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:
May. 22, 2001
Filed:
Dec. 31, 1998
John Allan Boyden, Fenton, MI (US);
Dale Przybylowicz, Fenton, MI (US);
Allor Manufacturing, Inc., Brighton, MI (US);
Abstract
A spacer for use in maintaining inner and outer concrete form walls at a specified uniform spacing. The spacer includes a screw shaft having a right hand threaded portion and a left hand threaded portion; a first nut threadably mounted on the left hand threaded portion; a second nut threadably mounted on the right hand threaded portion; a first spacer plate secured to and extending downwardly from the first nut; a second spacer plate secured to and extending downwardly from the second nut; and a stabilizer and stiffener assembly including a male guide structure secured to the first nut and including a rod extending generally parallel to the screw shaft and a female guide structure secured to the second nut and defining a socket telescopically receiving the free end of the rod. Turning movement of the shaft varies the axial spacing between the first and second spacer plates to establish and maintain a desired spacing between the inner and outer form walls while the telescopic receipt of the rod in the socket precludes relative rotation between the first and second nuts and further acts in coaction with the parallel shaft to stiffen the overall assembly so as to avoid buckling of the screw shaft as the spacer plates are moved outwardly to spread the form walls or inwardly to squeeze the form walls together.