초록 ▼

A seal for hydraulic assemblies operating at high temperatures having adaptations (19, 20, 49, 50) for low pressures sealing and configured to move across the gap to be sealed at higher pressures with an angled base on a slope (23, 44) or a cup shape (73, 74) nested into a groove (72). The seal at t

A seal for hydraulic assemblies operating at high temperatures having adaptations (19, 20, 49, 50) for low pressures sealing and configured to move across the gap to be sealed at higher pressures with an angled base on a slope (23, 44) or a cup shape (73, 74) nested into a groove (72). The seal at the point of the gap being an elastic, metallic material.

대표청구항 ▼

1. A seal for an hydraulic assembly for operation in a high temperature and/or pressure environment, wherein hydraulic fluid is to be contained under pressure in a working chamber formed between at least two parts of the assembly, against flow into a gap between said two parts, wherein said gap is d

1. A seal for an hydraulic assembly for operation in a high temperature and/or pressure environment, wherein hydraulic fluid is to be contained under pressure in a working chamber formed between at least two parts of the assembly, against flow into a gap between said two parts, wherein said gap is defined between a first surface on one of said two parts and a second substantially parallel surface on a second of said two parts, said second part having a sloping surface extending away from said second surface to a third surface substantially parallel to the first and second surfaces, characterized in that:the seal has a primary sealing mode wherein seal components are adapted to be in contact with said two parts of the assembly, operative to contain hydraulic fluid to a first pressure level; and a secondary sealing mode, established by elastic deformation of the seal at a pressure beyond said first pressure level, wherein the seal is adapted to closely associate with the gap, a portion of the seal being constructed of metal, and that portion being adapted to closely associate with the gap; wherein said seal comprises a seal body having outwardly projecting sealing flanges thereon that are adapted to contact respective first and third surfaces to effect a seal therewith in said primary scaling mode; and said seal body is adapted to elastically deform to slide along said sloping surface toward said first surface to effect the secondary sealing mode.