Abstract: A machine (A) includes a frame (16) and a platform (58) on which a boom assembly (B) is mounted. Two arms (332) of a U-shaped pivotal member (330) are pivotably mounted to the frame (16) about a first pivot axis (380) perpendicular to a longitudinal direction of the frame (16). A front end (302) of a mounting plate (310) is pivotably connected to an intermediate section (336) of the pivotal member (330) about a second pivot axis (382) perpendicular to and spaced from the first pivot axis (380). Two rams (400) are mounted on opposite sides of a rear end (304) of the mounting plate (310). Each ram (400) includes a lower end (404) pivotably connected to the frame (16) and an upper end (402) pivotably connected to one of the sides of the mounting plate (310). The boom assembly (B), the mounting plate (310), and the pivotal member (330) pivot about the first pivot axis (380) and/or the second pivot axis (382) relative to the frame (16) due to relative movement of the rams (400).

Abstract: A machine (A) includes a frame (16) and a platform (58) on which a boom assembly (B) is mounted. Two arms (332) of a U-shaped pivotal member (330) are pivotably mounted to the frame (16) about a first pivot axis (380) perpendicular to a longitudinal direction of the frame (16). A front end (302) of a mounting plate (310) is pivotably connected to an intermediate section (336) of the pivotal member (330) about a second pivot axis (382) perpendicular to and spaced from the pivot axis (380). Two rams (400) are mounted on opposite sides of a rear end (304) of the mounting plate (310). Each ram (400) includes a lower end (404) pivotably connected to the frame (16) and an upper end (402) pivotably connected to one of the sides of the mounting plate (310). The boom assembly (B), the mounting plate (310), and the pivotal member (330) pivot about the first pivot axis (380) and/or the second pivot axis (382) relative to the frame (16) due to relative movement of the rams (400).

Abstract: A retractable step assembly (400) for a cab (C) for a mobile machine includes a leg (450) slideably received in a through-hole (408) in a platform (58) of a cab (C). An upper end (452) of the leg (450) is fixed to a lower end (434) of a stretchable spring (430) whose upper end (432) is fixed. A step (470) is mounted to the lower end (454) of the leg (450). The leg (450) is movable between a retracted position and an extended position in which the step (470) is nearer to the ground than in the retracted position. The step (470) can be stepped on by an operator to move the leg (450) to the extended position to thereby allow the operator to exit the cab (C) by stepping on the step (470). The leg (450) can be unlatched by the operator in the cab (C) to return to the retracted position under action of the spring (430).

Abstract: A retractable step assembly (400) for a cab (C) for a mobile machine includes a leg (450) slideably received in a through-hole (408) in a platform (58) of a cab (C). An upper end (452) of the leg (450) is fixed to a lower end (434) of a stretchable spring (430) whose upper end (432) is fixed. A step (470) is mounted to the lower end (454) of the leg (450). The leg (450) is movable between a retracted position and an extended position in which the step (470) is nearer to the ground than in the retracted position. The step (470) can be stepped on by an operator to move the leg (450) to the extended position to thereby allow the operator to exit the cab (C) by stepping on the step (470). The leg (450) can be unlatched by the operator in the cab (C) to return to the retracted position under action of the spring (430).