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:
Feb. 05, 1980
Filed:
Jun. 22, 1978
Applicant:
Inventor:
Enzo Brusasco, Turin, IT;
Assignee:
Roltra S.p.A., Turin, IT;
Primary Examiner:
Int. Cl.
CPC ...
F16N / ;
U.S. Cl.
CPC ...
74459 ;
Abstract
A screw-nut screw transmission coupling in which a tubular outer innerly-grooved sleeve and an inner outerly-grooved elongate member are coupled to define a plurality of endless ducts for circulation of a plurality of ball bearings; each said endless duct being formed by two adjacent turns of a helical duct defined by said outer sleeve and said inner elongate member, and a return duct extending through a respective through bore provided through said sleeve and straddling said two adjacent turns, said return duct being defined by a cavity provided in a plate fixed to the outer surface of said sleeve and closing said through bore.