Drill bit

EP4680830A1Pending Publication Date: 2026-01-21ZERDALAB LTD
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Patent Information

Application Number
EP2024709495
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-05-12
Filing Date
2024-02-22
Publication Date
2026-01-21

AI Technical Summary

Technical Problem

Existing drill bits with fixed cutting edges require complex and costly brazing processes for maintenance, making it cumbersome and expensive to replace or repair the cutting edges, especially when they become blunt or damaged.

Method used

A drill bit design featuring a body portion with chambers and a retention member made of material with a higher coefficient of thermal expansion than the body, allowing for easy assembly and secure retention of the cutting edge, which expands to fill the chamber and provide additional force when heated, eliminating the need for specialized tools and reducing maintenance costs.

Benefits of technology

The design enables secure retention of the cutting edge, simplifies maintenance, and reduces the cost and complexity of replacing or repairing the cutting edge, while maintaining the cutting edge's firm retention during drilling, even at elevated temperatures.

✦ Generated by Eureka AI based on patent content.

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    Figure GB2024050488_21112024_PF_FP_ABST
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Abstract

There is described a drill bit comprising: a body portion comprising at least one chamber, the drill bit further comprising at least one cutting element, the at least one cutting element comprising a cutting edge and a retention member; wherein the retention member is removably held within the chamber to retain the cutting edge at a first surface of the body portion; wherein the retention member comprises a material with a higher coefficient of thermal expansion than the material of the body portion. There is also described a kit of parts for a drill bit and a cutting element for use in a drill bit or kit of parts.
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