Joints and connections – Selectively assembled – e.g. – convertible – etc. – Selective orientation
Patent
1991-12-20
1992-12-29
Ciomo, Peter M.
Joints and connections
Selectively assembled, e.g., convertible, etc.
Selective orientation
4034081, 187 56, F16B 100, B66B 1300
Patent
active
051746751
ABSTRACT:
A guide bar for an elevator door includes a beam having a plurality of attachment apertures formed therein for the attachment of a guide, sliding or roller. The apertures are arranged in a staggered pattern providing for numerous adjustment possibilities for the guide to accommodate variations between the door and a guide track for the door. The guide is attached to a first horizontal web of the beam and extends into a groove mortised into the door sill, whereby the elevator door is guided at the lower end along a predetermined sliding track. Each aperture is formed from three overlapping circular recesses, the center points of which form an isosceles triangles such that bolt heads of fasteners are supported on at least two thirds of their circumference by the first web. The center points of the recesses of the apertures are staggered with respect to the center points of each of the other recesses in a direction transverse of the first web by a step width to provide a plurality of adjustment possibilities.
REFERENCES:
patent: 2733786 (1956-02-01), Drake
patent: 3028937 (1962-04-01), Grabowski et al.
patent: 3077960 (1963-02-01), Lang
patent: 3250051 (1966-05-01), Cheris
patent: 3523390 (1970-08-01), McAulay, Jr.
patent: 3986318 (1976-10-01), McConnell
patent: 4754857 (1988-07-01), Urban
patent: 4781270 (1988-11-01), Holland
Ciomo Peter M.
Clemens William J.
Inventio AG
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