HAND OR GRAVITY EMPLOYED LEVER ACTION SELF MASSAGE TOOL

Brand	Owner	Address	Description
THE BATANDO LEVER-ACTION SELF-MASSAGE TOOL	Knobble Associates	1187 Delaware St. Berkeley CA 94702	hand-or-gravity-employed lever-action self-massage tool;LEVER-ACTION SELF-MASSAGE TOOL;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A gravity valve for a downhole tool for use in a subterranean well and a method of use thereof. The gravity valve is adapted to control the flow of a dowuhole fluid through the downhole tool. The gravity valve typically includes a plunger and a seat. The plunger may embody a substantially non-spherical end that is adapted to mate with a complementary receiving end on the seat. The increase surface area of contact between the plunger and the seat acts to improve the seal therebetween, reduce the stresses thereon, and improve the performance of the gravity valve in general. The components of the gravity valve may be constructed of materials, which are selected based on the specific gravity of the materials in comparison with the specific gravity of the downhole fluid for a given application. A method of constructing and utilizing a gravity valve for a downhole tool.