Friction slip ring for a drive mechanism
US12281520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2022 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Oct 18, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H1/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window shade system may comprise a drive mechanism having a friction slip ring inside a brake hub, wherein the brake hub is configured to rotate with respect to the friction slip ring, in response to an at least partial rotation of the drive mechanism. The brake hub may be configured to overcome a break-away force between the drive hub and the friction slip ring. The brake hub may be configured to overcome a break-away force between the drive hub and the friction slip ring. The brake hub may be configured to overcome a break-away force of about double a maximum force that a window shade exerts on the friction slip ring. The system may include a spring plunger system abutting a bracket, wherein the spring plunger system may be configured to reduce friction against the bracket in response to a first at least partial rotation of a drive mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.