초록 ▼

A collapsible carrier for a heavy machine, comprising (a) an upper platform adapted to support the machine, (b) first leg structure pivotally attached to the platform and extending downwardly and forwardly relative to the platform, (c) second leg structure having upper extent located to support the

A collapsible carrier for a heavy machine, comprising (a) an upper platform adapted to support the machine, (b) first leg structure pivotally attached to the platform and extending downwardly and forwardly relative to the platform, (c) second leg structure having upper extent located to support the platform and extending downwardly and rearwardly relative to the platform, (d) the first and second leg structures pivotally interconnected below the level of said platform, (e) there being a slide surface associated with the platform and presented to transmit loading to the second leg structure upper extent as said upper extent travels therealong between first and second positions corresponding to raised and lowered positions of the platform, and there being stops associated with the platform to limit such travel at the first and second positions, (f) releasable mechanism to lock the second leg structure upper extent to the platform at the first and second positions, (g) and a counterbalance operatively connected with said first and second leg structures to yieldably resist downward movement of the platform, thereby counterbalancing the weight of the machine.

대표청구항 ▼

A collapsible carrier for a heavy machine, comprising (a) an upper platform adapted to support the machine, (b) first leg means pivotally attached to the platform and extending downwardly and forwardly relative to the platform, (c) second leg means having upper extent located to support the platform

A collapsible carrier for a heavy machine, comprising (a) an upper platform adapted to support the machine, (b) first leg means pivotally attached to the platform and extending downwardly and forwardly relative to the platform, (c) second leg means having upper extent located to support the platform and extending downwardly and rearwardly relative to the platform, (d) the first and second leg means pivotally interconnected below the level of said platform, (e) there being a slide surface associated with the platform and presented to transmit loading to said second leg means upper extent as said upper extent travels therealong between first and second positions corresponding to raised and lowered positions of the platform, and there being stops associated with the platform to limit said travel at said first and second positions, (f) releasable lock means to lock said second leg means upper extent to the platform at said second leg means first and second positions, (g) and counterbalance means operatively connected with said first and second leg means to yieldably resist downward movement of the platform, thereby counterbalancing the weight of said machine, said counterbalance means including a tension spring having an end operatively connected to said second leg means upper extent, at a location below the level of said platform, (h) said slide surface being defined by a guide plate the opposite ends of which extend downwardly and reversely with U-shape to form said stops, the guide plate downwardly open between said U-shaped ends and below said slide surface, (i) said releasable lock means including a lock element operatively engaged by the second leg means upper extent and moveable upwardly adjacent one of said U-shaped guide plate ends in said first position of the second leg means upper extent, (j) the first leg means having upper end extent pivotally attached to the platform, and also to which the counterbalance means is attached, below the level of the platform, (k) said releasable lock means comprising latch elements carried by the guide plate to move into latching position relative to said second leg means upper extent in each of said first and second positions, and being manually releasable from said latching positions to allow travel.