# US 2026/0097948 A1 · Step apparatus for lift device with extendable rail > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0097948 A1 - Document ID: US20260097948A1 - Status: Published application - Kind: A1 - Application number: 19/351,163 - Filed: 2025-10-06 - Published: 2026-04-09 - Earliest claimed: 2024-10-07 - Assignees: Oshkosh Corporation - Applicants: Oshkosh Corporation - Inventors: Devin Rosencrance - Web page: https://patentgrep.com/patent/US20260097948A1 ## CPC - B66F 17/006: {for working platforms} - B60R 3/02: Retractable steps {or ladders, e.g. movable under shock (B60R3/005 takes precedence)} - B60S 9/02: for only lifting or supporting - B66F 11/042: {actuated by lazy-tongs mechanisms or articulated levers} - B66F 11/046: {of the telescoping type} - B66F 13/00: Common constructional features or accessories - B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00) - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - B60S: SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR ## Abstract A deck apparatus for a lift device includes a frame, a deck, a member, and multiple rails. The deck is pivotally coupled with the frame. The member is coupled with the frame and is configured to translate along the frame in an upwards direction or a downwards direction. The rails are coupled to an upper end of the member. The rails define a perimeter and are coupled with the upper end of the member at a pair of corners. The rails include outer members and an extendable rail. The extendable rail includes ends configured to be received within inner volumes of the outer members. The extendable rail is configured to be extended from or retracted into the outer members to adjust a length of the perimeter of the rails. ## Claims ### Claim 1 A deck apparatus for a lift device, the deck apparatus comprising: a frame; a deck pivotally coupled with the frame; a member coupled with the frame and configured to translate along the frame in an upwards direction or a downwards direction; a plurality of rails coupled to an upper end of the member, the plurality of rails defining a perimeter and coupled with the upper end of the member at a pair of corners, wherein the plurality of rails comprise: outer members; and an extendable rail comprising ends configured to be received within inner volumes of the outer members, the extendable rail configured to be extended from or retracted into the outer members to adjust a length of the perimeter of the plurality of rails. ### Claim 2 (depends on 1) The deck apparatus of claim 1, wherein the extendable rail comprises a pivotal member hingedly coupled with a first portion of the extendable rail, the pivotal member configured to be pivoted between a closed position in which a free end of the pivotal member engages a second portion of the extendable rail and an open position in which the free end of the pivotal member does not engage the second portion of the extendable rail. ### Claim 3 (depends on 2) The deck apparatus of claim 2, further comprising a pin configured to couple the free end of the pivotal member with the second portion of the extendable rail. ### Claim 4 (depends on 1) The deck apparatus of claim 1, further comprising: a cable configured to operably couple the deck with the member; and a cylinder coupled with the frame and the member; wherein the deck is pivotable between a stowed position and a deployed position, wherein pivoting of the deck from the stowed position to the deployed position drives translation of the member along the frame in the upwards direction. ### Claim 5 (depends on 4) The deck apparatus of claim 4, wherein the member comprises a body extending in the upwards direction and a plurality of rails extending in a plane that is substantially perpendicular with the upwards direction. ### Claim 6 (depends on 4) The deck apparatus of claim 4, wherein the cylinder is configured to bias the member in the downwards direction and the deck into the stowed position. ### Claim 7 (depends on 4) The deck apparatus of claim 4, wherein the deck apparatus is an end of a platform assembly of the lift device. ### Claim 8 (depends on 4) The deck apparatus of claim 4, wherein the deck apparatus is coupled to a plurality of rails at an end of a platform assembly of the lift device. ### Claim 9 (depends on 4) The deck apparatus of claim 4, further comprising a pulley, wherein the pulley is rotatably coupled with the frame and the cable is received within a groove of the pulley. ### Claim 10 (depends on 4) The deck apparatus of claim 4, further comprising a housing disposed on a first side of the frame, the deck protruding from a second side of the frame, wherein the housing and the frame define a space therebetween within which the member is positioned. ### Claim 11 (depends on 4) The deck apparatus of claim 4, further comprising a pin, the pin configured to be inserted into an opening in the frame and one of a plurality of openings formed in the member to lock the member at an upper or a lower position relative to the frame. ### Claim 12 A lift vehicle, comprising: a chassis; a lift apparatus coupled with the chassis; a platform assembly coupled with the lift apparatus; and a deck apparatus coupled to the platform assembly, the deck apparatus comprising: a frame; a deck pivotally coupled with the frame; a member coupled with the frame and configured to translate along the frame in an upwards direction or a downwards direction; a plurality of rails coupled to an upper end of the member, the plurality of rails defining a perimeter and coupled with the upper end of the member at a pair of corners, wherein the plurality of rails comprise: outer members; and an extendable rail comprising ends configured to be received within inner volumes of the outer members, the extendable rail configured to be extended from or retracted into the outer members to adjust a length of the perimeter of the plurality of rails. ### Claim 13 (depends on 12) The lift vehicle of claim 12, wherein the extendable rail comprises a pivotal member hingedly coupled with a first portion of the extendable rail, the pivotal member configured to be pivoted between a closed position in which a free end of the pivotal member engages a second portion of the extendable rail and an open position in which the free end of the pivotal member does not engage the second portion of the extendable rail. ### Claim 14 (depends on 13) The lift vehicle of claim 13, wherein the deck apparatus further comprises a pin configured to couple the free end of the pivotal member with the second portion of the extendable rail. ### Claim 15 (depends on 12) The lift vehicle of claim 12, wherein the deck apparatus further comprises: a cable configured to operably couple the deck with the member; and a cylinder coupled with the frame and the member; wherein the deck is pivotable between a stowed position and a deployed position, wherein pivoting of the deck from the stowed position to the deployed position drives translation of the member along the frame in the upwards direction. ### Claim 16 A platform assembly for a lift vehicle, the platform assembly comprising: a base; and a deck apparatus, comprising: a frame; a deck pivotally coupled with the frame; a member coupled with the frame and configured to translate along the frame in an upwards direction or a downwards direction; a plurality of rails coupled to an upper end of the member, the plurality of rails defining a perimeter and coupled with the upper end of the member at a pair of corners, wherein the plurality of rails comprise: outer members; and an extendable rail comprising ends configured to be received within inner volumes of the outer members, the extendable rail configured to be extended from or retracted into the outer members to adjust a length of the perimeter of the plurality of rails. ### Claim 17 (depends on 16) The platform assembly of claim 16, wherein the extendable rail comprises a pivotal member hingedly coupled with a first portion of the extendable rail, the pivotal member configured to be pivoted between a closed position in which a free end of the pivotal member engages a second portion of the extendable rail and an open position in which the free end of the pivotal member does not engage the second portion of the extendable rail. ### Claim 18 (depends on 17) The platform assembly of claim 17, further comprising a pin configured to couple the free end of the pivotal member with the second portion of the extendable rail. ### Claim 19 (depends on 16) The platform assembly of claim 16, further comprising: a cable configured to operably couple the deck with the member; and a cylinder coupled with the frame and the member; wherein the deck is pivotable between a stowed position and a deployed position, wherein pivoting of the deck from the stowed position to the deployed position drives translation of the member along the frame in the upwards direction. ### Claim 20 (depends on 16) The platform assembly of claim 16, wherein the extendable rail is positioned above a fixed rail of the platform assembly, the extendable rail extending in a direction parallel with the fixed rail.