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. 08, 1980
Filed:
Nov. 13, 1978
Joel C Cunard, Bedford, PA (US);
Hedstrom Co., Bedford, PA (US);
Abstract
A child's electric swing includes a pre-wound wind-up mechanical escapement type motor having spring-biased retainer and driving pawls, the latter being connected to a pivotally mounted hanger supporting the swing seat. The pawls engage a mainspring-driven ratchet wheel which periodically impulses the driving pawl to maintain the seat in oscillation. The mainspring is rewound periodically by rotating the ratchet wheel in the opposite direction by a battery-operated motor through a gravity-operated one-way clutch after the ratchet wheel rotates only about 180.degree. so that the prewound spring is always under tension. Also the pawls are moved out of engagement with the wheel during such rewinding to eliminate noise and drag on the wheel.