초록 ▼

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

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.

대표청구항 ▼

A unitized expanding dowel for locating and aligning a first part having a through-hole relative to a second part having a hole of the same inside diameter as said through-hole, said dowel comprising: a resiliently deformable sleeve having a generally cylindrical outer surface and an axially extendi

A unitized expanding dowel for locating and aligning a first part having a through-hole relative to a second part having a hole of the same inside diameter as said through-hole, said dowel comprising: a resiliently deformable sleeve having a generally cylindrical outer surface and an axially extending passage, said passage having a frusto-conically shaped inner surface portion, said sleeve being uniformly radially expandable over its entire length and insertable in a first direction within said through hole and said hole; an expansion pin slidably receivable within said passage and having a frusto-conically shaped outer surface portion at least as long as said inner surface portion and complementary in taper to said inner surface portion, said pin being movable within said passage in said first direction to move said outer surface portion into surface-to-surface engagement with said inner surface portion for radially expanding said sleeve uniformly over its entire length and moving said outer surface into tight engagement with said holes and in an opposite direction to remove said outer surface portion from surface-to-surface engagement with said inner surface portion for permitting resilient contraction of said sleeve to remove said outer surface from tight engagement with said holes; and coupling means for connecting said sleeve to said pin to permit movement of said pin in said opposite direction while preventing withdrawal of said pin from within said passage.