Fastener assembly with axially captivated washer
AssigneeCrest Products Inc.
InventorRudolph Schmidt, Jr.
Life of this patent
Estimating the term…
Abstract
A preassembled fastener assembly having a washer axially captivated on a threaded screw. The washer includes an elongated cylindrical sleeve, a radially outwardly directed flange and at least two inwardly extending detents within the sleeve to yieldably engage a shoulder on the threaded screw to hold the parts together. The detents are provided with elongated flattened inwardly extending surfaces. When assembled, the screw tip extends substantially outward of the washer sleeve and beyond the grommet. Methods of forming the detents are disclosed.
Claims21
A fastener assembly adapted to be preassembled, comprising:
- an elongated screw having a shank portion, said shank portion including a driving head at one end and an entering tip at an opposite end thereof, said shank portion further including an unthreaded portion of predetermined axial length and diameter extending below said driving head, a threaded portion of predetermined axial length and diameter extending between said tip and said unthreaded portion, and a radially outwardly extending shoulder disposed intermediate said threaded and unthreaded portions, said shoulder having a diameter greater than the diameters of said threaded and unthreaded portions;
- and
- a washer having an elongated cylindrical sleeve of predetermined length along an axis and an inner diameter, said sleeve having two ends, a first radially outwardly directed flange of predetermined outer diameter extending outwardly from one end of said sleeve, and at least two inwardly extending detents disposed within said sleeve proximate and below said one end, said detents having inwardly facing surfaces elongated and flattened in the direction of extension of said axis, defining a detent diameter less than said inner diameter, said threaded and unthreaded portions of said screw each having a diameter less than said detent diameter, and said shoulder having a diameter greater than said detent diameter and less than said inner diameter, whereby said detents yieldably engage said shoulder when said screw is forcibly inserted into said washer such that said washer is axially captivated by said screw along said shank portion between said driving head and said shoulder.
A washer for a fastener assembly, the washer comprising:
- an elongated sleeve having inner and outer surfaces and two ends;
- a flange extending radially outward from one end of the sleeve in a flange plane;
- and
- at least two detents formed in an inner surface of said sleeve and extending inwardly of said surface at a position in said surface axially displaced from said flange plane,
- said detents projecting inwardly from said inner surface and said detents comprising sleeve material displaced from portions of said inner surface between said flange plane and said detents.
A washer for a fastener assembly, said washer comprising:
- an elongated sleeve,
- a flange extending radially in a flange plane from one end of said sleeve,
- said sleeve having an inner surface extending longitudinally in said sleeve,
- projections extending inwardly from said inner surface and spaced from said flange plane,
- said projections formed from material displaced from said inner surface between said flange plane and said projections.
In a fastener assembly, a washer comprising:
- an elongated sleeve having an inner surface extending between two sleeve ends,
- a flange extending radially from one of said ends;
- at least two detents extending inwardly in said sleeve from said inner surface,
- said detents having a first transverse edge and a second transverse edge defining an extended substantially flat surface therebetween,
- said detents formed from material of said sleeve displaced from the inner surface thereof.
A washer sleeve for a fastener assembly, said sleeve comprising:
- an elongated axially extending sleeve;
- a flange extending radially from at least one end of said sleeve;
- at least two detents formed in said sleeve and extending inwardly into said sleeve from said inner surface;
- said detents comprised in part of sleeve material upset axially from an inner surface of said sleeve between said flange and said detent.
Dependencies are inferred from the claim text.