US 12,297,728 B2
Multi-speed turbine reduction gearbox system and method
David Keith Crowe, Tucson, AZ (US); and Elden Crom, Tucson, AZ (US)
Assigned to SIGNAL POWER GROUP OPERATING LLC, Oro Valley, AZ (US)
Filed by Signal Power Group Operating LLC, Oro Valley, AZ (US)
Filed on Nov. 10, 2023, as Appl. No. 18/388,772.
Application 18/388,772 is a continuation of application No. 17/919,244, granted, now 11,852,000, previously published as PCT/US2022/015857, filed on Feb. 9, 2022.
Claims priority of provisional application 63/147,578, filed on Feb. 9, 2021.
Prior Publication US 2024/0076974 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F01D 15/08 (2006.01); E21B 43/26 (2006.01); F01D 15/10 (2006.01); F02C 7/36 (2006.01)
CPC E21B 43/2607 (2020.05) [F01D 15/08 (2013.01); F01D 15/10 (2013.01); F02C 7/36 (2013.01); F05D 2220/76 (2013.01); F05D 2260/4023 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/902 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An engine driven pump gearbox system comprising:
an engine;
a gearbox driven by the engine;
a primary shaft driven directly by the gearbox, the primary shaft having a first primary shaft gear;
a secondary shaft having a first secondary shaft gear;
a collar associated with the secondary shaft for selectively disengaging or engaging the primary shaft and the secondary shaft in at least one of multiple positions:
a first engaged position where the first primary shaft gear engages the first secondary shaft gear;
a disengaged position, being a neutral position, where the primary shaft is disengaged from the secondary shaft;
a primary shaft brake for braking a primary shaft rotation; and
wherein the primary shaft brake is controlled as a clutch to shift engagement of the primary shaft and the secondary shaft between the first engaged position and disengaged position.