FIELD: mechanical engineering; hydraulic and pneumatic piston mechanisms; piston flowmeters. SUBSTANCE: piston mechanism has housing, rod and piston. Housing is made in form of rectangular hollow prism accommodating piston consisting of cylindrical rolls whose axes are in plane of housing cross section. Rod is rectangular section bar. Rolls serve as guides for bar and are installed for free rolling along surfaces of housing and rod. EFFECT: enlarged operating capabilities. 3 cl, 5 dwg
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| BALANCE | 1996 |
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