Individually Latched Double Doors Patents (Class 292/DIG21)
  • Patent number: 6120119
    Abstract: An incubator or drying oven is provided having a housing bounding a useful space. The useful space communicates with the exterior through a front opening. An inner door is hingedly mounted to the housing and is configured to selectively cover the front opening. An outer door is also hingedly mounted to the housing and is configured to selectively cover the inner door. Mounted on the housing adjacent to the front opening is a locking element. The locking element has a slot formed on the side thereof. A latching assembly is mounted to the inner door. The latching assembly includes a hub rotatably mounted to the inner door about a first axis, a tongue projecting from the hub and configured to be received within the slot of the locking element, and a handle attached to the hub opposite the tongue. The handle is rotatably connected to the hub about a second axis that is substantailly perpendicular to the first axis. A spring continually biases the handle away from the inner door.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: September 19, 2000
    Assignee: Kendro Laboratory Products, GmbH
    Inventors: Sonja Jelinski, Stefan Ferger, Harald Langen
  • Patent number: 6120071
    Abstract: A mortise latch and vertical rod exit device latches at a center point between two doors and at top points between each door and the door frame. Optionally vertical rods may also be used to latch at bottom points between the doors and the floor. The latch includes an active and a passive latch mechanism operated by corresponding operating mechanisms. The mortise latch mechanisms cooperatively interact so that either door may be opened first, and either door may be closed first, without regard to the position of the other door. The active mortise latch mechanism includes a latch bolt and an activation bolt arranged so that one bolt is retracted when the other is extended, except when the doors are being opened or closed, when both bolts are retracted. The active mortise latch mechanism automatically retracts the latch bolt when the doors are not aligned and automatically extends the latch bolt when the doors are aligned.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: September 19, 2000
    Assignee: Sargent Manufacturing Company
    Inventors: Daniel J. Picard, Darren C. Eller
  • Patent number: 6045167
    Abstract: A self-acting locking bolt for doors or the like, more particularly furniture doors, comprising at least one receiving part on one door leaf or frame, and at least one locking part on the other door leaf or on a door leaf, the locking part having a control connecting-link for a pin of a bolt guided so as to be movable vertically in the locking part, the said pin projecting sideways out of the locking part, in that the locking part is substantially flush with the top edge or bottom edge of the door leaf, in that the bolt does not project, or projects only slightly, beyond the top edge of the locking part when the door leaf is in an open position and projects beyond the top edge into a matching location in an associated frame part when the door leaf is in a closed position, and in that the receiving part has a recess with which the pin of the bolt may be brought into engagement in the locking operation and is pushed along the connecting-link guide and in wich the pin is located when the door leaf is closed.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: April 4, 2000
    Inventor: Heinrich Lauterbach
  • Patent number: 5992188
    Abstract: A door lock system (20) comprising a door frame (22) mounted in an entry (24) of a building (26). An entrance door (28) is hinged at (30) along one side edge to the door frame (22). The entrance door (28) has a standard door lock unit (32) to engage with the door frame (22). A structure (34) is built into the entrance door (28), for engaging with the door frame (22) at a number of other locations thereabout, so that the entrance door (28) will be strengthened against a forced entry. An assemblage (36) is built into the entrance door (28), for retaining the engaging structure (34) to the door frame (22) in a releasing manner. When a person wants to open the entrance door (28) with the stand and a door lock unit (32), the retaining assemblage (36) must first be deactivated to allow the engaging structure (34) to disengage from the door frame (22).
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: November 30, 1999
    Inventor: John A Saunders
  • Patent number: 5901989
    Abstract: A lock system for the inactive door of a two door swinging combination is provided which prevents the active door from being latched or completely closed without locking the inactive door in place against the door frame and/or floor. Further, with the active door closed, the latch of the active door prevents movement of the slider of the inactive door lock mechanism and thereby prevents any unlocking of the inactive door until the latch of the active door has been removed and the active door opened.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: May 11, 1999
    Assignee: Reflectolite
    Inventors: Donald A. Becken, Ivanhoe E. Chaput
  • Patent number: 5816309
    Abstract: A door edge guard for mounting to the leading edges of a pair of bifold doors has a guard body. The guard body has a rear wall, a front wall spaced apart from the rear wall and resiliently deformable panels extending between the front and rear walls. The front wall, rear wall and side panels define a crush zone therebetween. Weather stripping extends forwardly from the front wall to provide a weather barrier.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: October 6, 1998
    Assignee: The Stanley Works
    Inventor: Bruce D. Paradise
  • Patent number: 5803516
    Abstract: A latch assembly for the rear auxiliary door (18) of a pickup truck (10) includes a latch mechanism (34) having a lost motion mechanism (48, 76, 44, 60, 62, 58) which permits or prevents transmission of unlatching movement between a release handle (40) and a release lever (82).
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: September 8, 1998
    Assignee: Ford Global Technologies, Inc.
    Inventor: Conrad Frederick Hempel
  • Patent number: 5709422
    Abstract: A security device for double doors having adjacent handles which comprises a lateral bracing segment which extends across the two handles, a short depending segment connected to the lateral bracing segment by a first loop encompassing the neck of the first handle, and a depending bracing segment connected to the lateral bracing segment by a second loop encompassing the neck of the second handle, where the depending bracing segment extends back across the juncture between the double doors.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: January 20, 1998
    Inventor: James Carl Malone
  • Patent number: 5664815
    Abstract: A safety device (10) for securing dual adjacent cabinet doors, each having a door handle or door knob. The safety device (10) is made of a single rigid rod (10a) made of substantially inflexible, durable material, forming an elongated arm (11) with perpendicularly depending legs (12, 13) with tip ends (12b, 13b) covered by resilient enlargements (14, 15).
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: September 9, 1997
    Inventor: Joe Kornder
  • Patent number: 5590919
    Abstract: A novel t-astragal for use with double swinging doors such as for french doors is disclosed. The t-astragal includes a cap portion perpendicular to a base portion wherein both the cap and base can be formed from wood such as plywood or plastic. The t-astragal is a moulding that extends the full height of the swinging doors. One side of the base portion is fixably coupled to the free end of one of the swinging doors by nails or screws. The free end of the other swinging doors is able to swing up to and against a shoulder portion formed from the cap and base portions. A metal pipe shaped sleeve having an approximate length of one foot is partially positioned along the longitudinal axis of the t-astragal molding. A bolt slides within the sleeve from a rest position to an extended position, where the extended position locks the attached door to a matching slot in the door frame.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: January 7, 1997
    Inventor: John P. Germano
  • Patent number: 5524942
    Abstract: A door lock assembly is provided for secure multipoint locking of a door. The lock assembly comprises a main lock cartridge in combination with one or more remote secondary lock cartridges mounted at one side edge of a door, with the main lock cartridge having an actuator for manipulating a plurality of lock members. In one preferred form for use with a hinged or swinging door, the lock members comprise a plurality of latch bolts movable to a first extended position for normal door latching, or to a second and further extended position to function as multiple deadbolts. In an alternate preferred form for use with a sliding door, the lock members comprise headed latch pins for engaging keeper plates on the adjacent door jamb.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: June 11, 1996
    Assignee: W&F Manufacturing, Inc.
    Inventor: Paul D. Fleming
  • Patent number: 5524941
    Abstract: A door lock assembly is provided for secure multipoint locking of a door. The lock assembly comprises a main lock cartridge in combination with one or more remote secondary lock cartridges mounted at one side edge of a door, with the main lock cartridge having an actuator for manipulating a plurality of lock members. In one preferred form for use with a hinged or swinging door, the lock members comprise a plurality of latch bolts movable to a first extended position for normal door latching, or to a second and further extended position to function as multiple deadbolts. In an alternate preferred form for use with a sliding door, the lock members comprise headed latch pins for engaging keeper plates on the adjacent door jamb.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: June 11, 1996
    Assignee: W&F Manufacturing Inc. a California Corp.
    Inventor: Paul D. Fleming
  • Patent number: 5511836
    Abstract: A device for securing bulkhead doors consists of a single length of rigid, angled metal bar stock that preferably extends across the full internal width of the doors. A pair of elastomeric bumpers located at each end of the bar make contact with the underside of the bulkhead doors or the side pillars on which the doors rest. The bar is braced against the doors by engagement with a retention bracket, which may be the existing bracket already associated with the bulkhead doors.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: April 30, 1996
    Inventor: Gerald K. Murphy
  • Patent number: 5503440
    Abstract: A device for controlling the opening and closing of at least two doors, each enabling access to an enclosure, a single control means adapted to allow separate and controlled access to each of the enclosures. The control means operates locking means for keeping the doors closed or for releasing them, in such a manner that the doors can be simultaneously either all closed at the same time or else at least one open and another closed. The locking means includes, for each door, at least one sliding bolt associated with a receiving seat provided on a corresponding door.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: April 2, 1996
    Assignee: Schlumberger Industries
    Inventor: Jean-Marc Peccoux
  • Patent number: 5498038
    Abstract: A multi-point door lock system comprising an active lock and an inactive lock for use on single or double doors is self-teaching, provides one hand control of shoot bolts, and provides audible and tactile feedback associated with shoot bolt extension and retraction.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: March 12, 1996
    Assignee: Marvin Lumber and Cedar Co.
    Inventors: Ira J. Simon, George W. Curtis, Andrew B. Campbell
  • Patent number: 5295374
    Abstract: A tailgate handle assembly in a housing including a flush-mounted handle and an adjacent key cylinder. The housing is spaced apart from a tailgate latch mechanism. A laterally extending lever is slidably actuated on the housing from a locked mode to an unlocked mode manually by rotation of the key cylinder, or electrically via a power actuator, and then pivoted by manual lift-pulling on the handle, to thereby lift a latch rod extending between the lever and the latch mechanism to actuate the latter. An electrical limit switch is mounted on the handle assembly, adapted to being actuated by one slidable movement of the lever to unlock the latch of an upwardly pivotable tailgate window.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: March 22, 1994
    Assignee: Chrysler Corporation
    Inventors: Frederick F. Bender, Ralph G. Nedbal
  • Patent number: 5216906
    Abstract: A door lock mechanism for a pair of doors oppositely hung on the frame of a cabinet. The door lock mechanism comprises a pair of studs, one to be attached respectively to each door, a lock body to be attached to the frame, and a latch assembly carried on the lock body and provided by a pair of latch members and a spring urging the latch members to their latching positions. Each of the studs has a camming head at its free end which cooperates with a portion of the lock body to guide the stud into a cavity provided in the lock body as the respective door is closed. Each stud is also provided with a recess adapted to receive a detent end portion of one of the latch members to releasably retain the respective door in its closed position.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: June 8, 1993
    Assignee: Herman Miller, Inc.
    Inventor: Andrew J. Kurrasch
  • Patent number: 5197771
    Abstract: A window or a door comprises a stationary frame and two leaf frames. The leaf frames are mounted for pivoting movement about mutually parallel pivot axes. A first leaf frame is intended for more frequent opening and closing, and a second leaf frame is intended for less opening and closing. The second leaf frame can be locked with respect to the stationary frame by drive rods which move in opposite sense and which engage the stationary frame at the respective ends thereof. The first leaf frame is provided with the vertical height of the first leaf frame. This first drive rod is driven by a first drive mechanism. The first drive rod controls transverse bolts for engagement with the second leaf frame. The transverse bolts driven by the first drive rod are located outside the first drive mechanism.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: March 30, 1993
    Assignee: Aug. Winkhaus GmbH & Co. KG
    Inventors: Ludger Kaup, Renate Berning
  • Patent number: 5076620
    Abstract: A flush bolt including override protection is disclosed for flush mounting on the inactive one of a pair of swinging doors. In one embodiment of the invention, an automatic flush bolt comprising a trigger member senses whether the active door is closed. If closed, the flush bolt assumes an engaged position securing a bolt into a securing surface. If open, the flush bolt assumes its disengaged position with the bolt retracted into the mechanism. In a second embodiment of the invention, a semi-automatic flush bolt is provided with a slotted member and a spring to bias the bolt toward the engaged position. When the door containing the mechanism is closed, the bolt may temporarily and automatically override the securing surface and engage the securing surface without damage to the mechanism, the door, or the door frame. Opening the door requires manual intervention through activation of a control member.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: December 31, 1991
    Assignee: Triangle Brass Manufacturing Company
    Inventors: Andrew B. Campbell, Ira J. Simon
  • Patent number: 5035449
    Abstract: A lock device of a door for a cargo room of a wagon type vehicle includes a main lock member disposed at the upper edge of a lower door and having a latch and a ratchet for preventing the reverse rotation of the latch; a main striker disposed at the lower edge of the upper door and engaging with the main lock member; side lock members disposed on both right and left sides of the lower side door; two side strikers engaging with the side lock members; a key operation member disposed on the outer surface of the lower door and releasing the engagement between the main lock member and the main striker; and a door opening handle disposed on the outer surface of the lower door and releasing the engagement between the side lock members and the side strikers.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: July 30, 1991
    Assignees: Mitsui Kinzoku Kogyo Kabushiki Kaisha, Isuzu Motors Limited
    Inventors: Naoki Shiratori, Yoshiaki Ueda, Isami Mitobe
  • Patent number: 5033234
    Abstract: A door coordinator for controlling the closing sequence of a pair of double doors having a common line of closure. The coordinator has a biased trigger which pivots and a door stop which translates toward the rear of the coordinator upon triggering. Override is provided by an override block (preferably pivotally mounted) biased into a first position which moves to a second position upon application of more than threshold override force. With the override block in the second position, the door stop is free to move in translation to the rear of the coordinator and permit closure of the door even if the trigger is not depressed. Threshold override force is adjusted by a screw which adjusts the angular position of a base plate in contact with biasing springs which bias the override block.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: July 23, 1991
    Assignee: Triangle Brass Manufacturing Company
    Inventors: Ira J. Simon, Andrew B. Campbell
  • Patent number: 5028082
    Abstract: A latching mechanism (10) for automatically locking, and selectively unlocking, opposed first and second sliding members (11A and 11B). The latching mechanism (10) has first and second latch subassemblies (45 and 50). The first latch subassembly (45) is adapted to be secured to one sliding member (11A), and the second latch subassembly (50) is adapted to be secured to a second sliding member (11B). A catch block (75) is presented from the first latch subassembly (45). The catch block (70) has a cam portion (76) and a locking portion (80). The first latch subassembly (45) has a pivotally mounted first release lever (65), and the second latch subassembly (50) has a pivotally mounted second release lever (95). A latch arm (106) is presented from the second release lever (95) to engage a cam portion (76) when the sliding members (11A and 11B) are closing and to engage the locking portion ( 80) to lock with sliding members (11A and 11B) in their closed position.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: July 2, 1991
    Assignee: Chardon Rubber Company
    Inventor: Clarence W. Kronbetter
  • Patent number: 5024472
    Abstract: The assembly has an auxiliary bolt which is pivotably mounted in a housing. The bolt is captively journalled by a removable bracket which has a pair of recesses on opposite sides thereof. A shaft integral with the bolt sets in one pair of the recesses, to effect one handed operation of the assembly, and with optional setting of the shaft in the other pair of recesses, the assembly is oppositely handed. The assembly is simply bolted to a faceplate; consequently, by removing such bolts, and removing the bracket, the bolt can be replaced or reversed in its handed disposition. An override spring is provided to protect the assembly from damage, in the event that the associated flushbolt fails to enter the strike or recess provided therefor; the spring allows the auxiliary bolt to fully retract, even through the flushbolt translation is inadequate.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: June 18, 1991
    Assignee: Von Duprin, Inc.
    Inventor: Richard B. Cohrs
  • Patent number: 5005881
    Abstract: A locking mechanism to be applied to an inactive door of a set of active and inactive double doors coordinated so that the inactive door closes first relative to a frame followed by the closing of the active door. Adjustable drive means is employed capable of either lengthwise contraction upon the application of a force between first and second separated locations on the adjustable drive means exceeding a threshold value, or linear movement without substantial contraction upon the application of a force less than the threshold value. A door-lock actuating element is coupled to the adjustable drive means at the first location. A door-locking element is coupled to the adjustable drive means at the second location. The adjustable drive means, the door-lock actuating element, and the door-locking element are supported at an upper or lower corner of the inactive door.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: April 9, 1991
    Assignee: Rixson-Firemark Inc.
    Inventors: Kevin L. Bailey, Richard E. D'Hooge
  • Patent number: 5004277
    Abstract: A flush bolt including override protection is disclosed for flush mounting on the inactive one of a pair of swinging doors. In one embodiment of the invention, an automatic flush bolt comprising a trigger member senses whether the active door is closed. If closed, the flush bolt assumes an engaged position securing a bolt into a securing surface. If open, the flush bolt assumes its disengaged position with the bolt retracted into the mechanism. In a second embodiment of the invention, a semi-automatic flush bolt is provided with a slotted member and a spring to bias the bolt toward the engaged position. When the door containing the mechanism is closed, the bolt may temporarily and automatically override the securing surface and engage the securing surface without damage to the mechanism, the door, or the door frame. Opening the door requires manual intervention through a activation of a control member.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: April 2, 1991
    Assignee: Triangle Brass Manufacturing Company
    Inventors: Andrew B. Campbell, Ira J. Simon
  • Patent number: 4948182
    Abstract: A cover locking apparatus for a record medium player having two covers movably attached to the player under a bias which includes a lock assembly including a first lock member correspondingly to one cover and a second lock member correspondingly to the other cover, an engaging portion on each cover for interacting with the first and second lock members, respectively, for engaging the covers in a closed positions wherein the covers are held against the bias and a lock release mechanism including only a single manual release button for releasing both the covers from the closed position.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: August 14, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Akira Ishikawa
  • Patent number: 4930836
    Abstract: An improved door assembly, especially for pick-up trucks, consists of a conventional front door and a rear auxiliary door latchingly secured together. The rear door is latched to the truck body and is overlapped by the front door in their closed positions requiring sequential opening.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: June 5, 1990
    Assignee: Ford Motor Company
    Inventor: Gary J. Grinn
  • Patent number: 4902054
    Abstract: A safety device for screen and storm secondary doors in which a movable rod is horizontally mounted on the door jamb proximate to the latch receiving mechanism. The closure of the inner or primary door urges the rod into position so as to disable the latching mechanism of the screen door. The opening of the primary door enables the rod to be withdrawn thereby permitting the secondary door to be opened.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: February 20, 1990
    Inventor: David A. Swanson
  • Patent number: 4829887
    Abstract: A laboratory fume hood with at least two vertically-movable sashes and with a control in the form of a multifunctional sash lock that may be selectively positioned to allow only one sash to be opened at a time, or to permit both sashes to be opened but only partially, or to allow both sashes to be opened fully.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: May 16, 1989
    Assignee: Hamilton Industries, Inc.
    Inventor: Stephen E. Holschbach
  • Patent number: 4767139
    Abstract: A latch assembly for recreational vehicle doors in which a closure door and a screen door are hinged about common axes includes a latch bolt which is adapted for mounting on a vertical stile of the screen door and is movable into engagement with a keeper plate. A latch bolt retainer is mounted on an inside surface of the prime closure door. The latch bolt retainer has portions which cooperate with the latch bolt on the screen door such that when the prime closure door is closed against the screen door, the retainer captures the latch bolt on the screen door and retracts it from the keeper and retains the latch bolt in a retracted position. The capturing movement is accompanied by alignment movement of the screen door latch bolt with respect to the retainer so that the screen door is held in a predetermined aligned position in the retainer.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: August 30, 1988
    Assignee: Philips Industries Inc.
    Inventor: Ronald J. Hansing
  • Patent number: 4688492
    Abstract: The internal space of a safe is subdivided into two compartments lying side by side by a vertical partition provided with a reinforced vertical upright. A reinforced closure door comprises two leaves adapted to be closed in succession, each having its own locking mechanism with bolts adapted to engage in said upright in their thrown position. The bolts of the two mechanisms are made functionally interdependent by means of pivotal latch members borne by the partition which lock in the thrown position the bolts of the second-to-close door leaf in response to the throwing of the bolts of the first-to-close door leaf.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: August 25, 1987
    Assignee: Lips Vago SpA
    Inventor: Ferruccio G. Peghetti
  • Patent number: 4678214
    Abstract: A surgical case cart having a closed container supported on a chassis. The closed container includes a pair of front door panels hinged to side door panels which in turn are hinged to side wall sections, so that the container can be completely opened with the front and portions of the sides being exposed by the door panels wrapping around the side and back. The door panels are formed of single pan construction so as to avoid cracks and crevices, and yet exhibit rigidity of a double pan door construction. The lower edges of the door panels provide a baffle effect to reduce the movement of contaminated air into the cart. The top of the cart contains an overhang lip to prevent liquids from spilling into the container. Stem mounted casters are utilized to avoid flat horizontal surfaces on which dirt can collect. The intersection between the back, sides and chassis is constructed to avoid the possibility of collecting contamination and bacteria.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: July 7, 1987
    Assignee: Metropolitan Wire Corporation
    Inventors: Robert J. Cohn, Frank C. Olsson, James W. Holzman, Paul Santarelli
  • Patent number: 4666106
    Abstract: A device for securing an opposing pair of outwardly opening cabin doors on general aviation aircraft and the like. A pair of non-extensible elongated elements, such as a pair of rods or a rod and a cable, are joined together at one end such that the elements can rotate independently of one another. The opposite ends of the elements are secured to the cabin doors, at least one of the elements being selectively engagable to its corresponding door from outside the aircraft. With the device in place, the cabin doors are clamped together and cannot be opened until at least one of the elements is disengaged from its corresponding door.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: May 19, 1987
    Inventor: J. Michael Kohout
  • Patent number: 4564230
    Abstract: Door-swing restraint apparatus for a pair of latched doors closing an end opening of a cargo box comprises a chain or cable link connected between margins of the doors so that a person actuating a bar to release door latches will not be injured by freight items which bear against the door. One end of the link is fixed in the marginal edge of one door, the other end being fixed to a lever arm which can be selectably engaged with or disengaged from a lateral bracket on the latch bar of the other door, only when the arm is rotated out of its horizontal transport position into the vertical. Rotation of the bar due to torque exerted by a freight item pressing against the door is limited by a stop pin carried by the bar engaged in a slot in a door-mounted journal. The opening swing of the door is limited to a few centimeters as the link becomes taut and the lever arm remains horizontal, visually signalling the hazard.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: January 14, 1986
    Inventor: Edward A. Haist
  • Patent number: 4524590
    Abstract: The door latch with lock includes a support bracket adapted to be mounted on the interior surface of an outer screen or storm door, an elongated bolt slideably and rotatably carried in a guideway on the support bracket, and a transversely extending handle on the bolt which extends through a slot in the guideway and is somewhat longer than the spacing between the outer door and an inner door. When the handle is in a generally horizontal sliding position, the bolt slides freely between a latched position wherein the outer end is received in a keeper on the door frame and an unlatched position wherein the bolt is retracted from the keeper. The bolt and handle can be rotated downwardly to a general vertical locking position when the bolt is in either the latched or unlatched positions, but lock means and actuating means prevent the sliding of the bolt between the latched and unlatched positions unless the handle is rotated to the sliding position.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: June 25, 1985
    Inventor: Joseph D. Budish
  • Patent number: 4470276
    Abstract: A lock for a pair of doors hung in a single door frame, usually an inner main door and an outer door which may be a storm door and usually includes glass or screen panels through which a caller may be observed and identified, the lock including a pair of bolts carried by the door frame and operable to be extended therefrom to engage sockets formed therefor respectively in the door edges to secure them against opening. The bolts are operated by a lock shaft carried in the door frame to unlock first the inner door, so that it may be opened to permit observation and identification of a caller, while the outer door remains locked, and then to unlock the outer door if desired, to permit ingress of the caller. The lock shaft may be operated from inside the doors by a manual lever, and from outside by a key mechanism.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: September 11, 1984
    Inventor: James D. Bayless
  • Patent number: 4395000
    Abstract: A latch and lock mechanism for an aircraft cargo door assembly is disclosed. The mechanism is adapted to a cargo door assembly of the type having an outwardly opening, nonplug-type cargo ramp and an inwardly opening, plug-type cargo door hinged to opposite sides of a doorway so as to form a two-part closure member in coplanar alignment with the airplane fuselage when the door assembly is closed. The latch and lock mechanism preferably includes a plurality of latch units that secure the cargo ramp in its closed position. The latch units are connected through a cam-actuated interlock mechanism to the plug-type cargo door. The interlock mechanism is such that the cargo ramp latches can only be actuated when the cargo door is in an open position, and further such that the cargo door cannot be closed unless the cargo ramp latches are in a latched position.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: July 26, 1983
    Assignee: The Boeing Company
    Inventors: James E. Deviny, Miloslav Puncoch
  • Patent number: 4385551
    Abstract: A laboratory fume hood with at least two vertically movable sashes that are operatively coupled together by a sash lock that prevents both of the sashes from being opened at the same time. Opening of one sash automatically flips a pivoted lock into locking engagement with the other sash. Thus, one of the sashes must be closed before the other can be opened. This prevents the excessive waste of heated or cooled room air being sucked out through the fume hood.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: May 31, 1983
    Assignee: Hamilton Industries, Inc.
    Inventor: Jon A. Zboralski
  • Patent number: 4383666
    Abstract: Pressure equalization between the upper and lower compartments of an aircraft is provided through normally covered openings along the edges of the floor of the upper compartment. The covers each are comprised of a double-flap arrangement in which one flap is constructed as two hinged panels with locking features in order to hold the other flap in a clinging position. The space between the flaps participates in the air-conditioning circulation. In the case of a pressure drop in the lower compartment, the pressure differential tends to fold the winged panels, thereby releasing the locks so that air pressure can be equalized through uncovering of the openings.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: May 17, 1983
    Assignee: Vereinigte Flugtechnische Werke GmbH
    Inventors: Volker Allerding, Heinz Borchers, Hermann Schellstede
  • Patent number: 4315647
    Abstract: A flush bolt is disclosed which is adapted for flush mounting on a door. The flush bolt is composed of a latch sled and faceplate. Both the latch sled and faceplate may be constructed by stamping sheet metal. The latch sled is slidably mounted on the faceplate by way of integral longitudinal channels which engage tracks which are an integral part of the faceplate. Both tracks and channels are formed during the stamping process. An actuator arm slidably operates the latch sled between engaged and disengaged positions. A biasing spring is provided for biasing the actuator arm to either the engaged or disengaged position. A forked tongue having a slot for guiding the biasing spring extends upwardly from the latch sled and is also formed during the stamping process. The slot which is formed during the stamping of the forked tongue is notched to provide securing of the housing spring.
    Type: Grant
    Filed: September 18, 1979
    Date of Patent: February 16, 1982
    Inventors: Herbert Wilzig, Charles J. Schuessler
  • Patent number: 4178024
    Abstract: A rod lock for doors or gates having two wings, comprising a locking rod or bar mounted at one wing for vertical displacement. The locking rod, in its closed position, engages into a recess or depression in a floor or the like. The other wing has at least one stop or impact member against which bears the wing having the locking rod. A door lock is effective between both of the wings. At least two guide rings are provided in which the locking rod is vertically displaceable and rotatable about its lengthwise axis. A locking or closure element mounted at the rod is pivotable together with the rod and intended to engage in its closed position between the mutually contacting door wings. A retarding or inhibiting element at the counter-wing prevents lifting of the locking element and thus the locking rod or bar.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: December 11, 1979
    Inventor: Remigius Wagner
  • Patent number: 4099753
    Abstract: A lock housing is adapted to be mounted at the free vertical edge of the inactive one of a pair of hinged doors that have adjacent vertical edges when both doors are closed. Slidably mounted in the housing is an axially movable shaft that extends vertically therefrom and has a normally retracted latch bolt mounted on its outer end. Operatively connected to the opposite end of the shaft is the inner end of a rocker arm, the central part of which is pivotally connected to the housing on a horizontal axis. A cam pivotally connected on a vertical axis to the housing normally projects from it for engagement by the free vertical edge of the active door for swinging the cam into the housing to swing the rocker arm vertically in order to project the latch bolt from a horizontal edge of the inactive door. The rocker arm is so mounted in the housing that it will be moved by the cam bodily away from the free edge of the door if the shaft cannot move, whereby the mechanism will not be damaged.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: July 11, 1978
    Assignee: McKinney Manufacturing Company
    Inventors: Joseph W. Gwozdz, James E. Biesecker, Charles R. Snyder
  • Patent number: 4058332
    Abstract: An improved astragal and flush bolt assembly to be secured to a relatively stationary member such as a door jamb or to the edge of an inactive door of a pair of double doors or the like. The astragal assembly includes a flat metal body mounted on the edge of the stationary member and a metal stop member secured to the body along one edge thereof. The flat body includes first and second spaced apart legs extending outwardly from the stationary member with the flat body and legs defining a channel to receive and retain a door latch bolt from the active door. The stop member prevents movement of the door in a first direction and when the latch bolt is engaged in the channel, the channel and latch bolt prevent the door from moving in the opposite direction.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: November 15, 1977
    Assignee: Acorn Building Components, Inc.
    Inventor: Joseph DiFazio
  • Patent number: 4005886
    Abstract: A flush bolt mechanism is disclosed for latching the inactive one of a pair of swinging doors, the mechanism functioning to latch the closed inactive door in response to closing of the other door. The latch mechanism includes a bolt that is driven home by cam and spring assemblies. A heat-responsive mechanism is provided for retaining the bolt in its extended position when the heat-responsive mechanism is subjected to a temperature and for a time sufficient to melt one of its components. A release mechanism may be provided for retracting the extended bolt in response to a force of preselected magnitude applied against the inside of the inactive door.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: February 1, 1977
    Assignee: Door Controls Incorporated
    Inventor: Douglas E. Lirette