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:
Dec. 08, 1987
Filed:
Aug. 20, 1985
Makoto Ando, Osaka, JP;
Yukio Miki, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A drive coupling device for transmitting a rotational drive force from an optical instrument such as a camera body to another optical instrument such as an exchangeable lens has a construction which couples driving and driven coupling members steadily while centerizing the center axes of the driving and driven coupling members for efficient drive force transmission. A flat male engaging portion having a top surface and parallel side walls is formed on the driving coupling member while a slotted female engaging portion having a concave bottom wall and parallel side walls is formed on the driven coupling member. With the optical instruments connected to each other, the male engaging portion is brought into engagement with the female engaging portion under a force of a spring.