Locking plate members for use in system for overhead support of weighted articles
US4125241A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Mar 7, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved safety system for raising, lowering and supporting in an elevated or lowered position, a weighted article from an overhead support. The system includes a link chain passing over a safety pulling member, the link chain having one end permanently connected to the weighted article and the other end permanently connected to an attachment means positioned within reach of a person so that the person may pull the link chain downwardly to raise the weighted article to a desired elevation out of range of the person. The link chain has an improved locking member thereon which may be detachably attached to and locked to the attachment means. The locking member, once installed on the link chain at the proper position, is tamper proof and substantially break proof. The weighted article may be a clothes basket, or other receptacle, or any article in which it is desired to selectively suspend overhead out of reach of a person and then lower within range of a person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.