Fluid heater cleaners

Claim 1

A FLUID HEATER CLEANER ADAPTED TO OPERATE IN A HOT GAS PASS AND HAVING A CLEANING FLUID SUPPLY TUBE, AN ELONGATED NOZZLE TUBE TELESCOPICALLY ARRANGED WITH RESPECT TO THE CLEANING FLUID SUPPLY TUBE AND FORMED AT A FORWARD END WITH NOZZLE MEANS ADAPTED WHEN THE NOZZLE TUBE IS SUPPLIED WITH THE CLEANING FLUID TO EFFECT A CLEANING FLUID DISCHARGE WHICH EXERTS ON THE SAID END OF THE NOZZLE TUBE A WEIGHT SUPPORTING UPTHRUST, TRACK MEANS, CARRIAGE MEANS MOVABLE ALONG AND SUPPORTED BY SAID TRACK MEANS, FIRST SUPPORT MEANS CONNECTING SAID CARRIAGE MEANS TO THE REAR END OF THE NOZZLE TUBE AND PERMITTING ROTATIONAL MOVEMENT OF THE NOZZLE TUBE RELATIVE TO THE CARRIAGE MEANS, ADDITIONAL SUPPORT MEANS SUPPORTING THE NOZZLE TUBE INTERMEDIATE ITS FORWARD AND REAR ENDS, SAID NOZZLE TUBE BEING MOVABLE RELATIVELY TO THE ADDITIONAL SUPPORT MEANS BETWEEN A WITHDRAWN POSITION AND AN ADVANCED POSITION, FIRST CAM MEANS LOCATED IN A POSITION TO BE ADJACENT THE REAR END OF THE NOZZLE TUBE WHEN SAID NOZZLE TUBE IS IN ITS ADVANCED POSITION, SECOND CAM MEANS LOCATED IN A POSITION TO BE ADJACENT THE REAR END OF SAID NOZZLE TUBE WHEN SAID NOZZLE TUBE IS IN ITS WITHDRAWN POSITION, AND CAM FOLLOWER MEANS MOUNTED ON SAID NOZZLE TUBE ADJACENT ITS REAR END ARRANGED TO COACT WITH SAID CAM MEANS SO THAT DURING TERMINATION OF MOVEMENT OF SAID NOZZLE TUBE TO THE ADVANCED POSITION ENGAGEMENT OF THE CAM FOLLOWER WITH THE FIRST CAM MEANS CAUSES ROCKING OF THE NOZZLE TUBE THROUGH A LIMITED ANGLE ABOUT ITS LONGITUDINAL AXIS IN ONE SENSE AND DURING TERMINATION OF MOVEMENT OF SAID NOZZLE TUBE TO THE WITHDRAWN POSITION ENGAGEMENT OF THE CAM FOLLOWER WITH THE SECOND CAM MEANS CAUSES ROCKING OF THE NOZZLE TUBE THROUGH AN EQUAL ANGLE IN THE REVERSE SENSE.