Resources Contact Us Home
Fire hydrant system

Image Number 12 for United States Patent #7228868.

The present invention relates to a hydrant system that is projected over the ground while being buried in the underground. The hydrant system comprises a sluice valve connected to a water-guide tube within a manhole M, the sluice valve having a first openings/shutting shaft disposed therein; a female cylinder having a drain valve that is opened when the sluice valve is locked and that is locked when the sluice valve is opened, and a bracket having a through-hole; a male cylinder having a piston for opening/shutting the bottom of the male cylinder as a piston rod is rotated in the forward or reverse direction; a rod for limiting a projection range of the male cylinder protruded against the female cylinder; a manhole cover having a sub hole through which the male cylinder passes; a second opening/shutting shaft for rotating the first opening/shutting shaft; and a universal joint, which connects the first opening/shutting and the second opening/shutting shaft.

  Recently Added Patents
Performance venue with dynamic mechanical load management system and method
Flash memory apparatus and method for generating read voltage thereof
Method for producing semiconductor substrate, semiconductor substrate, method for manufacturing electronic device, and reaction apparatus
Document-related representative information
Systems for usage based rate limiting over a shared data link
Systems and methods for adaptive error thresholds or adaptive modulation schemes based on atmospheric conditions
Web-based system and method for video analysis
  Randomly Featured Patents
Cable connection to sensors in a well
Alcoholic aqueous gel-like phospholipid composition, its use and topical preparations containing it
Split-torque face gear transmission
Pad transfer printing method for making colored contact lenses
Data buffer for the duration of cyclically recurrent buffer periods
Video format signal recording and reproducing device
Methods and compositions for detecting Bacillus species
Nanolaminate microfluidic device for mobility selection of particles
Emergency training aid device
Mult-mode I/O interface for synchronizing selected control patterns into control clock domain to obtain interface control signals to be transmitted to I/O buffers