Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1994-07-08
1995-05-23
Hughes, S. Thomas
Metal working
Method of mechanical manufacture
With testing or indicating
29446, 192 7028, 192 871, B23P 1100
Patent
active
054169666
ABSTRACT:
A friction element subassembly for an automatic transmission includes a hydraulic cylinder fixed to a hub, the hub providing a snap ring groove, and a balance piston surrounding the hub defining a space within. A return ring assembly, located in a piston, applies a force to the center of a ring through a load cell. The position of one end of a length gauge is set at a predetermined distance from a reference position, the gauge extending through a guide bushing and ring to a snap ring groove. When a predetermined force of a predetermined magnitude is applied to the ring, a preferred thickness of the snap ring is determined from a dimensional change readily accessible from the assembly. A snap ring having substantially the same thickness as the preferred thickness is inserted in the snap ring groove to produce a predetermined compression preload in the spring assembly.
REFERENCES:
patent: 4759234 (1988-07-01), Premiski et al.
patent: 4957195 (1990-09-01), Kano et al.
patent: 4958753 (1990-09-01), Nogle et al.
patent: 5115558 (1992-05-01), Bernhardt et al.
patent: 5337871 (1994-08-01), Testerman
U.S. Ser. No. 08/113,010, filed Aug. 30, 1993, "Device for Supporting a Spring Pack Against Compression Instability Displacement", to Dover.
Boerger, Jr. James G.
Haight Denton R.
Voeffray James F.
Ford Motor Company
Hughes S. Thomas
May Roger L.
McKenzie Frank G.
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