US 11,788,439 B2
Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
Andrei Dan Radulescu, Marshall, MI (US); Austin Robert Zurface, Dowling, MI (US); James R. Sheren, Grand Ledge, MI (US); Anthony L. Spoor, Union City, MI (US); Luigi Lia, Turin (IT); and Philip Michael Kline, Tekonsha, MI (US)
Assigned to Eaton Intelligent Power Limited, Dublin (IE)
Filed by Eaton Intelligent Power Limited, Dublin (IE)
Filed on Dec. 21, 2020, as Appl. No. 17/129,356.
Application 14/970,847 is a division of application No. 13/868,045, filed on Apr. 22, 2013, granted, now 9,267,396, issued on Feb. 23, 2016.
Application 17/129,356 is a continuation of application No. 15/792,469, filed on Oct. 24, 2017.
Application 15/792,469 is a continuation in part of application No. 15/418,188, filed on Jan. 27, 2017, granted, now 9,938,865, issued on Apr. 10, 2018.
Application 15/418,188 is a continuation in part of application No. 14/970,847, filed on Dec. 16, 2015, abandoned.
Application 14/970,847 is a continuation in part of application No. 14/838,749, filed on Aug. 28, 2015.
Application 15/418,188 is a continuation of application No. 14/704,066, filed on May 5, 2015.
Application 14/704,066 is a continuation of application No. PCT/US2013/068503, filed on Nov. 5, 2013, granted, now 9,581,085, issued on Feb. 28, 2017.
Application PCT/US2013/068503 is a continuation in part of application No. 14/695,355, filed on Apr. 24, 2015, granted, now 9,644,503, issued on May 9, 2017.
Application 14/838,749 is a continuation of application No. PCT/US2015/018445, filed on Mar. 3, 2015, granted, now 9,869,211, issued on Jan. 16, 2018.
Application 14/695,355 is a continuation of application No. 13/873,797, filed on Apr. 30, 2013, granted, now 9,016,252, issued on Apr. 28, 2015.
Application 13/868,045 is a continuation in part of application No. 13/051,839, filed on Mar. 18, 2011, granted, now 8,726,862, issued on May 20, 2014.
Application 13/051,839 is a continuation in part of application No. 13/051,848, filed on Mar. 18, 2011, granted, now 8,752,513, issued on Jun. 17, 2014.
Claims priority of provisional application 62/081,306, filed on Nov. 18, 2014.
Claims priority of provisional application 61/986,976, filed on May 1, 2014.
Claims priority of provisional application 61/771,769, filed on Mar. 1, 2013.
Claims priority of provisional application 61/640,707, filed on Apr. 30, 2012.
Claims priority of provisional application 61/640,705, filed on Apr. 30, 2012.
Claims priority of provisional application 61/636,277, filed on Apr. 20, 2012.
Claims priority of provisional application 61/315,464, filed on Mar. 19, 2010.
Prior Publication US 2021/0131317 A1, May 6, 2021
Int. Cl. F01L 1/18 (2006.01); F01L 13/00 (2006.01); F01L 1/24 (2006.01); F01L 1/46 (2006.01); F01L 1/053 (2006.01)
CPC F01L 1/185 (2013.01) [F01L 1/18 (2013.01); F01L 13/0005 (2013.01); F01L 13/0015 (2013.01); F01L 13/0021 (2013.01); F01L 13/0036 (2013.01); F01L 1/053 (2013.01); F01L 1/2405 (2013.01); F01L 2001/0537 (2013.01); F01L 2001/186 (2013.01); F01L 2001/467 (2013.01); F01L 2305/00 (2020.05); F01L 2810/02 (2013.01); Y10T 74/20882 (2015.01); Y10T 74/2107 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A rocker arm, comprising:
an outer arm comprising a first side and a second side;
an inner arm disposed between the first side and the second side of the outer arm;
a pivot axle pivotally coupling the inner arm to the outer arm at a first end of the inner arm and a first end of the outer arm;
a latch pin including a first position and a second position, the latch pin configured to:
in the first position pivotally fix the inner arm to the outer arm at a second end of the inner arm and a second end of the outer arm; and
in the second position, enable the inner arm to pivot independently of the outer arm;
a first biasing member urging the latch pin into one of the first position and the second position, a hydraulic fluid passage hydraulically coupled to the latch pin; and
two lost motion springs respectively secured to a mount on each of the first and second sides of the outer arm, each lost motion spring including coils with a trapezoidal cross-sectional shape arranged such that elongated sides of each coil rest against elongated sides of adjacent coils so as to stabilize the respective lost motion spring by holding each coil in an upright position, thereby preventing the coils from angling or passing over each other when subjected to torsional loading,
wherein the latch pin is responsive to hydraulic pressure in the hydraulic fluid passage so as to selectively switch between the first position and the second position,
wherein the inner arm comprises an inner arm sloped surface, and
wherein the latch pin comprises a latch pin sloped surface.