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. 18, 1989
Filed:
Mar. 21, 1988
Ann T Attenasio, Revere, MA (US);
The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US);
Abstract
A device for lifting a limp sheet member is disclosed. This device comprises a first tubular sleeve member which encloses an elongated interior region extending along a reference axis. The sleeve member has substantially planar, circular, aperture-defining rim disposed about and coaxial with the reference axis at the distal end of the interior region. The proximal end of the interior region is coupled to a region of relatively low pressure. The device also comprises structure for defining a composite airflow path from a region of relatively high pressure, through the first rim and interior region to the low pressure region, and includes vanes, grooves or sleeves for establishing an airflow vortex in the composite airflow path substantially at the first rim and disposed about the reference axis.