US3753597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mining head with fluid connector means for nozzle
Assignee: Coal Industry Patents Ltd
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Filing: 1971-12-03
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Granted: 1973-08-21
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Expires: 1991-12-03
Abstract
Abstract A cutter head for a mineral mining machine has connecting means for conveying dust suppression fluid to the cutting zone of the head. The connecting means comprises a tubular bush of synthetic plastics material which is inserted into a bore formed in the head. An apertured threaded member, conveniently a nozzle, is cooperable with the bush aperture such that when the mmember is screwed into the bush, the bush is expanded into the bore of the cutter head. In this way the member and the bush are releasably securable within the bore.
Inventors
- 👤 A French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:39
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/187
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A cutter head for a mineral mining machine, including means for conveying dust suppression fluid to the cutting zone of the head, the means including a fluid discharge assembly comprising a first component having a male threaded portion, a synthetic plastic bush into which the male threaded portion of the first component is received, and a second component adapted to accommodate the bush, the threaded portion co-operating within the bush such that when screwed into the accommodated bush the outer diameter of the bush increase and the bush and the first component are thereby releasably secured to the second component, one of the components comprising fluid discharge means.
Claim 2
Dependent Claim
108 words
A cutter head for a mineral mining machine, including means for conveying dust suppression fluid to the cutting zone of the head, the means including a fluid discharge assembly comprising a first component having a male threaded portion, a synthetic plastic bush into which the male threaded portion of the first component is received, and a second component adapted to accommodate the bush, the threaded portion co-operating within the bush such that when screwed into the accommodated bush the outer diameter of the bush increase and the bush and the first component are thereby releasably secured to the second component, one of the components comprising fluid discharge means.
Claim 3
Dependent Claim
21 words
A cutter head as claimed in claim 1, in which the second component has serrations arranged to contact the accommodated bush.
Claim 4
Dependent Claim
23 words
A cutter head as claimed in claim 2, in which the serrations are provided by a female threaded portion of the second component.
Claim 5
Dependent Claim
131 words
A cutter head for a mineral mining machine, including means for conveying dust suppression fluid to the cutting zone of the head, the means comprising a distributor and a synthetic plastic pipe leading from the distributor towards the cutting zone, and further comprising a fluid discharge assembly comprising a first component having a male threaded portion for engagement in the end of the pipe remote from the distributor, and a second component adapted to accommodate the pipe, the threaded portion co-operating within the said end of the pipe such that when screwed into the accommodated pipe the outer diameter of the said end of the pipe increases and the pipe together with the first component are thereby releasably secured to the second component, one of the components comprising fluid discharge means.
Claim 6
Dependent Claim
131 words
A cutter head for a mineral mining machine, including means for conveying dust suppression fluid to the cutting zone of the head, the means comprising a distributor and a synthetic plastic pipe leading from the distributor towards the cutting zone, and further comprising a fluid discharge assembly comprising a first component having a male threaded portion for engagement in the end of the pipe remote from the distributor, and a second component adapted to accommodate the pipe, the threaded portion co-operating within the said end of the pipe such that when screwed into the accommodated pipe the outer diameter of the said end of the pipe increases and the pipe together with the first component are thereby releasably secured to the second component, one of the components comprising fluid discharge means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |