US 11,872,172 B2Granted

Lift system with lowering mechanism

AssigneeLiko Research & Development AB

InventorsMattias Andersson, Roger Karlsson, Andreas Gelfgren

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Abstract

A movement system for use with an overhead patient lift system includes a motor. A drum is operatively coupled to the motor. The drum is configured to be selectively driven by the motor to rotate in one of a clockwise direction and a counter-clockwise direction. A lifting strap is coupled to the drum. The lifting strap is extendable and retractable with respect to a carriage of the overhead patient lifting system as the drum rotates. A manual release operatively coupled to the drum is actuatable to selectively disengage the drum from the motor to allow the lifting strap to be manually extended. Also disclosed is an overhead patient lift system including the movement system and a method for manually extending a lifting strap of an overhead patient lift system.

Claims20

Dependent claims

A selectably driven movement system comprising:

a motor;
a brake hub having an outer cylindrical surface, the brake hub being operatively coupled to the motor and configured to be driven by the motor to rotate in one of a clockwise direction and a counter-clockwise direction;
a control hub having an outer cylindrical surface, the control hub being concentrically aligned with and operatively coupled to the brake hub, wherein the control hub is selectively driven by the brake hub;
a wrap spring operatively coupling the control hub to the brake hub;
and
an actuation mechanism operatively coupled to the wrap spring to urge the wrap spring to expand in a radial direction with respect to a longitudinal axis of the brake hub to allow the control hub to rotate with respect the brake hub, the actuation mechanism comprising:
a ratchet;
and
a ratchet wheel including one or more ramped gear teeth engageable with the ratchet in one direction to expand the wrap spring in the radial direction.

6 more elements

A selectably driven movement system comprising:

a motor;
a drive shaft operatively coupled to the motor;
a brake hub coupled to the drive shaft, the brake hub having an outer cylindrical surface and configured to be driven by the drive shaft to rotate in one of a clockwise direction and a counter-clockwise direction;
a control hub having an outer cylindrical surface, the control hub being concentrically aligned with and operatively coupled to the brake hub, wherein the control hub is selectively driven by the brake hub;
a wrap spring operatively coupling the control hub to the brake hub;
and
an actuation mechanism operatively coupled to the wrap spring to urge the wrap spring to expand in a radial direction with respect to a longitudinal axis of the brake hub to allow the control hub to rotate with respect the brake hub, the actuation mechanism comprising:
a ratchet;
and
a ratchet wheel including one or more ramped gear teeth engageable with the ratchet in one direction to expand the wrap spring in the radial direction.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/797,117Filed 21 Feb 2020 · division
Priority: 9 Jun 2012
Published: US 2020/0188205 A118 Jun 2020
Granted: 16 Jan 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

A61G 7/1065
Safety means: with electronic monitoring
A61G 7/1015
Lifting of patients by: cables, chains or cords
A61G 7/1042
Devices carried or supported by: rail systems
A61G 7/1051
Attachment, suspending or supporting means for patients: flexible harnesses or slings

Family

Application61/657,743Us provisional application · filed 9 Jun 2012
Application61/736,954Us provisional application · filed 13 Dec 2012
Application13/914,023Parent of this continuation · filed 10 Jun 2013
Application15/230,794Parent of this division · filed 8 Aug 2016
US 9,408,765 B2Parent of this continuation · filed 9 Aug 2016
US 2020/0188205 A1Pre-grant publication · published 18 Jun 2020
US 10,610,431 B2Parent of this division
Application15/230,794Parent of this continuation
US 2014/0075669 A1Published application
US 2016/0338895 A1Published application
US 11,872,172 B2This patent

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