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US 4,871,289 AGranted
Expansion fastener
AssigneeOlympic Manufacturing Group, Inc.
InventorStanley W. Choiniere
Life of this patent
Estimating the term…
Abstract
An expansion fastener includes a fastener body which has a pair of integral axial anchoring sections. An expander pin is drivable into a throat of the fastener body to force apart the anchoring sections.
Claims14
An expansion fastener comprising:
- fastener body means comprising a head portion defining an axially extending throat, said throat defining a socket, a pair of axially extending anchoring members integrally extending from said head portion and having opposing interior surfaces defining an axial through slot communicating with said throat, a series of axially spaced teeth projecting from said anchor members, said anchor members having a rounded shank portion interposed between said head portion and said teeth;
- expander pin means comprising a head, a generally radially projecting shoulder portion defined by converging surfaces forming a quasi-V-shaped section adjacent said head, and a longitudinal body terminating in a tip, said pin means being dimensioned for reception in said throat,
- so that said expander pin means may be inserted in said throat and driven into said fastener body means wherein the pin means extends into said slot and interacts with said opposing interior surfaces to force apart said anchor members and said pin shoulder is locked in said socket.
An expansion fastener comprising:
- a fastener body comprising a head portion, including a retaining head and defining a central, axially extending throat, a pair of substantially identical, axially extending anchor members integrally extending from said head portion and having opposing interior surfaces defining an axial slot communicating with said throat, a series of axially spaced teeth projecting from said anchor members, said anchor members having a rounded shank portion interposed between said head portion and said teeth;
- an expander pin having a head and a longitudinal body terminating in a tapered tip and dimensioned to be closely received in said throat, said longitudinal body having a generally uniform diameter greater than said first distance, said pin having a radially projecting shoulder defined by converging surfaces forming a quasi-V-shaped surface adjacent said head,
- so that said pin may be inserted into said throat and driven into said fastener body wherein the expander pin extends into the slot and wedgingly interacts with opposing interior surfaces to force apart said anchor members and said shoulder is closely received in said socket to prevent axial displacement of said pin from said fastener body.
An expansion fastener comprising:
- fastener body means comprising a head portion defining an axially extending throat, said throat further defining an axially symmetric socket, a pair of axially extending anchor members integrally extending from said head portion and having opposing interior surfaces defining an axial through slot communicating with said throat, a series of axially spaced teeth projecting from said anchor members, said anchor members having a rounded shank portion interposed between said head portion and said teeth;
- expander pin means comprising a head, a longitudinal body terminating in a tip, and an axially symmetric radially projecting shoulder adjacent said head and having a diameter greater than said head, said pin being dimensioned for reception in said throat,
- so that said expander pin means is insertable in said throat and drivable into said fastener body means wherein the pin extends into said slot and interacts with said opposing interior surfaces to force apart said anchor members and said pin projecting portion is received in said socket to axially lock the expander pin means to the fastener body means.
Dependencies are inferred from the claim text.