Browse Prior Art Database

Non-Circular Dowel Pin

IP.com Disclosure Number: IPCOM000113675D
Original Publication Date: 1994-Sep-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 96K

Publishing Venue

IBM

Related People

Barenboim, M: AUTHOR [+2]

Abstract

Disclosed is a non-circular metal dowel pin formed by grinding away arcuate sections of material from opposite sides of a circular dowel pin.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Non-Circular Dowel Pin

      Disclosed is a non-circular metal dowel pin formed by grinding
away arcuate sections of material from opposite sides of a circular
dowel pin.

      Figs. 1 and 2 depict a conventional diamond dowel pin, with Fig
1.  being an isometric view, while Fig. 2 is a plan view showing an
end of the pin.

      Fig. 3 is an exploded isometric view showing a typical
application of a diamond dowel pin.

      Figs. 4 and 5 depict the presently disclosed non-circular dowel
pin, with Fig. 4 being an isometric view, while Fig. 5 is a plan view
showing an end of the pin.

      Referring first to Figs. 1 and 2, a conventional dowel pin 10
is formed from a circular (cylindrical) dowel pin, having a chamfered
surface 11 at each end, by cutting away material to form a pair of
facets 12 intersecting along opposite sides of the pin.  These facets
12 generally extend about 1/3 to 1/2 the length of the pin, leaving a
circular portion 14 extending the remaining length.  A contact
section 16 also extends along each side of the pin at the full
diameter of the circular pin from which the diamond pin is made.

      Referring to Fig. 3, a typical application of a diamond dowel
pin 10 is in providing the alignment of mating parts 18 and 20, along
with a circular dowel pin 22.  These pins 10 and 22 are first pressed
into holes 24 of part 18.  Then part 20 is brought into place, with
the pins engaging holes 26.  Diamond dowel pin 10 is oriented so that
contact surfaces 16 are aligned along a line 28 extending
perpendicular to a line 30 between the two holes 24.  Since there is
no need to provide additional clearance to allow assembly despite
variations in the distance between holes 24 and in the distance
between holes 26, both the outer surface of circular dowel pin 22 and
the contact surfaces 16 of diamond dowel pin 10 can fit tightly into
holes 26...