Abstract: In order to make use of disused chimneys within residences, a passive heat recovery and ventilation system is fitted within a chimney of a house, the system including inlet and outlet flow ducts fitted within the chimney flue, and extending to the chimney top, and a passive heat recovery device (2) located at the chimney top including a heat exchanger part (6) located in the chimney flue and having air inlet and air outlet ports (24, 26) communicating with the flow ducts, and including an air flow part (4) positioned on top of the chimney which replaces the chimney pot, and which exhausts stale air and draws in ambient air. The air flow part includes a turbine ventilator (18) for drawing out stale air, and a circular array of louvred air inlets (11, 12) for permitting inflow of fresh air.

Abstract: A rose locking mechanism developed with a hybrid lock architecture for a door designed to incorporate the functionality of a cylindrical lock architecture with the ease of installation of a tubular lock architecture is provided by the present invention. The hybrid lock architecture comprises a chassis assembly having an inside chassis assembly and an outside chassis assembly that are telescopically engaged to accommodate different door widths. A door latch assembly is operably connected to the chassis assembly for retroaction and extension of a bolt. A handle is mounted on a spindle on either side of the chassis assembly wherein rotational motion imparted on one of the handles is converted to linear motion within the chassis assembly in order to retract the bolt of the door latch assembly. The inside chassis assembly includes a rose locking mechanism positioned radially outward of said inside spindle.

Abstract: A convertible door latch assembly convertible between a non-locking configuration and a locking configuration. The convertible door latch assembly including a bolt housing, a bolt slidably engaging the bolt housing and having a first slot and a second slot, a drawbar slidably engaging the first slot and the bolt housing, a dead latch stop being engagable in the first slot to hold the drawbar in the first slot when the convertible door latch assembly is in the locking configuration, a plunger being slidably engagable in the second slot and being movable between an extended position and a retracted position when the convertible door latch assembly is in the locking configuration, and a pull slidably positionable within the first slot and moveable relative to the bolt when the convertible door latch is in the non-locking configuration.

Abstract: A push button door locking mechanism including a push button mounted on a push button carrier housed within an inside spindle of a door lock assembly, a main retractor co-rotatingly attached to the spindle, and an inner cam aligned axially with the push button carrier. The inner cam has a flange portion extending substantially perpendicularly from a driver bar portion of the inner cam. The locking mechanism also includes a locking catch assembly having a first end and a second end. The first end includes a head portion formed to matingly engage the push button carrier. The second end is coupled to a locking wing. The locking catch assembly has a locked position wherein the locking wing matingly engages the flange preventing rotation of the flange with respect to the main retractor and an unlocked position allowing rotation of the flange with respect to the main retractor.

Abstract: A slide compartment for a hybrid lock architecture. The slide component comprises a U-shaped body portion and a plurality of independent retractors. At least one pair of slots are positioned near an open end of said U-shaped body for attachment of a drawbar of a door latch assembly of the hybrid lock assembly. The hybrid lock assembly comprises a chassis assembly mounted in a bore of said door. A door latch assembly is operably connected to the slide component housed in the chassis assembly for retraction and extension of a bolt. A handle is mounted on a spindle on each side of the chassis assembly. Rotational motion of either handle is converted to linear motion within the chassis assembly at the slide interface in order to retract the bolt of the door latch assembly.

Abstract: A slide component developed for a hybrid lock architecture designed to incorporate the functionality of a cylindrical lock architecture with the ease of installation of a tubular lock architecture is provided by the present invention. The slide component comprises a U-shaped body portion and a plurality of independent retractors. At least one pair of slots are positioned near an open end of said U-shaped body for attachment of a drawbar of a door latch assembly of the hybrid lock assembly. The hybrid lock assembly comprises a chassis assembly mounted in a bore of said door. A door latch assembly is operably connected to the slide component housed in the chassis assembly for retraction and extension of a bolt.

Abstract: A convertible door lock latch mechanism designed in a first embodiment as a new dead latch assembly and easily converted to a second embodiment as a spring latch assembly. The dead latch assembly comprises a drawbar, slidably attached to a bolt by a dead latch stop, and a dead latch plunger, all housed in a bolt housing. The bolt and the dead latch are biased in an extended position at least partly protruding from said bolt housing. The dead latch assembly is easily converted to a spring latch assembly by removing the dead latch plunger, removing the dead latch plunger spring, and removing the dead latch stop. A pull component is then attached to the bolt. The convertible door lock latch mechanism also provides an optional restore component which causes retraction of a drawbar when a bolt of the door lock latch mechanism is depressed. The door latch assembly utilizes a restore component positioned between a drawbar and a bolt of the latch assembly.

Abstract: A push button door locking mechanism developed for a hybrid lock and architecture designed to incorporate the functionality of a cylindrical lock architecture with the ease of installation of a tubular lock architecture. The push button door locking mechanism comprises a push button mounted on a push button carrier housed within an inside spindle of a door lock assembly. A main retractor is co-rotatingly attached to the inside spindle. A locking catch assembly having a head portion on a first end thereof wherein the head portion matingly attaches to the push button carrier, and a locking catch engageable against the retractor component in a manner preventing axial movement of the locking catch assembly. A push button spring biases the locking catch assembly in an unlocked position. The present invention also relates to a lock assembly for a door comprising a chassis assembly mounted in a bore of the door including an inside chassis assembly and an outside chassis assembly.

Abstract: A rose locking mechanism developed with a hybrid lock architecture for a door designed to incorporate the functionality of a cylindrical lock architecture with the ease of installation of a tubular lock architecture is provided by the present invention. The hybrid lock architecture comprises a chassis assembly mounted in a bore of the door including an inside chassis assembly and an outside chassis assembly. The inside chassis assembly and the outside chassis assembly are telescopically engaged to accommodate different door widths. A door latch assembly is operably connected to the chassis assembly for retraction and extension of a bolt. A handle is mounted on a spindle on either side of the chassis assembly wherein rotational motion imparted on one of the handles is converted to linear motion within the chassis assembly in order to retract the bolt of the door latch assembly. The inside chassis assembly includes a rose locking mechanism positioned radially outward of said inside spindle.