US Patent:
20120160328, Jun 28, 2012
Inventors:
REED VIVATSON - Temple TX, US
MARK BERGSTROM - Harker Heights TX, US
ROBERT DEVONSHIRE - Denver PA, US
International Classification:
F16K 11/02
F16L 27/00
Abstract:
A hydraulic swivel has a case defining a substantially cylindrical interior and a first access port defined in a side thereof, the first access port providing a path for fluid communication between an interior and an exterior of the case. A spool occupies the interior of the case, the spool and the case together defining a first circumferential channel such that the access port is in fluid communication with the channel regardless of the rotational relationship between the case and the spool, and wherein the spool defines a first interior passageway, the first interior passageway having a port connecting to the first circumferential channel. An actuator occupies at least a portion of the first interior channel selectively blocking and enabling fluid communication between the first circumferential channel and the first interior passageway and therefore selectively blocking and enabling fluid communication between the access port and the first interior passageway.
