HUBERTUS-Solingen - Knives for Hunting, Sports, Hobby and Job

found this the other day and was wondering what it was and what it was used for?

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Description BACKGROUND Historically, folding knives have fallen into two distinct categories, generally referred to as friction folders of the first category, or locking folders of the second category. Friction folders are typically configured in such a way as to provide a detent in both the open and closed position. The act of opening or closing such a knife often requires the user to deploy both hands in order to overcome a detent of varying degrees of resistance, while locking folders typically lock automatically upon opening. The two main options have been, that of either designing a knife more prone to the dangers of accidental closing, or that of designing a knife that requires delocking before closing, but somewhat less likely to close unintentionally. The compromise inherent in friction folding knife design, led to the development of locking folders that must be manually delocked before closing. These locking folding knives solved most of the safety considerations but introduced further complications of mechanical complexity, and in many cases, new safety considerations arising from the act of delocking, as in the case of the so called liner-locks which require the thumb to cross the path of the closing blade. The inconvenience introduced by the necessity to delock is often seen as a further disadvantage of current locking designs. OBJECTIVE The objective therefore, of the current invention is to provide for a folding knife, of a non-locking design, that overcomes the safety disadvantages of the prior art. Further advantages include ease of manufacture, by virtue of fewer and simpler parts, and a unique mechanism that allows quick and easy manipulation through both the opening and closing cycles. Reference Numbers 10 Blade 12 Handle Frame 14 Resilient Member 16 Blade Pivot Pin 18 Stop Pin 20 Flipper Spur 22 Handle Overlay 24 Traveling Link 26 Traveling Link Pivot 28 Frame Spacer 30 Traveling Link Detent Open 32 Traveling Link Detent Closed 34 Detent Roller 36 Detent Roller Axis Pin 38 Detent Roller Pocket 40 Resilient Member Fixed Anchor 42 Resilient Member Traveling 44 Frame Spacer Screws Anchor DRAWING FIGURES Drawing Sheet 1/3 shows the knife in the three stages of opening and closing, FIG. 1 shows the knife in closed position, FIG. 2 shows the same knife in the open position and FIG. 3 shows the knife at the half open position. Drawing Sheet 2/3 shows the knife in the three stages of opening and closing with all the parts shown in transparent view to illustrate their interaction. FIG. 4 shows the knife in closed position, FIG. 5 shows the knife in open position, and FIG. 6 shows the knife in mid travel between open and closed. Drawing Sheet 3/3, FIG. 7 shows a side view of handle frames front and back. FIG. 8 shows top and side view of resilient member, FIG. 9 shows top, side, and end view of frame spacer with rollers and pins, FIG. 10 shows a side view of traveling links and the portion of traveling links that serves as an open detent and closed detent. IN OPERATION Referring to FIG. 4 of sheet 2/3 the opening cycle is initiated by pressing on trigger spur 20, in the direction of arrow a. As Trigger spur 20 is made to rotate about blade pivot pin 16, traveling link 24 is forced rearward, extending resilient member 14, until reaching a point slightly past equilibrium, as shown in FIG. 6. At this point in the travel of blade 10 towards open, the resilient member 14, powers traveling link 24 in the direction of arrow c, causing blade 10 to complete it's travel to full open position as in FIG. 5. When the blade is in the full open position of FIG. 5, the blade is not locked, but the mere act of gripping the handle, which applies pressure in the direction of arrow b is sufficient to safely hold the blade in position for most practical purposes, by virtue of the engagement of detent roller 34 with traveling link detent 30. Closing of blade 10 is accomplished by simply exerting pressure on blade 10 in the direction of arrow d while holding handle frame 12 stationary. As blade 10 moves toward closing, the detent notch 30 of FIG. 11, sheet 3/3, is forced out of engagement with detent roller 36, as shown at FIG. 10. Allowing the blade 10 to return to the closed position. In order to reconfigure the non locking design (as shown) to that of a locking design (not shown), it is only necessary to alter the angle of the interface of detent 30 to prevent the escape of traveling link 24 from roller 36. When the design is a lock open configuration, the delocking cycle must be preceded by finger pressure applied to traveling link 24 at a point, and in a direction, as indicated by arrow e of FIG. 5. IN CONCLUSION As can be readily understood by a careful analysis of the foregoing the “lock optional, spring assist, folding knife” of the current invention offers substantial improvements for a folding knife. For example, even though the handle to blade interface may be non-locking, the configuration is such that the mere act of griping the handle insures that the blade will not accidentally close, resulting in injury to the operator. Furthermore it is clearly apparent that the greatly simplified means of providing for a spring assisted opening blade and the strong and easily manufactured parts, by which that objective is achieved, holds great advantage over that of the prior art.

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