Mechanically damped pull then lift hold open rod mechanism

A hold open rod configured to selectively provide damping during particular operational movements, the hold open rod comprising:

• an inner tube coupled to an outer tube, the inner tube movable with respect to the outer tube;
• a tube stop comprising an inner lock groove arranged on an outside surface the tube stop and the tube stop is configured to prevent the inner tube from separating from the outer tube;
• a damping mechanism configured to mechanically damp a movement of the outer tube with respect to the inner tube;
• the damping mechanism comprises a damping dog and a damping collar;
• the damping collar comprises a damping groove that receives the damping dog when the damping mechanism is in a damping configuration;
• the damping collar comprises a non-damping groove that receives the damping dog when the damping mechanism is in a non-damping configuration;
• a locking mechanism comprising a locking collar and a locking dog;
• the locking collar comprising a lock groove and an unlock groove;
• the locking mechanism is configured to locate the locking dog to engage the unlock groove when the hold open rod is in an unlocked configuration;
• and
• the locking mechanism is configured to locate the locking dog to engage the lock groove and contact the inner lock groove on the outside surface the tube stop when the hold open rod is in a locked configuration.

A hold open rod configured to selectively provide damping during particular operational movements, the hold open rod comprising:

• an inner tube coupled to an outer tube, the inner tube movable within the outer tube;
• a tube stop comprising an inner lock groove arranged on an outside surface the tube stop and the tube stop is configured to prevent the inner tube from separating from the outer tube;
• a damping mechanism configured to mechanically damp a movement of the outer tube with respect to the inner tube;
• the damping mechanism comprises a damping dog and a damping collar;
• the damping collar comprises a damping groove that receives the damping dog when the damping mechanism is in a damping configuration;
• the damping collar comprises a non-damping groove that receives the damping dog when the damping mechanism is in a non-damping configuration;
• the damping collar is configured to move the damping dog from the damping configuration to the non-damping configuration;
• a locking mechanism comprising a locking collar and a locking dog;
• the locking collar comprising a lock groove and an unlock groove;
• the locking mechanism is configured to locate the locking dog to engage the unlock groove when the hold open rod is in an unlocked configuration;
• and
• the locking mechanism is configured to locate the locking dog to engage the lock groove and contact the inner lock groove on the outside surface the tube stop when the hold open rod is in a locked configuration,
• wherein the damping mechanism is configured such that in the damping configuration the damping dog is located to apply a pressure to the inner tube and damp movement of the inner tube that comprises slowing movement of the inner tube with respect to the outer tube;
• the hold open rod being configured to be attached to a door;
• wherein the hold open rod being configured such that when the hold open rod is extended, the locking dog is arranged in the lock groove, and the hold open rod is locked holding a compressive load of the door;
• and
• wherein the hold open rod being further configured such that when the door is opening/closing, the hold open rod is unlocked with the locking dog arranged in the unlock groove, and the damping mechanism is engaged with the damping dog arranged in the damping groove as the hold open rod approaches a minimum length.