Variable force compound cutting lopper
View Patent ↗Variable force compound gear lopper devices and methods that produce a pinching effect of the handles which comes into play only after the wood, branch, is in the jaws. Once the wood, such as a branch, is in the jaws it causes a countering force which allow the new handle arrangement to cause the frame to rotate slightly on the hook side against the work opposite the cutting blade. So, in effect there is a double compound action against the work. A true double compound pinching effect against the work from both sides of the lopper. With the old version the frame is static and the only action is from the blade side. The variable force lopper has an upper handle; a lower handle connected by a cutting head with upper and lower arms therebetween, with an upper jaw and a lower jaw; and having a slot in the lower arm for the upper jaw.
1 . A variable force compound cutting lopper, said variable force compound cutting lopper comprising:
a cutting head 36 that includes an first cutting jaw 4 and a second cutting jaw 3 that are pivotally attached to each other at a common pivot point 26 ;
the first cutting jaw 4 includes an elongated plate member having a convex curved cutting edge 32 at one end, a middle through-hole 83 , and an opposite end with a through hole 93 ;
the second cutting jaw 3 includes another elongated plate member having a concave cutting edge 24 at one end, side by side middle through-holes 85 , 103 , an opposite end, and a third through-hole 75 between the middle through-holes 85 , 103 and the opposite end;
a first handle 12 with a first arm 1 ;
a second handle 14 with a second arm 2 ;
said first cutting jaw 4 and said second cutting jaw 3 is rotational about the common pivot point 26 axis when work is placed in said first cutting jaw 4 and said second cutting jaw 3 ;
said first arm 1 having a P portion with an extended end with through-hole 107 , a through-hole 73 through the P portion, and an opposite end attached to the first handle 12 ;
the second arm 2 having a distal flat plate end with a through-hole 105 that bends to a middle plate with a slotted connector 48 and a proximate end attached to the second handle 14 ,
a bolt 72 passes into the through-hole 73 of the P portion of said first arm 1 and into the third through-hole 75 in a portion of second cutting jaw 3 fastened with nut 76 so that the first arm 1 remains fixed to the second cutting jaw 3
a first pivot 34 formed by a first bolt 82 which passes through the middle through-hole 83 in the first cutting jaw 4 and through the middle through-hole 85 in the second jaw 3 and fastened to a nut and washer 86 ;
a second pivot 46 formed by a second bolt 92 which passes into the through-hole 93 in the first cutting jaw 4 , and through the slotted connector 48 of said second arm 2 , and fastened to nut 94 ;
said common pivot point 26 formed by a bolt 102 that passes through the middle through-hole 103 in the second cutting jaw 3 , into the through-hole 105 in the second arm 2 , out the through-hole 107 in the first arm 1 , and fastened to a nut and washer 108 ; and
wherein the lopper produces a pinching effect of the first handle 12 and the said handle 14 which comes into play only after wood is placed between the first cutting jaw 4 and the second cutting jaw 3 , the placed wood causes a countering force which allow the first handle 12 and the second handle 14 to cause the concave cutting edge 24 of the second cutting jaw 3 to work opposite against the convex cutting edge 32 of the first cutting jaw 4 , forming a double compound action against the wood.
2 . The variable force compound cutting lopper as in claim 1 , wherein said slotted connector 48 is approximately one half inch wide and approximately one inch long oppositely located from said common pivot point 26 .
3 . A variable force compound cutting lopper, said variable force compound cutting lopper comprising:
a first cutting jaw 4 with a convex cutting edge 32 ;
a second cutting jaw 3 with a concave cutting edge 24 , the first cutting jaw 4 and the second cutting jaw 3 forming a cutting head 36 ;
a first handle 12 with a first arm 1 ;
a second handle 14 with a second arm 2 having a slotted connector 48 ;
a first pivot 34 formed by first bolt 82 which passes through a middle though-hole 83 in a midportion of the first cutting jaw 4 and through side through-hole 85 in a midportion of the second cutting jaw 3 and fastened to a nut and washer 86 ;
a second pivot 46 formed by a second bolt 92 which passes into though-hole 93 in an end portion of the first cutting jaw 4 , and through the slotted connector 48 of the second arm 2 , and fastened to nut 94 ;
a common pivot point 26 formed by a bolt 102 that passes through a central through-hole 103 in a midportion of the second cutting jaw 3 , into an outer through-hole 105 in the second arm 2 , out a through-hole 107 in the first arm 1 , and fastened to a nut and washer 108 ; and
wherein the lopper produces a pinching effect of the first handle 12 and the second handle 14 which comes into play only after wood is placed between the first cutting jaw 4 and the cutting jaw 3 , the placed wood causes a countering force which allow the first handle 12 and the second handle 14 to cause the concave cutting edge 24 of the second cutting jaw 3 to work opposite against the convex cutting edge 32 of the first cutting jaw 4 , forming a double compound action against the wood.
4 . The variable force compound cutting lopper as in claim 3 , wherein said slotted connector 48 is approximately one half inch wide and approximately one inch long oppositely located from said common pivot point 26 .
5 . A method of forming a pinching effect with a variable force compound cutting lopper, comprising the steps of:
providing a first cutting jaw 4 with a convex cutting edge 32 ;
providing a second cutting jaw 3 with a concave cutting edge 24 , and the first cutting jaw 3 and the second cutting jaw 4 form a cutting head 36 ;
providing a first handle 12 with a first arm 1 ;
providing a second handle 14 with a second arm 2 having a slotted connector 48 ;
forming a first pivot 34 formed by first bolt 82 which passes through a middle though-hole 83 in a midportion of the first cutting jaw 4 and through side through-hole 85 in a midportion of the second cutting jaw 3 and fastened to a nut and washer 86 ;
forming a second pivot 46 formed by a second bolt 92 which passes into though-hole 93 in an end portion of the first cutting jaw 4 , and through the slotted connector 48 of the second arm 2 , and fastened to nut 94 ;
forming a common pivot point 26 formed by a bolt 102 that passes through a central through-hole 103 in a midportion of the second cutting jaw 3 , into an outer through-hole 105 in the second arm 2 , out a through-hole 107 in the first arm 1 , and fastened to a nut and washer 108 ; and
producing a pinching effect in the lopper by the first handle 12 and the second handle 14 which comes into play only after wood is placed between the first cutting jaw 4 and the second cutting jaw 3 , the placed wood causes a countering force which allow the first handle 12 and the second handle 14 to cause the concave cutting edge 24 of the second cutting jaw 3 to work opposite against the convex cutting edge 32 of the first cutting jaw 4 , forming a double compound action against the wood.
6 . The method in claim 5 , wherein said slotted connector 48 is approximately one half inch wide and approximately one inch long oppositely located from said common pivot point 26 .