Roofing nail pressure plate

Details Roofing nail pressure plate Roofing nail pressure plate

1991-07-29

1995-04-18

Lindsey, Rodney M.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Washer structure

Axially resilient

411369, 411542, F16B 4302

Patent

active

054073138

ABSTRACT:
A resilient molded pressure plate formed of polypropylene or the like is provided for a roofing nail in engagement with a sheet of roofing felt to increase the retention of the felt. The underside of the plate is concave in the undeflected form, and is provided with a central boss that limits the downward diaphragm deflection as a nail is driven through a central opening. The peripheral rim of the plate is serrated with concentric ridges disposed initially at progressively increasing distances from the plane of the outer ridge, proceeding radially inward. As the plate is deflected on driving of the nail through the central opening, these ridges come into coplanar relationship, providing the maximum intensity of engagement with the sheet of felt material.

REFERENCES:
patent: 4074501 (1978-02-01), Sandqvist
patent: 4361997 (1982-12-01), DeCaro
patent: 4715756 (1987-12-01), Danico et al.
patent: 4726164 (1988-02-01), Reinwall
patent: 4799845 (1989-01-01), Hrysko
patent: 5069589 (1991-12-01), Lemke

Affiliated with

Also associated with

Rating

Roofing nail pressure plate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Roofing nail pressure plate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roofing nail pressure plate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-63583