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US 5,490,757 AGranted
Lifting apparatus
OwnerDaniel Stratmaninventor
Life of this patent
Estimating the term…
Abstract
A lifting apparatus preferably for applications in which a floor covering is to be removed and/or installed, has a lever arm and support that provide portions of two interconnected linkages. An interchangeable bracket is raised and lowered by the lifting apparatus. The bracket is provided with portions that insert into a partition member to raise the partition when the bracket is raised by the lifting apparatus.
Claims21
A lifting apparatus for raising furnishings during removal and installation of floor covering, comprising:
- means for supporting a lifting apparatus at a distance from a work area;
- means for leveraging an item to be raised and lowered, the leveraging means supported for pivoting movement by a portion of the supporting means, and the portion of the supporting means providing pivoting support of the leveraging means providing a fulcrum for the leveraging means;
- a four bar linkage assembly, the linkage assembly formed by the leveraging means and the supporting means, a vertical link member and a lower link member, the vertical link of the four bar linkage assembly moving in a substantially vertical path;
- means for engaging a portion of the furnishing to be raised, the engaging means carried by the link moving in the substantially vertical path;
- and
- means for controlling the position of the leveraging means comprising a combination sliding member sliding relative to the leveraging means and a control arm, the sliding means and control arm providing a complementary four bar linkage in which the supporting means forms a stationary link of the linkage, and the leveraging means forms a link of the linkage, the controlling means further including engagable locking means which when engaged prevents movement of the leveraging means, thereby maintaining the engaging means in a desired position.
3 more elements
A lifting apparatus for raising furnishings during removal and installation of floor covering, comprising:
- means for supporting a lifting apparatus at a distance from a work area, the means for supporting the lifting apparatus including a generally vertical member supported on a supporting foot member;
- means for leveraging an item to be raised and lowered, the leveraging means supported for pivoting movement by a portion of the supporting means, and the portion of the supporting means providing pivoting support of the leveraging means providing a fulcrum for the leveraging means;
- a four bar linkage assembly, the linkage assembly formed by the leveraging means and the supporting means, a vertical link member and a lower link member, the vertical link of the four bar linkage assembly moving in a substantially vertical path;
- means for engaging a portion of the furnishing to be raised, the engaging means carried by the link moving in the substantially vertical path, the means for engaging a portion includes a member capable of engaging the furnishing to be raised;
- and
- means for controlling the position of the leveraging means comprising a combination sliding member sliding relative to the leveraging means and a control arm, the sliding means and control arm providing a complementary four bar linkage in which the supporting means forms a stationary link of the linkage, and the leveraging means forms a link of the linkage.
3 more elements
A lifting apparatus for raising furnishings during removal and installation of floor covering, comprising:
- means for supporting a lifting apparatus at a distance from a work area, the means for supporting the lifting apparatus including a generally vertical member supported on a supporting foot member;
- means for leveraging an item to be raised and lowered, the leveraging means supported for pivoting movement by a portion of the supporting means, and the portion of the supporting means providing pivoting support of the leveraging means providing a fulcrum for the leveraging means;
- a four bar linkage assembly, the linkage assembly formed by the leveraging means and the supporting means, a vertical link member and a lower link member, the vertical link of the four bar linkage assembly moving in a substantially vertical path;
- means for engaging a portion of the furnishing to be raised, the engaging means carried by the link moving in the substantially vertical path, the means for engaging a portion includes a member capable of engaging the furnishing to be raised, the engaging means including a bracket having a plurality of extensions for insertion into complementary openings in the furnishing member;
- and
- means for controlling the leveraging means for maintaining the engaging means in a desired position, the means for controlling the position of the leveraging means including a combination sliding member sliding relative to the leveraging means and a control arm, the sliding member and control arm providing a complementary four bar linkage in which the supporting means forms a stationary link of the linkage, and the leveraging means forms a link of the linkage.
3 more elements
A method of lifting furnishings during removal and installation of floor covering, comprising the steps of:
- supporting a lifting apparatus at a distance from a work area;
- leveraging an item to be raised and lowered;
- supporting a leveraging means for pivoting movement by a portion of a supporting means;
- pivoting the leveraging means relative the supporting means;
- engaging a portion of the furnishing to be raised with an engaging means;
- carrying the engaging means carried by a link member of a four bar linkage;
- moving the link member in the substantially vertical path;
- controlling the leveraging means for maintaining the engaging means in a desired position;
- sliding a sliding member along the leveraging means;
- and
- controlling the position of the leveraging means with the sliding member.
8 more elements
Dependencies are inferred from the claim text.