Grooved drum and associated passive guide for motorized lifting device

US9567194B2 · kind B2 · utility

Inventors

• David R. Hall · Provo, US
• Jerome Miles · Spanish Fork, US
• Michael Hall · London, CA
• Daniel Madsen · Bunker, US

Key dates

• Filing date: Apr 4, 2014
• Grant date: Feb 14, 2017
• Expiry date: Jun 6, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66D1/58
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An apparatus includes a motor and a drum rotated by the motor to draw in or let out a line from the drum. The drum includes a groove formed in an outer surface thereof to accommodate the line. In certain embodiments, a depth of the groove is equal to or greater than a radius of the line. In the same or other embodiments, a passive guide that physically engages and tracks the groove may be used to guide the line into the groove.