Extendable jack tool and jack assembly employing the same

A jack tool comprising:

• a shaft including a head with an aperture and a tail with a protrusion connected to a spring, wherein the tail further includes a tail body positioned between and connecting the protrusion and the spring, wherein the tail body includes a first tail-body-portion having a first slanted-surface and a second tail-body-portion having a second slanted-surface, and wherein the first slanted-surface is positioned to push the second slanted-surface to impart a force on the spring translated from a force of different direction on the protrusion, such that the shaft is releasable from a second shaft when the protrusion is released from a second aperture of the second shaft upon the force of different direction imparted on the protrusion.

A jack assembly comprising:

• a jack tool including first, second and third shafts, the first shaft including a first head with a first aperture and a first tail with a first protrusion connected to a first spring, the second shaft including a second tail with a second protrusion connected to a second spring and a second head with a second aperture to detachably receive the first tail, and the third shaft including a third head with a third aperture to detachably receive the second tail, wherein at least one of the first and second tails includes first and second tail-body-portions, and wherein a first slanted-surface of the first tail-body-portion is to push a second slanted-surface of the second tail-body-portion upon a force respectively imparted onto the at least one of the first and second springs while the force is translated from a force of different direction on the at least one of the first and second protrusions;
• and
• a jack detachably connectable to the jack tool.