US3582090A
Expired / Lapsed
US
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Face seal structure
Assignee: E-C Corp
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Filing: 1968-11-06
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Granted: 1971-06-01
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Expires: 1988-11-06
Abstract
Abstract A face seal structure for sealing around intermittently communicating ports formed through two parallel planar faces which move relative to each other due to the rotation of one of the faces about a rotational axis extending substantially normal thereto. The seal structure includes a rigid seal plate between the faces and having parallel planar surfaces which are parallel to the faces. The seal plate is keyed to a first of the faces and has at least one opening through it which is aligned with a port through the face to which it is keyed, and which is periodically alignable with at least one port through the second face. A first sealing element of high shear strength and having a flat bearing surface of low coefficient of friction sealingly engages the second face, and is secured on one of the surfaces of the plate around the opening therethrough. A second sealing element is positioned between, and sealingly engages, the seal plate and the face to which the plate is keyed. Each of the first and second sealing elements defines an area within itself which includes the opening through the plate, and each is geometrically configured and located around the opening through the plate so that minimum force due to the pressure of fluid passed from one port to the other through the opening in the plate acts at all times during relative movement between the faces to bias the first sealing element into sealing contact with the second face.
Inventors
- 👤 Jerry L Lott
- 👤 Hadi T Hashemi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:14
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F15; F15B; F15B13/00; F15B21/00; F16; F16J; F16J15/00; F16J15/16; F16J15/34; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87724
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
242 words
In combination with two relatively moving solid bodies having substantially parallel, planar faces having ports therein which periodically communicate during such relative movement, and are periodically out of communication, a face seal structure positioned between the solid bodies and comprising: a seal plate having opposed, parallel, planar surfaces and having an opening thErethrough positioned for periodic registry with both said ports in said faces, and periodic nonregistration with one of said ports; means keying the seal plate to one of the bodies for movement therewith relative to the other body, and for registration of said opening with the port in the face carried by said one body; a first sealing element of low coefficient of friction, high shear strength material secured to said seal plate around said opening and having a monoplanar bearing surface sealingly contacting the face of said other body; and a second sealing element on the opposite side of said seal plate from said first sealing element and sealingly positioned between said one body and said seal plate at a location surrounding said opening, said first and second sealing elements being configured to limit the areas upon which fluid pressure acts on the opposite sides of said sealing plate to minimize the net positive force due to fluid pressure acting to force said planar bearing surface against the face of said other body when the port in the face of said other body is not aligned with said opening.
Claim 2
Dependent Claim
242 words
In combination with two relatively moving solid bodies having substantially parallel, planar faces having ports therein which periodically communicate during such relative movement, and are periodically out of communication, a face seal structure positioned between the solid bodies and comprising: a seal plate having opposed, parallel, planar surfaces and having an opening thErethrough positioned for periodic registry with both said ports in said faces, and periodic nonregistration with one of said ports; means keying the seal plate to one of the bodies for movement therewith relative to the other body, and for registration of said opening with the port in the face carried by said one body; a first sealing element of low coefficient of friction, high shear strength material secured to said seal plate around said opening and having a monoplanar bearing surface sealingly contacting the face of said other body; and a second sealing element on the opposite side of said seal plate from said first sealing element and sealingly positioned between said one body and said seal plate at a location surrounding said opening, said first and second sealing elements being configured to limit the areas upon which fluid pressure acts on the opposite sides of said sealing plate to minimize the net positive force due to fluid pressure acting to force said planar bearing surface against the face of said other body when the port in the face of said other body is not aligned with said opening.
Claim 3
Dependent Claim
15 words
The combination defined in claim 1 wherein said first sealing element comprises a polyimide resin.
Claim 4
Dependent Claim
28 words
The combination defined in claim 1 wherein said second sealing element comprises an elastomeric O-ring seal secured to said opposite side of the seal plate around said opening.
Claim 5
Dependent Claim
61 words
The combination defined in claim 3 wherein said O-ring seal encloses an area of one of the planar surfaces of said seal plate which is on the opposite side of said seal plate from a portion of the opposite surface thereof across which one of said ports passes as said bodies and the faces carried thereby move relative to each other.
Claim 6
Dependent Claim
183 words
A face seal structure for sealing between relatively moving parallel planar faces having two fluid-conveying ports periodically in the faces which periodically communicate, said face seal structure comprising: a seal plate having two opposed, parallel, planar surfaces, and having at least one opening therethrough through which said ports periodically communicate with each other; a first sealing element configured as a flat sheet bonded to one of said planar surfaces around said opening and having a dynamic coefficient of friction in air of less than 0.20, a tensile strength at 73* F. of at least 6,000 p.s.i., and an ultimate elongation in tension at 73* F. of from about 4 percent to about 6 percent; and a second sealing element around said opening on the opposite side of said sealing plate from said first sealing element; and means for keying said seal plate to one of said faces for movement therewith relative to the other face with said one surface of said sealing plate extending parallel to said one face and positioned on the opposite side of said seal plate from said one face.
Claim 7
Dependent Claim
183 words
A face seal structure for sealing between relatively moving parallel planar faces having two fluid-conveying ports periodically in the faces which periodically communicate, said face seal structure comprising: a seal plate having two opposed, parallel, planar surfaces, and having at least one opening therethrough through which said ports periodically communicate with each other; a first sealing element configured as a flat sheet bonded to one of said planar surfaces around said opening and having a dynamic coefficient of friction in air of less than 0.20, a tensile strength at 73* F. of at least 6,000 p.s.i., and an ultimate elongation in tension at 73* F. of from about 4 percent to about 6 percent; and a second sealing element around said opening on the opposite side of said sealing plate from said first sealing element; and means for keying said seal plate to one of said faces for movement therewith relative to the other face with said one surface of said sealing plate extending parallel to said one face and positioned on the opposite side of said seal plate from said one face.
Claim 8
Dependent Claim
27 words
A face seal structure as defined in claim 5 wherein said seal plate opening is arcuate and extends along a portion of the circumference of a circle.
Claim 9
Dependent Claim
28 words
A face seal structure as defined in claim 5 and further characterized to include a rib retaining said first sealing element against sliding movement on said one surface.
Claim 10
Dependent Claim
20 words
A face seal structure as defined in claim 5 wherein said first sealing element is a graphite impregnated polyimide resin.
Claim 11
Dependent Claim
19 words
A face seal structure as defined in claim 5 wherein said second sealing element is an elastomeric O-ring seal.
Claim 12
Dependent Claim
129 words
A face seal structure as defined in claim 5 wherein said first sealing element is characterized in having a flat, exposed sealing and bearing surface extending parallel to said one surface and surrounding said opening; and wherein said second sealing element extends around and seals off an area on the planar surface of said seal plate opposite the planar surface to which said first sealing element is bonded, said area being such that a fluid pressure acting thereon as said faces move relative to each other to communicate said ports through said opening will force said plate away from said one face toward the other face at all times during said relative movement whereby said flat sealing and bearing surface is forced into sealing engagement with said other face.
Claim 13
Dependent Claim
87 words
A face seal structure as defined in claim 6 wherein said seal plate contains a pair of said arcuate openings both located on a common circle and having their ends spaced from each other; and wherein said second sealing element extends around and seals off an area on the planar surface of said seal plate opposite the planar surface to which said first sealing element is bonded, said area including portions of the planar surface on which it is located which are disposed between said arcuate openings.
Claim 14
Dependent Claim
130 words
A face seal structure as defined in claim 11 wherein said first sealing element is characterized in having a flat, exposed sealing and bearing surface extending parallel to said one surface and surrounding said opening; and wherein said second sealing element is an elastomeric O-ring seal mounted on said seal plate, the area surrounded and sealed off by said O-ring seal being such in relation to the area of said sealing and bearing surface that a fluid pressure acting thereon from the ports in said faces as said faces move relative to each other will force said plate away from said one face toward the other face at all times during said relative movement whereby said flat sealing and bearing surface is forced into sealing engagement with said other face.
Claim 15
Dependent Claim
185 words
A face seal structure for securement to one ported planar surface which is held stationary as a second, parallel, ported planar surface is rotated about an axis extending normal to both planar surfaces to periodically bring the port therein into alignment with the port in said first mentioned planar surface, said face seal structure comprising: a disc-shaped seal plate having opposed, parallel, planar sides and having an opening therethrough through which the ports in said planar surfaces can periodically communicate with each other as said second planar surface is rotated; a sheet of polyimide resin bonded to one of the planar sides of said seal plate and having an exposed flat surface extending parallel to the planar side of the seal plate to which it is bonded, and surrounding said opening in the seal plate; and an O-ring seal secured to, and sealingly engaging, the second planar side of the seal plate opposite the side thereof bonded to said sheet of polyimide resin, said O-ring seal surrounding said opening and projecting away from said seal plate in a direction normal to the planar sides thereof.
Claim 16
Dependent Claim
185 words
A face seal structure for securement to one ported planar surface which is held stationary as a second, parallel, ported planar surface is rotated about an axis extending normal to both planar surfaces to periodically bring the port therein into alignment with the port in said first mentioned planar surface, said face seal structure comprising: a disc-shaped seal plate having opposed, parallel, planar sides and having an opening therethrough through which the ports in said planar surfaces can periodically communicate with each other as said second planar surface is rotated; a sheet of polyimide resin bonded to one of the planar sides of said seal plate and having an exposed flat surface extending parallel to the planar side of the seal plate to which it is bonded, and surrounding said opening in the seal plate; and an O-ring seal secured to, and sealingly engaging, the second planar side of the seal plate opposite the side thereof bonded to said sheet of polyimide resin, said O-ring seal surrounding said opening and projecting away from said seal plate in a direction normal to the planar sides thereof.
Claim 17
Dependent Claim
43 words
A face seal structure as defined in claim 13 wherein the area of said flat surface is between one and two times the area of that portion of said second planar side of the seal plate which is enclosed within said O-ring seal.
Claim 18
Dependent Claim
151 words
A face seal structure for sealing between relatively moving, parallel, monoplanar faces each having a pair of ports therein with the pair of ports in one face periodically registering with the pair of ports in the other face as the faces move relatively to each other, said face seal structure comprising: a disc-shaped seal plate means having: a substantially monoplanar bearing and sealing surface on one side thereof, and having a pair of spaced openings therethrough which open through said bearing and sealing surface and are positioned therein for concurrent registration with the ports in said faces as said faces move relative to each other; and a sealing portion on the other side thereof surrounding said openings and isolating said openings each from the other; and means for keying said seal plate means to one of said parallel monoplanar faces for movement therewith relative to the other of said monoplanar faces.
Claim 19
Dependent Claim
151 words
A face seal structure for sealing between relatively moving, parallel, monoplanar faces each having a pair of ports therein with the pair of ports in one face periodically registering with the pair of ports in the other face as the faces move relatively to each other, said face seal structure comprising: a disc-shaped seal plate means having: a substantially monoplanar bearing and sealing surface on one side thereof, and having a pair of spaced openings therethrough which open through said bearing and sealing surface and are positioned therein for concurrent registration with the ports in said faces as said faces move relative to each other; and a sealing portion on the other side thereof surrounding said openings and isolating said openings each from the other; and means for keying said seal plate means to one of said parallel monoplanar faces for movement therewith relative to the other of said monoplanar faces.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |