Piston pulling apparatus
OwnerRobert T. Scottinventor
Life of this patent
Estimating the term…
Abstract
A piston pulling apparatus constructed like a mandrel; having top and bottom ends and a cylindric periphery body defined by an array of piston bowl gripping segments having tops and bottoms and lying longitudinally between the top and bottom ends. The top end and the proximate tops of segments are held to each other with a fixed radius and circumference. The bottom end and its proximate array of bottoms are coupled to enable the radial expansion of the array from its bottoms. A threaded shaft lies axially within the body and is coupled to the bottom end to move it vertically upward axially, to displace the segment array bottoms radially, to increase the effective circumference of this apparatus near its bottom end; which, during the expansion, can be positioned to grip the inner sides of a piston bowl.
Claims12
A piston pulling apparatus comprising:
- a body having a head member and a base member;
- said body, between said head and base members, initially having a cylindric periphery defined by the exterior surfaces of an array of gripping segments, each said gripping segment having a top, an exterior surface, an interior surface and a bottom;
- said segment tops being secured to each other by inelastic means proximate said head member;
- said segment bottoms being secured to each other by elastic means and initially arranged around said base member;
- said base member is mounted for controlled movement toward said head member and for impinging upon each said interior surface during such movement;
- said base member and each said interior surface being constructed and arranged such that impinging movement of said base member displaces said segment bottoms radially outward, to increase the circumference of said apparatus proximate to said segment bottoms, but said inelastic means holds said segments tops to prevent their radial displacement;
- and
- said head member is mounted to inhibit its movement toward as well as away from said base member.
Dependencies are inferred from the claim text.