Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Rowing machine










Image Number 9 for United States Patent #4846460.

A compact portable rowing machine features a hollow container that holds a supply of water. Pulling on a drive cord during a pulling segment of a stroke rotates a paddle or like mechanism located within the container to rotate the water to produce a monentum effect. Turbulence in the water provides fluid resistance to the rotation of the paddle. A drive cord is wrapped on a double spool mounted on a clutch to drive the paddle in one direction. The wrapping is such that changing the length of the drive cord between the spool and a handle gripped by a user changes the radius at which tangential force is applied by the cord to the spool to vary the resistance of the machine. In one form the drive cord also forms a portion of the recoil mechanism as a continuous closed loop strap secured at its ends to different spools of a double spool. A continuous portion of the drive cord located between the handle and one spool is to secured to the handle. The handle is constructed so that in a normal operating orientation its position on the strap is fixed, but in an unlocked orientation it may be moved any degree to increase or decrease the resistance of the machine.








 
 
  Recently Added Patents
Focus adjustment unit and optical scanning microscope
Collaborative data redundancy for configuration tracking systems
System and method for outputting virtual textures in electronic devices
Method and system for controlled media sharing in a network
Vehicle driving assistance apparatus
Apparatus and method for categorizing services using canonical service descriptions
Semiconductor device and method of manufacturing the same
  Randomly Featured Patents
Dustless drywall sander
Adult tricycle
Neoregelia plant named `Franca`
Optical-disk recording method, recording apparatus and reproducing apparatus
Indoor/outdoor golf practice target
Lens mold carrier
Method of estimating the volumetric carrying capacity of a truck body
Voltage driven microwave amplitude modulation system
Method of fabricating a spline drive
Method for producing a device applicable to biological tissues, particularly a patch for treating damaged tissues, and a device obtained by said method