Grommet for setting in sheet material

• US 4,397,061 A
• Filed: 02/10/1981
• Issued: 08/09/1983
• Est. Priority Date: 02/29/1980
• Status: Expired due to Fees

• Current Assignee: Yoshida Kogyo K.K.
• Original Assignee: Yoshida Kogyo K.K.
• Inventors: Kanzaka, Yoshihiro
• Primary Examiner(s): SILVERBERG, FRED A
• Application Number:
  US06/233,165
• Time in Patent Office: 910 Days
• Field of Search: 16/2, 24/141, 24/142, 174/65 G, 174/152 G, 174/153 G
• US Class Current: 16/2.1
• CPC Class Codes: A44B 13/007 made of plastics
• CPC Class Codes: A44B 13/0088 by separable snap connection
• CPC Class Codes: F16B 21/16 with grooves or notches in the pin or shaft
• CPC Class Codes: Y10T 24/45906 having component of means permanently deformed during mounting operation

Abstract

A grommet includes an eyelet and a washer both of rigid plastics which are matable together so as to be set in a fabric or sheet material. The eyelet has a barrel having on one end thereof an annular locking flange projecting radially outwardly and an annular recess 16 adjacent to the locking flange 14. The washer has an annular rib and a plurality of locking tongues projecting radially inwardly from the annular rib. When the eyelet and the washer are coaxially combined with each other with the fabric or sheet material sandwiched therebetween, the locking tongues are snapped over the locking flange into the annular recess. The washer is now retained or trapped on the barrel by the locking flange against removal.

Claims

1. A grommet for setting in sheet material, comprising:

(a) an eyelet of rigid plastic material including a barrel having an annular retaining flange at one end of the barrel, an annular locking flange disposed at an opposite end of the barrel, an annular recess adjacent said locking flange, and a barrel portion between said annular recess and said retaining flange, said annular locking flange having an outside diameter which is the same as or smaller than that of said barrel portion; and

(b) a washer of rigid plastic material including an annular rib and a plurality of locking tongues projecting radially inwardly from said annular rib, said locking tongues of said washer jointly defining an interrupted circular edge having a diameter smaller than said outside diameter of said locking flange, said locking tongues being snappable over said locking flange into said annular recess at a position between the sheet material and said locking flange to retain said eyelet in said sheet material said locking tongues having slots therein.

2. A grommet according to claim 1, said annular recess opening radially outwardly and defined by a radial surface of said annular locking flange, a slant axially spaced from said radial surface in confronting relation, and an axial peripheral bottom surface extending between said radial surface and said slant.

3. A grommet according to claim 1, said annular rib having a plurality of protuberances projecting in an axial direction.

4. A grommet according to claim 3, at least one of said protuberances having ridges extending radially of said washer.

5. A grommet according to claim 1, said annular rib having a pointed projection extending in an axial direction.

6. A grommet according to claim 1, said tongues being angularly spaced from each other with radial grooves defined therebetween.

7. A grommet according to claim 1, said slots being arcuate and extending along said annular rib.

8. A grommet according to claim 1, said annular locking flange having an annular tapered surface with which said locking flanges are engageable before said locking tongues are snapped into said recess.