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US 5,469,758 AGranted
Knob with soft plastic cover
AssigneeThe Grigoleit Company
InventorRobert K. Howie, Jr.
Life of this patent
Estimating the term…
Abstract
A composite knob having an elongated, cylindrical, inner core molded of a relatively stiff plastic and a partial outer covering of a soft resilient plastic molded to the inner core. Anchoring cavities are provided in ribs of the inner core to receive plugs of the soft plastic of the outer covering to anchor the outer covering to the inner core. In a modified embodiment, the ribs are tapered axially rearwardly and the outer covering is formed with rib-like extensions to engage said tapered ribs.
Claims8
A composite knob including:
- an elongated, cylindrical, inner core made of a relatively stiff plastic and having a partial outer covering of a soft, resilient plastic molded to said inner core,
- said inner core having an inner hub, an outer circumferential wall encircling said inner hub, and radially extending ribs connecting said outer circumferential wall and said inner hub,
- said outer circumferential wall having an outer surface and an inner surface,
- each of said ribs having an axial length and a rear axial surface,
- anchoring cavities for said outer covering formed in said ribs radially inwardly of said outer circumferential wall, and
- said anchoring cavities communicating with said outer surface of said outer circumferential wall through narrow passages formed in said wall to receive plugs of said soft, resilient plastic of said outer covering to anchor said outer covering to said core.
3 more elements
Dependencies are inferred from the claim text.