US3907157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-03-15
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Granted: 1975-09-23
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Expires: 1994-03-15
Abstract
Abstract A locking device is provided for a pressure vessel comprising a swing bolt adapted to be pivotally mounted upon the body of a pressure vessel and to be swung between (i) a locking position in which the bolt is adapted to couple the body of the vessel to a closure member when an associated nut, held captive on the bolt, is tightened, and (ii) a release position in which the bolt is clear of the closure member, the said bolt being provided with cam means adapted to co-operate with a projection carried by the closure member and thereby obstruct closure of the vessel until the bolt is in the locking position, catch means also being provided for preventing the said bolt from being swung out of the locking position until the said nut has been loosened to a predetermined extent.
Inventors
- 👤 David Anthony Beattie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:04
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; F16J13/06; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/221; Y10T292/223
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
186 words
A pressure vessel safety lock comprising: a swing bolt pivotally mounted to a pressure vessel so as to be movable to opened and closed positions wherein said swing bolt comprises a mounting portion having a shaft extending therefrom, said shaft having a threaded top portion having a nut member thereon, a stop device attached to said mounting portion, a lid for said vessel, a bracket fixed to the lid, said bracket having two arms extending away from the lid defining a slot therebetween, at least one projection attached to the bottom of said bracket and extending downwardly therefrom beyond said lid, means mounted on said bracket and adapted to engage said nut member so that said means are engaged by said nut member to close said lid upon tightening of said nut member and engaged by said nut member upon loosening of said nut member to raise said lid, said stop device being mounted on said bolt such that said at least one projection contacts said stop device when said bolt is in an open position so as to prevent further downward movement of said lid.
Claim 2
Dependent Claim
186 words
A pressure vessel safety lock comprising: a swing bolt pivotally mounted to a pressure vessel so as to be movable to opened and closed positions wherein said swing bolt comprises a mounting portion having a shaft extending therefrom, said shaft having a threaded top portion having a nut member thereon, a stop device attached to said mounting portion, a lid for said vessel, a bracket fixed to the lid, said bracket having two arms extending away from the lid defining a slot therebetween, at least one projection attached to the bottom of said bracket and extending downwardly therefrom beyond said lid, means mounted on said bracket and adapted to engage said nut member so that said means are engaged by said nut member to close said lid upon tightening of said nut member and engaged by said nut member upon loosening of said nut member to raise said lid, said stop device being mounted on said bolt such that said at least one projection contacts said stop device when said bolt is in an open position so as to prevent further downward movement of said lid.
Claim 3
Dependent Claim
58 words
A pressure vessel safety lock as claimed in claim 1 wherein said shaft has middle and bottom portions, said bottom portion being adjacent said mounting portion, said middle portion being adapted to engage with said slot, and wherein the walls of said slot adjacent the rear portion of said slot define an enlarged opening extending through said bracket.
Claim 4
Dependent Claim
57 words
A pressure vessel safety lock as claimed in claim 2 wherein said top and middle portions of said shaft are of a smaller diameter than said bottom portion, said middle portion being flattened so as to slidably engage with said slot, said bottom portion of said shaft extending into said enlarged opening when said lid is closed.
Claim 5
Dependent Claim
178 words
A pressure safety lock comprising: a swing bolt pivotally mounted to a pressure vessel so as to be movable between open and closed positions, wherein said swing bolt comprises a mounting portion having a shaft extending therefrom, said shaft having a threaded portion, said swing bolt including a stop device movable therewith, a lid for said vessel, a bracket member fixed to said lid so that at least a portion extends away from said lid, said portion including at least one downwardly projecting member, a nut member having a threaded inner portion adapted to engage the threaded portion of said swing bolt, said nut member further comprising an outer surface adapted to engage said bracket so as to close said lid upon the tightening of said nut member to said swing bolt and to rise said lid upon the loosening of said nut member on said swing bolt, said stop device being positioned such that said projection contacts said stop device when said swing bolt is in an open position thereby preventing further downward movement of said lid.
Claim 6
Dependent Claim
178 words
A pressure safety lock comprising: a swing bolt pivotally mounted to a pressure vessel so as to be movable between open and closed positions, wherein said swing bolt comprises a mounting portion having a shaft extending therefrom, said shaft having a threaded portion, said swing bolt including a stop device movable therewith, a lid for said vessel, a bracket member fixed to said lid so that at least a portion extends away from said lid, said portion including at least one downwardly projecting member, a nut member having a threaded inner portion adapted to engage the threaded portion of said swing bolt, said nut member further comprising an outer surface adapted to engage said bracket so as to close said lid upon the tightening of said nut member to said swing bolt and to rise said lid upon the loosening of said nut member on said swing bolt, said stop device being positioned such that said projection contacts said stop device when said swing bolt is in an open position thereby preventing further downward movement of said lid.
Claim 7
Dependent Claim
136 words
A pressure safety lock comprising: a swing bolt pivotally mounted to a pressure vessel so as to be movable between open and closed positions, wheRein said swing bolt comprises a mounting portion having a shaft extending therefrom, said shaft having a threaded portion, a lid for said vessel, a bracket member fixed to said lid so that at least a portion extends beyond said lid, a nut member having a threaded inner portion adapted to engage the threaded portion of said swing bolt, said nut member further comprising an outer surface adapted to engage said bracket so as to close said lid upon the tightening of said nut member to said swing bolt and to raise said swing bolt and means for preventing closure of said lid when said swing bolt is in its open position.
Claim 8
Dependent Claim
136 words
A pressure safety lock comprising: a swing bolt pivotally mounted to a pressure vessel so as to be movable between open and closed positions, wheRein said swing bolt comprises a mounting portion having a shaft extending therefrom, said shaft having a threaded portion, a lid for said vessel, a bracket member fixed to said lid so that at least a portion extends beyond said lid, a nut member having a threaded inner portion adapted to engage the threaded portion of said swing bolt, said nut member further comprising an outer surface adapted to engage said bracket so as to close said lid upon the tightening of said nut member to said swing bolt and to raise said swing bolt and means for preventing closure of said lid when said swing bolt is in its open position.
Claim 9
Dependent Claim
84 words
A pressure safety lock as claimed in claim 5 wherein said closure preventing means comprises a stop device forming a part of said swing bolt and a downwardly projecting member forming a part of said bracket, said stop device and said projecting member being positioned such that said projecting member will come into contact with said stop device when said lid is lowered into place on said vessel and said swing bolt is in its open position thereby preventing further lowering of said lid.
References Cited (Backward Citations)
US2113776A
Cited
US3187929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |