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. 05, 1984
Filed:
Sep. 30, 1982
David Saint, Elverson, PA (US);
Graco Metal Products, Inc., Elverson, PA (US);
Abstract
A battery-operated child's swing is driven by a motor with a worm mounted on the motor shaft. The worm drives a gear, on which is mounted a crank. The end of the crank is constrained in one sleeve of a two-way slider. A second sleeve of the slider, which is mounted at right angles to the first sleeve, receives one end of an over-travel torque spring. When the motor is energized, the worm turns the gear which drives the crank. The crank, via the slider, puts side pressure on the over-travel torque spring, directed first toward the front of the swing and then toward the rear of the swing. The force is applied above the horizontal pivot line of the swing carriage and causes a rocking motion in the carriage. The over-travel torque spring is stiff enough to transmit the driving force from the crank to the swing carriage while being resilient enough to twist, if necessary, due to stoppage of the motor to prevent damage to the mechanism in the event that the motor is stopped while the carriage is still swinging.