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:
Aug. 31, 2010
Filed:
Oct. 24, 2003
Daniel James Dickinson, Arlington Heights, IL (US);
Michael Walter Smith, Lake Zurich, IL (US);
Lawrence John Conway, Des Plaines, IL (US);
Edward Sacha, Chicago, IL (US);
Paul Lester Clemens, Lake Zurich, IL (US);
Mark Fleydervish, Buffalo Grove, IL (US);
Richard H. Ducato, Pleasant Prairie, WI (US);
Eustathios Vassiliou, Newark, DE (US);
Daniel James Dickinson, Arlington Heights, IL (US);
Michael Walter Smith, Lake Zurich, IL (US);
Lawrence John Conway, Des Plaines, IL (US);
Edward Sacha, Chicago, IL (US);
Paul Lester Clemens, Lake Zurich, IL (US);
Mark Fleydervish, Buffalo Grove, IL (US);
Richard H. Ducato, Pleasant Prairie, WI (US);
Eustathios Vassiliou, Newark, DE (US);
Termax Corporation, Lake Zurich, IL (US);
Abstract
This invention relates to a spring fastener, which comprises engagement springs in opposite sides of the fastener. Each engagement spring has an engagement region comprising a hindrance portion, which increases considerably the removal to insertion force ratio as compared to such ratio in the absence of the hindrance portion, thus permitting very easy insertion with considerably more difficult removal of the fastener from the slot of a panel, which provides an efficient ergonomically balanced removal to insertion force ratio. The hindrance portion comprises ripples or other hindrance elements of unexpectedly minute dimensions for providing this efficient ergonomic force balance. The combination of the above structures with the presence of barbs being bent at their front portion improves immensely the ergonomic character of the devices.