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US 2019/0249446 A1Published application
Lifting device including telescoping mast
AssigneeMarshalltown Company
InventorJoseph F. Partain
Life of this patent
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AssigneeMarshalltown Company
InventorJoseph F. Partain
Estimating the term…
A lifting device for elevating a load includes a telescoping mast having an inner mast section telescopically received within an outer mast section and configured to extend in an upward direction and retract in a downward direction relative to the outer mast section. An emergency brake is secured to the inner mast section and includes first and second eccentrics configured to rotate relative to the inner mast section between an unlocked position, in which the first and second eccentrics are free from locking engagement with the outer mast section to allow retraction of the inner mast section, and a locked position, in which the first and second eccentrics are in locking engagement with the outer mast section to inhibit retraction of the inner mast section. A base of the lifting device may include a holder having a tapering interior for receiving the telescoping mast.
A lifting device for elevating a load, the lifting device comprising:
The lifting device of claim 16, wherein the base includes a mast holder sized and shaped to receive a lower end of the telescoping mast therein, the mast holder defining an opening at an upper end thereof and through which the lower end of the telescoping mast enters the mast holder, wherein the mast holder includes opposing interior holder surfaces configured to engage the lower end of the telescoping mast when the telescoping mast is received in the mast holder, the opposing interior holder surfaces defining a transverse distance therebetween that tapers in a downward direction away from the opening.
A lifting device for elevating a load, the lifting device comprising:
Dependencies are inferred from the claim text.