Patent ID: 8579380
Filing Date: 2013-11-12
Classification: E21C

Abstract:
1. A water spray assembly for replaceable location in a receiving bore, said water spray assembly comprising: a spray body and a spray nozzle; the spray body and the spray nozzle being releasably connectable together by screw threads, the spray nozzle being co-axial with the spray body when connected to the spray body; the spray body comprising opposite ends, an external circumferential groove between the ends, and an internal fluid chamber, the groove in fluid communication with the fluid chamber; first and second water sealing rings extending around the spray body, the groove being between the first and second rings; a third water sealing ring extending around the spray nozzle; and each of the first, second, and third rings configured to make sealing contact with a portion of the receiving bore when the water spray assembly is in said receiving bore, whereby the spray nozzle is removable from or insertable into one end of the receiving bore while the spray body is disposed in an opposite end of the receiving bore.