Patent ID: 8181311
Filing Date: 2012-05-22
Classification: E05F,E05Y,Y10S,Y10T

Abstract:
1. An adjustable hinged door closer apparatus comprising: a seat having a hollow space, said hollow space having a hydraulic chamber and an actuating groove and a first cylinder and a second cylinder therein, said first cylinder being in parallel relation to said second cylinder, said actuating groove positioned at one end of said hydraulic chamber, said first cylinder and said second cylinder being positioned separately at an opposite end of said hydraulic chamber, said first cylinder having a first end cover screwed into an end thereof, said second cylinder having a second end cover screwed into an end thereof; a connecting duct arranged between said first cylinder and said second cylinder, said connecting duct connecting said first cylinder and said second cylinder; a throttle valve positioned on said connecting duct so as to regulate hydraulic pressure; a connecting seat assembled within said actuating groove of said seat so as to be swingable in relation thereto, said connecting seat having a pivot protruding from a center thereof; a first elastic linkage unit having a first connecting rod and a first spring and a first piston, said first connecting rod having an interior linked to said connecting seat, said first connecting rod having an exterior linked to said first end cover, said first spring being sleeved onto a periphery of said first connecting rod, said first piston positioned adjacent to said exterior of said first connecting rod and positioned within said first cylinder of said seat, said first piston having a circular retaining surface and a hollow cylinder, said hollow cylinder having a tank formed therein, said tank having an internal tapped hole; a second elastic linkage unit having a second connecting rod and a second spring and a second piston, said second connecting rod having an interior linked to said connecting seat, said second spring sleeved onto a periphery of said second connecting rod, said second piston installed at an exterior of said second connecting rod and located within said second cylinder of said seat, said second piston in spaced relation to said second end cover; a double-threaded regulator incorporated onto said first connecting rod of said first elastic linkage unit, said double-threaded regulator having a double-threaded column connected to said interior of said first connecting rod, said double-threaded column having a double-thread that shifts to a pair of thread pitches during a single rotation, said double-threaded column having a pair of threaded cutting portions at an end thereof, said end of said double-threaded column screwed into said tapped hole of said tank of said first piston; and a rotating lever assembled into said tank of said hollow cylinder of said first piston, a straight groove and a bulge being embedded between said rotating lever and said tank, said rotating lever driving said first piston so as to rotate simultaneously, said rotating lever having a tool drivingly penetrating said first end cover and positioned externally thereto, said first spring having an external diameter that is greater than an external diameter of said second spring, said actuating groove of said seat having a punch hole at one side thereof, said punch hole threadedly receiving a limitation cover plate, said limitation cover plate having a through-hole at a center thereof, said through-hole receiving said pivot of said connecting seat.