Chairs and seats – Chair hardware or attachment
Patent
1997-09-22
1999-11-30
Nelson, Jr., Milton
Chairs and seats
Chair hardware or attachment
297410, 403375, 403 3, A47C 1500
Patent
active
059929391
ABSTRACT:
A head rest sleeve for receiving a head rest support rod having a diameter within a known tolerance range is formed of a resilient material and has a body having an axial bore. Integral with the inside of the body and disposed thereabout are at least two pairs of compressible crush ribs which protrude radially and extend the length of the body. The distance of protrusion of the ribs corresponds to the minimum possible diameter of the support rod. Located between each pair of ribs and integral therewith is a web which protrudes radially a distance corresponding to the maximum possible diameter of the support rod. When the support rod is inserted into the sleeve, the rod frictionally engages the crush ribs uniformly along its length and, when the diameter of the support rod is greater than the minimum possible diameter, compresses the ribs a uniform distance to allow the support rod to be moved in the sleeve. When the support rod has a maximum diameter, the ribs are compressed such that the support rod frictionally engages the webs as well as the ribs. In this manner a tight friction fit between the sleeve and the support rod is guaranteed regardless of the actual diameter of the support rod.
REFERENCES:
patent: 3096960 (1963-07-01), Kinney
patent: 3664617 (1972-05-01), Fenwick
patent: 5445434 (1995-08-01), Kohut
patent: 5667276 (1997-09-01), Connelly et al.
patent: 5738413 (1998-04-01), De Filippo
patent: 5788250 (1998-08-01), Masters et al.
Gass Paul E.
Taylor Philip A.
Illinois Tool Works Inc.
Jr. Milton Nelson
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