Expansible chamber devices – Piston – With fluid passage in piston face
Patent
1998-09-08
2000-07-18
Ryznic, John E.
Expansible chamber devices
Piston
With fluid passage in piston face
B01D 1900
Patent
active
060891424
ABSTRACT:
A piston (3) for a hydraulic dashpot for motor vehicles, mounted on one end of a piston rod (1) and dividing a cylinder (5) into a two compartments (6 & 7), with two groups of lines (8 & 9) arranged more or less in concentric circles and more or less paralleling the piston rod and conveying hydraulic fluid in opposite directions, and with disk-shaped check valves, to some extent in the form of stacks (15 & 26) of cup springs, at each end that block one group of lines in one direction at a time, whereby the valve that blocks the inner lines (8) comprises either two separated springs (11), one above the other, or a stack (15) of springs, whereby the springs or stack nearer the outlet (10) from the inner lines maintain or maintains one cross-section open for the fluid to flow through, and whereby, when the pressure of the fluid increases, the spring or stack at the other end opens another cross-section for the fluid to flow through and the valve that blocks the outer lines opens intakes into the inner lines. The object is an improved piston with simple means of obtaining a degressive curve in both phases. The valve that blocks the outer lines accommodates a resilient cap (21) that covers their outlets (19) and rests by way of a separated ring (22) against another resilient component at the end facing away from the outer lines.
REFERENCES:
patent: 277305 (1883-05-01), Maltby
patent: 3827538 (1974-08-01), Morgan
patent: 5259294 (1993-11-01), May
Adrian Adolf
Angermann Dr.-Ing. Rolf
Fogiel Max
Krupp Bilstein GmbH
Ryznic John E.
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