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US 7,766,585 B2Granted
Irregular-shank tools and drivers therefor
AssigneeTeam Fair Holdings Limited
InventorsKailash C. Vasudeva, Satnam Singh
Life of this patent
Estimating the term…
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AssigneeTeam Fair Holdings Limited
InventorsKailash C. Vasudeva, Satnam Singh
Estimating the term…
A tool (1) has a distal operative portion and a proximal shank (2) with a mounting portion (3), for mounting the tool in a holder (10). A substantial portion of the mounting portion has a cross-sectional shape with at least one and fewer than six 60-degree segments thereof having segment ends joined by a flat surface (5). The holder has a distal axial aperture or mounting hole (12) for receiving the tool (1), the aperture having a cross-sectional shape which has 60-degree segments thereof having segment ends joined by a flat surface (13), but no more such flat surface segments than those corresponding to flat surface segments of the tool. The holder further has a ball-detent (21) mechanism or other locking mechanism for engaging the mounting portion (3) of the tool (1).
For use in a tool holder having an aperture with a cross-sectional shape having at least one non-circular 60-degree segment, a tool having a distal operative portion and a proximal shank with a mounting portion for mounting said tool in said aperture of said tool holder, said mounting portion comprising at least one cross section including circular and non-circular portions, said non-circular portion having at least one 60-degree segment configured for engagement in said aperture with said non-circular 60-degree segment of said aperture and wherein each circular portion has a common centre of axis with the tool;
A combination of a tool and a tool driver having a holder with a distal axial aperture for receiving said tool, said tool having a distal operative portion and a proximal shank with a mounting portion for mounting said tool in said holder, said mounting portion comprising at least one cross section including circular and non-circular portions, said non-circular portion having at least one 60-degree segment configured for engagement in said aperture with a non-circular 60-degree segment of said aperture and wherein each circular portion has a common centre of axis with the tool, said aperture having a cross-sectional shape having a 60-degree segment for each of said 60-degree segments of said mounting portion, shaped correspondingly to each said non-circular segment of said mounting portion wherein there are two said 60-degree segments, each having a flat surface, said two segments being on opposite sides of said mounting portions from each other;
Dependencies are inferred from the claim text.