Patent CA1074665A successfully refreshed from Google Patents.
CA1074665A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Centrifugal replenishing pump for a hydrostatic pump-motor system
Assignee: Caterpillar Inc
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Filing: 1978-02-23
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Granted: 1980-04-01
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Expires: 1998-02-23
Abstract
Abstract CEMTRIFUGAL REPLENISHING PUMP FOR A HYDROSTATIC PUMP-MOTOR SYSTEM Abstract of the Disclosure In a radial piston pump-radial piston motor drive system, a centrifugal replenishing pump is provided integral with the pump driving means. The radial-piston pump, radial piston motor, centrifugal replenishing pump, and most of the fluid circuit, including fluid sump are all contained within a unitary housing to provide a compact self-contained pump-motor hydrostatic unit.
Inventors
- 👤 William K. Engel
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-04 09:34
CPC Classifications
F; F04; F04B; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/103; F04B23/14; F16; F16H; F16H39/00; F16H39/04; F16H39/06; F16H39/08; F16H39/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A hydrostatic pump-motor system including a housing enclosing a hydrostatic pump having a rotor with an input shaft connected thereto; a hydrostatic motor driven by hydraulic fluid forced from the pump; and a centrifugal pump formed at least partly integrally with the rotor and mounted internally of the housing in driven connection with the input shaft, wherein passageways within the housing communicate output hydraulic fluid from the centrifugal pump to fluid in-lets for the hydrostatic pump.
Claim 2
Dependent Claim
76 words
A hydrostatic pump-motor system including a housing enclosing a hydrostatic pump having a rotor with an input shaft connected thereto; a hydrostatic motor driven by hydraulic fluid forced from the pump; and a centrifugal pump formed at least partly integrally with the rotor and mounted internally of the housing in driven connection with the input shaft, wherein passageways within the housing communicate output hydraulic fluid from the centrifugal pump to fluid in-lets for the hydrostatic pump.
Claim 3
Dependent Claim
18 words
A system according to claim 1, wherein pressure-sensitive valves regulate the flow of hydraulic fluid through the passageways.
Claim 4
Dependent Claim
44 words
A system according to claim 1, wherein passage-ways communicate hydraulic fluid from the centrifugal pump through pump and motor and thence to a filter and from thence to a sump chamber of the system, to provide continuous filtra-tion of hydraulic fluid within the system.
Claim 5
Independent Claim
31 words
A system according to any one of claims 1, 2, or 3, wherein passageways are provided to communicate pressurized fluid from the centrifugal pump to bearing surfaces of the hydrostatic motor.
Claim 6
Independent Claim
23 words
A system according to any one of claims 1, 2, or 3, wherein fluid output from the centrifugal pump lubricates the hydrostatic pump.
Claim 7
Independent Claim
37 words
A system according to any one of claims 1, 2, or 3, wherein the centrifugal pump comprises an first stage includ-ing bladed impeller means and a second comprising passages de-fined by hydrostatic pump cylinders of the pump.
References Cited (Backward Citations)
No citation records indexed.
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