FIELD: mechanical engineering; pumps. SUBSTANCE: proposed portable hydraulic pump can be used for fighting of forest fires, spraying of liquid solutions (working mixtures) and sprinkling of plants. Pump has sleeve and rod, piston with cup made of elastoplastic material and pressure nut installed at end face side of piston. Piston is made in form of truncated cone and is mated with cup installed for sliding along conical surface of piston. Cup is made in form of flat ring with diameter exceeding sleeve bore. Pressure nut is installed to adjust pressing of cup to conical surface of piston with wear of cup. EFFECT: increased service life of pump, improved adaptability of manufacture. 3 cl, 4 dwg
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