Patent ID: 8939053
Filing Date: 2015-01-27
Classification: B26B,Y10T

Abstract:
1. A folding knife comprising: a pair of handle sides; a blade having a sharpened working end and a tang end pivotally connected between the pair of handle sides for rotational movement between an open position where the blade is extended from the pair of handle sides and a closed position where the blade is interposed between the pair of handle sides; and an assisted opening mechanism including an elongated bar spring mounted to one of the pair of handle sides and spaced parallel to the blade, and a contact pin extending from the tang of the blade configured to rotate with the blade movement from a first end position through a first intermediate range, a second intermediate range, a third intermediate range into a second end position such that the contact pin may rotate from the first end position through the first intermediate range without being biased by the elongated bar spring into engagement with the bar spring through the second intermediate range where the elongated bar spring engages the contact pin and biases the blade towards the first intermediate range, and the contact in may further rotate past an inflection point into the third intermediate range where the pin is biased towards the second end position, the contact pin forcibly engages the bar spring to hold the blade in the closed position and no other mechanism additionally holds the blade closed.