Fulcrum pry bar
A fulcrum prybar includes a shaft portion extending along a first axis, a curved prying portion affixed to a first end of the shaft portion, and a fulcrum portion affixed to the curved prying portion. The fulcrum portion includes two rectangular portions fused together to form an obtuse angle or a right angle cross section. One of the two rectangular portions is oriented such that it is flush with a horizontal surface while the prybar has partially raised an object from the same or another horizontal surface.
1. A prybar, comprising:
a shaft portion extending along a first axis;
a prying portion affixed to a first end of the shaft portion, wherein the prying portion curves away from the first axis and toward a third axis, wherein the third axis is perpendicular to the first axis;
a fulcrum portion affixed to the prying portion, wherein the fulcrum portion comprises:
a first rectangular portion; and
a second rectangular portion,
wherein a first edge of the first rectangular portion is affixed to a second edge of the second rectangular portion, wherein the first edge is affixed to the second edge such that a cross section of the first and second rectangular portions forms an obtuse or right angle,
wherein a third edge of the first rectangular portion opposite the first edge is affixed to the prying portion at a first location,
wherein a fourth edge of the second rectangular portion opposite the second edge is affixed to the prying portion at a second location, wherein the first location is closer to a distal end of the prying portion than the second location,
wherein the fulcrum portion is affixed to the prying portion such that a triangular cavity is formed between the fulcrum portion and the prying portion, and
wherein the first and second rectangular portions extend along a second axis farther than the prying portion extends along the second axis, wherein the second axis is perpendicular to the first axis and the third axis, and wherein the first, second, third and fourth edges are oriented along the second axis.
2. The prybar of claim 1 ,
wherein the first rectangular portion is oriented such that it is flush with a horizontal surface while the prybar has partially raised an object.
3. The prybar of claim 1 ,
wherein the first and second edges meet along a line that is positioned to contact the ground during operation of the prybar for a portion of a range of motion to lift an object.
4. The prybar of claim 1 ,
wherein the prying portion comprises a single bend,
wherein the single bend causes the distal end of the prying portion to bend away from the first axis and toward the third axis.
5. The prybar of claim 1 , further comprising:
a handle affixed to the shaft portion proximate to the prying portion, wherein the handle extends along the second axis.
6. The prybar of claim 1 ,
wherein the first, second, third and fourth edges are oriented along the second axis.
7. The prybar of claim 1 ,
wherein the prying portion comprises a notch centered in the distal end of the prying portion.
8. The prybar of claim 1 ,
wherein the prybar is composed of steel or cast iron, and
wherein the prying portion is welded to the first end of the shaft portion and the fulcrum portion is welded to the prying portion.
9. The prybar of claim 1 ,
wherein the third edge of the first rectangular portion is oriented to serve as a first pivot axis for a first portion of a range of motion of the prybar while lifting an object, and
wherein a line joining the first edge of the first rectangular portion and the second edge of the second rectangular portion is oriented to serve as a second pivot axis for a second portion of the range of motion of the prybar, and
wherein the second portion of the range of motion is higher than the first portion of the range of motion.
10. The prybar of claim 9 ,
wherein a lever arm of the prybar is higher when the third edge serves as the first pivot axis than when the line joining the first and second edges serves as the second pivot axis.
11. A prybar head configured for attachment to a prybar shaft, the prybar head comprising:
a prying portion configured to attach to the prybar shaft, wherein the prybar shaft extends along a first axis, and wherein the prying portion curves away from the first axis and toward a third axis, wherein the third axis is perpendicular to the first axis;
a fulcrum portion affixed to the prying portion, wherein the fulcrum portion comprises:
a first rectangular portion; and
a second rectangular portion,
wherein a first edge of the first rectangular portion is affixed to a second edge of the second rectangular portion, wherein the first edge is affixed to the second edge such that a cross section of the first and second rectangular portions forms an obtuse or right angle,
wherein a third edge of the first rectangular portion opposite the first edge is affixed to the prying portion at a first location,
wherein a fourth edge of the second rectangular portion opposite the second edge is affixed to the prying portion at a second location, wherein the first location is closer to a distal end of the prying portion than the second location,
wherein the fulcrum portion is affixed to the prying portion such that a triangular cavity is formed between the fulcrum portion and the prying portion, and
wherein the first and second rectangular portions extend along a second axis farther than the prying portion extends along the second axis, wherein the second axis is perpendicular to the first axis and the third axis, and wherein the first, second, third and fourth edges are oriented along the second axis.
12. The prybar head of claim 11 ,
wherein the prying portion comprises a single bend,
wherein the single bend causes the distal end of the prying portion to bend away from the first axis and toward the third axis.
13. The prybar head of claim 11 ,
wherein the first rectangular portion is oriented such that it is flush with a horizontal surface while attached to the prybar shaft when the prybar head has partially raised an object.
14. The prybar head of claim 11 ,
wherein, while attached to the prybar shaft, the first and second edges meet along a line that is positioned to contact the ground during operation of the prybar shaft for a portion of a range of motion to lift an object.
15. The prybar head of claim 11 ,
wherein the prybar head is composed of steel or cast iron, and
wherein the fulcrum portion is welded to the prying portion.
16. The prybar head of claim 11 ,
wherein, when the prybar head is attached to the prybar shaft:
the third edge of the first rectangular portion is oriented to serve as a first pivot axis for a first portion of a range of motion of the prybar shaft while lifting an object, and
wherein a line joining the first edge of the first rectangular portion and the second edge of the second rectangular portion is oriented to serve as a second pivot axis for a second portion of the range of motion of the prybar shaft, and
wherein the second portion of the range of motion is higher than the first portion of the range of motion.
17. The prybar head of claim 16 ,
wherein, when the prybar head is attached to the prybar shaft, a lever arm of the prybar shaft is higher when the third edge serves as the first pivot axis than when the line joining the first and second edges serves as the second pivot axis.
18. A prybar head configured for attachment to a prybar shaft, the prybar head comprising:
a prying portion configured to attach to the prybar shaft, wherein the prybar shaft extends along a first axis, wherein the prying portion curves away from the first axis and toward a third axis, wherein the third axis is perpendicular to the first axis;
a fulcrum portion affixed to the prying portion, wherein the fulcrum portion comprises:
a first rectangular portion; and
a second rectangular portion,
wherein a first edge of the first rectangular portion is affixed to a second edge of the second rectangular portion, wherein the first edge is affixed to the second edge such that a cross section of the first and second rectangular portions forms an obtuse or right angle,
wherein a third edge of the first rectangular portion opposite the first edge is affixed to the prying portion at a first location,
wherein a fourth edge of the second rectangular portion opposite the second edge is affixed to the prying portion at a second location, wherein the first location is closer to a distal end of the prying portion than the second location,
wherein the fulcrum portion is affixed to the prying portion such that a triangular cavity is formed between the fulcrum portion and the prying portion, and
wherein the first and second rectangular portions extend along a second axis farther than the prying portion extends along the second axis, wherein the second axis is perpendicular to the first axis and the third axis, and wherein the first, second, third and fourth edges are oriented along the second axis.
19. The prybar head of claim 18 ,
wherein the prying portion comprises a single bend,
wherein the single bend causes the distal end of the prying portion to bend away from the first axis and toward the third axis.