A scissor jack

B - Operations – Transporting – 66 – F

Patent

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Details

B66F 3/12 (2006.01)

Patent

CA 2632072

The invention involves a scissor jack (1) having four arms (4,5,6,7) hingedly arranged to provide two opposite elbows (8) between a base (2) and a load support (3). A pair of trunnions (9,10) at the elbows (8) is connected by a threaded shaft (12). A movable brace (40) is supported between the arms (4-7). The brace (40) strengthens and adds support to the jack assembly (1). In a preferred embodiment, the brace (40) includes a guide assembly (30) which slidably engages the shaft (12) and connectors (41) pivoted between the guide (30) and each of the four arms (4,5,6,7). The connectors (41) are extensible socket (36) and rod (29) arrangements. Each connector (41) includes a coil spring (37) located over the rod (29) in the socket (36). The four springs (37) are compressed on extension of the jack (1) to assist in lifting a load.

La présente invention concerne un vérin télescopique qui possède quatre bras agencés de façon articulée pour fournir deux coudes opposés entre une base et un support de charge. Une paire de tourillons au niveau des coudes est reliée par un arbre fileté. Une console mobile est supportée entre les bras. La console renforce et accentue le support à l'assemblage de vérin. Dans un mode de réalisation préféré, la console comprend un assemblage de guidage qui entre en prise de façon coulissante avec l'arbre et des connecteurs pivotant entre le guidage et chacun des quatre bras. Les connecteurs sont des agencements extensibles de douille et tige. Chaque connecteur comprend un ressort hélicoïdal positionné sur la tige dans la douille. Les quatre ressorts sont comprimés lors de l'extension du vérin pour aider à lever une charge.

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