Strain relief connectors for flexible cord and cable

Claim 1

A strain relief connector for securing a cord to an electrical fixture comprising: a. an annular plastic body member including: a means for securing said body member to the electrical fixture, a first set of screwthreads formed on a portion of said body member, a protrusion extending from the inner surface of said body member for the entire circumference thereof, and a deflection ramp formed on said protrusion; b. a plastic cap member including a second set of screwthreads engageable with said first set of screwthreads of said body member to fasten said body member to said cap member and thereby to form a chamber, said cap member having a through aperture coaxially disposed with said body member when said first set of screwthreads engages said second set of screwthreads; c. a diaphragm made of flexible plastic material including a dished portion having an aperture adapted to receive a cord, said diaphragm including a flange provided with a locking means; d. a plastic collet having a bore adapted to receive a cord and including a plurality of tines and a second locking means for engaging said locking means of said diaphragm such that a unitary collet and diaphragm assembly is formed; said unitary collet and diaphragm assembly arranged within said chamber, said tines being deformed by said deflection ramp as said cap member is tightly screwed into engagement with said body member such that a cord will be gripped by said tines.