Patent ID: 6776321
Filing Date: 2004-08-17
Classification: B25C

Abstract:
A stapler comprising:a base defining a horizontal plane; a cartridge assembly coupled to the base forming a cartridge pivot axis, the cartridge assembly including a ram; and a lever arm pivotally coupled to the base at a lever pivot axis, the lever arm including a grip at an end for receiving a manual input from a user, and the lever arm being coupled to the ram at a ram input in order to provide a drive force; wherein the stapler includes an inherent force factor calculated as the horizontal distance from the lever pivot axis to the lever end divided by the horizontal distance from the lever pivot axis to the ram input, wherein the force factor is at least about 3.8, wherein when the lever arm is in a static position, the stapler includes a first vertical distance from the cartridge pivot axis to the end of the lever arm, and a second vertical distance from the cartridge pivot axis to the lever pivot axis, and wherein the ratio of the first vertical distance to the second vertical distance is less than about 1.5.