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US 4,054,131 AGranted
Intrauterine contraceptive device
AssigneeInternational Pregnancy Advisory Services
InventorElton Kessel
Life of this patent
Estimating the term…
Abstract
An integral intrauterine contraceptive device comprises a relatively thick elongated stem, a downwardly bowed crossbar secured to the top of the stem, and a pair of downwardly and inwardly extending arms formed as continuations of the crossbar. The crossbar and arm construction is designed for atraumatic embedding in the endometrium to reduce expulsion caused by uterine contractions.
Claims14
An intrauterine contraceptive device comprising:
- a. an elongated stem having an upper portion and a lower portion;
- b. a resilient downwardly bowed crossbar integrally secured at its midpoint to the tip of said stem upper portion;
- and
- c. a pair of resilient arms formed as integral continuations of the opposed ends of said crossbar, said arms being angled downwardly and inwardly toward said stem and terminating short of touching said stem, and the line of each of said arms defining an included angle with the central axis of said stem of between 40.degree. and 70.degree..
1 more element
An intrauterine contraceptive device adapted to lie in the fold between the anterior and posterior walls of the endometrium comprising:
- a. an elongated stem having a lower portion and an upper portion, said upper portion having a thickness between 4.0 to 6.0mm in a direction perpendicular to the anterior and posterior walls of the endometrium with said device installed therebetween and said lower portion having an outside diameter adapted for being slidably received by an inserter tube;
- b. a resilient downwardly bowed crossbar integrally secured at its midpoint to the tip of said stem upper portion;
- and
- c. a pair of resilient arms formed as integral continuations of the opposed ends of said crossbar, said arms being angled downwardly and inwardly toward said stem and terminating short of touching said stem, and the line of each of said arms defining an included angle with the central axis of said stem of between 40.degree. and 70.degree., said arms having flat fin-like portions at the ends thereof oriented to reduce tissue penetration during use thereof, and said arms being angled in opposite directions out of the central plane through the stem and crossbar.
1 more element
Dependencies are inferred from the claim text.