US3926303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor trolley clevis hanger safety attachment device
Assignee: Formall Inc
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Filing: 1974-09-23
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Granted: 1975-12-16
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Expires: 1994-09-23
Abstract
Abstract In a hanger device for removable attachment to the clevis of a conveyor trolley, a hanger proximal pad portion or member secured by the clevis pin and a pair of removable lateral safety retaining pads or members overlying the headed ends of the clevis pin, to provide a safety hanger. The hanger device is preferably fabricated of a plastic material providing a high load bearing surface for the clevis pin, substantially improving the functional operation of the hanger. The lateral safety retaining members at least temporarily secure and support the hanger device upon the headed ends of the clevis pin in the event that the hanger proximal pad portion, at the clevis pin bearing opening, should fail for any reason. A vertical change in position of the hanger upon the trolley clevis pin also signals the need for remedial action to protect the hanger and its load before ultimate failure. In addition, fabricating the clevis safety attachment device and hanger of a suitable plastic material permits coloring the device throughout to meet required government-ordered safety specifications.
Inventors
- 👤 John W Mccall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:47
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/20; B65G2201/00; B65G2201/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
119 words
A parts-carrying safety hanger device for removable securement to an overhead conveyor trolley clevis by a headed clevis pin, said device comprising a proximal pad portion having a body, a bearing opening transversely through said body for the shaft portion of said clevis pin, and a pair of lugs extending laterally, one from each side of said body, a rod portion connected to said proximal pad portion and depending therefrom, and having one or more parts-carrying arms connected thereto, and a pair of safety retaining members movably conjoined to said lugs, one on each side of said proximal pad portion, to overlie the outer ends of said clevis pin when said members are aligned with said proximal pad portion.
Claim 2
Dependent Claim
119 words
A parts-carrying safety hanger device for removable securement to an overhead conveyor trolley clevis by a headed clevis pin, said device comprising a proximal pad portion having a body, a bearing opening transversely through said body for the shaft portion of said clevis pin, and a pair of lugs extending laterally, one from each side of said body, a rod portion connected to said proximal pad portion and depending therefrom, and having one or more parts-carrying arms connected thereto, and a pair of safety retaining members movably conjoined to said lugs, one on each side of said proximal pad portion, to overlie the outer ends of said clevis pin when said members are aligned with said proximal pad portion.
Claim 3
Dependent Claim
26 words
The safety hanger device defined in claim 1, wherein said proximal pad and rod portions are formed integrally as a unit of a molded plastic material.
Claim 4
Dependent Claim
29 words
The safety hanger device defined in claim 1, wherein said proximal pad and rod portions are independent and separable, and means to secure said portions together as a unit.
Claim 5
Dependent Claim
16 words
The safety hanger device defined in claim 1, wherein said proximal pad portion is substantially planar.
Claim 6
Dependent Claim
24 words
The safety hanger device defined in claim 1, wherein said parts-carrying arms comprise a plurality of said arms extending laterally from said rod portion.
Claim 7
Dependent Claim
24 words
The safety hanger device defined in claim 1, wherein said parts-carrying arms comprise a plurality of said arms extending radially from said rod portion.
Claim 8
Dependent Claim
41 words
The safety hanger device defined in claim 1, wherein each said safety retaining member is provided with a depending flange having an entry and a slot for one said lug, whereby said member is slidable upon and pivotable about said lug.
Claim 9
Dependent Claim
51 words
The safety hanger device defined in claim 7, wherein said safety retaining member above said depending flange comprises an outer wall, an upper wall, a side wall and a downwardly extending wall portion connected to said upper wall defining a recess area therewithin for a headed end of said clevis pin.
Claim 10
Dependent Claim
39 words
The safety hanger device defined in claim 8, and including a shoulder on said depending flange aligned with and spaced from said downwardly extending wall portion defining an entry for said clevis pin headed end to said recess area.
Claim 11
Dependent Claim
23 words
The safety hanger device defined in claim 1, wherein said lugs are axially aligned and project laterally from each side of said body.
Claim 12
Dependent Claim
17 words
The safety hanger device defined in claim 10, wherein said lugs are headed at their distal ends.
Claim 13
Dependent Claim
25 words
The safety hanger device defined in claim 11, wherein said safety retaining members are provided with means for removable and pivotable attachment to said lugs.
Claim 14
Dependent Claim
63 words
The safety hanger device defined in claim 12, wherein said means for removable and pivotable attachment comprises a transverse opening adjacent said depending flange, and edge portions adjacent and defining said slot in said depending flange, said transverse opening adapted to receive and pass said headed lug therethrough, said edge portions adapted to pass said lug therebetween and to engage said lug head.
Claim 15
Dependent Claim
35 words
The safety hanger device defined in claim 1, wherein said proximal pad portion, said rod portion and said sAfety retaining members are formed of a molded plastic material having a substantially high impact resistance character.
Claim 16
Dependent Claim
25 words
The safety hanger device defined in claim 14, wherein said plastic material is further characterized by having substantially high tensile strength and high load-bearing qualities.
Claim 17
Dependent Claim
32 words
The safety hanger device defined in claim 14, wherein said plastic material is further characterized by having substantially high resistance to deformation at ambient temperatures, corrosive atmospheres, chemical solutions and physical abrasion.
Claim 18
Dependent Claim
23 words
The safety hanger device defined in claim 14, wherein said plastic material is further characterized by being foamed and reinforced with fiberglass filaments.
Claim 19
Dependent Claim
21 words
The safety hanger device defined in claim 14, wherein said plastic material is further characterized by being reinforced with fiberglass filaments.
References Cited (Backward Citations)
US2892419A
Cited
US3724387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |