Load compensating hydraulic rate control

Details Load compensating hydraulic rate control Load compensating hydraulic rate control

2011-06-28

2011-06-28

Schwartz, Christopher P (Department: 3657)

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

C188S322150

Reexamination Certificate

active

07967116

ABSTRACT:
A rate control device includes an outer cylinder defining an interior chamber having a longitudinal axis and containing a hydraulic fluid. A piston head mounted to a proximal end or a piston rod is slidably positionable within the interior chamber. A rate control valve is disposed within an interior cavity of the piston head coaxially with the longitudinal axis of the interior chamber of the cylinder. The rate control valve includes a variable flow rate orifice and a fixed flow rate orifice disposed in series relationship with respect to fluid flow through the rate control valve.

REFERENCES:
patent: 3999745 (1976-12-01), Mahoff
patent: 5251655 (1993-10-01), Low
patent: 5303804 (1994-04-01), Spiess
patent: 5409088 (1995-04-01), Sonsterod
patent: 5450933 (1995-09-01), Schuttler
patent: 6161662 (2000-12-01), Johnston et al.
patent: 6179100 (2001-01-01), Mintgen et al.
patent: 6874731 (2005-04-01), Brauer et al.
Product Information Sheet from www.microhydraulics.com, 3 pgs.

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