The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 1996
Filed:
Apr. 01, 1994
Hancel R Wright, Rockmart, GA (US);
Harry T Metcalfe, North Wales, PA (US);
Engineered Fabrics Corp., Rockmart, GA (US);
Abstract
A lift bag includes a plurality of independently inflatable chambers for controlling lifting of objects. Each chamber is defined by an upper surface sheet and a lower surface sheet, the upper surface sheet of one chamber positioned below an adjacent chamber being securely attached to the lower surface sheet of an adjacent chamber. The lift bag can be operated at pressures of about 15 psig at specified heights which allows greater flexibility compared to conventional, single-chambered lift bag which operate at pressures of about 7 psig. Preferably, all seams, reinforcements, and fittings are vulcanized in place using uncured rubber coated fabric. Grommets or other securing means may provide further stability to the lift bag.