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:
Jun. 08, 1999
Filed:
Mar. 12, 1997
Scott Jones, Port Washington, NY (US);
Stefan Knupfer, Hamburg, DE;
Steinway, Inc., Waltham, MA (US);
Abstract
A knuckle assembly for an escapement action of a piano includes a knuckle, a jack retainer, and an adjustment means acting between the retainer and the knuckle for positioning the retainer relative to the knuckle. The knuckle assembly is mountable between first and second ends of a hammershank. The knuckle defines a knuckle surface for engagement with a jack. The knuckle is arranged for escape of the jack from engagement with the knuckle surface during depression of a piano key. The retainer retains the jack in an 'at rest' position with the jack in engagement with the knuckle surface in opposition to force of a spring urging the jack toward the 'at rest' position. A piano escapement action assembly includes a hammershank, a knuckle assembly, a jack engaged with a knuckle surface in an 'at rest', and a spring disposed to urge the jack toward the 'at rest' position.