Patent DE1125091B successfully refreshed from Google Patents.
US3876253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine with spray nozzles for supply of dust suppression liquid
Assignee: Dresser Industries Inc
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Filing: 1973-11-05
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Granted: 1975-04-08
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Expires: 1993-11-05
Abstract
Abstract A rotary cutter head for a mining machine with nozzles mounted thereon for supply of dust suppression fluid to the cutting zone of the cutter head. The nozzles are disposed in front of the cutter bits of the head in the plane of rotation of the bits. Each nozzle comprises a block having a nut-like head portion and a screw thread portion. The block is hollow to accommodate internal nozzle components such as an orifice disk, a core and a strainer. The block also has both external and internal threads. A cap is threaded into the internal threads to hold the internal nozzle components in their relative positions. The external threaded portion is screwed into an appropriate opening in the surface of the cutter head presenting a low profile of less than one quarter inch above the surface of the opening.
Inventors
- 👤 John R Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:06
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/187
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
In a rotatable mining head for a mining machine including means for supplying dust suppression liquid to the mining zone through nozzles mounted in openings in the surface of the rotatable mining head, wherein the improvement comprises a low profile nozzle structure comprising: a hollow body externally threaded at one end for insertion into threaded openings in the mining head and having a flat low profile geometrically shaped head at the other end, said geometric head being diametrically larger than the opening in the mining head such that in the installed position it rests tightly against the surface of the mining head forming a low profile projection adapted for engagement by a wrench for quick and easy removal of the nozzle, said nozzle also having an orifice adjacent to the outermost surface of said geometric head and internal nozzle components for insertion in said hollow body and a removable retaining cap adapted for engagement within the hollow body at the end opposite the orifice and effective to hold the internal components within said nozzle.
Claim 2
Dependent Claim
174 words
In a rotatable mining head for a mining machine including means for supplying dust suppression liquid to the mining zone through nozzles mounted in openings in the surface of the rotatable mining head, wherein the improvement comprises a low profile nozzle structure comprising: a hollow body externally threaded at one end for insertion into threaded openings in the mining head and having a flat low profile geometrically shaped head at the other end, said geometric head being diametrically larger than the opening in the mining head such that in the installed position it rests tightly against the surface of the mining head forming a low profile projection adapted for engagement by a wrench for quick and easy removal of the nozzle, said nozzle also having an orifice adjacent to the outermost surface of said geometric head and internal nozzle components for insertion in said hollow body and a removable retaining cap adapted for engagement within the hollow body at the end opposite the orifice and effective to hold the internal components within said nozzle.
Claim 3
Dependent Claim
37 words
In a rotatable mining head as recited in claim 1, the further improvement wherein the removable retaining cap is externally threaded for threaded engagement with internal threads within the end of the hollow body of the nozzle.
Claim 4
Dependent Claim
39 words
In a rotatable mining head as recited in claim 1, the further improvement wherein said orifice is in a removable orifice disc retained by said removable cap against a retaining lip formed in the end of said hollow body.
Claim 5
Dependent Claim
23 words
A rotatable mining head as recited in claim 3, wherein the internal nozzle components include an orifice disc, a core and a strainer.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |