Press seal
AssigneeBlandin Wood Products
InventorsAlfred J. Withoff, David C. Schultz
Life of this patent
Estimating the term…
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.
Claims7
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.
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.
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.
Dependencies are inferred from the claim text.