The disclosure relates to portable staircases having a staircase assembly including an outer staircase and an inner staircase that can move in a telescoping relationship with respect to the outer staircase. Portable staircases of the disclosure are particularly useful for accessing an oil drilling rig as they are independently supported with respect to the drilling rig, thus providing numerous safety improvements and advantages. Methods of using the portable staircases of the disclosure are also disclosed.

The disclosure relates to portable staircases having a staircase assembly including an outer staircase and an inner staircase that can move in a telescoping relationship with respect to the outer staircase. Portable staircases of the disclosure are particularly useful for accessing an oil drilling rig as they are independently supported with respect to the drilling rig, thus providing numerous safety improvements and advantages. Methods of using the portable staircases of the disclosure are also disclosed.

A convertible ramp system facilitates transfer of personnel between spaced elevations. The ramp system includes a deck assembly, a convertible main ramp, and a convertible extension ramp. The convertible main ramp has a proximal end hinged to the deck assembly and a distal end adapted for being mechanically lifted and lowered relative to the deck assembly. Both the main ramp and the extension ramp incorporates an adjustable frame assembly and a series of simultaneously articulating foot treads carried by the frame assembly. The ramps are selectively convertible between a stairway configuration and a substantially flat and continuous runway configuration.

A convertible ramp system facilitates transfer of personnel between spaced elevations. The ramp system includes a deck assembly, a convertible main ramp, and a convertible extension ramp. The convertible main ramp has a proximal end hinged to the deck assembly and a distal end adapted for being mechanically lifted and lowered relative to the deck assembly. Both the main ramp and the extension ramp incorporates an adjustable frame assembly and a series of simultaneously articulating foot treads carried by the frame assembly. The ramps are selectively convertible between a stairway configuration and a substantially flat and continuous runway configuration.

Systems are provided for storing and retrieving objects such as ladders. The systems can include a carriage, and a trolley mounted on the carriage for holding the object and moving the object linearly in relation to the carriage, so that the object can be stowed in locations such as on the roof of a fire engine or other emergency vehicle, or the roof of a stationary structure. The systems can further include a handle assembly that permits a user to move the trolley while the user is standing on the ground. The handle system is configured to secure the trolley in a stowed position, and allows the user to release the carriage from its stowed position.

An access control system for an excavator access system has a ladder control lever connected to a hydraulic system of the access system. The lever has an up position which raises the ladder, a down position which lowers the ladder and a neutral position. The lever returns itself to the neutral position. The control system has a latching control circuit comprising a ladder valve contact switch operably coupled to the ladder control lever; a ladder position sensor which detects if the retractable ladder is in the raised position and a latching valve relay controlling a latching valve which controls the hydraulic cylinder. The control system controls the hydraulic cylinder to keep the retractable ladder in the raised position when the ladder valve contact switch indicates that the ladder control lever is in the neutral position and the ladder position sensor detects that the retractable ladder is in the raised position.

A telescopic ladder system includes a lower base configured to be connected to a ladder-supporting portion of a vehicle, and a ladder including a base section and a fly section operatively connected to the base section and slidable relative thereto. A supporting member is disposed at a distal end of the fly section. A security railing is connected to the distal end. The ladder has an attachment point for attaching a safety line thereto. The attachment point is disposed at one of the fly section, the supporting member and the security railing. A first actuator selectively sets an inclination angle of the ladder relative to the lower base. A second actuator selectively extends the ladder by sliding the fly section relative to the base section. A safety system and a method for securing an operator atop a vehicle or van are also contemplated.

A telescopic ladder system includes a lower base configured to be connected to a ladder-supporting portion of a vehicle, and a ladder including a base section and a fly section operatively connected to the base section and slidable relative thereto. A supporting member is disposed at a distal end of the fly section. A security railing is connected to the distal end. The ladder has an attachment point for attaching a safety line thereto. The attachment point is disposed at one of the fly section, the supporting member and the security railing. A first actuator selectively sets an inclination angle of the ladder relative to the lower base. A second actuator selectively extends the ladder by sliding the fly section relative to the base section. A safety system and a method for securing an operator atop a vehicle or van are also contemplated.

The disclosure relates to portable staircases having a staircase assembly including an outer staircase and an inner staircase that can move in a telescoping relationship with respect to the outer staircase. Portable staircases of the disclosure are particularly useful for accessing an oil drilling rig as they are independently supported with respect to the drilling rig, thus providing numerous safety improvements and advantages. Methods of using the portable staircases of the disclosure are also disclosed.

The disclosure relates to portable staircases having a staircase assembly including an outer staircase and an inner staircase that can move in a telescoping relationship with respect to the outer staircase. Portable staircases of the disclosure are particularly useful for accessing an oil drilling rig as they are independently supported with respect to the drilling rig, thus providing numerous safety improvements and advantages. Methods of using the portable staircases of the disclosure are also disclosed.