US3564977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torqueless compression seal
Assignee: Individual
•
Filing: 1968-04-01
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Granted: 1971-02-23
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Expires: 1988-04-01
Abstract
Abstract Plastic film in disc form is seated on a support in an opening of equal diameter in a metal body. A second metal body extending into the opening has an annular end rib abutting the film near its periphery. The two metal bodies are welded by parent metal, such welding being effected while the bodies are axially pressed together, and which upon solidifying holds the bodies drawn together. A fluid-tight mechanical seal is thus formed between the plastic film and the parts between which it is sandwiched.
Inventors
- 👤 Allen Van Cleve Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:18
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
In combination: a pair of cylindrical metal elements having confronting annular faces; compressible seal means including a pair of thin film diaphragms, the outer diameters of which are substantially that of the outer diameters of said faces; a thin metal ring between said diaphragms and having an outer diameter substantially that of said diaphragms; a weld bonding said metal elements together to compress and hold said diaphragms and metal ring, and thereby form a leakproof seal, between said faces; a rigid disc on one side of one diaphragm, the inner diameter of said ring being greater than the diameter of said disc; and means normally holding said disc in a position to engage said one diaphragm, said disc being movable against said holding means in response to pressure of predetermined magnitude applied to the other diaphragm.
Claim 2
Dependent Claim
136 words
In combination: a pair of cylindrical metal elements having confronting annular faces; compressible seal means including a pair of thin film diaphragms, the outer diameters of which are substantially that of the outer diameters of said faces; a thin metal ring between said diaphragms and having an outer diameter substantially that of said diaphragms; a weld bonding said metal elements together to compress and hold said diaphragms and metal ring, and thereby form a leakproof seal, between said faces; a rigid disc on one side of one diaphragm, the inner diameter of said ring being greater than the diameter of said disc; and means normally holding said disc in a position to engage said one diaphragm, said disc being movable against said holding means in response to pressure of predetermined magnitude applied to the other diaphragm.
Claim 3
Dependent Claim
13 words
The combination of claim 1, wherein the surfaces of said ring are roughened.
Claim 4
Dependent Claim
41 words
The combination of claim 2, including: a plastic disc between said rigid disc and said one diaphragm, the diameter of said plastic disc being greater than the diameter of said rigid disc but less than the inner diameter of said ring.
Claim 5
Dependent Claim
155 words
In combination: a pair of cylindrical metal elements having confronting annular faces; diaphragm means having an edge portion between said faces; a weld bonding said metal elements together to axially compress and hold said edge portion between said faces so as to form a leakproof seal, said diaphragm means having the characteristic that prior to solidification of said weld said edge portion is not axially clamped with sufficient force to establish a leakproof seal, but that during solidification of the weld the shrinkage thereof forces said faces against said edge portion so as to form a leakproof seal; a rigid element supported for sliding movement on one side of said diaphragm means; and means normally holding said rigid element in engagement with said one side of said diaphragm means, said rigid element beinG movable against said holding means in response to a force of predetermined magnitude applied to the other side of said diaphragm means.
Claim 6
Dependent Claim
155 words
In combination: a pair of cylindrical metal elements having confronting annular faces; diaphragm means having an edge portion between said faces; a weld bonding said metal elements together to axially compress and hold said edge portion between said faces so as to form a leakproof seal, said diaphragm means having the characteristic that prior to solidification of said weld said edge portion is not axially clamped with sufficient force to establish a leakproof seal, but that during solidification of the weld the shrinkage thereof forces said faces against said edge portion so as to form a leakproof seal; a rigid element supported for sliding movement on one side of said diaphragm means; and means normally holding said rigid element in engagement with said one side of said diaphragm means, said rigid element beinG movable against said holding means in response to a force of predetermined magnitude applied to the other side of said diaphragm means.
Claim 7
Dependent Claim
19 words
The combination of claim 4, wherein said edge portion of said diaphragm means includes layers of plastic and metal.
Claim 8
Dependent Claim
48 words
The combination of claim 4, wherein the force which said weld causes said faces to exert against said edge portion is substantially greater than the force of said predetermined magnitude applied to said other side of said diaphragm means for moving said rigid element against said holding means.
Claim 9
Dependent Claim
28 words
The combination of claim 6, wherein said diaphragm means includes a pair of thin plastic diaphragms; and a metal ring between the edge portions of said plastic diaphragms.
Claim 10
Dependent Claim
26 words
The combination of claim 4, wherein one of said metal elements in the vicinity exhibits a spring action and undergoes elongation during shrinkage of said weld.
References Cited (Backward Citations)
US2811168A
Cited
US2932321A
Cited
US2832573A
Cited
US2992652A
Cited
US3049931A
Cited
US3135173A
Cited
US3325191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |