US 12,129,922 B2
Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston
Maura J. Stafford, Warner Robins, GA (US); and Andrew M. Deyo, Keene, NH (US)
Assigned to Sonnax Transmission Company, Bellows Falls, VT (US)
Filed by Sonnax Transmission Company, Bellows Falls, VT (US)
Filed on Dec. 27, 2022, as Appl. No. 18/089,418.
Application 18/089,418 is a continuation in part of application No. 17/527,946, filed on Nov. 16, 2021.
Claims priority of provisional application 63/115,924, filed on Nov. 19, 2020.
Prior Publication US 2023/0135948 A1, May 4, 2023
Int. Cl. F16H 61/00 (2006.01); F15B 1/04 (2006.01)
CPC F16H 61/0009 (2013.01) [F16H 61/0021 (2013.01); F15B 1/04 (2013.01); F15B 2201/21 (2013.01); F15B 2201/31 (2013.01); F15B 2201/312 (2013.01); F15B 2201/405 (2013.01); F15B 2201/60 (2013.01); F15B 2201/61 (2013.01); F16H 2061/0034 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A drop-in signal accumulator piston assembly to replace an original equipment (OE) signal accumulator piston in a vehicle transmission hydraulic circuit, the OE signal accumulator piston positioned in a bore in a valve body having a fluid port, the drop-in signal accumulator piston assembly comprising:
a cylindrical sleeve having open first and second ends;
a piston positioned in the sleeve, the piston being cup-shaped, having an open end and a closed end;
a spring positioned in part in the open end of the piston and in part extending beyond the open end of the piston;
a seal configured to be positioned between the sleeve and the valve body bore;
wherein the sleeve is configured to be positioned in the valve body bore, with the piston and the spring positioned in the sleeve; and
wherein the sleeve, the piston, and the spring are configured to be enclosed within the valve body bore such that the seal provides a seal between a bottom wall of the valve body bore and the sleeve.