Piston Adder Shock Absorber
Original Publication Date: 1980-Oct-01
Included in the Prior Art Database: 2005-Feb-13
This device reduces deceleration shocks on assemblies powered by linear or rotary discrete-position hydraulic drives. The use of a statically pressured piston adder pair provides shock absorption but also full-force discrete end-point positioning. It is composed of a piston adder with two equal-displacement segments, as shown in the drawing. The segments are powered by steady-state hydraulic pressure into a position with one extended and one retracted. An orifice is included between each piston's low pressure end and the ambient return line. Each orifice would typically be adjustable to allow the transfer of its piston in an optimal length of time for minimizing deceleration shock on the particular mechanism involved.