U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Safety system for overhead support of weighted articles

Patent 4057211 Issued on November 8, 1977. Estimated Expiration Date: Icon_subject November 8, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

318314

491541

590759

1042150

1449363

1595891

2907549

2923515

2962253

3313526

Inventor

Assignee

Application

No. 658051 filed on 02/13/1976

US Classes:

248/332, Pulley brackets248/320, Releasable for lowering248/544, WITH MEANS TO FACILITATE INSTALLATION, REPAIR, OR TRANSPORTATION, OR BROKEN PARTS RETAINER254/393, Plural elements or element with plural cable contacting regions254/415Including pivotal, rotational, or swivel connection

Examiners

Primary: Staab, Lawrence J.

Attorney, Agent or Firm

International Class

B42F 013/00

Abstract

An improved safety system or apparatus for raising, lowering, and supporting in an elevated or lowered position a weighted article from an overhead support. The system or apparatus includes a safety pulley member having a pulley sheave over which a link chain passes, the link chain having one end connected to the weighted article and the other end 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 reach, the link chain then being locked to the attachment means. The weighted article may be a clothes basket, other receptacle, or any other article in which it is desired to suspend overhead. When tension in the link chain between the safety pulley member and the fixed attachment means is suddenly or abruptly reduced and the weighted article begins to fall by gravity and the safety pulley member swivels by gravity to a position where its arrestor arm interrupts the path of the link chain and grips a single link of the chain and prevents the weighted article from dropping freely to the floor.

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