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:
Oct. 05, 2010
Filed:
Oct. 31, 2005
Erik Jan Ostby, Branford, CT (US);
Brian David Bourgoin, East Haddam, CT (US);
Jeffrey Mark Briggs, Madison, CT (US);
Craig Charles Tooker, East Lyme, CT (US);
Erik Jan Ostby, Branford, CT (US);
Brian David Bourgoin, East Haddam, CT (US);
Jeffrey Mark Briggs, Madison, CT (US);
Craig Charles Tooker, East Lyme, CT (US);
Roto Frank of America, Inc., Chester, CT (US);
Abstract
An improved method of cutting a helical gear sector onto a pivoting arm of a casement window is disclosed. The method includes beginning with a pre-hardened flat sheet of steel stock and cutting the arm and the helical gear sector of the arm in two steps. The non-toothed portions of the arm are cut with a laser and nitrogen assist or shielding gas to prevent any oxidation to the non-toothed portions of the structure. The helical gear sector is also cut with a laser, but using oxygen assist gas. Use of the oxygen prevents recasts slag from accumulating in the gear sector. Thus, a finished part is completed with two laser cutting operations thereby eliminating the need for separate stamping, shaping, deburring and subsequent heat treatment processes used in conventional manufacturing methods. The subsequent heat treating is eliminated because a pre-hardened steel stock may be utilized.