Patent US3556193A successfully refreshed from Google Patents.
US3677515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for combustion tubes
Assignee: Individual
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Filing: 1970-11-16
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Granted: 1972-07-18
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Expires: 1990-11-16
Abstract
Abstract A coupling for connecting a thermal lance to an oxygen supply pipe having a casing with a valve therein held shut by a spring and the casing having an axial passage therein fitted with a pipe connection and a plunger therein slidable to open the valve, a clamping device is provided in the casing having at least one resilient ring-shaped member at that end of the hollow plunger which faces away from the valve and the clamping device adapted to receive the lance.
Inventors
- 👤 Edwin Eduard Fassler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:48
CPC Classifications
F; F16; F16L; F16L29/00; E; E21; E21B; E21B7/00; E21B7/14; E21B7/146; F16L7/00; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
A coupling for connecting a thermal lance to an oxygen supply pipe, said coupling comprising a casing having a passage therethrough, means for connecting an oxygen supply pipe to said casing so as to provide communication with said passage, a valve seat in said passage downstream of said connecting means, a valve in said passage downstream of said connecting means, means for resiliently biassing said valve to a closed position against said valve seat, a hollow plunger downstream of said valve, said plunger being slidably disposed in said Passage and being arranged to abut against said valve and a clamping device in said passage for holding a lance in the coupling, said clamping device including a resilient annular-section member and a capping nut threadedly engaged with said casing and arranged, when tightened, to deform said resilient member to grip the inserted lance, said plunger being displaced toward said valve by said lance to thereby open said valve against said resilient biassing means, said plunger being displaced away from said valve to thereby close said valve when a flame reaches the vicinity of said clamping device which thereby scorches said resilient member and causes it to release its grip of the inserted lance. CM,2Ce coupling as claimed in claim 1, in which s said hollow plunger is provided with different sized annular contact faces at its end remote from said valve for respectively centering lance tubes of different outside diameters. members
Claim 2
Dependent Claim
49 words
A lance coupling as claimed in claim 1 in which said clamping device further includes a ring member of unyielding material located in abutment with opposite end faces of said passage and said capping nut, each having an internal shoulder therein, said ring members abutting respectively against said shoulders.
Claim 3
Dependent Claim
41 words
A lance coupling as claimed in claim 3 in which said capping nut is externally threaded at its outer end, and a frustoconical guard having means engaging said nut outer end for protecting the hand of an operator grasping said casing.
Claim 4
Dependent Claim
43 words
A lance coupling as claimed in claim 4 in which said supply pipe connecting means comprises a gland member threadedly engaged with an end of said passage remote from said capping nut, and an interchangeable pipe-union nipple threadedly engaged with said gland member.
Claim 5
Dependent Claim
17 words
A lance coupling as claimed in claim 1 in which said resilient member is made of rubber.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |