US3598208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid brake dynamometer
Assignee: Avco Corp
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Filing: 1969-06-25
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Granted: 1971-08-10
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Expires: 1989-06-25
Abstract
Abstract The disclosure illustrates a liquid brake dynamometer having a rotor comprising a series of spaced perforated disks journaled in a chamber. Water is passed through the chamber at a given rate set by flow control valves so that the resistance to rotation of the rotor is primarily a function of the water flow. Air at a predetermined pressure level is injected into the housing to eliminate cavitation. The pressure of the injected air is adjustable to provide a vernier effect on the dynamometer''s power absorption.
Inventors
- 👤 Joachim C Bronder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:04
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/16; G01L3/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
In combination: an elongated generally cylindrical housing; an elongated rotatable element positioned in said housing and comprising a series of perforated axially spaced disks mounted on a shaft for rotation in said housing; a plurality of perforated stator disks supported by said housings in between adjacent rotatable disks; means for maintaining a flow of liquid through said housing thereby to resist the rotation of said disks, said flowmaintaining means including a flow path having an inlet to said elongated housing at one end of the disks near their center of rotation and an outlet at the other end of the stacked disks away from their center of rotation whereby the liquid passes generally axially and radially outward through the stator and rotating disks; means for injecting gas into the inlet end of said housing; and passageway means carried by said elongated rotatable element providing a flow path for gas from said inlet end of said housing to a plurality of locations along said rotatable element.
Claim 2
Dependent Claim
165 words
In combination: an elongated generally cylindrical housing; an elongated rotatable element positioned in said housing and comprising a series of perforated axially spaced disks mounted on a shaft for rotation in said housing; a plurality of perforated stator disks supported by said housings in between adjacent rotatable disks; means for maintaining a flow of liquid through said housing thereby to resist the rotation of said disks, said flowmaintaining means including a flow path having an inlet to said elongated housing at one end of the disks near their center of rotation and an outlet at the other end of the stacked disks away from their center of rotation whereby the liquid passes generally axially and radially outward through the stator and rotating disks; means for injecting gas into the inlet end of said housing; and passageway means carried by said elongated rotatable element providing a flow path for gas from said inlet end of said housing to a plurality of locations along said rotatable element.
Claim 3
Dependent Claim
78 words
Apparatus as in claim 1 wherein said gas is injected adjacent the center of rotation of said disks and said passageway means comprises: means for forming a longitudinal passageway extending through each of the rotatable disks near their center of rotation; and means for forming a plurality of radial passageways extending from said longitudinal passageway to connect said longitudinal passageway with the stator disks between adjacent rotatable disks whereby pressurized gas is uniformly distributed between adjacent rotatable disks.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |