US 9,809,291 B2
Apparatus and method for rotating a shaft
Eric Galloway, Midlothian (GB)
Filed by Eric Galloway, Midlothian (GB)
Filed on Oct. 20, 2009, as Appl. No. 12/582,403.
Claims priority of provisional application 61/106,713, filed on Oct. 20, 2008.
Prior Publication US 2010/0095791 A1, Apr. 22, 2010
Int. Cl. B63H 23/32 (2006.01); B63H 23/06 (2006.01); B63H 23/10 (2006.01); B63H 23/30 (2006.01); B63H 23/34 (2006.01)
CPC B63H 23/32 (2013.01) [B63H 23/06 (2013.01); B63H 23/10 (2013.01); B63H 23/30 (2013.01); B63H 2023/348 (2013.01); Y10T 74/19502 (2015.01)] 18 Claims
OG exemplary drawing
 
1. Turning gear apparatus for rotating a shaft, the apparatus comprising:
a rotary drive arrangement adapted to be fixed to a vessel hull;
a transmission system coupled to the rotary drive arrangement, the transmission system comprising a pivot arm adapted to be pivoted about a pivot axis to engage the transmission system with the shaft to permit rotation of the shaft by the rotary drive arrangement, a first driven member coupled to and adapted for rotation by the rotary drive arrangement, and a second driven member adapted to be driven by the first driven member; and
an actuator for pivoting said pivot arm about said pivot axis between a first position and a second position, and vice versa,
wherein said pivot arm is disposed about said pivot axis, said pivot axis being co-linear with a drive shaft axis of said rotary drive arrangement,
wherein a first part of said pivot arm is disposed on one side of said drive shaft axis and a second part of said pivot arm is disposed on an opposing side of the drive shaft axis from said first part of said pivot arm,
wherein said actuator is physically coupled to said first part of said pivot arm and the second driven member is disposed on said second part of said pivot arm,
wherein the actuator is coupled to a lower portion of the pivot arm and configurable to pivot the pivot arm so that a driven member rotatably coupled to an upper portion of the pivot arm engages with the shaft to permit rotation or the shaft by the rotary drive arrangement.