Abstract: A scissor jack comprises a bracket coupled to a first upper arm and a second upper arm; a load rest positioned above the bracket and pivotally connected to the bracket; an elastic element disposed between the load rest and the bracket; a base coupled to a first lower arm and a second lower arm; a first connector pivotally connected to the first upper arm and the first lower arm; a second connector pivotally connected to the second upper arm and the second lower arm; and a driving rod drivably connected to the first and second connectors.

Abstract: A scissor jack comprises a bracket coupled to a first upper arm and a second upper arm; a load rest positioned above the bracket and pivotally connected to the bracket; an elastic element disposed between the load rest and the bracket; a base coupled to a first lower arm and a second lower arm; a first connector pivotally connected to the first upper arm and the first lower arm; a second connector pivotally connected to the second upper arm and the second lower arm; and a driving rod drivably connected to the first and second connectors.

Abstract: A scissor jack comprises a support member coupled to a first upper arm and a second upper arm; a base coupled to a first lower arm and a second lower arm; a first connector pivotally connected to the first upper arm and the first lower arm; a second connector pivotally connected to the second upper arm and the second lower arm; a lead screw fixed to the first connector; and a driving member having a first through-hole. The driving member is rotatable connected in the second connector and the lead screw is connected with the first through-hole via thread connection.

Abstract: The present invention in one or more embodiments provides a jack tool including a first shaft including a first tail with a first protrusion connected to a first spring, and a second shaft including a second head with a second aperture to detachably receive the first protrusion of the first shaft upon a force on the first spring translated from a force of different direction on the first protrusion.

Abstract: The present invention in one or more embodiments provides a jack tool including a first shaft including a first tail with a first protrusion connected to a first spring, and a second shaft including a second head with a second aperture to detachably receive the first protrusion of the first shaft upon a force on the first spring translated from a force of different direction on the first protrusion.

Abstract: According to one or more embodiments, a jack tool includes an inserting end, the inserting end including a connection insert positioned within the inserting end, the connection insert including first and second protrusions linked to be movable together. The inserting end may include a pair of spaced apart first apertures to receive the first and second protrusions, respectively.