Swing type access system for an earth mover
AssigneeBarjoh Pty Ltd
InventorNathan Ellement
Life of this patent
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Abstract
An access system (10) for an earth moving equipment (100) to allow a person to travel from ground level to an elevated position, said access system (10) includes an access means (12) mountable on to the earth moving equipment (100), and a retraction mechanism (50) to move the access means (10) between a deployed position (14) wherein a person can ascend or descend on the access means and a retracted position (16) wherein the access means (10) is stowed, and a locking means (52) moveable to an operative position wherein the locking means (52) restrains movement of the access means (10) in the retracted position (16).
Claims26
An access system for earth moving equipment to allow a person to travel from ground level to an elevated position, said access system including:
- a stair or ladder mounted by a pivot to the earth moving equipment for, in use, access to or from the earth moving equipment when the stair or ladder is in a deployed position, and
- a retraction mechanism configured to retract the stair or ladder from the deployed position, wherein a person can ascend or descend on the stair or ladder, to a retracted position, wherein the stair or ladder is stowed, the retraction mechanism including an extendible linkage element configured to transfer a retraction force from an actuator, the access system having the actuator operatively connected to the stair or ladder to cause the stair or ladder to rotate about an axis of the pivot for retraction of the stair or ladder, and
- wherein the extendible linkage element is extendible in length and includes a biasing device configured to resist said extension of the extendible linkage element, and the extendible linkage element is configured to extend in length to allow the actuator to actuate a locking arrangement to lock the stair or ladder in the retracted position.
An access system for an earth moving equipment to allow a person to travel from ground level to an elevated position, said access system including:
- a stair or ladder mountable on to the earth moving equipment, and
- a retraction mechanism configured to retract the stair or ladder from a deployed position wherein a person can ascend or descend on the stair or ladder to a retracted position wherein the stair or ladder is stowed, and the retraction mechanism including an extendible linkage element configured to transfer motion from an actuator to the stair or ladder, and wherein the extendible linkage element is connected to a locking means for restraining movement of the stair or ladder when in the retracted position, wherein the extendible linkage element is configured to extend in length against a retracting force of a biasing means to allow the locking means to move to a locking position.
An access system for an earth moving equipment to allow a person to travel from ground level to an elevated position, said access system including:
- a stair or ladder mountable on to the earth moving equipment for, in use, access to or from the earth moving equipment when the stair or ladder is in a deployed position, and a retraction mechanism configured to retract the stair or ladder from the deployed position, wherein a person can ascend or descend on the stair or ladder, to a retracted position wherein the stair or ladder is stowed, the retraction mechanism including an extendible linkage element configured to transfer a retraction force from an actuator to the stair or ladder to pivot the stair or ladder about a pivot axis, wherein the extendible linkage element is extendible in length, the access system including the actuator and a biasing means, the extendible linkage element is configured to reduce in length under influence of the biasing means configured to resist said extension of the extendible linkage element and configured to ensure release of a locking arrangement operatively connected to the actuator to allow the stair or ladder to deploy from the retracted position.
Dependencies are inferred from the claim text.