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. 04, 1991
Filed:
Jun. 30, 1989
Richard J Ernst, Palatine, IL (US);
Sigismund Paul, Palatine, IL (US);
Frederick G Sevald, Evanston, IL (US);
Marian Olma, Chicago, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A pneumatically actuatable dispenser for a two-part adhesive, as provided within a cartridge having two chambers and having a mixing nozzle mounted upto a first end, each chamber having a plunger accessible from a second end. A front frame holds the cartridge. A piston is arranged to be selectively driven within a cylinder in a forward or reverse direction. A pair of piston rods operate in tandem so as to drive the plungers toward the nozzle, when driven conjointly with the piston in the forward direction. A first valve, when actuated, delivers pressurized air from driving the piston in the forward direction. A second valve, when actuated, delivers pressurized air for driving the piston in the opposite direction. A third valve, when actuated while the first valve is actuated, vents pressurized air from the cylinder. A first control rod, which moves conjointly with the piston, and a second control rod may be selectively linked to each other for conjoint movement or unlinked from each other, by means of a linking lever and a cam. An actuator, which is adjustably positionable along the second control rod, actuates the third valve after conjoint movement of both control rods and the actuator, along with the piston, through means of a distance correlating to a controlled dose of the mixed parts of the adhesive. A fourth valve can be manually actuated so as to divert pressurized air, by means of a hose, to a nozzle for blowing water or debris from a hole which is to receive the adhesive.