Transmissionless variable output pumping unit

Details Transmissionless variable output pumping unit Transmissionless variable output pumping unit

2005-12-20

2005-12-20

Rodriguez, William H. (Department: 3746)

Pumps

Expansible chamber type

Plural pumping members in single pump chamber

C417S053000, C092S06900R

Reexamination Certificate

active

06976831

ABSTRACT:
A transmissionless variable output pumping unit comprising a multiple crankshaft pump driven by a prime mover. The apparatus includes an adjustment mechanism for adjusting a phase angle between first and second crankshafts. Plungers in the pump are disposed in cylinders forming part of a pumping chamber. When the phase angle is at a minimum, the plungers operate together for maximum discharge from the pump. When the phase angle is at a maximum, the plungers operate substantially opposite one another for zero discharge. The phase angle may be infinitely adjusted between the minimum and maximum.

REFERENCES:
patent: 4029289 (1977-06-01), Miffre
patent: 4112826 (1978-09-01), Cataldo
patent: 4989469 (1991-02-01), Eslinger
patent: 5073096 (1991-12-01), King et al.
patent: 5127807 (1992-07-01), Eslinger
patent: 5299921 (1994-04-01), Richter
patent: 5362215 (1994-11-01), King
patent: 5382057 (1995-01-01), Richter
patent: 2003/0072658 (2003-04-01), Park et al.
patent: 2 099 519 (1982-12-01), None
Displacement Pump Definitions, pp. 261 and 262; undated but admitted to be prior art.
BarDyne Inc., Stillwater, OK, “Hydraulic System Design for Servie Assurance,” pp. 248-259 (1999).

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