Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Caterpillar board designed in particular for use on grass slopes










Image Number 4 for United States Patent #6039331.

The proposed crawler-mounted board (1) is specifically for the purpose of riding over grass or lawn slopes. It features a crawler unit which consists of two slightly concave-curved undercarriage tracks (12), the tracks being connected to one another by four cross-struts (13). The crawler unit can be mounted to a frame (2) made of tubing or rods. Each of the undercarriage tracks (12) consists of a long elongated body, a flexible crawler track chain, and large number of crawler track segments. A block can be mounted to the outside of each crawler track segment. While the crawler-mounted board is in motion, frictional forces act between the turf and the crawler track chains and the blocks of the crawler unit. These frictional forces cause the crawler track chains along with the crawler track segments to move around the body of the undercarriage tracks (12) in a closed circuit.








 
 
  Recently Added Patents
Multi-phase signal generator and method
Inverter device and drive unit using the same
Method and device for transmitter calibration
Method for adjusting feature size and position
Integrated circuit packaging system with external wire connection and method of manufacture thereof
Method and system of digital content sharing among users over communications networks , related telecommunications network architecture and computer program product therefor
Methods and apparatus for trimming of CDR clock buffer using histogram of clock-like data pattern
  Randomly Featured Patents
Electron gun for a cathode ray tube
Involute lamination armature for a linear reciprocating motor
Plastics material
Electric motor applied clutch with a drag torque actuator
Catalyst component for use in the polymerization of .alpha.-olefins and a method of using the same
Self illumination circuit of a hand-held remote control device and self illumination method thereof
Small deflection coupling for oscillating shafts
Seek actuator for optical recording
Reactor and method for anaerobic wastewater treatment
Ventricular assist device