Pumps – Diverse pumps
Patent
1995-02-03
1996-03-26
Bertsch, Richard A.
Pumps
Diverse pumps
417206, F04B 2310
Patent
active
055015786
ABSTRACT:
A hydrostatic pump of the axial piston type having a significantly reduced overall length due to a special three point bearing arrangement for the main shaft (1) of the pump and the charge pump shaft (12). The improvement comprises a bearing assembly which consists of just three bearings (6, 14, 23) at separate locations for simultaneously supporting the coupled main shaft (1) and charge pump shaft (12). A first bearing 6 is located at the end of the main shaft (1) which is opposite that coupled to the charge pump shaft (12), a second bearing (14) is located at the end of the charge pump shaft (12) which is opposite to that coupled to the main shaft (1), and a third bearing (23) is located at the junction of the coupled shafts (1,12) to provide for their common support. The third bearing (23) can be a needle bearing or of the plain bushing type. The shafts (1,12) can be coupled by mating splines (17,22) and engage each other in a clearance fit (21).
REFERENCES:
patent: 2604047 (1952-07-01), Beaman et al.
patent: 2715875 (1955-08-01), Towler et al.
patent: 3213616 (1965-10-01), Reinke
patent: 3698286 (1972-10-01), Ellis et al.
patent: 4014628 (1977-03-01), Ruseff et al.
Bertsch Richard A.
McAndrews, Jr. Roland G.
Sauer Inc.
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