| 摘要 |
FIELD: pump engineering; air pumps for inflating pneumatic tyres of bicycles and other vehicles with nipple and spool tyre valves. SUBSTANCE: hand piston pump has housing with cylindrical space, rod with piston installed to form delivery chamber, end face head with longitudinal and cross channels for distributing air and connecting to corresponding valves of pneumatic tyres, check valve and spool valve opening device arranged in corresponding spaces of head, and sealing cup installed for adjusting its tension. According to invention, housing is made integral with end face head of polymeric material. Longitudinal channel is made in form of close-to-wall slot communicating with cross channel through conical space from side of its smaller base. From side of larger base, conical space is partially overlapped by detachable spool valve opening drive. Pump is provided with plastic tip with hole for connecting to tyre valve. Tip encloses pump end face head and has lever type member for fixing the tip and adjusting tension of sealing cup. Cup can be made with cylindrical surface or in form of two cones mating by smaller size base. EFFECT: enlarged operating capabilities, increased efficiency, prevention of compressed air losses, increased wear resistance of elastic seal. 4 cl, 8 dwg |
