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:
Jan. 05, 1988
Filed:
Apr. 18, 1987
Thaddeus Zaborowski, Pembroke, MA (US);
The Schawbel Corporation, Cambridge, MA (US);
Abstract
A portable solder iron includes a hollow barrel having a free tapered end; first and second burners positioned in a free tapered end; a burner having separate, independently controlled gas supply paths positioned in the barrel, the supply paths including first and second tubes, each tube having a free end; a single junction tube joining together the free ends of the first and second tubes, the junction tube having a free end adajcent the tapered free end of the barrel for heating the same; a fuel supply cartridge which supplies fuel to the first and second tubes and which controls the flow of fuel from the cartridge; an ignitor assembly for igniting the fuel escaping from the free end of said junction tube; a plunger which applies a force to the valve in response to user actuation, to start fuel flow; a regulator including a diaphragm which maintains a substantially constant flow rate of fuel to the first and second tubes; a valve stem through which the fuel travels from the cartridge to the second tubes; a bimetallic element for applying a force to the valve stem to permit fuel flow to the second tube when the temperature is less than a predetermined start-up temperature and for removing such force otherwise; and a spring which applies a reverse force to the valve stem to prevent fuel flow to the second tubes when the predetermined start-up temperature is attained, so as to achieve fast heat up of the barrel.