Abstract: An overhead door system including a frame, a door leaf and a first hydraulic cylinder. The door leaf is pivotally mounted to the frame. The first hydraulic cylinder has a first cylinder end and a second cylinder end. The first cylinder end is operably attached to the frame. The second cylinder end is operably attached to the door leaf. The first hydraulic cylinder is capable of moving the door leaf between a closed configuration and an open configuration. At least one of the frame and the upper door panel has a slot formed therein. When the door leaf is in the closed configuration, the first hydraulic cylinder is substantially recessed in the slot.

Abstract: A hinge apparatus for a trunk lid may include a hinge arm which has a first end rotatably coupled to a vehicle body, and a second end fixed to the trunk lid, and a spring which may be mounted to and supported by the vehicle body, connected with the hinge arm, and elastically deformed by rotation of the hinge arm when the trunk lid may be closed, in which a position or a rotation angle at a point at which the spring may be supported by the vehicle body may be adjusted so that an amount of elastic deformation of the spring may be increased when the trunk lid may be closed.

Abstract: A tilt-up door for a building having a relatively wide door opening having a door frame including top and bottom horizontal members and vertical side members connected to the top and bottom horizontal members. The vertical side members can have a horizontally extending pivot shaft tube positioned between the top and bottom horizontal members, and outwardly extending cam followers adjacent to the top horizontal member. U-shaped channels can extend vertically along opposite sides of the door opening with the U-shaped channels facing each other and the door opening. The U-shaped channels can have generally horizontal track members extending from the top edge of the door opening and the horizontal tracks can have a curved cam surface. Carriages each including a horizontal pivot shaft journal can be positioned in the U-shaped channels for vertical movement in the U-shaped channels.

Abstract: The present invention provides a balance assembly (10) for use with a sash window assembly (104) slidable within a master frame (110). The balance assembly (10) generally includes a plate (20), at least one coil (40), and a shoe or pivot brake assembly (60). The plate (20) is adapted to be attached to the master frame (110). The spring (40) has a coiled portion (42), an intermediate portion (43), and a free portion (44). The coiled portion (42) of the spring (40) is rotatably supported by a support member (30) extending from the plate (20). The free portion (44) of the spring (40) has a curved configuration with a curved end (46). The pivot brake assembly (60) has at least one slot (76) adapted to receive and retain the free portion (44) of the spring (40). The slot (76) defines a protrusion (83) that engages the free portion (44).

Abstract: An assembly includes panels forming a bin or cabinet, and a flipper door operably attached to the bin by a pair of opposing modules. Each module includes a body forming a groove forming a curvilinear track along its upper edge, and the door includes a follower operably engaging the track. Each module further includes a spring-biased lever pivoted to the body of the module at a mid-lever pivot. A first leg of the lever is pivoted to the door at a door pivot, and an oppositely extending second leg is connected to a spring-biased force-generating device. The arrangement is constructed to counterbalance a weight of the door in most intermediate positions.

Abstract: An over-the-top type cabinet door prop unit is characterized in that it comprises a fitting case to be rigidly fitted to the inner surface of one of the lateral walls of the cabinet, a movable spring holder vertically movable relative to the fitting case containing it and urged downward by compression springs, a link arm pivotably linked at the upper end to the movable spring holder by a pivot pin and a swing arm swingable around an arm spindle located in a lower portion of the fitting case and having a base section arranged around the arm spindle and linked to the lower end of said link arm by a link pin and an arm section extending from the base section and pivotably linked at the distal end thereof by an anchor pin to an anchor pin bearing secured to the over-the-top type cabinet door and that the pivot where the link arm and the base section of the swing arm is linked by the link pin is located closer to the cabinet door relative to the vertical axial line connecting the pivot pin and the arm spindle when

Abstract: A suspension mechanism for pivotally moving a door panel to close or open a doorway includes a first brace with one end attached to a point low on the panel and the opposite end to a stationary pivot and a second brace with one end attached to the first brace intermediate of its ends and the opposite end slidably and rotatably connected near the top of the panel for support thereof. A stationary but rotatable axial guide receives the second brace intermediate of its ends, and a torque generating spring assists with lifting and opening the panel with energy stored from the lowering of the panel. The spring may be a compression spring encircling the second brace with one end attached near the upper end of the second brace and the opposite end attached to the stationary axial guide, thus locating the spring near the top of the doorway.

Abstract: A cabinet is provided with a curved, upwardly-swinging door and interior shelves. The curved shelf door is mounted on a pair of opposed pivot arms which rotate on a horizontal axis. Each pivot arm is provided with a disk portion having a central boss and an arm portion tangent to the disk portion. The central boss engages a fixed stud at the side of the cabinet and provides a center pivot for each of the arms. A gas spring for each arm is provided, which is pivotably connected at one end to the arm and at the other end to a side wall of the cabinet. The gas spring serves a dual purpose of counterbalancing the door as it moves between an open and a closed position and opening the door unassisted once the user initiates movement of the door, this opening feature being very beneficial to seated and physically disabled users.

Abstract: A mechanism for opening and closing a large one piece rectangular overhead gate includes vertical jamb members on each side of the gate, horizontal track members located near the top of each side of the gate, track rollers fastened to the gate and carried on the track members, kicker wheel brackets attached to each jamb member each including a main pivot, an upper spring mounting member above the pivot, spring arm members fastened to said pivots and a kicker wheel mounted above the upper spring mounting member, a lower spring mounting member near the lower end of each jamb member, coil springs attached between upper and lower spring mounting members and an electric motor attached to the top of the gate to raise and lower the gate.

Abstract: First and second generally harp shaped guard halves, one being formed with a vertical mounting flange for attachment to the garage door jamb adjacent the hardware to be shrouded and each being formed with co-extensive planar walls projecting along the opposite sides of the hardware and formed with inturned peripheral flanges rounding the top and vertical length thereof for complementally mating together to generally shroud the hardware within such guard apparatus.

Abstract: A spring assembly for use in place of the spiral tension springs in conventional spring-loaded counterbalancing systems for garage doors. It is made up of a compression spring and traveling pulley in a tubular housing, the compression spring being mounted above the pulley. A cable extends around the pulley from an anchored end to interconnection with the kicker assembly of the mounting hardware for tension springs in an ordinary garage door counterbalancing system so that closing of the door causes the cable to pull up on the pulley and compress the spring. There is virtually no possibility that the compressed spring will rupture and emit flying fragments, but even if this occurred the housing would prevent the escape of such fragments to the surroundings.

Abstract: A spring balanced door for closing a passage through a door frame comprises a closure panel having opposite lateral edges and movable from a closed position to an open position, fixed supports connected to the door frame at opposite sides of the passage, a vertical guide track connected on opposite sides of the door frame and rollers rotatably mounted to the panel at each lateral edge thereof and adjacent a lower corner of each lateral edge, movable in each track respectively. Rigid arms are connected to the panel at intermediate locations of each lateral edge and extend perpendicularly to a plane of the panel from an interior surface of the panel. A lever arm is journaled between each rigid arm and each support, with each lever arm pivotally connected to each rigid arm at a joint. A spring is connected between at least one of the supports and a corresponding lever arm with a stop provided on the support against which the lever arm stops during movement of the panel from its closed to its opened position.

Abstract: A hinge mechanism for an overhead baggage compartment which is generally located in the passenger section of an airliner. The hinge mechanism comprises, a dual-cam guided four-bar linkage mechanism which produces a compound motion to the door for retraction through a relatively narrow horizontal opening into an area above the baggage compartment. Ordinarily, a four-bar linkage mechanism would have its operation designed around two fixed pivot points; however, in this disclosure there is only one fixed pivot point and the other of said pivots is a walking pivot which is guided by a dual-cam device for profiling the travel of the door.

Abstract: The armored door of a field artillery ammunition support vehicle has a door opener on each side of the door, the door being hinged at the top to the top of the vehicle for movement into raised substantially horizontal position to supply added protection for crew members. Each door opener includes a cylinder pivoted at its bottom to the floor of the vehicle with a rod actuated compression spring in the cylinder. The upper end of the rod is pivoted to the end of an arm and the arm is in turn pivoted to an extension from the door opening into the vehicle body. The other end of the arm is pivoted to a link which in turn is pivoted at its other end to the interior of the door. On opening of the door the spring which is compressed assists in raising the weight of the door and on closing of the door the spring compresses countering the downward action of the weight of the door. In door close position the four pivots are aligned on the axis of the cylinder and rod to assist in holding the door in closed position.