Dowell alignment apparatus

• US 5,618,125 A
• Filed: 10/13/1995
• Issued: 04/08/1997
• Est. Priority Date: 01/18/1994
• Status: Expired due to Term

• Current Assignee: Illinois Tool Works Inc.
• Original Assignee: Permaban North America Incorporated
• Inventors: Boxall, Russell, McPhee, Mike
• Primary Examiner(s): Knight, Anthony
• Application Number:
  US08/542,545
• Time in Patent Office: 543 Days
• Field of Search: 404/47-51, 404/60-62, 264/34, 264/35, 264/260, 264/261, 52/318, 52/393, 52/396.02, 52/396.04, 52/396.05, 52/396.07, 52/220.8, 285/3, 285/4, 403/12, 403/2, 403/13
• US Class Current: 403/12
• CPC Class Codes: E01C 11/14 Dowel assembly ; Design or construction of reinforcements in the area of joints coupling devices for prefabricated units E01C5/005; combined with characteristic packings E01C11/08 - E01C11/12; removable holders E01C23/045
• CPC Class Codes: E04B 1/483 Shear dowels to be embedded in concrete
• CPC Class Codes: F16B 2200/63 Frangible connections
• CPC Class Codes: Y10T 403/1608 Holding means or protector functioning only during transportation, assembly or disassembly

Abstract

An apparatus for positioning a dowel within a concrete slab is disclose. The apparatus comprises a substantially planar mounting flange that is used to mount the apparatus onto a wooden form, and a dowel guide that extends perpendicularly from the plane of the mounting flange.

Together, the mounting flange and the dowel guide define a dowel passage that is aligned with a corresponding hole in the wooden form. The dowel passage allows a dowel to be slipped through the apparatus and through the hole in the form, and to extend into the region where the slab is to be poured. The invention allows dowels to be properly and consistently aligned before and during the pouring of a concrete slab.

Claims

1. An apparatus for positioning a dowel within a concrete slab, formed by pouring concrete into a form, said apparatus comprising

a) a substantially planar mounting flange having an inner surface and an outer surface;

and

b) a dowel guide that extends from the mounting flange at a desired angle, the dowel guide having an inner surface and an outer surface, the inner surface of the dowel guide defining a straight dowel passage having an opening at each end, whereby the apparatus can be secured to the form and a dowel can be introduced into the dowel passage with opposite ends of the dowel extending from opposite ends of the apparatus so that the one end of the dowel may be embedded into the concrete poured into the form and the apparatus can be removed from the other end of the dowel for reuse.

2. The apparatus of claim 1, wherein the dowel passage has a square cross-section.

3. The apparatus of claim 1, wherein the dowel passage has a circular cross-section.

4. The apparatus of claim 1, wherein the dowel guide is perpendicular to the plane of the mounting flange.

6. The apparatus of claim 1, further comprising a rupturable (reputable) membrane that extends at least partially into the dowel passage from the inner surface of the dowel guide, whereby in use the dowel can be forced through the rupturable (reputable) membrane so as to extend from opposite ends of the apparatus.

7. The apparatus of claim 1, further comprising one or more spacers that extend outward from the inner surface of the mounting flange.

5. An apparatus for positioning a dowel within a concrete slab, said apparatus comprising

a) a substantially planar mounting flange having an inner surface and an outer surface;

and

b) a dowel guide that extends from the mounting flange at a desired angle, the dowel guide having an inner surface and an outer surface, the inner surface of the dowel guide defining a straight dowel passage having an opening at each end, whereby a dowel can be introduced into the dowel passage with opposite ends of the dowel extending from opposite ends of the apparatus so that the one end of the dowel may be embedded into the concrete poured into the form and the apparatus can be removed from the other end of the dowel for reuse, and further comprising a deformable ridge that extends from the inner surface of the dowel guide along the length of the dowel passage.