The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1987
Filed:
Mar. 10, 1986
Robert Mathys, Bettlach, CH;
Robert Mathys Co., Bettlach, CH;
Abstract
An artificial hip joint socket made of plastic is intended to be installed in the pelvic bone without bone cement. The hip joint socket comprises a ribbed outer surface which permits good engagement of the bone tissue as well as two anchor plugs protruding from the outer surface which are intended to be inserted into corresponding bores in the bone. The angle which the plugs form with the socket surface deviate from the angle which the bores form with the socket surface by about 5.degree. in order to effect a predetermined prestressing action which restrains the hip joint socket in position. Furthermore, the hip joint socket comprises at least two barb-like anchor flaps on its outer surface which either lie opposite one another or mutually include an angle of between 120.degree. and 150.degree.. A good seating of the hip joint socket in the bone is ensured by these flaps even immediately after insertion of the hip joint socket. Thus, even if the anchor plugs offer insufficient retention for any reason, the employment of screws or dowels can be completely or partially foregone.