cylindrical body, for biasing said slide spindle backward, in order to enable said spindle to press against an end of said screw.