Brushing – scrubbing – and general cleaning
Patent
1978-04-14
1979-12-25
Bonck, Rodney H.
Brushing, scrubbing, and general cleaning
85 83, 151 4175, F16B 1306
Patent
active
041799771
ABSTRACT:
A one-piece plastic fastener that is insertable in a non-circular, e.g., square, panel aperture and that accommodates a screw for securing another article to the panel. The fastener includes a relatively flat head portion defining a central opening, a hollow, open-ended, inwardly flexible shank portion extending from a major surface of the head portion and cross-sectionally matching the shape and size of the panel aperture, and a closed-end barrel portion extending from the major surface of the head portion within the interior hollow space of the shank portion and defining an internal screw receiving and encapsulating bore aligned with the opening in the head portion. Longitudinal protuberances are formed on the external surface of the shank portion that cause the shank portion to flex inwardly as the fastener is pushed into the aperture. The aperture defining edges of the panel engage against tapers in the protuberances near the head portion and, because of the outward resiliency of the shank portion, reaction forces are generated which firmly press the head portion against the panel surface. The fastener thus seals and firmly retains itself in the aperture even prior to the time that a screw is tightened therein. During screw tightening, the barrel portion is adapted to twist within the shank portion and to cause further outward bulging of the shank portion walls. This outward bulging provides even greater resistance to removal of the fastener from the aperture. The fastener is particularly adapted for use in the manufacture of refrigerator and freezer cabinets.
REFERENCES:
patent: 2788047 (1957-04-01), Rapata
patent: 3404596 (1968-10-01), Ryder
patent: 3469493 (1969-09-01), Fisher
patent: 3593612 (1971-07-01), Schulze
patent: 3703120 (1972-11-01), van Buren
patent: 3803973 (1974-04-01), Rapata
patent: 3830134 (1974-08-01), Erickson
patent: 3869958 (1975-03-01), Murayama
patent: 4082030 (1978-04-01), Erickson
patent: 4085652 (1978-04-01), Vanotti
Bonck Rodney H.
O'Connor James R.
O'Donnell Martin J.
O'Konski Thomas C.
TRW Inc.
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