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US 2002/0157900 A1Published application
Foldable scaffold device
OwnerTatsuo Onoinventor
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OwnerTatsuo Onoinventor
Estimating the term…
An erectable and transportable scaffold device adapted to be engaged on and supported on a support beam comprises front and rear frame structures which are pivotally interconnected by means of parallel side braces which are connected between the frame structures. A scaffold plate is pivotally connected to the lower ends of each of the front and rear frames. And the front frame is pivotal outwardly from the rear structure to form a cage within the front and rear structures and the side braces having a floor formed by a scaffold plate. The plate has upright bottom edges which fit flush against the insides of an angle member forming the sides of the front frame structure so that it facilitates the holding of the structure in an erected cage forming position. A flexible or foldable member such as a chain or so is connected between the upper ends of each side of the front structure to the upper ends of each side of the rear structure. The rear structure also carries a rotatable hinge or an universal joint connected to a bolt having a front pawl and a rear pawl which is slidable therealong and which may be engaged against a support structure such as an I-beam by threading a wing nut onto the bolt behind said rear pawl to lock it in position.
An erectable and transportable scaffold device adapted to be engaged upon and supported on a support beam, comprising a rear frame structure, means on said rear frame structure for securing said rear frame structure to the support beam, a front frame structure shorter than said rear frame structure, a plurality of lateral braces arranged in vertically spaced parallel relationship and pivotally connected at their respective ends to the respective said rear frame structure and said front frame structure, a scaffold plate forming a scaffold floor pivotally connected to each side of said rear frame structure and said front frame structure adjacent the bottom ends thereof, a link member connected between the tops of corresponding respective ends of said rear and front frame structures and supporting said front frame structure in an erected position spaced outwardly from said rear frame structure and also in a collapsed position with said front frame juxtaposed, in respect to said rear frame, in an erected position said front and rear frame structures and said side braces defining a cage therewithin, and a rotatable guide member connected to a bolt having a front pawl and a rear pawl which is slidable therealong and which may be engaged against a support structure such as an I-beam by threading a wing nut onto the bolt behind said rear pawl to lock in position, and wherein said rear structure carries said rotatable guide member.
An erectable and transportable scaffold device adapted to be engaged upon and supported on a support beam, comprising a rear frame structure, means on said rear frame structure for securing said rear frame structure to the support beam, a front frame structure shorter than said rear frame structure, a plurality of lateral braces arranged in vertically spaced parallel relationship and pivotally connected at their respective ends to the respective said rear frame structure and said front frame structure, a scaffold plate forming a scaffold floor pivotally connected to each side of said rear frame structure and said front frame structure adjacent the bottom ends thereof, a link member connected between the tops of corresponding respective ends of said rear and front frame structures and supporting said front frame structure in an erected position spaced outwardly from said rear frame structure and also in a collapsed position with said front frame juxtaposed, in respect to said rear frame, in an erected position said front and rear frame structures and said side braces defining a cage therewithin, and a rotatable hinge connected to a bolt having a front pawl and a rear pawl which is slidable therealong and which may be engaged against a support structure such as an I-beam by threading a wing nut onto the bolt behind said rear pawl to lock in position, and wherein said rear structure carries said rotatable hinge.
An erectable and transportable scaffold device adapted to be engaged upon and supported on a support beam, comprising a rear frame structure, means on said rear frame structure for securing said rear frame structure to the support beam, a front frame structure shorter than said rear frame structure, a plurality of lateral braces arranged in vertically spaced parallel relationship and pivotally connected at their respective ends to the respective said rear frame structure and said front frame structure, a scaffold plate forming a scaffold floor pivotally connected to each side of said rear frame structure and said front frame structure adjacent the bottom ends thereof, a link member connected between the tops of corresponding respective ends of said rear and front frame structures and supporting said front frame structure in an erected position spaced outwardly from said rear frame structure and also in a collapsed position with said front frame juxtaposed, in respect to said rear frame, in an erected position said front and rear frame structures and said side braces defining a cage therewithin, and an universal joint connected to a bolt having a front pawl and a rear pawl which is slidable therealong and which may be engaged against a support structure such as an I-beam by threading a wing nut onto the bolt behind said rear pawl to lock in position, and wherein said rear structure carries said rotatable universal joint.
Dependencies are inferred from the claim text.