Pipe Diametering Tools

By arranging the output shaft, motor shaft, and jaw rotation mechanism in parallel and overlapping configurations, the pipe expanding tool achieves compactness in narrow spaces, addressing the bulkiness of conventional tools and enhancing maneuverability.

JP7888380B2Active Publication Date: 2026-07-13MAKITA CORP
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Patent Information

Application Number
JP2022105879
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-06-30
Publication Date
2026-07-13
Estimated Expiration
2042-06-30

AI Technical Summary

Technical Problem

Conventional pipe diameter expanding tools for synthetic resin pipes are bulky and difficult to maneuver in narrow spaces due to the coaxial arrangement of the jaw rotation mechanism with the output shaft, limiting their compactness in the front-to-back direction.

Method used

The pipe expanding tool arranges the output shaft, motor shaft, and jaw rotation mechanism in parallel and overlapping configurations, allowing for a compact design in the front-to-back direction, and incorporates a power conversion mechanism with an idle gear and a one-way clutch to enhance compactness and efficiency.

Benefits of technology

This configuration enables the tool to be compactly installed in narrow spaces, improving maneuverability and reducing the overall size while maintaining effective pipe diameter expansion capabilities.

✦ Generated by Eureka AI based on patent content.

Smart Images

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Patent Text Reader

Abstract

To provide a compact pipe diameter expanding tool in a front-to-back direction.SOLUTION: A pipe diameter expanding tool 1 for expanding a diameter of an end of a synthetic resin fluid pipe has a motor shaft 20a that is rotated by an electric motor 20. The pipe diameter expanding tool 1 has a feed screw mechanism 25 that converts the rotation of the motor shaft 20a into a back-and-forth movement of an output shaft 27. The pipe diameter expanding tool 1 has a plurality of jaws 4 that are pushed by a wedge 3 provided on a front part of the output shaft 27 to open each other radially outward. The pipe diameter expanding tool 1 has a shaft 31 that axially rotates in conjunction with the rotation of the motor shaft 20a, and a jaw rotation mechanism 30 that axially rotates the plurality of jaws 4 by the shaft 31. The output shaft 27, the motor shaft 20a, and the shaft 31 of the jaw rotation mechanism 30 are arranged in parallel with each other and overlapping in a front-back direction.SELECTED DRAWING: Figure 12
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Citation Information

Patent Citations

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    JP2019000895A

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  • Expanding tool

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  • Expansion tool

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  • PEX expanding tool

    US9862137B2