Apparatus and method for extending door brake lifespan
US11002073B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2018 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Jun 6, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/807
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure includes a retrofitted door brake cam. The retrofitted door brake cam may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.