A mechanical stop (16) is used to control and/or limit spring deflection.

The mechanical bumper is actuacting at least one touch sensor if the device makes contact to an obstacle in the course of the moving device.

A remotely-adjustable, downhole fishing jar (1) of the mechanical type is used within a well bore for freeing stuck pipe or tools.

A mechanical stop (16) is used to control and/or limit spring deflection.

The stopper section (100) comprises a one-side stopper (103), a the-other-side stopper (104), an oscillatory stopper (105), an elevating/lowering stopper (106), and an auxiliary stopper (107).

A selected amount of tension to the fishing string is applied by the operator to set in a mechanical memory (11) of the jar the desired impact force.

The mechanical bumper is actuacting at least one touch sensor if the device makes contact to an obstacle in the course of the moving device.

A stopper (32) is assembled in the stopper insertion hole (31).

A custom bumper can be created using gathered bumper creation data and a bumper template.

A remotely-adjustable, downhole fishing jar (1) of the mechanical type is used within a well bore for freeing stuck pipe or tools.

In the stopper-operating component (13), a stopper shaft (44) is provided and the stopper (46) of the stopper shaft (44) alternates between being extended and being contracted by operation of the stopper-operating component (13).

What the hell?Wasn’t I just rushing to finish my mechanical blueprints before the deadline?

Wasn’t I just rushing to finish my mechanical blueprints before the deadline?

The bumper may be rotatably connected to the bumper post, wherein the bumper may be capable of wedged engagement with an entrance of the latch mechanism.

Said buffer opening is positioned co-axially on the buffer axis and a frame end opening (13) is provided on the extension of the buffer opening axis, in said frame end.