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| Number | Title | Issue Date |
| 7356878 | Door closer A door closer includes an anchor assembly for mounting on a door frame, an actuator assembly for mounting within the thickness of a door which is hinged for movement between open and closed positions, an operating member coupled by a linkage to the anchor assembly a... | 04/15/2008 |
| 7219391 | Door assembly with concealed door closer A door assembly and a door closer arranged and constructed so as to be wholly concealed within the associated door, yet is rendered readily accessible to effect the adjustment thereof to regulate or control the closing speed of the associated door. The door closer i... | 05/22/2007 |
| 6976289 | Door closer with door arresting mechanism A door closer having a door arresting mechanism to arrest a door in an opened position that includes a cylinder and piston assembly wherein the arresting mechanism includes a cam member having an arresting dwell cam profile and an indexing profile, and an associated... | 12/20/2005 |
| 6886217 | Door closer A door closer having a pair of main driving springs, a fluid-filled damper arrangement and a pair of thrust springs is provided, the thrust springs coming into effect during the latter part of a door closing operation, so as to provide an augmented closing force at ... | 05/03/2005 |
| 6735820 | Apparatus for closing sliding doors An automatic door closer for a sliding door. The closer has a reel with a cable extending around a pulley on the end of the rod of a return mechanism. In preferred embodiments, the return mechanism is an oil dammed gas spring or a magnetic spring. A spool rotates on... | 05/18/2004 |
| 6625847 | Door closers A door closer comprises an actuator assembly (20) adapted for fitting within the thickness of a door and an anchor member (10) adapted for fitting in a door frame in opposed relation to said edge face of the door. An operating member (30) is driven by spr... | 09/30/2003 |
| 6442796 | Air damper An air damper consists of a tubular cylinder with opposite ends, a piston movable in the cylinder, a first coil spring for resiliently biasing the piston in the direction of one end of the cylinder, a string for transferring dampening effect produced by a... | 09/03/2002 |
| 6240598 | Arrangement for controlling an angularly movable member A control mechanism for use with a door closer, comprises a shaft (10), angularly movable between a normal position and a second position, the shaft (10) having a first portion (21a) and a second portion (21b), a brush spring (35) attached to the shaft fi... | 06/05/2001 |
| 5722114 | Gate closure mechanism Invention is directed to a compression spring mechanism, particularly in combination with a fencing system which incorporates a swinging gate. The mechanism, intended to automatically close a released and opened gate, comprises a cylindrical tube, mounted... | 03/03/1998 |
| 5706551 | Door closers and dampers primarily for door closers A door closer for hingedly mounted doors comprises an actuator adapted for fitting within the thickness of a door and an anchor member adapted for fitting in a door frame such that when installed the closer acts to draw the door into a position of closure... | 01/13/1998 |
| 5432977 | Door Closers The door closer is of the kind which acts, for example between a door hinge stile and a hinge jamb and has a body for mounting usually in the stile, from which body a spring-biased tension member extends correspondingly for anchoring to an anchoring point... | 07/18/1995 |
| 5016317 | Lightly-operating automatic door closer with double cylinders An automatic door closer includes: a casing having a primary and a secondary cylinder juxtapositionally formed in the casing for resiliently holding two pistons in the two cylinders filled with a hydraulic oil and partitioned with a wall formed with a mai... | 05/21/1991 |
| 4991256 | Door closers In a door closer comprising spring means (17) within a housing (10) adapted for mounting with the thickness of the door (12) and an anchor member (30) adapted for mounting on a door frame (32), a tension member (20) whereby the spring means draws the anch... | 02/12/1991 |
| 4317254 | Door closer A door closer includes a tension member comprising spaced shafts acted by springs and connected to articulated chains which are coupled to an anchor plate secured to the door frame. Movement of the shafts is under the control of a uni-directionally operat... | 03/02/1982 |
