Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
Apparatus for cleaning the bore of a pipe comprising a cleaning tool motor having a housing and a drive shaft which extends from the housing and which is adapted to receive a pipe cleaning tool rotatable with the drive shaft, at least three guide devices which are supported by support means connected to the housing and which are disposed around the housing in spaced apart relationship towards the drive shaft end of the housing so as in use to bear against the bore of a pipe to be cleaned thereby to position the drive shaft coaxially of the pipe, drive wheel means, drive motor means operatively associated with the drive wheel means for driving the apparatus through a pipe to be cleaned, a jacking arm for the drive wheel means which extends away from the end of the housing remote from the drive shaft, and jacking arm actuator means operative for jacking the drive wheel means into driving contact with the wall of a pipe to be cleaned.
Claim 2
Dependent Claim
168 words
Apparatus for cleaning the bore of a pipe comprising a cleaning tool motor having a housing and a drive shaft which extends from the housing and which is adapted to receive a pipe cleaning tool rotatable with the drive shaft, at least three guide devices which are supported by support means connected to the housing and which are disposed around the housing in spaced apart relationship towards the drive shaft end of the housing so as in use to bear against the bore of a pipe to be cleaned thereby to position the drive shaft coaxially of the pipe, drive wheel means, drive motor means operatively associated with the drive wheel means for driving the apparatus through a pipe to be cleaned, a jacking arm for the drive wheel means which extends away from the end of the housing remote from the drive shaft, and jacking arm actuator means operative for jacking the drive wheel means into driving contact with the wall of a pipe to be cleaned.
Claim 3
Dependent Claim
35 words
Apparatus as claimed in claim 1 wherein the cleaning tool motor, the drive motor means and the actuator means are arranged to be operated pneumatically by compressed air fed to the apparatus via feedpipe means.
Claim 4
Dependent Claim
31 words
Apparatus as claimed in claim 2 wherein the feedpipe means comprises a main feedpipe which extends along the longitudinal axis of the apparatus so as to feed the cleaning tool motor.
Claim 5
Dependent Claim
18 words
Apparatus as claimed in claim 1, claim 2, or claim 3 wherein the guide devices are guide wheels.
Claim 6
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein the drive wheel means comprises three drive wheels.
Claim 7
Dependent Claim
20 words
Apparatus as claimed in claim 5 wherein the drive motor means comprises separate air motors one for each drive wheel.
Claim 8
Dependent Claim
32 words
Apparatus as claimed in claim 5 wherein the jacking arm is an automatically controllable jacking arm for one of the drive wheels, the remaining drive wheels being mounted on manually adjustable arms.
Claim 9
Dependent Claim
35 words
Apparatus as claimed in claim 7 wherein the automatically controllable jacking arm is operatively coupled to actuator means formed by a pneumatically controlled actuator, the pneumatically controlled actuator being fed from the feed pipe means.
Claim 10
Dependent Claim
52 words
Apparatus as claimed in claim 8 wherein the pneumatically controlled actuator comprises a cylinder within which a drive piston is enclosed and arranged so as to drive through mechanical linkages the jacking arm, responsively to the application of compressed air to the cylinder which is fed thereto via the feed pipe means.
Claim 11
Dependent Claim
28 words
Apparatus as claimed in claim 9 wherein the pneumatically controlled actuator is a double action actuator which-is drivable in reverse so as to move the jacking arm inwardly.