PROP SHIELD

Brand	Owner	Address	Description
PROPSHIELD	HEXION INC.	180 East Broad Street Columbus OH 43215	PROP SHIELD;proppant flow-back control additive for use in oil and gas wells;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A prop head bearing between the roof bar and the prop (4) of a shield-type support frame, comprising a ball-joint socket (3) on the roof bar and open towards the prop for receiving a ball-joint head (2) on the prop (4), with at least one movable securing element (6, 7) which, when in a secured position, engages in a recess (12, 13) in the joint head (2) to prevent accidental lifting of the joint head (2) out of the socket (3), and with a bolt which locks the securing element (6, 7) in the secured position, in which that the securing element is in the form of a securing pin (6, 7) movable along its longitudinal axis between the secured position and an assembly position, wherein the securing pin (6, 7) is lockable by the bolt (14, 19) in the assembly position, in which it does not engage in the recess (12, 13) in the joint head (2).