US4228738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor trolley construction
Assignee: DETROIT BANK & TRUST COMPANY A MICHIGAN BANKING Corp
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Filing: 1978-09-22
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Granted: 1980-10-21
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Expires: 1998-09-22
Abstract
Abstract A conveyor trolley structure made of a plastic super tough nylon material comprises a pair of arms each supporting a wheel for rotation and bearing upon the flanges of an I-beam monorail. A pendant member is secured to and between the lower ends of the arms. Metal screws are used to hold the depending member to the arms and to secure stub axles for the trolley wheels to their arms.
Inventors
- 👤 David J. Forshee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:58
CPC Classifications
B; B61; B61B; B61B12/00; B61B12/02; B65; B65G; B65G17/00; B65G17/20; B65G2201/00; B65G2201/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
156 words
In a trolley assembly for operation in an I-beam monorail conveyor system, the combination comprising a pair of spaced apart unitary integrally formed molded plastic trolley arms, each trolley arm having an upper portion, a lower portion and an intermediate web portion, a pair of unitary integrally formed molded plastic stub axles, each stub axle being easily removably attached to one said trolley arm, upon and adjacent the inward face of said upper portion, a pair of unitary integrally formed molded plastic trolley wheels, each wheel being removably supported for rotation on and retained by said stub axle on the inward side of said trolley arm upper portion, removable fastening means extending through said upper portion from its outer side and into said stub axle fixedly securing said stub axle against rotation to said upper portion inward face, and a parts carrying pendant member removably secured to and between the lower portions of said trolley arms.
Claim 2
Dependent Claim
156 words
In a trolley assembly for operation in an I-beam monorail conveyor system, the combination comprising a pair of spaced apart unitary integrally formed molded plastic trolley arms, each trolley arm having an upper portion, a lower portion and an intermediate web portion, a pair of unitary integrally formed molded plastic stub axles, each stub axle being easily removably attached to one said trolley arm, upon and adjacent the inward face of said upper portion, a pair of unitary integrally formed molded plastic trolley wheels, each wheel being removably supported for rotation on and retained by said stub axle on the inward side of said trolley arm upper portion, removable fastening means extending through said upper portion from its outer side and into said stub axle fixedly securing said stub axle against rotation to said upper portion inward face, and a parts carrying pendant member removably secured to and between the lower portions of said trolley arms.
Claim 3
Dependent Claim
23 words
The trolley combination defined in claim 1, wherein said trolley arm further comprises a body and a peripheral outwardly extending rim or flange.
Claim 4
Dependent Claim
30 words
The trolley combination defined in claim 1, wherein said trolley arm upper portion is provided with a recess on its inward side to receive and seat said stub axle therewithin.
Claim 5
Dependent Claim
28 words
The trolley combination defined in claim 1, and including means on the inward side of said trolley arm lower portion engaging said pendant member to limit rotation thereof.
Claim 6
Dependent Claim
27 words
The trolley combination defined in claim 4, wherein said engaging means comprises a pair of spaced apart outwardly extending flanges or ribs locating said pendant member therebetween.
Claim 7
Dependent Claim
33 words
The trolley combination defined in claims 1 or 4, and including means for removably securing and fastening said trolley arms lower portions to each other about a portion of said pendant member therebetween.
Claim 8
Dependent Claim
49 words
The trolley combination defined in claims 1 or 3, wherein said stub axle comprises a hub portion and an annular radially outwardly extending flange at the distal end of said hub portion, the proximal end of said hub portion being secured to and upon said trolley arm upper portion.
Claim 9
Dependent Claim
22 words
The trolley combination defined in claim 7, wherein said stub axle hub portion functions as a support bearing for said trolley wheel.
Claim 10
Dependent Claim
21 words
The trolley combination defined in claim 7, wherein said annular outwardly extending flange functions as a retainer for said trolley wheel.
Claim 11
Dependent Claim
33 words
The trolley combination defined in claim 1, and including means in said stub axle hub portion engagable by said fastening means to removably secure said stub axle to said trolley arm upper portion.
Claim 12
Dependent Claim
32 words
The trolley combination defined in claim 7, wherein said trolley wheel comprises a body having a tapered peripheral surface and an annular flange projecting rearwardly from the proximal side of said body.
Claim 13
Dependent Claim
33 words
The trolley combination defined in claim 11, wherein said wheel body is counterbored on its distal side to receive said stub axle annular flange, and bored to complement said stub axle hub portion.
Claim 14
Dependent Claim
32 words
The trolley combination defined in claim 1, wherein said pendant member comprises a unitary integrally formed molded plastic component having an upper portion, a lower portion and an intermediate transverse rib portion.
Claim 15
Dependent Claim
30 words
The trolley combination defined in claim 13, wherein said pendant member upper portion is secured to and between said trolley arms lower pendant portions and above said intermediate rib portion.
Claim 16
Dependent Claim
27 words
The trolley combination defined in claim 13, wherein said pendant member lower portion embodies means by which material handling devices are removably secured to said lower portion.
Claim 17
Dependent Claim
19 words
The trolley combination defined in claim 13, wherein said pendant member lower portion comprises a male form single element.
Claim 18
Dependent Claim
19 words
The trolley combination defined in claim 13, wherein said pendant member lower portion comprises a yoke form duplex element.
Claim 19
Dependent Claim
41 words
The trolley combination defined in claim 15, wherein said means comprises an opening transversely through said pendant member lower portion and means integrally formed in said lower portion communicating with said opening to provide a weakened factor of predetermined stress-load value.
Claim 20
Dependent Claim
32 words
The trolley combination defined in claim 18, wherein said weakened factor means comprises a pair of notches adjacent and communicating with said opening on either side thereof and substantially in a plane.
References Cited (Backward Citations)
US1761973A
Cited
US2073131A
Cited
US2075261A
Cited
US2101951A
Cited
US2843872A
Cited
US3107947A
Cited
US3268062A
Cited
GB1418823A
Cited
US3926303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |