# US 9,750,323 B2 · Scissor lift that locks at a variable height > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,323 B2 - Document ID: US9750323B2 - Status: Granted - Kind: B2 - Application number: 15/180,097 - Filed: 2016-06-13 - Published: 2016-10-20 - Granted: 2017-09-05 - Earliest claimed: 2015-04-16 - Applicants: Aviad Berger - Inventors: Aviad Berger - Web page: https://patentgrep.com/patent/US9750323B2 ## CPC - A45C 15/00: Purses, bags, luggage or other receptacles covered by groups A45C1/00 - A45C11/00, combined with other {objects or} articles (A45C1/08, A45C3/14, {A45C11/321, A45C13/28} take precedence) - A45C 5/03: Suitcases - A45C 5/14: with built-in rolling means - A45C 13/385: {with rolling means (trunks with built-in rolling means A45C5/14)} - B62B 3/008: {having more than two axes} - B62B 3/022: {folding down the body to the wheel carriage or by retracting projecting parts (collapsible containers B65D, e.g. B65D7/24, B65D9/12, B65D11/18)} - B62B 3/0625: {using rigid mechanical lifting mechanisms, e.g. levers, cams or gears} - B66F 7/065: {Scissor linkages, i.e. X-configuration} - A45C 2009/007: {into other hand or travelling articles} - B62B 2202/24: Suit-cases, other luggage - B62B 2203/10: comprising lifting means - B62B 2205/06: Foldable with a scissor-like mechanism - B62B 2206/06: adjustable in height - A45C: PURSES; LUGGAGE; HAND CARRIED BAGS - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) - 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) ## Abstract A scissor lift for raising and lowering a heavy object, including an upper platform for supporting a heavy object, including a release mechanism, and guided rollers mounted on axles, a lower frame including guided rollers mounted on axles, a scissor lift mechanism fastened to the axles of the upper platform guided rollers and to the axles of the lower frame guided rollers, that raises and lowers the upper platform, a locking mechanism including protrusions protruding outward of the upper frame, each protrusion corresponding to a different height of the scissor lift mechanism, wherein at least one guided roller within the upper platform includes a spring-loaded pin for engagement in the protrusions, thereby locking the scissor lift mechanism into place at a height corresponding to the protrusion into which the spring-loaded pin is engaged, and a release mechanism that unlocks the scissor lift mechanism. ## Claims ### Claim 1 A scissor lift for raising and lowering a heavy object, comprising: an upper platform for supporting a heavy object, comprising guided rollers mounted on axles; a lower frame comprising guided rollers mounted on axles; a scissor lift mechanism fastened to the axles of said upper platform guided rollers and to the axles of said lower frame guided rollers, that raises and lowers said upper platform; a locking mechanism comprising protrusions protruding outward of said upper platform, each protrusion corresponding to a different height of said scissor lift mechanism, wherein at least one of the guided rollers within said upper platform comprises a spring-loaded pin for engagement in the protrusions, thereby locking said scissor lift mechanism into place at a height corresponding to the protrusion into which the spring-loaded pin is engaged; and a release mechanism that unlocks said scissor lift mechanism, comprising a shaft, outside of said upper platform, with capped pins that are bound within said protrusions and that move further into said protrusions, to disengage said spring-loaded pin from the protrusion into which said spring-loaded pin is engaged, when said shaft is pushed towards said upper platform. ### Claim 2 (depends on 1) The scissor lift of claim 1 wherein said upper platform comprises a slit through which a top portion of said scissor lift mechanism connects to the axles of said guided rollers in said upper platform. ### Claim 3 (depends on 1) The scissor lift of claim 1 wherein said release mechanism comprises a release lever that, when lifted, disengages said spring-loaded pin from the protrusion in which said spring-loaded pin is engaged, thereby unlocking said scissor lift mechanism. ### Claim 4 (depends on 3) The scissor lift of claim 3 wherein said release mechanism comprises: a first rod inside said upper platform that moves downward when said release lever is lifted; and a second rod that extends outside of said upper platform through a slit in said upper platform, and that pushes said shaft towards said upper platform when said first rod moves downward. ### Claim 5 (depends on 4) The scissor lift of claim 4 wherein said release mechanism comprises a spring-loaded slideable block with an inclined plane, wherein said first rod presses on said inclined plane when said first rod moves downward, causing said block to slide in a first direction, wherein said second rod is connected to said block, and wherein the spring load of said block causes said block to slide in a direction opposite to the first direction when said first rod ceases to press on said inclined plane. ### Claim 6 (depends on 5) The scissor lift of claim 5 wherein said second rod slides in the first direction and in the opposite direction via the slit in said upper platform. ### Claim 7 (depends on 1) The scissor lift of claim 1 wherein said release mechanism comprises a bar in a handle that, when pushed downward, disengages said spring-loaded pin from the protrusion in which said spring-loaded pin is engaged, thereby unlocking said scissor lift mechanism. ### Claim 8 (depends on 7) The scissor lift of claim 7 wherein said release mechanism comprises a rod that extends outside of said upper platform through a slit in said upper platform, and that pushes said shaft towards said upper platform when said handle bar moves downward. ### Claim 9 (depends on 8) The scissor lift of claim 8 wherein said release mechanism comprises a spring-loaded slideable block with an inclined plane, wherein said handle bar presses on said inclined plane when said handle bar moves downward, causing said block to slide in a first direction, wherein said rod is connected to said block, and wherein the spring load of said block causes said block to slide in a direction opposite to the first direction when said handle bar ceases to press on said inclined plane. ### Claim 10 (depends on 9) The scissor lift of claim 9 wherein said rod slides in the first direction and in a direction opposite to the first direction via the slit in said upper platform.