Trailer suspension assembly

Claim 1

A SUSPENSION ASSEMBLY FOR A TRAILER TO BE SECURED TO TOWING MEANS AND HAVING A FRAME AND TWO WHEELS ROTATABLY MOUNTED ON AXLES ON OPPOSITE SIDES OF SAID FRAME, THE SUSPENSION ASSEMBLY COMPRISING: LONGITUDINALLY-EXTENDING SPRING MEANS FOR EACH OF SAID WHEELS; MEANS FOR RELEASABLY SECURING ONE END OF EACH OF SAID SPRING MEANS TO SAID FRAME; TORQUE TRANSMITTING MEANS EXTENDING TRANSVERSELY ACROSS SAID FRAME AND ROTATABLY SUPPORTED IN SAID FRAME ON OPPOSITE SIDES THEREOF; A PAIR OF FIRST LINKAGE MEANS LOCATED ON OPPOSITE SIDES OF SAID FRAME; SAID PAIR OF FIRST LINKAGE MEANS HAVING FIRST ENDS RESPECTTIVELY SUPPORTING SAID AXLES AND ALSO ROTATABLY SUPPORTING SAID SPRING MEANS SUBSTANTIALLY AT MID-POINTS OF SAID SPRING MEANS; SAID PAIR OF FIRST LINKAGE MEANS HAVING SECOND ENDS ROTATABLY CONNECTED TO OPPOSITE ENDS OF SAID TORQUE TRANSMITTING MEANS; A PAIR OF SECOND LINKAGE MEANS HAVING FIRST ENDS RESPECTIVELY PIVOTALLY CONNECTED TO SECOND ENDS OF SAID SPRING MEANS AND HAVING SECOND ENDS RESPECTIVELY PIVOTALLY CONNECTED TO SAID PAIR OF FIRST LINKAGE MEANS INTERMEDIATE SAID FIRST AND SECOND ENDS OF SAID FIRST LINKAGE MEANS; LIFT ARM MEANS SECURED TO SAID TORQUE TRANSMITTING MEANS AND ENGAGEABLE WITH AT LEAST ONE OF SAID FIRST LINKAGE MEANS; AND EXTENDIBLE MEANS SECURED AT ONE END TO SAID FRAME AND PIVOTALLY CONNECTED AT A SECOND END TO SAID LIFT ARM MEANS TO ROTATE SAID TORQUE TRANSMITTING MEANS AND RAISE AND LOWER A FIRST END OF SAID FRAME REMOTE FROM SAID TOWING MEANS TO AND FROM GROUND LEVEL.