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:
Jul. 14, 1992
Filed:
Nov. 13, 1990
Hitachi Koki Company Limited, Tokyo, JP;
Abstract
A quick-return motion mechanism for use in an automatic magnetic drilling machine including a feed motor for generating power transferred through a worm wheel and a high-ratio reduction gear to a handle shaft to drive an electric drill. A one-way clutch is provided inside the worm wheel so that the handle shaft races on feed and is locked on return. The high-ration reduction gear is composed of elements which are arranged to cause the input and output sides of the high-ratio reduction gear to rotate in the same direction. The quick-return motion mechanism consists of an arrangement for restraining the input side element of the high-ratio reduction gear on feed and for releasing it on return to race the high-ratio reduction gear.