Abstract A public works machine comprises a frame on which a telescopic jib is pivotally mounted, means for controlling pivotal movement of the jib connected between the frame and a first section of the jib which is pivotally mounted on the frame, means for controlling sliding movement of the section of the jib connected between the first and a second section slidable relative to the first section, wherein a member is pivotally mounted on the first section for pivotal movement about an axis parallel to that of the mounting of the jib on the frame, and a working tool is freely supported from the member, pivotal movement of the member being controlled by the sliding control means and an arm pivotally connected between the member and the second section of the jib.
Inventors
👤 Michel M Cresp
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-30 20:06
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
Public works apparatus comprising: a frame; a jib mounted on the frame, comprising at least two telescopic sections, of which a first section is mounted on said frame for pivotal movement about a first axis and a second section is slidable relative to said first section; means for controlling pivotal movement of said jib and connected between said first section of said jib and said frame; means for controlling relative sliding of said two sections and connected therebetween; a member mounted on said first section of said jib for pivotal movement about a second axis parallel to said first axis; a working tool freely suspended from said member; and an arm pivotally connected to said second section of said jib and said member; wherein pivotal movement of said member is controlled by said sliding control means and said arm.
Claim 2
Dependent Claim
139 words
Public works apparatus comprising: a frame; a jib mounted on the frame, comprising at least two telescopic sections, of which a first section is mounted on said frame for pivotal movement about a first axis and a second section is slidable relative to said first section; means for controlling pivotal movement of said jib and connected between said first section of said jib and said frame; means for controlling relative sliding of said two sections and connected therebetween; a member mounted on said first section of said jib for pivotal movement about a second axis parallel to said first axis; a working tool freely suspended from said member; and an arm pivotally connected to said second section of said jib and said member; wherein pivotal movement of said member is controlled by said sliding control means and said arm.
Claim 3
Dependent Claim
24 words
Apparatus as claimed in claim 1, wherein said working tool has a pressurised fluid drive, the fluid source therefor being supported on said frame.