Patent ID: 11913258
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC A  E | IPC E

Claim 19:
20. The apparatus of claim 1, further comprising a projecting shaft coupled to the base portion and extending outwardly therefrom, the projecting shaft including:
an inner shaft attached to the housing;
a hollow outer shaft with a spring disposed therein, the outer shaft configured to receive the inner shaft; and
an adjustable locking latch disposed on a surface of the outer shaft, the locking latch configured to transition between a locked position in which the locking latch contacts the inner shaft so as to lock together the inner shaft and the outer shaft and an unlocked position in which the locking latch is removed from the inner shaft so as to enable the inner shaft to move independently of the outer shaft,
wherein, when the outer shaft receives the inner shaft, such that a surface of the inner shaft that is disposed inside of the outer shaft compresses the spring, the spring is configured to decompress when the locking latch is transitioned from the locked position to the unlocked position, causing longitudinal movement of the inner shaft independent of the outer shaft.