US3815927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket structure and method of manufacture
Assignee: METALLO GASKET CO
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Filing: 1972-11-24
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Granted: 1974-06-11
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Expires: 1992-11-24
Abstract
Abstract A centering device for a spiral-wound gasket, comprising a thin, flat metal plate having an aperture for receiving the gasket, wherein an aperture-surrounding edge portion of the plate is bent to form a continuous grooved lip, projecting on each side of the plate, for securely holding a circumferential bead on the gasket with opposite faces of the gasket disposed in planes respectively spaced from opposite sides of the plate. A solid metal O-ring may be mounted in the plate, in spaced concentric relation to the gasket, for limiting compression of the gasket when the gasket is clamped, e.g., between facing pipe flanges. An annular retaining ring carrying another similar O-ring may be mounted within the inner periphery of the gasket. To assemble the device with a gasket, the lip is first formed by bending operations; the gasket is then inserted, and the lip is clamped around the gasket bead.
Inventors
- 👤 S Geipel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/003; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/125
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
Gasket structure comprising a. a spiral-wound annular gasket having spaced, opposed gasket faces and an outwardly projecting bead extending around the outer periphery of the gasket and centrally disposed therein intermediate said faces; and b. a flat metal plate substantially thinner than said gasket, having an aperture dimensioned to receive said gasket, and in which said gasket is disposed; c. said plate having an annular edge portion surrounding said aperture and including i. a first, inwardly bent annular leg projecting from one side of said plate, ii. a second, reversely bent annular leg disposed inwardly of said first leg; and iii. a third, inwardly bent annular leg projecting from said second leg on the other side of said plate and cooperating with said second leg to define an inwardly opening annular groove receiving and securely holding the bead of said gasket with the opposed gasket faces lying in planes respectively spaced from opposite sides of said plate.
Claim 2
Dependent Claim
157 words
Gasket structure comprising a. a spiral-wound annular gasket having spaced, opposed gasket faces and an outwardly projecting bead extending around the outer periphery of the gasket and centrally disposed therein intermediate said faces; and b. a flat metal plate substantially thinner than said gasket, having an aperture dimensioned to receive said gasket, and in which said gasket is disposed; c. said plate having an annular edge portion surrounding said aperture and including i. a first, inwardly bent annular leg projecting from one side of said plate, ii. a second, reversely bent annular leg disposed inwardly of said first leg; and iii. a third, inwardly bent annular leg projecting from said second leg on the other side of said plate and cooperating with said second leg to define an inwardly opening annular groove receiving and securely holding the bead of said gasket with the opposed gasket faces lying in planes respectively spaced from opposite sides of said plate.
Claim 3
Dependent Claim
42 words
Structure as defined In claim 1, wherein said annular edge portion projects, on each side of said plate, for a distance substantially less than the spacing between said plate and the plane containing the gasket face on that side of said plate.
Claim 4
Dependent Claim
18 words
Structure as defined in claim 1, wherein said groove lies in a plane substantially coincident with said plate.
Claim 5
Dependent Claim
59 words
Structure as defined in claim 1, further including stop means carried by said plate for limiting compression of said gasket in a direction transverse to the faces thereof when said gasket is clamped between facing surfaces, said stop means being adapted to engage and resist gasket-compressing movement of the facing surfaces substantially uniformly around the circumference of said gasket.
Claim 6
Dependent Claim
41 words
Structure as defined in claim 4, wherein said stop means comprises at least one substantially incompressible element disposed for abutment with the facing surfaces to arrest gasket-compressing movement thereof, said element having a thickness less than the thickness of said gasket.
Claim 7
Dependent Claim
58 words
Structure as defined in claim 5, wherein said plate has an annular recess formed therein in concentric, outwardly spaced relation to said annular edge portion, and wherein said substantially incompressible element comprises an O-ring fixedly clamped by said plate within said recess, said plate and said O-ring having a combined thickness less than the thickness of said gasket.
Claim 8
Dependent Claim
79 words
Structure as defined in claim 6, further including a retaining ring comprising a flat annular metal plate engaged with and projecting inwardly from the inner periphery of said gasket, said retaining ring having an annular recess disposed in concentric, inwardly spaced relation to said gasket; and a second substantially incompressible O-ring fixedly clamped by said retaining ring within said last-mentioned recess, said retaining ring and said second O-ring having a combined thickness less than the thickness of said gasket.
Claim 9
Dependent Claim
159 words
A centering device for a spiral-wound annular gasket having spaced, opposed gasket faces and an outwardly projecting bead extending around the outer periphery of the gasket and centrally disposed thereon intermediate said faces, said device comprising a. a flat metal plate substantially thinner than said gasket, having an aperture dimensioned to receive said gasket; b. said plate having an annular edge portion surrounding said aperture and including i. a first, inwardly bent annular leg projecting from one side of said plate, ii. a second, reversely bent annular leg disposed inwardly of said first leg, and iii. a third, inwardly bent annular leg projecting from said second leg on the other side of said plate and cooperating with said second leg to define an inwardly opening annular groove for receiving and securely holding the bead of said gasket in a position in which the opposed faces of said gasket lie in planes respectively spaced from opposite sides of said plate.
Claim 10
Dependent Claim
159 words
A centering device for a spiral-wound annular gasket having spaced, opposed gasket faces and an outwardly projecting bead extending around the outer periphery of the gasket and centrally disposed thereon intermediate said faces, said device comprising a. a flat metal plate substantially thinner than said gasket, having an aperture dimensioned to receive said gasket; b. said plate having an annular edge portion surrounding said aperture and including i. a first, inwardly bent annular leg projecting from one side of said plate, ii. a second, reversely bent annular leg disposed inwardly of said first leg, and iii. a third, inwardly bent annular leg projecting from said second leg on the other side of said plate and cooperating with said second leg to define an inwardly opening annular groove for receiving and securely holding the bead of said gasket in a position in which the opposed faces of said gasket lie in planes respectively spaced from opposite sides of said plate.
Claim 11
Dependent Claim
40 words
Structure as defined in claim 8, wherein said plate has an annular recess formed therein in concentric, outwardly spaced relation to said annular edge portion, and further including a substantially incompressible O-ring fixedly clamped by said plate within said recess.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |