Back to results
US 8,801,410 B2Granted
Coupling shaft for gear pump
AssigneeHamilton Sundstrand Corporation
InventorsSatish Shantilal Shah, Timothy P. Walgren
Life of this patent
Estimating the term…
Abstract
A coupling shaft assembly includes a coupling shaft with a first radial shoulder and a second radial shoulder, the first radial shoulder and the second radial shoulder each include at least one slot to provide a lubricant flow path.
Claims18
A gear pump comprising:
- a housing;
- an input shaft which at least partially extends from said housing and rotatable about an input shaft axis, said input shaft defines a first input shaft radial shoulder and a second input shaft radial shoulder;
- and
- a coupling shaft rotatable about a coupling shaft axis parallel to said input shaft axis, said coupling shaft defines a first coupling shaft radial shoulder and a second coupling shaft radial shoulder, said first coupling shaft radial shoulder and said second coupling shaft radial shoulder each include at least one slot that opens, respectively, at opposed axial sides of the first coupling shaft radial shoulder and opposed axial sides of the second coupling shaft radial shoulder.
1 more element
A gear pump comprising:
- a housing;
- an input shaft which at least partially extends from said housing along an input shaft axis, said input shaft defines a first input shaft radial shoulder and a second input shaft radial shoulder;
- and
- a coupling shaft along a coupling shaft axis parallel to said input shaft axis, said coupling shaft defines a first coupling shaft radial shoulder and a second coupling shaft radial shoulder, said first coupling shaft radial shoulder and said second coupling shaft radial shoulder each include at least one slot, wherein said at least one slot includes four slots each equally displaced about a periphery of said first coupling shaft radial shoulder and said second coupling shaft radial shoulder, wherein said input shaft and said coupling shaft extend in said housing, with a drive gear mounted on said input shaft and a driven gear mounted on said coupling shaft in meshed engagement with said drive gear such that rotation of said input shaft causes rotation of said coupling shaft though said meshed engagement, said drive gear and said driven gear being operable to move a fluid from an inlet to a discharge.
1 more element
A gear pump comprising:
- a housing;
- an input shaft which at least partially extends from said housing along an input shaft axis, said input shaft defines a first input shaft radial shoulder and a second input shaft radial shoulder;
- and
- a coupling shaft along a coupling shaft axis parallel to said input shaft axis, said coupling shaft defines a first coupling shaft radial shoulder and a second coupling shaft radial shoulder, said first coupling shaft radial shoulder and said second coupling shaft radial shoulder each include at least one slot, wherein an axial separation between said first coupling shaft radial shoulder and said second coupling shaft radial shoulder defines an axial distance SA along an axis of rotation, said at least one slot defines a lowermost radial dimension SR from the axis of rotation, a ratio of SR/SA defined between 0.25-0.77, and said at least one slot includes four slots each equally displaced about a periphery of said first coupling shaft radial shoulder and said second coupling shaft radial shoulder, each of said slots defines said lowermost radial dimension SR, wherein said input shaft and said coupling shaft extend in said housing, with a drive gear mounted on said input shaft and a driven gear mounted on said coupling shaft in meshed engagement with said drive gear such that rotation of said input shaft causes rotation of said coupling shaft though said meshed engagement, said drive gear and said driven gear being operable to move a fluid from an inlet to a discharge.
1 more element
A method of installing a shaft within a housing comprising:
- mounting a shaft which is rotatable about a shaft axis into a first gear stage, a lubricant communicatable from the first gear stage along a first splined end section and through a slot in a first radial shoulder of the shaft.
Dependencies are inferred from the claim text.