Raymond J Hutten

US Patent:

53562526, Oct 18, 1994

Filed:

Aug 6, 1993

Appl. No.:

8/102836

Inventors:

Lawrence V. Whistler - East Amherst NY
Raymond J. Hutten - Tonawanda NY

Assignee:

S.B. Whistler & Sons, Inc. - Akron NY

International Classification:

F16B 1306

US Classification:

411 45

Abstract:

A unitized expanding dowel is disclosed for accurately and repeatably locating a part having a through hole relative to a reference part having a hole of like size. The dowel includes a radially expandable, resiliently deformable cylindrical sleeve having an axial passage therethrough. A portion of the passage is frusto-conically shaped to complement a tapered expansion pin movable within the axial passage in a first axial direction to force the outer surface of the sleeve to radially expand into tight surface engagement with inner surfaces of the holes. Coupling means connect the sleeve to the expansion pin and permit movement of the pin in an opposite direction to allow contraction of the sleeve away from tight engagement with the holes while preventing withdrawal of the pin from the sleeve passage.