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. 23, 2011
Filed:
Nov. 17, 2006
Erik Roland Rahm, Upplands Väsby, SE;
Erik Roland Rahm, Upplands Väsby, SE;
Atlas Copco Tools AB, Nacka, SE;
Abstract
A torque responsive release clutch intended for a power nutrunner and comprises a driving clutch half () and a driven clutch half () coupled to each other for torque transfer by means of axially directed teeth (), wherein one of the clutch halves is axially movable between an engagement position and a release position against the action of a bias spring (). Each one of the teeth () of one of the clutch halves () has a substantially prismatic shape and extends axially from a base portion () to a top portion () and comprises two surfaces () which form between them a ridge (). The base portion () of the tooth () has a radial extent from an inner diameter (dto an outer diameter (d), and the ridge () extends from the inner diameter (dat the base portion () to the outer diameter (d) at the top portion (). The contact points between teeth () of the driving clutch half () and the teeth () of the driven clutch half () are arranged to travel along the ridge () during the release sequence of the clutch, whereby the torque coupling of the clutch is transferred via a smaller diameter at the beginning of the release sequence than at the end thereof. This means that the dynamic torque additive emanating from the inertia of the movable clutch half at the beginning of the release movement is added to a torque level that is lower than that at the end of the release sequence.