Patent ID: 11952866
Assignee: BLACK GOLD PUMP AND SUPPLY, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 0:
1. A guideless cage for a down-hole valve comprises:
a cylindrical mandrel having an upper end and a lower end with a longitudinal axis defined there between;
an axial bore extending from the upper end to the lower end, the axial bore having an upper section and a lower section;
a ball stop structure disposed in the upper section, the ball stop structure extending radially inward into the axial bore;
an inwardly facing valve seat shoulder disposed within the lower section; and
a ball travel section defined within the axial bore, the ball travel section extending downwardly from the ball stop structure to the valve seat shoulder, the ball travel section having a first diameter downwardly adjacent the ball stop structure, a second diameter upwardly adjacent the valve seat shoulder, and a transition section extending between the first diameter and the second diameter, wherein the first diameter is larger than the second diameter and the transition section has a transition diameter which decreases linearly between the first diameter and the second diameter wherein the ball travel section provides a full-open flow area not having an intervening guide.