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US 5,390,572 AGranted
Tool with immproved impact and torque capabilities and having ergonomic handle
AssigneeVermont American Corporation
InventorsVed P. Gakhar, Wilfred M. McCord
Life of this patent
Estimating the term…
Abstract
A tool with improved impact and torque capabilities and having ergonomic handle. The tool may be a screwdriver, chisel, or the like. For example, the tool shank has a hex shaped portion integral to the two part ergonomic handle, which, with the dual molded handle composition, provides these increased tool capabilities. The ergonomic handle has a polypropylene core molded about the shank and a thermoplastic rubber cushion grip molded about the polypropylene core.
Claims18
A tool, comprising:
- (a.) a shank, said shank having a tool end and a handle end, said shank having an impact surface area toward said handle end;
- (b.) a body having a bore therethrough, said body being placed over said handle end of said shank, said body securely fitting onto said shank, said body providing means for increasing said impact surface area toward said handle end;
- and,
- (c.) a unitary molded handle, said handle having an inner core portion having a first hardness, said handle having an outer grip portion having a second hardness, said outer grip portion extending at least partway around said inner core portion, said first hardness being harder than said second hardness, said inner core portion being molded about said shank to envelop said handle end and said body and wherein said outer grip portion is molded at least partway around said inner core portion.
1 more element
A tool, comprising:
- (a.) a shank, said shank having a tool end and a handle end, said shank having an impact Surface area toward said handle end, said shank having a plurality of axially-aligned wings positioned toward said handle end;
- (b.) a hexagonal-shaped nut, said nut being press fitted securely onto said handle end of said shank, said nut engaging said shank wings, said nut providing means for increasing said impact surface area toward said handle end;
- and,
- (c.) a unitary handle, said handle having an inner core portion having a first hardness, said handle having an outer grip portion having a second hardness, said first hardness being harder than said second hardness, said inner core portion being molded about said shank to envelop said handle end and said shank wings and said nut, said inner core portion having a plurality of slots therein, said outer grip portion being molded at least partway around said inner core portion to envelop said plurality of slots;
- wherein said inner core portion comprises polypropylene
2 more elements
Dependencies are inferred from the claim text.