Replacing central heating pipework comprises connecting the front end of an old pipe to a winch, connecting the rear end of the old pipe to the front end of a new pipe, and operating the winch

摘要

#CMT# #/CMT# Replacing pipework in the central heating system of a building comprises connecting the front end of an old pipe to a winch mounted on a frame, connecting the rear end of the old pipe to the front end of a new pipe, and operating the winch so that the old pipe is pulled out while the new pipe is pulled in. #CMT# : #/CMT# An independent claim is also included for apparatus for carrying out the above process, comprising a frame equipped with a winch for pulling out the old pipe (10). #CMT#USE : #/CMT# Replacing pipework in the central heating system of a building. #CMT#ADVANTAGE : #/CMT# The old pipe is easily removed and replaced by a new pipe. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows apparatus for replacing pipework as above. 1 : Frame 2 : Leg 3 : Winch 4 : Winch shaft housing 5 : Winch shaft 6 : Gear system 7 : Second shaft 9 : Handle 10 : Old pipe. #CMT#MECHANICAL ENGINEERING : #/CMT# Preferred Apparatus: The frame (1) comprises a housing (4) for the shaft (5) of the winch (3), which is driven by a second shaft (7) through a gear system (6). The second shaft has a smaller gear wheel than the winch shaft, especially with a gear ratio of 4:1. The winch is operated manually by means of handles (9) on the second shaft. The frame is mounted on a stand or on legs (2).