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
Silicas and alkali metal salt compositions, detergents formed from such compositions and method of forming such compositions and detergents
Methods and systems for creating a tail risk hedge index and trading derivative products based thereon
Process for producing a plasma protein-containing medicament with reduced concentration of citrate and metals
Method and apparatus for secure transfer and playback of multimedia content
Watch dial
Idle stop and go system and method for controlling thereof
Target trading system and method
  Randomly Featured Patents
System, apparatus, method, program and recording medium for processing image
Process for the preparation of diorganotrisulfide
Method and circuit for scaling and balancing input and output currents in a multi-phase DC-DC converter using different input voltages
Image forming apparatus
Inverse fourth power photometric calibrator
Compositions and methods for treating mast-cell mediated conditions
Decorative element for a vehicle
Granulated material shaker
Control system for a particulate matter filter
Security lock for revolver type handguns