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:
Feb. 06, 1990
Filed:
Dec. 13, 1988
Gareth D Summa, Riverside, MO (US);
Mid-West Conveyor Co., Inc., Kansas City, MO (US);
Abstract
A positive retraction trolley stop mechanism is provided for a power and free conveyor system having a trolley member driven along a track. A depending trolley dog, engaged by drive dogs on a drive mechanism to push the trolley along the track, is movable between upper and lower positions for disengagement and engagement with drive dogs. The stop mechanism includes a pivotal stop arm which is pivoted to an upper position to engage a trolley dog on a trolley to be stopped and supported there by a cam member which is pivoted by a piston and cylinder. The cam member is pivoted out from under the stop arm to release the stop arm to assume its lower non-braking position. A one way or lost motion link is connected between cranks on a cam shaft and a stop arm axle to positively pull the stop arm to its non-braking position. The lost motion link is connected to the cam crank by a link connector which slidably engages a slot in the ink.