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:
Jul. 15, 1997
Filed:
May. 09, 1996
A Caner Demirdogen, Cookeville, TN (US);
Paul D Miller, Cookeville, TN (US);
Fleetguard, Inc., Nashville, TN (US);
Abstract
A threaded fastener which is constructed to be turned in one direction by a square socket drive includes a threaded stem and an integral modified head arranged with four raised projections which are circumferentially spaced. Each of the four raised projections includes a substantially flat wall portion and a curved and inclined ramp portion. The four flat wall portions effectively define a square center region which is compatibly sized to receive a one-half inch square socket drive. Rotation of the square socket drive in a counterclockwise direction causes the sides of the square socket drive to engage the flat wall portions so as to turn the threaded fastener in a counterclockwise direction. Any attempt to rotate the square socket drive in a clockwise direction causes the sides of the square socket drive to ride up along the ramp portions and ride out of engagement with the modified head of the threaded fastener. In a related embodiment of the present invention, the four raised projections have their orientation reversed so that the square socket drive is effective to threadedly advance the fastener when the drive is turned in a clockwise direction. Likewise, in this alternate embodiment, when the square socket drive is turned in a counterclockwise direction, it rides up along the ramp portions and come out of engagement with the modified head. As described, the present invention includes a one directional threaded fastener which is manipulated by a square socket drive.