Patent ID: 6029708
Filing Date: 2000-02-29
Classification: F16L

Abstract:
A pulsation damper for damping noises in a hydraulic elevator, the elevator having pressurized hydraulic fluid flowing in a line for operating the elevator, the damper comprising:a housing having a chamber formed therein, at least a pair of inlet/outlet openings formed in sides of said housing in communication with said chamber and adapted to be connected to a hydraulic fluid line of a hydraulic elevator, and at least one end opening formed in an end of said housing in communication with said chamber;a compression element positioned at said one end opening and having a peripheral flange;an end cap attached to said housing trapping said peripheral flange between said end cap and said housing about said one end opening thereby sealing said one end opening from passing pressured hydraulic fluid from said chamber;a pressure plate positioned between said end cap and said compression element; anda fastening element connected to said pressure plate and extending through said end cap for selectively pressing said pressure plate against said compression element to adjust a resistance of said compression element to expansion of pressured hydraulic fluid in said chamber whereby when said inlet/outlet openings are connected to a hydraulic elevator line and pressured hydraulic fluid flows through said chamber, said compression element absorbs pulsation energy present in the pressured hydraulic fluid flowing through said chamber to dampen noises.