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US 4,130,178 AGranted
Elevating device
OwnerRaymond E. Smith, Jr.inventor
Life of this patent
Estimating the term…
Abstract
An elevating device is described having one or more pairs of crossed scissors members, each member having at least two telescoping sections. The scissors members are mounted for pivotal movement with respect to each other, and means are included for interconnecting opposed scissors members for effecting extension of the telescoping sections in response to the pivoting of the scissors members.
Claims16
An elevating device comprising:
- a pair of pivotable legs disposed in a scissors arrangement, each leg including a telescoping section and terminating in an end;
- means for pivoting said legs;
- and
- means interconnecting the end of each leg with the telescoping section of the opposite leg for effecting extension of said telescoping sections in response to the pivoting of said legs without imparting substantial horizontal movement to the ends of said legs.
1 more element
An elevating device comprising:
- first and second crossed scissors members pivoted for movement relative to each other and terminating in ends, each crossed scissor member including an outer sleeve and an inner shaft disposed in telescoping relationship;
- power means for effective pivoting of said first and second scissors members;
- and
- means coupling the end of each scissors member with the sleeve of the opposite scissors member for effecting telescoping between the shafts and sleeves of the respective scissors members in response to the pivoting movement of said first and second scissors members so as to vertically extend the elevating device without imparting substantial horizontal movement to the ends of said scissors members.
1 more element
An elevating device comprising:
- first and second crossed scissors members pivoted for movement relative to each other, each crossed scissors member including an outer sleeve and an inner shaft disposed in telescoping relationship;
- power means for effecting pivoting of said first and second scissors members;
- and
- means responsive to the pivoting movement of said first and second scissors members for effecting telescoping between the shafts and sleeves of the respective scissors members so as to vertically extend the elevating device,
- said means for effecting telescoping between said shaft and sleeves including a first linkage coupled between the shaft of said first scissors member and the sleeve of said second scissors member, and a second linkage coupled between the shaft of said second scissors member and the sleeve of said first scissors member.
2 more elements
An elevating device comprising:
- first and second crossed scissors members pivoted for movement relative to each other, each crossed scissors member including an outer sleeve and an inner shaft disposed in telescoping relationship,
- said first scissors member including a pair of elongated, substantially parallel, telescoping arms horizontally spaced from each other and pivotable about a common axis, each arm including an outer sleeve and an inner shaft, the shafts of said telescoping arms being joined at a common end by a first support bar extending along a substantially horizontal axis about which said first support bar is pivotable,
- said second scissors member including a single telescoping arm having an outer sleeve and an inner shaft, said second scissors member being positioned between the arms of said first scissors member and being pivotable about said common axis, the shaft thereof being connected to a second support bar extending along a horizontal axis about which said second support bar is pivotable,
- power means for effecting pivoting of said first and second scissors members;
- and
- means responsive to the pivoting movement of said first and second scissors members for effecting telescoping between the shafts and sleeves of the respective scissors members so as to vertically extend the elevating device.
3 more elements
An elevating device comprising:
- first and second crossed scissors members pivoted for movement relative to each other, each crossed scissors member including an outer sleeve and an inner shaft disposed in telescoping relationship, said first and second scissors members being pivotably connected together for pivoting movement about a common horizontal axis, and
- power means for effecting pivoting of said first and second scissors members said power means including an extendible piston coupled between an upper end of the sleeve of said first scissors member and the interconnection of said first and second scissors members such that, upon extension of said piston, said first and second scissors members pivot about the common axis.
Dependencies are inferred from the claim text.