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US 5,842,705 AGranted
Quick-change jaw assembly
AssigneeThe Goss & DeLeeuw Machine Company
InventorsOleg Tabachenko, Fernand U. Boisse
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AssigneeThe Goss & DeLeeuw Machine Company
InventorsOleg Tabachenko, Fernand U. Boisse
Estimating the term…
A rotary chuck having a plurality of quick change jaw assemblies each including a master jaw carried by the chuck body and a top jaw releasably secured to the master jaw by a single retaining fastener having a shank including a frustoconical portion. A resilient roll pin carried by the top jaw bears upon and is compressed by the frustoconical portion. The compressed roll pin exerts a resilient biasing force which acts upon the top jaw to continuously urge an arcuate reference surface on the top jaw into coengagement with a complementary reference surface on the master jaw. A hardened locking pin carried by the jaw assembly bears against a frustoconical head on a locking fastener threadably engaged with the master jaw to prevent relaxation of the resilient biasing force provided by the roll pin when the jaws clampingly engage the I.D. of a tubular workpiece.
A quick change jaw assembly comprising a pair of jaws including a master jaw and a top jaw, coengaging reference surfaces defined by said jaws, and retaining means for releasably securing said jaws in assembled relation to each other and continuously exerting resilient biasing force on one of said jaws urging said references surfaces toward and into coengagement with each other including a retaining fastener having an axially elongated shank and an axially elongated resilient pin carried by one of said jaws and engaged with an associated portion of said shank.
In a chuck including a chuck body having a central axis a pair of jaws including a master jaw supported on said chuck body for radial movement generally toward and away from said central axis and a top jaw carried by said master jaw, reference means for positioning said top jaw on and relative to said master jaw and including coengaging arcuate surfaces on said jaws, said arcuate surfaces having axes of revolution coincident with said axis of rotation, the improvement comprising retaining means for releasably securing said top jaw to said master jaw and continuously exerting resilient biasing force urging said arcuate reference surface on said top jaw member toward and into coengagement with said arcuate reference surface on said master jaw and including a single threaded retaining fastener passing through a fastener bore in said top jaw and threadably engaged with said master jaw and a resilient axially elongated pin carried by said top jaw and engaging said threaded fastener in radially offset relation to the axis of said threaded fastener.
Dependencies are inferred from the claim text.