Drop-in anchor for concrete structures
AssigneeMMI Management Services LP
InventorsDavid L. Kelly, Scott L. Collins
Life of this patent
Estimating the term…
Abstract
A radially expansible sleeve to provide part of a drop-in anchor for receipt in a bore formed in a concrete structure. The sleeve has arcuate protrusions with knife-like distal edges extending therearound. Upon radial expansion of the sleeve, the knife-like edges cut into the interior surface of the bore to anchor the sleeve in place.
Claims18
A drop-in anchor for insertion into a cylindrical bore formed in a concrete structure, said anchor comprising:
- a. a sleeve coaxially insertable into the bore, said sleeve being of a diameter slightly less than that of the bore and having an expansible split section;
- b. one or more arcuate protrusions formed on and extending at least partially around the split section, said protrusions being proportioned to slide into place within the bore as the sleeve is inserted thereinto and having distally disposed knife-like edges;
- c. a tapered surface formed internally of the split section;
- and
- d. a tapered plug received within the split section for movement relative to the sleeve and engagement with the tapered surface to expand the split section and force the knife-like edges into cutting engagement with the bore.
A drop-in anchor for insertion into a cylindrical bore formed in a concrete structure, said anchor comprising:
- a. a sleeve coaxially insertable into the bore, said sleeve being of a diameter slightly less than that of the bore and having a radially expansible section;
- b. one or more arcuate protrusions formed on and extending at least partially around the expansible section, said protrusions being proportioned to slide into place within the bore as the sleeve is inserted thereinto and having distally disposed knife-like edges;
- c. means to radially expand-the expansible section and force the knife-like edges into cutting engagement with the bore.
A method for providing an anchor within a bore formed in a concrete structure, said method comprising:
- a. providing a radially expansible sleeve of a diameter slightly less than that of the bore, said sleeve having one or more arcuate protrusions extending at least partially therearound with knife-like distal edges;
- b. inserting the sleeve coaxially into the bore;
- and,
- c. radially expanding the sleeve to force the knife-like edges into cutting engagement with the bore.
Dependencies are inferred from the claim text.