US 8,556,041 B2Granted

Elevator with traction sheave

AssigneeKone Corporation

InventorsJorma Mustalahti, Esko Aulanko

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Abstract

An elevator includes a set of hoisting ropes supporting a counterweight and an elevator car moving on respective tracks, each hoisting rope having a substantially round cross-section, and a hoisting machine engaging the set of hoisting ropes via a traction sheave. The traction sheave has a plurality of rope grooves. Each of the plurality of rope grooves generally conforms to a substantially circular shape. Each of the plurality of rope grooves has an opening for receiving a hoisting rope from among the set of hoisting ropes. A coating is adhesively bonded to each of the plurality of rope grooves. Each hoisting rope has a diameter below 8 mm. Each hoisting rope is composed of steel wires having a strength exceeding 2000 N/mm2. A contact angle between the set of hoisting ropes and the traction sheave is greater than about 180 degrees.

Claims30

Dependent claims

An elevator, comprising:

a set of hoisting ropes supporting a counterweight and an elevator car moving on respective tracks, each hoisting rope having a substantially round cross-section;
and
a hoisting machine engaging the set of hoisting ropes via a traction sheave;
wherein the traction sheave has a plurality of rope grooves,
wherein each of the plurality of rope grooves generally conforms to a substantially circular shape,
wherein each of the plurality of rope grooves has an opening for receiving a hoisting rope from among the set of hoisting ropes,
wherein a width of the opening is less than a diameter of a respective rope groove,
wherein a coating is adhesively bonded to each of the plurality of rope grooves,
wherein in each rope groove, the coating has a crescent-shaped cross-section,
wherein each hoisting rope has a diameter below 8 mm,
wherein each hoisting rope is composed of steel wires having a strength exceeding 2000 N/mm2, and
wherein a contact angle between the set of hoisting ropes and the traction sheave is greater than about 180 degrees.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/662,353Filed 13 Apr 2010 · division
Priority: FI 200200439 Jan 2002
Published: US 2010/0200337 A112 Aug 2010
Granted: 15 Oct 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B66B 11/08
Driving gear ; Details thereof, e.g. seals: with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
B66B 7/06
Other common features of elevators: arrangements of ropes or cables
B66B 11/008
Roping: with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
B66B 15/04
Rope or cable carriers: friction sheaves; "Koepe" pulleys

Family

PCT/FI03/00012Parent of this continuation · filed 9 Jan 2003
Application10/863,292Parent of this division · filed 9 Jun 2004
US 2010/0200337 A1Pre-grant publication · published 12 Aug 2010
Application10/863,292Parent of this continuation
US 2005/0006180 A1Published application
US 8,556,041 B2This patent

From the US filing history. Foreign family members aren’t listed.