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US 3,951,020 AGranted
Centering assemblies for lathes
OwnerGeorge Abdelmalak Makareminventor
Life of this patent
Estimating the term…
Abstract
An improved centering assembly for a lathe in which a drill is axially housed in a rotatable centre for the lathe. The drill is movable from a retracted position within the centre to an extended position where it axially projects from the centre to drill a centre hole in a workpiece.
Claims9
A centering assembly for centering a workpiece on a lathe, said assembly comprising:
- a housing mountable in a lathe;
- a center member rotatably mounted in the housing and having an opening along its axis of rotation;
- a drill;
- a movable support member supporting the drill fast with the housing and in said opening;
- moving means for moving the support member so as to move the drill along said axis between a retracted position within the center member and an extended position for drilling a workpiece;
- and brake means comprising a cup-shaped surface formed on the center member, a conical surface formed on the moving means, and a brake lining on said conical surface, operation of the moving means to move the drill to said extended position being arranged to engage said brake lining with the cup-shaped surface, thereby preventing rotation of the center member.
3 more elements
A centering assembly for centering a workpiece in a lathe, said assembly comprising:
- a housing mountable in a lathe;
- a center member rotatably mounted in the housing and having an opening along its axis of rotation;
- a drill;
- a movable support member supporting said drill fast with the housing and in said opening;
- means for moving said support member so as to move the drill within said opening and thus along said axis of rotation between a retracted position with the center member and an extended position for drilling a workpiece;
- and brake means for holding the center member fast with the drill and support means when the drill is moved to its extended position.
3 more elements
Dependencies are inferred from the claim text.