TRAVEL DRIVE AND GRAB Russian patent published in 2003 - IPC

FIELD: mechanical engineering. SUBSTANCE: proposed travel drive and grab are designed for shifting working member from one position to the other. Travel drive contains flexibly deformable member in form of four curved flat pipes connected by ends to form closed circuit so that two first opposite pipes are curved towards each other and two other pipes, from each other. It has union installed on one of pipes to deliver working medium and designed for fastening drive. Said union is installed on one of two second opposite pipes. Grab includes travel drive made as stated above and jaws, each connected with corresponding one of two first opposite pipes. EFFECT: simplified design, improved reliability. 4 cl, 6 dwg