Plastic monorail conveyor trolley
AssigneeFormall Syn-Trac Systems, Inc.
InventorsDavid J. Forshee, James S. Salloum
Life of this patent
Estimating the term…
Abstract
A plastic conveyor trolley for an inverted T-bar monorail conveyor track is provided. The conveyor trolley comprises a pair of upper track-supported wheels and pairs of lower wheels engageable with and rotatable at times upon the underside surfaces of the track, the upper wheels being rotatably mounted on stub axles secured to the upper portions of the trolley arms, the lower wheels being rotatably mounted on bearing portions integrally formed in intermediate portions of the trolley arms, and a pendant member secured to and between the lower portions of the trolley arms. The lower wheels lie in a plane below and substantially parallel with the plane of the upper wheels.
Claims17
In a trolley assembly for operation on an inverted T-bar monorail rack comprising longitudinally abutting sections having a longitudinally extending upstanding stem and a laterally outwardly extending flange from each side of said stem, said flanges lying substantially in a plane transversely of said stem, the upper surfaces of said flanges being inclined slightly downwardly from said stem, each said track section having a substantially medial longitudinally extending web portion between said flanges therebelow, each said flange having an upwardly laterally outwardly curved underside surface portion adjacent and at each side of said web portion, blending into a substantially planar underside surface portion extending laterally outwardly to the distal edge of said flange, said trolley assembly comprising
- a pair of complementary, opposedly facing, plastic easily detachably conjoined trolley arms having an upper portion, an intermediate portion and a lower end portion,
- a plastic trolley upper wheel freely rotatable on each said trolley arm and in rolling bearing contact upon said flange upper surfaces,
- a plastic stub axle for each said trolley upper wheel easily removably attached to and adjacent the inward face of the upper portion of each said trolley arm,
- a pair of plastic trolley lower wheels easily removably and rotatably mounted on each said trolley arm in parallel spaced apart relationship,
- abutting bearing portions for each said pair of lower wheels projecting inwardly from the intermediate portion of each said trolley arm,
- means detachably connecting said trolley arms together at said abutting bearing portions,
- said bearing portions for each said pair of trolley lower wheels being aligned axially and in abutting inner end-to-end relationship,
- means intermediate the ends of said bearing portions limiting laterally outward travel of said trolley wheels,
- said upwardly laterally outwardly curved underside surface portions of said flanges limiting laterally inward travel of said lower wheels,
- said two pairs of lower wheels rotatable in a common plane below and substantially parallel with the plane of said upper wheels,
- said lower wheels being shaped to cooperatively function with said track underside surface portions,
- and a pendant member removably secured to the conjoined lower end portions of said trolley arms.
Dependencies are inferred from the claim text.