The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 1997
Filed:
Sep. 14, 1995
William P Gundy, Milford, NH (US);
NPC, Inc., Milford, NH (US);
Abstract
An anchoring device for anchoring a threaded member such as a screw or bolt in a substrate material includes an anchoring sheath for receiving the threaded member. The anchoring sheath includes annular anchoring ribs formed around a body portion of the anchoring sheath and at least one longitudinal rib extending along at least a portion of the body portion of the anchoring sheath and extend outwardly from the anchoring sheath. In a sheath with more than one longitudinal rib, the longitudinal ribs lie in different planes which intersect at the longitudinal axis of the anchoring sheath. The anchoring sheath preferably includes top and bottom regions which have no annular or longitudinal ribs. The bottom region can have an extended length to accommodate threaded members of varying lengths and a hole providing drainage of water, ice, or other debris as the threaded member is tightened into the sheath. The top region can further include a sleeve positioned around the sheath to match the modulus of elasticity of at least the top portion of the anchoring sheath to that of the substrate, and to prevent fractures in the substrate caused by stress in the substrate. The anchoring sheath may be coated with a resilient, elastomeric layer.