Lift device and corresponding scissor linkage

A scissor lift system comprising:

• a scissor linkage including first and second links having first and second ends connected to a base, and including third and fourth links having third and fourth ends connected to a platform, wherein (i) center regions of the first and second links are rotatably attached to each other via a first pivot, (ii) center regions of the third and fourth links are rotatably attached to each other via a second pivot, (iii) the first and second pivots are aligned along an axis, (iv) the first end and the third end are disposed laterally outward from the axis in a first direction, (v) the second end and the fourth end are disposed laterally outward from the axis in a second direction opposite to the first direction;
• and
• a stabilizing link having fifth and sixth ends, wherein (i) the fifth end is connected to the base laterally outward from the axis in the first direction, (ii) the sixth end is connected to the second link laterally outward from the axis in the second direction, and (iii) the stabilizing link is operable to restrict movement of the platform relative to the base via the scissor linkage to a single direction.

A linkage system comprising:

• primary links interconnected with each other, wherein (i) end regions of first and second links of the primary links are configured to connect to a base, (ii) center regions of the first and second links are rotatably attached to each other via a pivot, and (iii) end regions of third and fourth links of the primary links are configured to connect to a platform such that the platform is configured to move relative to the base via the primary links;
• and
• a secondary link having first and second ends, wherein (i) the first end of the secondary link is configured to connect to the base proximal to the end region of the first link, (ii) the secondary link extends from the end region of the first link, toward the second link, and laterally beyond the pivot such that the pivot is disposed laterally between the first and second ends of the secondary link, (iii) the second end of the secondary link is connected to the second link, and (iv) the secondary link is operable to bias movement of the platform relative to the base via the plurality interconnected of links to a single direction.