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US 4,867,277 AGranted
Portable lifting device and cart
OwnerWilliam C. Sloaninventor
Life of this patent
Estimating the term…
Abstract
A portable lifting device and cart is disclosed including a base having a pantographic lifting mechanism and a platform slidably connected and supported to upstanding support members. A plurability of stabilizer legs and struts pivotably attached to the base and support members provides for stability.
Claims13
A portable lifting device and cart comprising:
- a base;
- a pair of upstanding support members extending from said base;
- two pair of wheels mounted to said base;
- a pantographic lift mechanism mounted on said base;
- a platform mounted on said lift mechanism;
- means attaching said platform to each of said upstanding support members for slidable movement over the length of said support members;
- drive means operatively connected to said lift mechanism for extending and retracting said lift mechanism to an infinite number of positions between a fully retracted position and a fully extended position;
- a plurably of stabilizer legs, each leg pivotably mounted to said base for alternative positioning at a stored position and a support position whereat said leg is disposed downwardly, angularly outwardly away from said base, said leg configured to engage an external support surface in said support position;
- at least two elongated pivotal stabilizer struts one operably connected to each of said upstanding support members for alternative positioning in a stored position and a support position whereat said strut is disposed downwardly, angularly away from said support members and away from each other, said strut having a configuration to engage the external support surface in the support position.
6 more elements
A portable lifting device and cart comprising:
- a rectangular base;
- a wheel mounted to said base proximate each corner of said base;
- two parallel upstanding tubular support members extending from one long edge of said base;
- a pantograhic linkage mechanism mounted on said base centrally between said upstanding support members;
- a rectangular work platform mounted to said linkage mechanism, said platform including two split-ring members on a long edge of said platform one slidably received around each of said upstanding support members;
- drive means for selectively moving said linkage mechanism to position said platform at an infinite number of positions between a fully retracted position and a fully extended position;
- stop means on said upstanding support members contacted by said split-ring members in the fully extended position;
- four stabilizer legs, one pivotably mounted to said base proximate each corner of said base for alternative positioning at a stored position and a support position disposed downwardly, angularly away from said base;
- and
- two elongated pivotal stabilizer struts one operably connected to each of said upstanding support members for alternative positioning at a stored position and a support position disposed downwardly, angularly away from said upstanding support members and away from each other.
7 more elements
A portable lifting device and cart comprising:
- a base;
- a pair of spaced apart, parallel upstanding support members extending from said base;
- four wheels mounted to said base, two adjacent wheels being steerable;
- a scissors-type lift mechanism mounted to said base;
- drive means for extending and retracting said scissors lift mechanism;
- a platform mounted to said lift mechanism;
- means for mounting said platform to said upstanding support members for slidable movement over the length of said upstanding support members;
- first stabilizer means including a pluralility of stabilizer legs each pivotably mounted to said base for positioning at a stored position and a support position disposed downwardly, angularly away from said base;
- and
- second stabilizer means including two stabilizer struts one pivotably mounted at attachment locations operably connected to each upstanding support member for positioning in a stored position and a support position disposed downwardly, angularly away from said support members, free ends of the stabilizer struts being spaced apart a greater distance from each other than a spacing of the attachment locations of said struts.
7 more elements
Dependencies are inferred from the claim text.