Hand held building tools

摘要

The present invention is directed generally to tools that are made, at least in part, more durable, particularly one or more working surface(s) of the tools. For example, various tools such as trowels, knives, and scrapers may be made having at least a portion of their blades heat treated to make at least their working edges more durable and extend their useful lives. For example, in various embodiments, a putty knife, taping knife, or scraper blade may have at least one working surface or edge that has been at heat treated while an area of the blade where a handle is permanently attached is not heat treated.

主权项

1. A putty knife, comprising:
a substantially planar permanent non-disposable blade made of a base material and having only selected working edge portion(s) of the blade that are made harder than the base material, a handle that is coplanar with and connected to the blade at an edge portion of the blade distinct from the working edge made of the base material that has not been made harder, whereby the permanent non-disposable blade is made more durable so as to have a longer useful life with improved durability, strength and/or resistance against wear and the blade-to-handle connection is made more durable so that the putty knife does not need to be reworked or disposed of as often.