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. 11, 1993
Filed:
Jan. 08, 1992
Michael R Spraggins, San Antonio, TX (US);
Other;
Abstract
A fastener system to join lightweight panels such as honeycomb or foam core panels. The fastener system comprises a unique hollow, threaded fastener pin (12) and drive assembly (18). The drive assembly (18) attaches to an electric drill and is made up of a cartridge housing (14) for carrying a disposable, dual piston (epoxy resin and hardener) cartridge (20), and a plunger assembly, clutch mounted to the cartridge housing (14). The nose (62) of the cartridge (20) is adapted to receive the proximal end of the pin (12). The plunger assembly (16) mounts to the chuck of the drill. The panels are aligned and the pin (12), mounted to the nose (62) of the cartridge housing (14), is placed against the panels at the point to be joined. The drill is activated and the pin (12) is threaded in until its flared, distal end (26) is seated flush against the skin of the panel. The torque increase on the drive assembly (18) caused by such seating disengages the clutch of the plunger assembly (16), causing rotation between the now stationary housing (14) and still rotating plunger (16), driving the plungers (80a) and (80b) into the pistons (80) of the cartridge (20) and injecting the epoxy resin and hardener through a mixing nozzle (21) into and through the hollow pin (12), into the surrounding panel to harden and lock the pin (12) and panels together.