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. 02, 1992
Filed:
Jan. 08, 1991
Dennis J Denen, Columbus, OH (US);
Progenics Corporation, Columbus, OH (US);
Abstract
A recreational dart is described which includes a body portion or barrel which is hollow and within which there is provided a spring bias mass which exhibits a momentum during the flight of the dart towards a target. As the dart reaches the target and the point commences to be embedded therein, the mass slides forwardly against a retaining spring to impart its momentum to the dart somewhat in the manner of a dead blow hammer. The point of the dart is retained in a normal position aligned with the central axis of the dart body by a spring contained within the dart body. Should the point strike a non-yielding portion of a target such as a wire scoring boundary, the point will be permitted to deflect and retract rearwardly until striking a camming surface which enhances its off axis orientation and thus permits the dart to slide off of the boundary wire and enter the target to avoid 'bounce out'.