US4055205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Press seal
Assignee: Blandin Wood Products Co
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Filing: 1976-07-16
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Granted: 1977-10-25
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Expires: 1996-07-16
Abstract
Abstract An elastomeric seal suitable for use in sealing non-circular cylinders of hydraulic presses against loss of the working fluid. This seal is an elastomeric (e.g. rubber) seal having a generally L-shaped cross section. One portion of the seal functions as a support portion and includes longitudinally extending ribs along its inner face for engaging in a sealed relationship with a supporting structure. The other portion of the seal acts as a wiping portion in engagement with the moving cylinder. The wiping and support portions come together in a generally perpendicular relationship to form a rounded nose where their outer faces meet and a reinforcing fabric is formed into the seal along its outer surface and extending across the nose of the seal.
Inventors
- 👤 Alfred J. Withoff
- 👤 David C. Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:06
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; B; B30; B30B; B30B15/00; B30B15/0052; Y; Y10; Y10S; Y10S425/00; Y10S425/047
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
An elastomeric seal having a generally L-shaped cross section including a support portion and a wiping portion; said support portion having a series of longitudinally spaced perforations for receiving means for clamping said seal in an operating position; said support portion further having longitudinally extending ribs along its inner face embracing said perforations for engaging in a sealed relationship with a supporting structure; said wiping portion and said support portion coming together in a generally perpendicular relationship to form a rounded nose where their outer faces meet; and a reinforcing fabric formed into said seal along its outer surface and extending across the nose of the seal.
Claim 2
Dependent Claim
107 words
An elastomeric seal having a generally L-shaped cross section including a support portion and a wiping portion; said support portion having a series of longitudinally spaced perforations for receiving means for clamping said seal in an operating position; said support portion further having longitudinally extending ribs along its inner face embracing said perforations for engaging in a sealed relationship with a supporting structure; said wiping portion and said support portion coming together in a generally perpendicular relationship to form a rounded nose where their outer faces meet; and a reinforcing fabric formed into said seal along its outer surface and extending across the nose of the seal.
Claim 3
Dependent Claim
32 words
Seals of claim 1 in which the reinforcing fabric extends over at least 50 percent of the total area of the outer faces of the support and wiping portions of said seal.
Claim 4
Dependent Claim
18 words
Seals of claim 2 in which the fabric is nylon and the seal is made of tire rubber.
Claim 5
Dependent Claim
31 words
Seals of claim 3 in which the seals are generally rectangular in shape with at least one of the sides of the rectangle being at least about 8 feet in length.
Claim 6
Dependent Claim
133 words
A hydraulic molding press having a non-circular cylinder or ram powered by a working fluid under pressure, said cylinder being sealed against loss of working fluid with an elastomeric seal having a generally L-shaped cross-section including a support portion and a wiping portion; said support portion having a series of longitudinally spaced perforations for receiving means for clamping said seal in an operation position; said support portion further having longitudinally extending ribs along its inner face embracing said perforations for engaging in a sealed relationship with a supporting structure; said wiping portion and said support portion coming together in a generally perpendicular relationship to form a rounded nose where their outer faces meet; and a reinforcing fabric formed into said seal along its outer surface and extending across the nose of the seal.
Claim 7
Dependent Claim
133 words
A hydraulic molding press having a non-circular cylinder or ram powered by a working fluid under pressure, said cylinder being sealed against loss of working fluid with an elastomeric seal having a generally L-shaped cross-section including a support portion and a wiping portion; said support portion having a series of longitudinally spaced perforations for receiving means for clamping said seal in an operation position; said support portion further having longitudinally extending ribs along its inner face embracing said perforations for engaging in a sealed relationship with a supporting structure; said wiping portion and said support portion coming together in a generally perpendicular relationship to form a rounded nose where their outer faces meet; and a reinforcing fabric formed into said seal along its outer surface and extending across the nose of the seal.
Claim 8
Dependent Claim
159 words
A hydraulic molding press having a non-circular cylinder or ram powered by a working fluid under pressure, said cylinder being sealed against loss of working fluid with an elastomeric seal having a generally L-shaped cross section including a support portion and a wiping portion; said support portion having a series of longitudinally spaced perforations for receiving means for clamping said seal in an operating position; said support portion further having longitudinally extending ribs along its inner face embracing said perforations for engaging in a sealed relationship with a supporting structure; said wiping portion and said support portion coming together in a generally perpendicular relationship to form a rounded nose where their outer faces meet; and a reinforcing fabric formed into said seal along its outer surface and extending across the nose of the seal; said seal being generally rectangular in shape with at least one of the sides of the rectangle being at least about 8 feet in length.
Claim 9
Dependent Claim
159 words
A hydraulic molding press having a non-circular cylinder or ram powered by a working fluid under pressure, said cylinder being sealed against loss of working fluid with an elastomeric seal having a generally L-shaped cross section including a support portion and a wiping portion; said support portion having a series of longitudinally spaced perforations for receiving means for clamping said seal in an operating position; said support portion further having longitudinally extending ribs along its inner face embracing said perforations for engaging in a sealed relationship with a supporting structure; said wiping portion and said support portion coming together in a generally perpendicular relationship to form a rounded nose where their outer faces meet; and a reinforcing fabric formed into said seal along its outer surface and extending across the nose of the seal; said seal being generally rectangular in shape with at least one of the sides of the rectangle being at least about 8 feet in length.
Claim 10
Dependent Claim
15 words
Presses of claim 6 in which the working fluid is water, with or without additives.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |