improved door latch mechanism to secure the door 12 in the closed and latched position the latch cylinder 16 is actuated to retract the extendable rod 17 to the retracted configuration and to thereby pivot the latch member 22 from the retracted position shown in fig2 to the engaged position shown position shown in fig3 in the engaged position it can be seen that the keeper 21 of the latch member 22 is engaged with the latch post 30 it will be further noted that the keeper 21 of the latch member 22 engages the latch post 30 in opposition to the static latch members 20 on the door 12 this opposing relationship stabilizes the door 12 in the securely closed position maintaining fluid pressure on the latch cylinder 16 to bias the latch cylinder 16 and the latch member 22 coupled thereto to the latched position shown in fig3 will maintain the latch post 30 in a position trapped intermediate the keeper 21 of the latch member 22 on a first side and the static latch member 20 of the door 12 on the second and opposite side of the latch post 30 fig4 is a perspective view of the power tong body 10 the door 12 and the improved latch mechanism of the door 12 in between the open position illustrated in fig1 and the closed position illustrated in fig2 and 3 it will be noted that the door cylinder 16 remains in the extended mode with the extendable rod 17 in an extended position to distance the second end 25 from the door cylinder 16 and to position the keeper 21 in the retracted position to allow the latch post.