Resources Contact Us Home
Browse by Category: Main > Construction
Class Information
Number: 172/90
Name: Earth working > With drive means for tool or cleaner > Irregular or off-center ground-engaging wheel or support
Description: Apparatus in which an earth working element which is supported on a frame is moved towards and away from the earth by a lifting member which is rotatably or pivotally supported on an axis on said frame and has circumferential portions which extend radially to varying distances from said axis in such fashion that said lifting member engages the earth and periodically lifts the frame and the earth working element.

Patents under this class:

Patent Number Title Of Patent Date Issued
6151811 Retractable assembly for trenchers and walk-behind power units Nov. 28, 2000
5673757 Ground opening device Oct. 7, 1997
4227579 Dike producing device Oct. 14, 1980
4213502 Self tripping dammer Jul. 22, 1980
4155315 Mobile spreader May. 22, 1979
4002206 Ditcher Jan. 11, 1977

  Recently Added Patents
Phase-amplitude 3-D stereo encoder and decoder
Decentralized processing network
Coating composition, and a process for producing the same
Case of electronic device having antenna pattern embedded therein and mold and method for manufacturing the same
Multi user MIMO detection utilizing averaged spatial whitening
Systems and methods for providing a video playlist
Methods and systems to accomplish variable width data input
  Randomly Featured Patents
Liquid diffuser device
Fluid coupling for mobile equipment
Diet control device and method
Image sensing apparatus with at least two transfer speeds and its control method
Telephone answering machine with remote control capabilities
Single arm attached cyclodextrin polysiloxanes and use thereof as chiral stationary phases in chromatographic separation of enantiomers
Hybrid detector for X-ray imaging
Counter circuit and method of operating the same
Surfboard protective tip
Organopolysiloxane compositions and rubber articles