Abstract: A door closer, including: an anchor assembly, including: a frame mounting plate which is fixable relative to a door frame; and an adjustor plate; and an actuator assembly for mounting within the thickness of a door leaf to move the door leaf between open and closed configurations relative to the door frame, the actuator assembly including an operating member coupled by a link to the adjustor plate and mounted for a range of movements between a fully retracted position, in which the anchor assembly is held adjacent the actuator assembly when the door leaf is in the closed configuration, and an extended position, in which the anchor assembly is in spaced relation to the actuator assembly when the door leaf is in the open configuration, the link being configured to extend from the adjustor plate along a first axis, wherein the frame mounting plate is provided with one or more slot(s), the or each slot being elongated along a second axis, the second axis being generally orthogonal to the first axis.

Abstract: A door closer, including: an anchor assembly, including: a frame mounting plate which is fixable relative to a door frame; and an adjustor plate; and an actuator assembly for mounting within the thickness of a door leaf to move the door leaf between open and closed configurations relative to the door frame, the actuator assembly including an operating member coupled by a link to the adjustor plate and mounted for a range of movements between a fully retracted position, in which the anchor assembly is held adjacent the actuator assembly when the door leaf is in the closed configuration, and an extended position, in which the anchor assembly is in spaced relation to the actuator assembly when the door leaf is in the open configuration, the link being configured to extend from the adjustor plate along a first axis, wherein the frame mounting plate is provided with one or more slot(s), the or each slot being elongated along a second axis, the second axis being generally orthogonal to the first axis.

Abstract: 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 and mounted for a range of movements between a retracted position and an extended position, a resilient driving apparatus arranged to exert a driving force on the operating member, a damper mechanism operatively connected to the operating member so as to damp movement of the operating member at least in a direction towards the retracted position, and a resilient thrust device arranged to exert an increased driving force on the operating member over a defined part of its range of movement as the operating member approaches the retracted position.

Abstract: 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 and mounted for a range of movements between a retracted position and an extended position, a resilient driving apparatus arranged to exert a driving force on the operating member, a damper mechanism operatively connected to the operating member so as to damp movement of the operating member at least in a direction towards the retracted position, and a resilient thrust device arranged to exert an increased driving force on the operating member over a defined part of its range of movement as the operating member approaches the retracted position.

Abstract: 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 that point. The position at which the augmented closing force is applied is variable, with a cam mechanism being used to control application of the increased closing force.

Abstract: 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 spring means (45) and coupled to said anchor member (10) to draw the door towards the door frame. An adjustable fluid-filled damper (50) is coupled to said operating member (30) and arranged to provide variable regulation the rate of movement of the operating member under the force of said spring means (45). Resilient thrust means (85) are arranged to exert an increased driving force of said operating member (30) and adjustable control means (100) are provided whereby said thrust means (85) is operative to augment the driving force to said operating member (30) over a defined but variable part of said range of movement corresponding to movement of the door over the final part of its movement into its closed position.

Abstract: 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 at a rate controlled by a fluid-filled damper which comprises a cylinder containing hydraulic fluid, a piston slidable longitudinally of said cylinder and dividing the cylinder into two chambers and a flow restriction assembly associated with the passageway incorporated in said piston to limit the rate of flow of hydraulic fluid from one chamber to the other when the piston is moving in the door-closing direction. The flow restriction assembly defines a flow-restricting passageway including a slot and to enable to flow restriction imposed on the hydraulic fluid to be adjusted when the door closer is installed and in use, the effective length of the slot is variable by relative positional adjustment of two elements by which the slot is defined.

Abstract: A door closer of the door check type includes a housing (10) for assembly with a door and supporting a pivotally mounted lever (21) and driving spring member (32) arranged to drive the lever (21) in an operative direction, and keep member (40) for assembly with a door frame to be engaged by said lever (21) and cooperate therewith to pull the door towards the door frame. The housing (10) includes an elongate body (15) which houses the driving spring (32) and a mounting plate (11) at one end of the body (15) whereby the housing body (15) may be mounted within the thickness of the door with the mounting plate (11) secured at an edge face thereof. The keep member (40) includes a keep body (44) which defines a recess (43) adapted to receive the lever (21) and a mounting flange (41) whereby the keep body (44) may be recessed into the door frame with the mounting flange (41) secured at an edge face of the door frame which is presented towards the edge face of the door at which the housing body (15) is mounted.

Abstract: A sealing ring (10) includes a plurality of circumferentially spaced axially directed projections (20) on one radial face thereof. In use, the sealing ring is located within a seating groove which is wider than the spacing between the radial faces a (11,12) of the sealing ring, the projections (20) holding the ring against axial movement within the groove while allowing the ring to swell in the axial direction in between the projections so as to maintain the dimensional stability of the outer face (14) of the ring. The sealing ring is particularly useful in uni-directionally operative hydraulic dampers and door closers incorporating such dampers.