Resources Contact Us Home
Browse by Category: Main > Engineering
Class Information
Number: 405/247
Name: Hydraulic and earth engineering > Foundation > Columnar structure (e.g., pier, pile) > Process or apparatus for installing > Driving removable wall supporting core > Diametrically retractable core > Fluid pressure actuated
Description: Method or apparatus wherein a liquid or gas under pressure is employed to change the diameter of the core.

Patents under this class:

Patent Number Title Of Patent Date Issued
6923599 In-ground lifting system and method Aug. 2, 2005
6863475 Apparatus for injecting fluids Mar. 8, 2005
4826357 Device for the internal occlusion of tubular foundation piles May. 2, 1989
4430024 Hydraulically operated mandrels Feb. 7, 1984
4426175 Method of and apparatus for reinforcing piling structure and improved precast concrete pile suitable for use in said method Jan. 17, 1984
3984992 Pile driving mandrel Oct. 12, 1976

  Recently Added Patents
Single mode optical fiber with improved bend performance
Methods and systems for sending messages regarding an emergency that occurred at a facility
Trimming circuit and semiconductor device
Multiple secure elements in mobile electronic device with near field communication capability
Data transfer operation completion detection circuit and semiconductor memory device provided therewith
Viewing stand
Semiconductor device and manufacturing method thereof
  Randomly Featured Patents
Memory having error detection and correction
Array substrate and method of fabricating the same
Method and system for transport of packet-based datastreams over frame-based transport systems employing physically diverse transmission channels
Storage area network methods and apparatus for identifying fiber channel devices in kernel mode
Texturing apparatus for magnetic recording medium and magnetic recording medium process thereby
Gaming device having a game with multiple selections and progressive game incrementation
Information processor, TV system, control method and program
Expanding vertebral body implant
N-Substituted 2-methylnaphthylamides, their preparation and fungicides containing these compounds