Abstract:
A multi-strand chain forms a chain drive including at least two chains so that the chain drive may communicate a force when the chain is pushed or pulled. The chains may be separated or disengage so as to be stored compactly. The chains may be engaged to form the chain drive so that the chain drive is substantially rigid and in a linear orientation, and pivotally connected chain links may not substantially rotate relative to each other and may not be deflected substantially from the linear orientation. The chains may be engaged and disengaged by rotating around sprockets which deliver the force to the chain drive. The chain drive may be utilized as a garage door system for raising or moving laterally a garage door or movable barrier with the chain drive in compression.
Abstract:
A garage door opener is provided with a drive mechanism formed by a chain that runs in a track. The track is mounted on the platform of a mounting support that is hinged to the vehicle entry wall of a garage directly above the garage door opening. The track includes a track opening directed straight out from the vehicle entry wall. The track extends in a curve from the track opening toward the vehicle entry wall, along a first proximal straight section that lies parallel to the vehicle entry wall, around a one hundred eight degree bend, and along another distal straight section that is located parallel to and spaced from the first, proximal section. The chain is formed with large links having flat upper and lower plates. Each link has a hinged side and an unhinged side and the links are joined together at their corners along their hinged sides. The chain can only be bent in an arc that is concave inwardly toward the hinged sides of the links. A reversible drive mechanism drives the chain so that as the garage door is opened, the chain links emanate in straight linear alignment with each other from the track opening and function as a push rod that forces the top of the garage door inwardly toward the interior of the garage. When the garage door is closed, the links of the chain will flex about their corner connections and thereby follow the chain track on the platform. As the garage door approaches a closed position, a lift mechanism is actuated that rotates the platform upwardly through a small arc to allow the top of the garage door to pass therebeneath.
Abstract:
A push-pull chain garage door operator system includes a drive module and an elongated guide rail for a push-pull chain connected to a carriage assembly mounted on the guide rail. The chain is engaged with a sprocket mounted on a generally rectangular plate-like molded plastic support member which includes a serpentine idle chain storage slot formed therein. The support member is releasably connected to a stamped metal frame plate for covering the storage slot and supporting the drive module. The bottomwall of the support member supports a right angle speed reduction drive unit connected to a drive motor retained in a cradle formed by an integral boss on the support member. The motor and a starting capacitor therefor are retained in respective cradle portions of the boss by a removable retaining strap. A control circuit board is mounted on the underside of the support member and a two-part shroud for the operator mechanism is releasably secured to the frame plate.
Abstract:
An operator for opening and closing pivotal windows comprises at least two pull and pressure transferring, flexible linkage mechanisms (3,4) connected at one end to a fixture (5,6) on a frame member and at the opposite end in engagement with a driving device (12-17) mounted on the opposite main frame member (2). The driving device is common to the linkage mechanisms and is together with the parts of the linkage mechanisms engaging it mounted in a common housing (7) for receiving the entire length of the linkage mechanisms (3,4) and provided with guides (8,9) and lead-in openings (8a,9a) for the linkage mechanisms (3,4). A carrier element (10,11) in connection with the guides is via transmission elements (12-16) in the housing 87,28; 54) connected with a common driving unit (17).
Abstract:
A linear actuator has a drum, a stiff flexible ribbon wound on the drum, a device for rotating the drum at least to partially unwind the ribbon thereon, a guide funnel for gradually forming the ribbon into a tubular configuration as it comes off the drum, and an attachment device at a free end of the ribbon for connection to an object to be moved in a linear path. The actuator converts rotary motion to linear motion without the need for complex mechanical linkages.
Abstract:
A power window assembly in a vehicle includes a slidable window pane mounted to the vehicle for movement in a first lateral direction to an open position and in a second lateral direction to a closed position. The power window assembly further includes first and second mounting brackets securely attached to the window pane and each having a pocket therein. The power window assembly also includes a power drive mechanism for selectively moving the window pane between the closed position and the open position. The power drive mechanism includes first and second connector arms each laterally coupled to the first and second mounting brackets, respectively. The connector arms each have an upper portion seated in the pockets of the respective mounting brackets by slip-fitted insertion therein and are vertically slidable relative the pockets to adjustably connect the window pane to the power drive mechanism. Thus, the connector arms of the power drive mechanism vertically float relative the window pane during movement of the window pane between the open position and the closed position.
Abstract:
A device (16b) for tilting windows, doors, ventilation hatches, or similar closures open, with a motorized transmission-activating mechanism (12b) and a transmission (14b) comprising two back-to-back chains that curve in opposite directions.
Abstract:
A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.
Abstract:
A slidable pane power window assembly for mounting in the rear window of truck cabs is disclosed. The assembly comprises a frame dimensioned to fit in the rear window opening of a truck cab and fitted with one or more fixed and slidable window panes. A slidable pane is moved horizontally into an opened and closed position by a rack and pinion drive, wherein a rack affixed to the slidable pane is engaged by a pinion powered by a motor connected to the pinion via power transmission cable. Another embodiment uses a push-pull mechanism for operating the window.
Abstract:
The present invention discloses an improved chain assembly and a method for making the same. In general, the method of making a chain assembly in accordance with the present invention, comprises forming a plurality of links having a preselected shape and placement of apertures therein. A plurality of wire blanks are formed having an outer diameter to permit insertion into the apertures of the links. Such link is retained in a fixed position and a wire blank is inserted into each aperture of the link. On one end of each wire blank, a head is formed having a diameter larger than the aperture into which the wire blank is inserted. A mating link is placed into engagement with each link containing wire blanks with the end of each blank inserted in one aperture of the mating link in a manner to form a chain assembly. On the other end of each wire blank, a head is formed to complete interlocking of the links and blanks in forming the chain assembly.