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US 2010/0140376 A1Published application
Rotating fluid jet with improved rotary seal
AssigneeNLB Corp.
InventorsDaniel D. Trunick, Matthew O. Herhold
Life of this patent
Estimating the term…
Abstract
An improved seal for use in fluid systems such as a water jet system includes an outer seal point that is very close to an inner seal point. By spacing these two seal points very close together, the force on the seal is greatly reduced compared to the prior art. In the disclosed embodiment, the outer seal point is on an angled forward face of the seal that abuts a back-up ring angled face. The inner seal point is between the seal and an internal shaft which rotates relative to a housing.
Claims14
A fluid delivery system comprising:
- a housing;
- a nozzle;
- one of said housing and said nozzle including a shaft extending into a cavity, said nozzle rotating relative to said housing;
- a structure defining an end face of said cavity, and said shaft extending through a bore in said structure and into said opening;
- and
- a seal received between an outer surface of said shaft and an inner surface of said cavity, said seal having a forward face abutting said structure to provide an outer seal point between said seal and said structure, and said seal further sealing on an outer peripheral surface of said shaft.
3 more elements
A seal comprising:
- a seal body to be received between an outer surface of a shaft and an inner surface of a housing, said seal having a forward face for abutting the structure to provide an outer seal point between said seal and the structure, and said seal further creating an inner seal point for sealing on an outer peripheral surface of the shaft.
A back-up ring and seal combination for a rotating fluid nozzle comprising:
- a back-up ring having a forwardly extending face with an angled innermost surface to mate with a surface of a seal;
- said back-up ring having an flange and an outer surface extending radially outwardly of said forwardly extending seal;
- and
- a seal body to be received between an outer surface of a shaft and an inner surface of a housing, said seal having a forward face for abutting the back-up ring to provide an outer seal point between said seal and the back-up ring, and said seal further creating an inner seal point for sealing on an outer peripheral surface of the shaft.
1 more element
Dependencies are inferred from the claim text.