Abstract:
A hinged screw section for a worm drive garage door operator which allows the worm shaft to be assembled at the factory and folded back upon itself so that it can be shipped in a smaller and shorter package. Two different joints have been developed, one of a "I" type in which the connecting link between the two sections of worm shaft is merely a flat metal section with a hole in each end which fits into a slot in the ends of the two worm shaft sections and the assembly is pinned together with two rivets or bolts and the spacing between the two threaded shafts is such that a rack driven carrier will mate with threads of each portion. A second configuration utilizes an "H" joint and the link contains slots and flat tangs are formed on the ends of the two threaded shafts and joined with rivets to the link.
Abstract:
A structural-reinforcement means for a precision, telescoping, bearing, slide mechanism having inner and outer slide members held together by ball bearings, or other well known means, such as frictional or roller bearings, the balls being operably disposed in a ball retainer between the inner and outer slide members, the outer slide member being adapted to be received and supported in an outer, elongated, structural-reinforcing bar member having a longitudinally-extending, center wall and laterally outwardly-extending, flange members integrally formed along each side of the center wall. An inner, elongated, structural bar member is arranged to be received and fixedly mounted within the inner slide member thereof, wherein each reinforcing bar member is formed from an aluminum material whereby structural strength, load-carrying capacity, and extended load-carrying capacity are established with respect to the outer and the inner slide members.
Abstract:
Two parallel rails for the guidance of rollers or sliders on opposite edges of a panel, door or similar structural component comprise each a pair of elongated, substantially parallel members nestedly interfitted with a longitudinal internal clearance left therebetween to allow a change of their transverse separation and/or a limited relative tilting thereof. For this purpose the two members are joined to each other, at longitudinally spaced locations, by a plurality of adjustable connectors each comprising a male threaded element or bolt and a female threaded element or nut, each of these elements being anchored to a respective member. One member serves as a base, to be fixedly secured to a support, and the connector elements anchored thereto are nonrotatably held therein; the other member, forming a track, has a guide channel with an apertured bottom giving access to slotted or otherwise indented faces of the coacting connector elements to enable their rotation by a suitable tool such as a screwdriver.
Abstract:
An assembly for hermetically sealing an opening in a wall comprises a sliding door having sealing means along its bottom edge and along the top and lateral edges of its face adjacent the wall, and suspension rollers which slidably mount the door on a rail fastened to the wall and which are movable along the rail. The rail comprises fixed sections between adjacent ones of which are two sections which are movable between a first position in which the movable sections are aligned with the fixed rail sections and the door is disposed in a raised, clear position which permits it to move along the rail without obstruction, and a second position in which the movable sections are displaced downwards and towards the wall with respect to the fixed rail sections and the door is applied against the wall so that the opening is hermetically sealed. The rollers are arranged to engage the two movable sections respectively when the door is opposite the opening whereby the sections are moved to the said second position.
Abstract:
An improved roller for supporting an overhead sliding door to a track, the roller comprising a diamond configurated roller element movable along a transversely configurated diamond track, the roller being mounted on a roller bearing at one end of a shaft fitted into a bracket plate and urged into longitudinal or axial adjustment by means of a back up compression spring.