Patent US4934380A successfully refreshed from Google Patents.
US3672488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyors
Assignee: C-TRAK Ltd HILLVIEW WORKS
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Filing: 1970-11-20
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Granted: 1972-06-27
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Expires: 1990-11-20
Abstract
Abstract This invention relates to endless or continuous link conveyors having a series of platforms or supports linked to each other. The links in the present invention are fundamentally metal embedded within plastics materials, the exposed surfaces of the platform or support being of plastics material.
Inventors
- 👤 Bernard Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/02; B65G23/04; B65G23/06; B65G17/00; B65G17/06; B65G17/08; B65G2201/00; B65G2201/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
243 words
An endless conveyor chain link, comprising: a U-shaped, metallic member, tapered longitudinally so that the width of said member is greater at one end than at the other, the sides of said U-shaped member extending outwardly parallel to the longitudinal axis of said member and having co-axial apertures provided in their ends to receive a pivot pin for linking a plurality of members together, the ends of said sides of said member being spaced closer together at one end than the ends of said sides at the other end of said member so that one end of said member may interengage with the corresponding end of an opposite adjoining member; and a platform, comprising a molded envelope of plastic material enclosing the length of said member and extending transversely and symmetrically to each side of said member, so that said member is embedded in said molded envelope, said plastics material extending between the ends of the sides spaced closest to each other so as to form an integral reinforcement and a substantially rectangular-shaped projection from one end of the platform having a cylindrical bore co-axial with said apertures, and extending over the outer faces of the ends of the other sides of said member, forming a U-shaped recess in the platform between the ends of said sides of said U-shaped member and providing a pair of cylindrical reinforcement bores co-axial with said apertures adjacent said ends of said sides of said U-shaped member.
Claim 2
Dependent Claim
243 words
An endless conveyor chain link, comprising: a U-shaped, metallic member, tapered longitudinally so that the width of said member is greater at one end than at the other, the sides of said U-shaped member extending outwardly parallel to the longitudinal axis of said member and having co-axial apertures provided in their ends to receive a pivot pin for linking a plurality of members together, the ends of said sides of said member being spaced closer together at one end than the ends of said sides at the other end of said member so that one end of said member may interengage with the corresponding end of an opposite adjoining member; and a platform, comprising a molded envelope of plastic material enclosing the length of said member and extending transversely and symmetrically to each side of said member, so that said member is embedded in said molded envelope, said plastics material extending between the ends of the sides spaced closest to each other so as to form an integral reinforcement and a substantially rectangular-shaped projection from one end of the platform having a cylindrical bore co-axial with said apertures, and extending over the outer faces of the ends of the other sides of said member, forming a U-shaped recess in the platform between the ends of said sides of said U-shaped member and providing a pair of cylindrical reinforcement bores co-axial with said apertures adjacent said ends of said sides of said U-shaped member.
Claim 3
Dependent Claim
73 words
The endless conveyor chain link as recited in claim 1, wherein said sides of said member are spaced parallel to each other at each end and are disposed at an angle to said member, so that said ends interengage with corresponding opposite ends of another member, and wherein said plastic envelope between and adjacent said sides of said member containing said cylindrical bores form cylindrical members for reinforcing the ends of said member.
Claim 4
Dependent Claim
18 words
The endless conveyor chain link as recited in claim 1, wherein said plastic material is glass reinforced nylon.
Claim 5
Dependent Claim
61 words
The endless conveyor chain link as recited in claim 1, further comprising a plurality of additional U-shaped members interengaged with each other, and a plurality of pins, disposed through said apertures and said cylindrical bores provided in said sides of said members for pivotably joining said members together, so as to provide an endless chain of conveyor platforms pivotably joined together.
Claim 6
Dependent Claim
55 words
The endless conveyor chain link as recited in claim 4, wherein the edges of said platform are disposed at a predetermined inclined angle with respect to the top of said platform so that the edges of said platforms overlap adjacent ends of adjacent platforms when said members are interengaged to form an endless conveyor platform.
Claim 7
Dependent Claim
46 words
The endless conveyor chain link as recited in claim 5, further comprising means for driving the conveyor including a driving sprocket having a plurality of circumferential grooves for engaging said molded plastic cylindrical members between and adjacent said ends of said sides of said U-shaped member.
References Cited (Backward Citations)
GB842230A
Cited
US3188795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |