| 摘要 |
712,670. Pumping system for abrasive materials. GLEASON WORKS. Aug. 22, 1952 [Aug. 24, 1951], No. 21101/51. Class 102 (1). [Also in Group XXIII] In a gear-lapping machine (see Group XXIII) an abrasive in liquid suspension is delivered to a nozzle 33 by a pump 138 driven by an electric motor 139. The liquid is agitated by paddles 135. A trap 143 prevents separated abrasive from entering the pump when the machine is idle. |
