Fusible Connector Disengages Pawl Or Catch Patents (Class 49/8)
  • Patent number: 8881455
    Abstract: The present invention provides an automatically closed fire protection louver device, which is installed on a window or the like in an apartment building without a balcony function or in a curtain wall type building structure to adjust natural lighting and automatically block spread of flames to an upper floor without using electrical energy when a fire breaks out.
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: November 11, 2014
    Assignee: GL World Tech C&S Ltd. Co.
    Inventors: Yoo Sun Ro, Young Gon Ro
  • Patent number: 7574826
    Abstract: An emergency door opening actuator includes electrical switches that are at least one of normally open and normally closed. The electrical switches may be connected accordingly in parallel or in series to terminals of an overhead door operator. The terminals may correspond to a push button circuit, an obstruction sensing circuit, an alarm system circuit, and/or a door opening circuit. The emergency door opening actuator may take advantage of a protocol in the operator to cause the overhead door to open during an emergency condition to facilitate egress. Likewise, the emergency door opening actuator may cause that the overhead door cannot close by signaling the protocol in a predetermined way when the switches are actuated by an emergency condition. The electrical switches may be mechanically actuated when at least one fusible link is broken. The emergency door opening actuator may include an automatic mechanical stop and/or a test release mechanism.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: August 18, 2009
    Inventor: Rob J. Evans
  • Publication number: 20090108245
    Abstract: A door hoist includes a bracket, drive sprocket, ring gear, hub assembly, set of planetary gears, and governor shaft. The drive sprocket has a drive sprocket axis. The ring gear is fastened to the drive sprocket. The ring gear has a ring gear axis that is in alignment with the drive sprocket axis. The hub assembly includes a connector to receive a door drive shaft and secure the door drive shaft in a fixed rotational alignment with the hub assembly. The set of planetary gears is rotationally mounted to the hub assembly. The set of planetary gears is configured to mate with the ring gear. The governor shaft includes a sun gear, brake assembly, and link. The sun gear is configured to mate with the set of planetary gears. The brake assembly has an engaged position and a disengaged position. The sun gear is rotationally fixed relative to the bracket in response to the brake assembly being in the engaged position.
    Type: Application
    Filed: October 24, 2007
    Publication date: April 30, 2009
    Inventors: Mark Daus, Alvin Eiterman
  • Patent number: 7028431
    Abstract: A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame, a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the vent of fire, by releasing gas from a supporting gas spring.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: April 18, 2006
    Assignee: Nystrom, Inc.
    Inventors: Jalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
  • Publication number: 20040045219
    Abstract: A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame, a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the vent of fire, by releasing gas from a supporting gas spring.
    Type: Application
    Filed: September 5, 2003
    Publication date: March 11, 2004
    Applicant: Nystrom, Inc.
    Inventors: Jalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
  • Patent number: 6615544
    Abstract: A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame; a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the event of fire, by releasing gas from a supporting gas spring.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: September 9, 2003
    Assignee: Nystrom, Inc.
    Inventors: Jalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
  • Patent number: 6161348
    Abstract: A drop-out fire vent for a building has a plastic dome that softens and loses structural integrity with increasing temperature. However, the dome is prevented from dropping out by an internal trap door controlled by a fusible link that will release at a precise temperature. This allows the vent to be used in combination with sprinkler systems such as ESFR systems that require opening of the vent at a precise temperature after the sprinklers have been triggered.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: December 19, 2000
    Assignee: C/S Construction Specialties Limited
    Inventor: Richard P. Morris
  • Patent number: 6092334
    Abstract: A door locking device for locking a door in predetermined, opened positions and automatically unlocking the door from the open positions in the event of a fire. The door locking device comprises a rotating body which includes channels and a support body which includes guide grooves separated by locking grooves. The rotating body and support body are operatively connected together. A locking device which includes locking balls mounted on springs extends through the channels for selective spring biased engagement of the locking balls with the locking grooves or guide grooves of the support body. A heat detection device is operatively connected to the locking device, the heat detection device including a heat-sensitive material. If the door locking device is exposed to a predetermined amount of heat, the heat-sensitive material loses its shape, causing the locking device to permit the locking balls to move from the locking grooves to the guide grooves for releasing the locking device.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: July 25, 2000
    Inventor: Young Jo Kim
  • Patent number: 5794382
    Abstract: A fire-rated removable mullion, includes a top fitting mounted to a door frame lintel, a bottom fitting assembly, a mullion head capable of detachably engaging the top fitting, a mullion tube having provisions for mounting between the mullion head and the bottom fitting assembly, and another provision for accommodating thermal expansion of the mullion assembly to resist warping of the assembly. Where desired, a mortise cylinder lock can be included to limit removal by unauthorized persons.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: August 18, 1998
    Assignee: Von Duprin, Inc.
    Inventor: Matthew S. Prucinsky
  • Patent number: 5582472
    Abstract: An improved storage cabinet is provided which is particularly suitable for the safe storage of flammable materials. An embodiment of the cabinet includes two side-by-side doors which close toward each other. Each door is self-closing, being biased in a closed position by a spring. For convenience, each door can be retained in an open position by a chain. The chain includes a fusible link which melts in the presence of a dangerous level of heat, allowing the associated door to close. In order to protect the interior, the doors have overlapping edges. Accordingly, the cabinet has a closing synchronization mechanism which causes the dual doors to close in a predetermined order. Sequential closing is necessary to effect a proper overlapping of door edges, providing a heat shield. Furthermore, the doors are self-latching, as one door has an independent, three-point latching arrangement which engages the cabinet housing at the top and bottom as well as the first-closed door.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: December 10, 1996
    Assignee: Kewaunee Scientific Corporation
    Inventors: S. Ross Lyons, Kurt Rindoks
  • Patent number: 5335451
    Abstract: A heavily insulated emergency smoke hatch door is equipped with an operating mechanism which is located external to a cooler and/or freezer. This external location of the operating mechanism provides for the accommodation of heavier weight doors without effecting the venting area or access to the interior of the cooler and/or freezer. A latching mechanism keeps the door in the closed position and may be equipped with an automatic release device which will release the door upon sensing of a fire for heat within the cooler and/or freezer. Once the hatch door is released, the operating mechanism is operable to open the door for venting and access.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: August 9, 1994
    Assignee: Aluma Shield Industries, Inc.
    Inventor: Frank C. Druzynski
  • Patent number: 5261186
    Abstract: A fire door closure reset system including a fire door movable between an opened position and a closed position relative to an opening through a wall; a lock for being pivotally attached relative to the wall for movement between a locked position and an unlocked position and for allowing the fire door to move to the closed position when in the unlocked position; a spring for urging the lock to the unlocked position; a cable having a first end for being attached to the lock and having a second end for being fixedly attached relative to the wall; the lock being held in the locked position when the cable is taut; the spring urging the lock to the unlocked position when slack is placed in the cable; occurrence responsive structure for placing slack in the cable in the event of a predetermined occurrence; and a test-reset mechanism for allowing the operation of the fire door closure reset system to be tested by placing slack in the cable and for allowing the slack in the cable to be subsequently removed after the
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: November 16, 1993
    Assignee: F. L. Saino Manufacturing Co.
    Inventor: Felix H. Saino
  • Patent number: 4648310
    Abstract: An apparatus for controlling smoke in the event of a fire. The apparatus has a manual release arm pivotally secured to a base surface and a spring with one end attached to the base surface and the other end connected to the manual release arm. A releasing arm is pivotally connected to the base surface, and a fire linkage is pivotally secured to the base surface and releasably engages the releasing arm and the manual release arm. A bar under tension releasably engages the releasing arm such that when the releasing arm pivots and releases the bar, the bar travels away from the releasing arm due to the tension. A method for controlling smoke, or like, in the event of a fire.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: March 10, 1987
    Inventors: Jimmie E. Wescoat, William M. George
  • Patent number: 4555981
    Abstract: A damper operator for use with a damper having a frame and a damper blade pivotally associated with the frame, which damper operator comprises a drive rod; a pair of lever arms which are pivotally associated with each and which extend between the drive rod and a pivoting mechanism associated with the blade of the damper; and a latching mechanism which extends between portions of each of the lever arms, and which permits selective engagement and disengagement between those portions of the lever arms, and accordingly, selective respective rotation of the lever arms, so that the blade of the damper can be urged toward a predetermined orientation; and biasing means to urge the damper closed when the arms are disengaged; and means to prevent the blade from opening when the arms are disengaged and the blade has been biased shut.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: December 3, 1985
    Inventor: Francis J. McCabe
  • Patent number: 4531534
    Abstract: A spring-powered actuator especially for operating devices such as fire and/or smoke dampers, doors, hatches, vents, traps, valves and other devices having components which are movable between at least two positions. The spring-powered actuator of the invention comprises a longitudinally-displaceable re-wind screw which is rotatable to recharge the spring of the actuator, and a tilting element on the screw which is mounted for tilting movement with respect to the screw axis to allow longitudinal movement of the re-wind screw so as to permit rapid and reliable release of energy stored in the spring. When used in a combination fire and smoke damper, it thus opens or closes the blades of the latter.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: July 30, 1985
    Assignee: Actionair Equipment Limited
    Inventors: Robert J. Magill, David J. Gaiger, Neil Simkins
  • Patent number: 4517765
    Abstract: A motion transmitting remote control assembly of the type for transmitting motion in a curved path to open from a remote location at least one vent door which is held in a closed position by latches which engage the door, the assembly including core elements for transmitting linear motion along a curved path and an actuator for actuating the linear motion of the core elements. Conduits guide the path of the core elements. The core elements include a portion extending from the conduits and adapted to be operatively connected to the latches of the vent door whereby operation of the actuator actuates linear motion of the core elements to disengage the latches from the vent door.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: May 21, 1985
    Assignee: Teleflex Incorporated
    Inventor: Basil Mucha
  • Patent number: 4472999
    Abstract: A damper operator for use with a damper having a frame and a damper blade pivotally associated with the frame, which damper operator comprises a drive rod; a pair of lever arms which are pivotally associated with each and which extend between the drive rod and a pivoting mechanism associated with the blade of the damper; and a latching mechanism which extends between portions of each of the lever arms, and which permits selective engagement and disengagement between those portions of the lever arms, and accordingly, selective respective rotation of the lever arms, so that the blade of the damper can be urged toward a predetermined orientation.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: September 25, 1984
    Inventor: Francis J. McCabe
  • Patent number: 4437693
    Abstract: The invention comprises a latching and unlatching device for use on a door, or bulkhead, or the like, which device has a blocking plate for internally obstructing the latch to prevent its retraction, thereby to prevent the opening of the door. The blocking plate is internally secured in place, in an intermediate slidable position, where it does not obstruct the latch, by a low melting point cover. In the presence of excessive heat, as on the occurence of fire, the cover melts; this allows the blocking plate to slide to another, operative position in which it prevents the retraction of the latch and, consequently, the unlatching of the device. The method comprises the steps to be undertaken to modify an off-the-shelf latching and unlatching device to insure that it will be held securely latched in the presence of fire or excessive heat, and the kit sets forth the structure elements required for the aforesaid modification of off-the-shelf, latching and unlatching devices.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: March 20, 1984
    Assignee: Von Duprin, Inc.
    Inventor: Maksimilijan Godec
  • Patent number: 4372081
    Abstract: A window guard intended to safeguard a window of a dwelling and is constructed so that a portion thereof may be slidably moved away from its normal SAFEGUARD or UP position to provide an escape route for the inhabitants of the dwelling in the event of fire. The window guard is particularly characterized by structure responsive to the heat of a fire in automatically providing such escape route, even though all the while an intruder is denied the convenience of utilizing the window, to which the guard may be attached, for gaining unwarranted entrance into the dwelling.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: February 8, 1983
    Inventor: Joseph Forgione
  • Patent number: 4112620
    Abstract: A new and improved smoke and heat vent including a frame assembly pivotally attached to a curb member adapted for placement on the roof of a building or the like. The frame assembly supports a dome-shaped cover and is movable between a closed, dome supporting position and an open, released position in which the dome-shaped cover is allowed to fall or slide downwardly by itself to clear an opening for the escape of heat and smoke under emergency conditions. The initial fall of the dome-shaped cover is retarded to remove any extra load such as snow on the cover and the cover is caught by several bands attached to the curb member so that it will not fall to a floor below.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: September 12, 1978
    Assignee: Plasteco, Inc.
    Inventor: Kiyoshi Sandow
  • Patent number: 4090437
    Abstract: Compact and autonomous device of high power for the opening of a smoke and heat vent, placed between the fix and the opening frame of the vent and composed of a fix arm forming the fix frame and a pivoting arm, the opening force being transmitted to the opening frame by means of a hinge fixed on a fitting piece gliding in the pivoting arm, which is retained in a closed position by means of a pivoting hook, driven by different pulling means, among which a pivoting lever kept in a retaining position by an electro-magnet, all forces and tensions being entirely taken up within the autonomous device and working in vertical and parallel planes, which are very close to one another.
    Type: Grant
    Filed: July 16, 1976
    Date of Patent: May 23, 1978
    Inventor: Pierre Emmanuel Eugene Jean Bogaert
  • Patent number: 4068417
    Abstract: A wall vent preferably for use in a high-rise building is releasably opened for venting a fire in the building. The vent comprises a frame, a window or venting panel that is pivotally for biasing the venting panel to an open position and latch means for maintaining the panel in a closed position. The latch means may be either manually or electrically released or released upon detection of heat or smoke, and may be released either at the panel or remotely. Each wall vent is also preferably releasable to an open position from a story of the building therebelow.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: January 17, 1978
    Assignee: Wasco Products, Inc.
    Inventors: Joseph R. Anghinetti, Paul A. Couture
  • Patent number: 3983599
    Abstract: A temperature actuated keying device for use in an automatic door closing mechanism which comprises a pair of thin, long plates for clamping members pivotally connected to each other at overlapping ends thereof by a pin so that both plates can be opened or closed in the same plane relative to the pin as in scissors, a washer portion and a spring provided between the clamping members and a fuse plate consisting of a pair of component plates connected by a fusible material to each other to form the fuse plate which is removably mounted between the other ends of the clamping members. The keying device is attached to a door closing mechanism to hold the door open in normal condition, and to release the door to close in case of emergency when the fusible material melts to separate the fuse plate, thereby opening the keying device.
    Type: Grant
    Filed: April 3, 1974
    Date of Patent: October 5, 1976
    Assignee: Daihatsu Diesel Mfg. Co., Ltd.
    Inventor: Osamu Takashiro