US3583552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor pan joint
Assignee: R B BOLTON MINING ENGINEERS Ltd
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Filing: 1969-07-17
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Granted: 1971-06-08
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Expires: 1989-07-17
Abstract
Abstract A pan joint for a scraper conveyor consists of blocks secured to adjacent pans and a connecting bolt for linking the two blocks. The bolt has a shank with an enlarged head at each end. Adjacent end portions of the blocks are each provided along one side with a longitudinal channel and these channels house the shank of the connecting bolt, whilst the heads of the bolt are housed in cavities with which the inner ends of the channels respectively communicate. In the first block at least (and preferably in the second block also) the mouth of the channel is extended for a distance over the cavity to provide a pair of flanges for retaining the bolt head against lateral displacement from the cavity. The total length of the channels is less than the length of the bolt shank, the difference in length being less than the extent of the pair of flanges in the first block, but greater than the extent of the pair of flanges (if any) in the second block. Displaceable stop means in the second block limit longitudinal movement of the bolt in the block so as to hold the bolt head at that end within the cavity.
Inventors
- 👤 George Renwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:11
CPC Classifications
B; B65; B65G; B65G19/00; B65G19/18; B65G19/28; B65G19/287
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
277 words
A joint for pans of conveyors of the type in which solid materials are conveyed along a trough by engagement with a series of flights extending transversely across the trough and moving longitudinally along the trough, said joint comprising a first block secured or adapted to be secured to one end portion of one pan and a second block secured or adapted to be secured to one end portion of another pan, such that the blocks lie adjacent each other when the pans are aligned, and a connecting bolt having a shank provided at each end with an enlarged head, adjacent end portions of said blocks each being provided along one side with a longitudinally extending channel, the channels being adapted to house when aligned the shank of the connecting bolt, the inner end of each channel communicating with a cavity provided in the same side of the block and adapted to house a head of the bolt, the elongate mouth portion of the channel in at least the first block being extended for a distance over the cavity so as to provide a pair of flanges for retaining the bolt head against lateral displacement from the cavity, the total length of said channels being less than the length of the bolt shank, the difference in length being less than the extent of said pair of flanges in said first block, but greater than the extent of said pair of flanges (if any) in the second block, displaceable stop means being provided in said second block limiting longitudinal movement of the bolt within the block whereby the bolt head at that end is held within the cavity.
Claim 2
Dependent Claim
277 words
A joint for pans of conveyors of the type in which solid materials are conveyed along a trough by engagement with a series of flights extending transversely across the trough and moving longitudinally along the trough, said joint comprising a first block secured or adapted to be secured to one end portion of one pan and a second block secured or adapted to be secured to one end portion of another pan, such that the blocks lie adjacent each other when the pans are aligned, and a connecting bolt having a shank provided at each end with an enlarged head, adjacent end portions of said blocks each being provided along one side with a longitudinally extending channel, the channels being adapted to house when aligned the shank of the connecting bolt, the inner end of each channel communicating with a cavity provided in the same side of the block and adapted to house a head of the bolt, the elongate mouth portion of the channel in at least the first block being extended for a distance over the cavity so as to provide a pair of flanges for retaining the bolt head against lateral displacement from the cavity, the total length of said channels being less than the length of the bolt shank, the difference in length being less than the extent of said pair of flanges in said first block, but greater than the extent of said pair of flanges (if any) in the second block, displaceable stop means being provided in said second block limiting longitudinal movement of the bolt within the block whereby the bolt head at that end is held within the cavity.
Claim 3
Dependent Claim
35 words
A pan joint according to claim 1 wherein the second block is provided with a said pair of flanges whose extent is not substantially greater than the length of the bolt head which they retain.
Claim 4
Dependent Claim
61 words
A pan joint according to claim 2 wherein said displaceable stop means comprises a member located within the cavity of the second block and pivotable between an operative position wherein it lies closely longitudinally adjacent the bolt head, and an inoperative position wherein it allows the bolt heat in the second block to be longitudinally withdrawn clear of the retaining flanges.
Claim 5
Dependent Claim
41 words
A pan joint according to claim 3 wherein said member is restrained against accidental displacement from one or other said positions by resilient means acting between the member and the block to provide frictional resistance against pivotal movement of the member.
Claim 6
Dependent Claim
61 words
A pan joint according to claim 4 wherein said member is further retaIned in the operative position by means of a transverse step provided on the member engaging a corresponding stepped portion of the block, the two stepped portions being arranged so that their interengagement may be overcome by relative displacement of the member and the block against said resilient means.
Claim 7
Dependent Claim
35 words
A pan joint according to claim 1 wherein the adjacent faces of the blocks are shaped so as to cooperate in limiting the degree of angular displacement between the blocks in one or more directions.
Claim 8
Dependent Claim
48 words
In a conveyor of the type in which solid materials are conveyed along a trough by engagement with a series of flights extending transversely across the trough and moving longitudinally therealong, a trough comprising pans joined end to end by means of pan joints according to claim 1.
Claim 9
Dependent Claim
48 words
In a conveyor of the type in which solid materials are conveyed along a trough by engagement with a series of flights extending transversely across the trough and moving longitudinally therealong, a trough comprising pans joined end to end by means of pan joints according to claim 3.
References Cited (Backward Citations)
US3509987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |