A support platform assembly is disclosed. The support platform assembly provides a level surface on which a ladder can be supported, and includes an extendable platform, a first set of legs and a second set of legs. The extendable platform includes a first plate having a flat top surface and a secon
A support platform assembly is disclosed. The support platform assembly provides a level surface on which a ladder can be supported, and includes an extendable platform, a first set of legs and a second set of legs. The extendable platform includes a first plate having a flat top surface and a second plate having a flat top surface, the second plate being slidable relative to the first plate between a retracted position and an extended position such that a length of the platform increases as the second plate slides from the retracted position to the extended position. The first set of legs are pivotably coupled to a bottom surface of the first plate, and the second set of legs are pivotably coupled to a bottom surface of the second plate, the first and second sets of legs being configured to vertically support the platform.
대표청구항▼
1. A support platform assembly for providing a level surface, the support platform assembly comprising: an extendable platform including: a first plate having a flat top surface, a first end, a second end, and two lateral edges extending between the first end and the second end, the first plate incl
1. A support platform assembly for providing a level surface, the support platform assembly comprising: an extendable platform including: a first plate having a flat top surface, a first end, a second end, and two lateral edges extending between the first end and the second end, the first plate including a bottom panel and a top panel at least partially mounted on the bottom panel, the bottom panel having a first edge and an opposite second edge, wherein the top panel is longer than the bottom panel and is affixed to the bottom panel such that a first portion of the top panel extends past the first edge of the bottom panel; anda second plate having a flat top surface, a first end, a second end, and two lateral edges extending between the first end and the second end, the second plate being slidable relative to the first plate between a retracted position and an extended position such that a length of the platform increases as the second plate slides from the retracted position to the extended position, wherein the second plate is longer than the bottom panel of the first plate and wherein the first portion of the top panel is slidably mounted on top of the second plate to cover the top surface of the second plate in the retracted position;a first set of legs pivotably coupled to a bottom surface of the first plate, each of the first set of legs being independently foldable and configured to: be folded towards the bottom surface of the first plate and arranged substantially perpendicular to the lateral edges of the first plate in a folded position; androtate from the folded position to a terminal pivot position past a vertical position, the vertical position corresponding to a position in which each of the first set of legs is generally perpendicular to the bottom surface of the first plate;a second set of legs pivotably coupled to a bottom surface of the second plate, each of the second set of legs being independently foldable and longer than a maximum length of any of the first set of legs and being configured to: be folded towards the bottom surface of the second plate and arranged non-perpendicular to the lateral edges of the second plate in a folded position; androtate from the folded position to a terminal pivot position past a vertical position, the vertical position corresponding to a position in which each of the second set of legs is generally perpendicular to the bottom surface of the second plate wherein the first and second sets of legs are configured to vertically support the platform. 2. The support platform assembly of claim 1, wherein the second plate is slidable in horizontal alignment with the first plate. 3. The support platform assembly of claim 1, wherein the second plate is configured to be locked in a fixed relative position with respect to the first plate. 4. The support platform assembly of claim 1, further comprising a pair of track members coupled to the first plate, the track members extending longitudinally along the lateral edges of the first plate and the second plate. 5. The support platform assembly of claim 4, further comprising a pair of first guide rails affixed to the top surface of the first plate adjacent to the lateral edges of the first plate, the pair of first guide rails being slidably supported on the pair of track members. 6. The support platform assembly of claim 5, further comprising a pair of second guide rails affixed to the top surface of the second plate adjacent to the lateral edges of the second plate, the pair of second guide rails being slidably supported on the pair of track members. 7. The support platform assembly of claim 1, wherein at least part of the first portion of the top panel is not mounted on top of the second plate in the extended position. 8. The support platform assembly of claim 1, wherein at least one of the first set of legs is pivotable between the folded position and the vertical position, the at least one of the first set of legs being parallel to the bottom surface of the first plate in the folded position. 9. The support platform assembly of claim 8, wherein the terminal pivot position of the at least one of the first set of legs defines an angle of rotation from the folded position that is greater than an angle of rotation associated with the vertical position. 10. The support platform assembly of claim 1, wherein at least one of the first set of legs is coupled to a first end of the bottom surface of the first plate which is furthest from the second plate. 11. The support platform assembly of claim 1, wherein at least one of the second set of legs is pivotable between the folded position and the vertical position, the at least one of the second set of legs being parallel to the bottom surface of the second plate in the folded position. 12. The support platform assembly of claim 11, wherein the terminal pivot position of the at least one of the second set of legs defines an angle of rotation from the folded position that is greater than an angle of rotation associated with the vertical position. 13. The support platform assembly of claim 1, wherein at least one of the second set of legs is coupled to a first end of the bottom surface of the second plate which is furthest from the first plate. 14. The support platform assembly of claim 1, wherein at least one of the first and second sets of legs is extendable. 15. The support platform assembly of claim 1, wherein each of the first and second sets of legs comprises a slip resistant bottom surface. 16. The support platform assembly of claim 1, further comprising, a plurality of first connector brackets secured to the bottom surface of the first plate and a plurality of second connector brackets secured to the bottom surface of the second plate, wherein each of the first set of legs is pivotably coupled to a respective one of the first connector brackets and each of the second set of legs is pivotably coupled to a respective one of the second connector brackets.
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Black, Robert David; Black, John Alexander, Access unit with variable size opening for construction application.
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