Power lawn mowers

Claim 1

A SURFACING DEVICE HAVING A REEL CUTTER-LIKE MEANS, A FRAME HAVING SPACED APART UPSTANDING END FLANGES WITH A DECK THEREBETWEEN AND ALSO SPACED APART SIDE WINGS FORWARDLY OF THE SAID DECK, GROUND WHEELS CONNECTED TO AND SUPPORTING THE FRAME, A GUIDING HANDLE MEANS PIVOTED TO PORTIONS OF THE FRAME, A POWER UNIT FIXED IN POSITION ON THE DECK OF SAID FRAME, THE GROUND WHEELS EACH HAVING AN INTERIOR TRACK, A SHIFTABLE DRIVING MEANS HAVING CONNECTION WITH SAID TRACK, TRANSMITTING MEANS CONNECTING THE POWER UNIT WITH THE SHIFTABLE DRIVING MEANS FOR ROTATING THE GROUND WHEELS, A CRANK MEANS HAVING CAM MEANS CONNECTING A PORTION OF THE HANDLE GUIDING MEANS WITH SAID SHIFTABLE DRIVING MEANS SO THAT WHEN THE HANDLE GUIDING MEANS IS IN A LOW POSITION THE SHIFTABLE DRIVING MEANS IS OUT OF CONTACT WITH SAID TRACK, BUT WHEN THE HANDLE GUIDING MEANS IS IN A RELATIVELY HIGH POSITION THE DRIVING MEANS IS IN CONTACT WITH SAID TRACK, A CURVED SLOT IN EACH UPSTANDING END FLANGE, AXLE MEANS FOR EACH GROUND WHEEL, EACH AXLE EXTENDING THROUGH ITS RESPECTIVE CURVED SLOT, MEANS FOR FIRMLY FIXING EACH AXLE IN ITS RESPECTIVE SLOT SO THAT THE HEIGHT OF THE AXLES ABOVE A GROUND SURFACE CAN BE VARIED WITHOUT INTERFERING WITH THE SHIFTABLE DRIVING MEANS IN ITS PROPER ADJUSTMENT.