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. 13, 1993
Filed:
Apr. 24, 1992
Arkadi Relin, Philadelphia, PA (US);
Anatole Milstein, Philadelphia, PA (US);
Other;
Abstract
A suction transporting device for transporting a material has a suction unit, a transporting line connected with the suction unit and having an inlet for receiving a material to be transported and an outlet for discharging the material to be transported and a unit for modulating a suction force of a suction produced in the transporting line by the suction unit, the modulating unit including a passage adapted to communicate the interior of the transporting line with atmosphere, an adjusting element operative for adjusting an initial area and shape of a minimal cross-section of the passage, and a valve mechanism including a drive, a speed controller for controlling a speed of the drive, and a valve body connected with the drive and cooperating with the passage so that when the valve body is displaced by the drive, an initial area and shape of the minimal cross-section of the passage is periodically changed.