US3913394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing of aircraft equipment
Assignee: Vereinigte Flugtechnische Werke Fokker GmbH
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Filing: 1974-05-09
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Granted: 1975-10-21
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Expires: 1994-05-09
Abstract
Abstract A test stand is provided with multiple flanges for connection to individual pieces of auxiliary aircraft equipment of the driving or driven variety, outside of the aircraft, preferably right before installation therein. The test stand includes additionally a gear train with shafts for connection to the equipment to be tested as well as to a test drive motor, a blower for cooling air, and a hydraulic pump or compressor. The shaft to the test drive motor is used as pick up for speed and torque during the test. One of the shafts is disconnectible from the train by a clutch and is connected to a fly-wheel and/or brake. Rotary power generating equipment such as a gas turbine, hydraulic motor and/or air turbine are tested by using either the fly wheel and/or brake as a load or by controlling an electric test drive motor as generator.
Inventors
- 👤 Horst Niehaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
G; G01; G01M; G01M15/00; B; B64; B64D; B64D41/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
138 words
Equipment for testing secondary power generation machines and other auxiliary equipment, comprising: a base; an electric drive motor mounted on the base; circuit means connected to run the motor at a controlled speed or as electric power producing load, the circuit means being further constructed to simulate starting of an aircraft engine, operating the motor as drive load with change over to motive power assist motor operation; a distribution gear having a plurality of shafts interconnected for rotation by a gear train; means including a pick up shaft connecting one of the shafts of the plurality to the motor and provided for measuring speed and torque; and a casing for the distribution gear having a plurality of flanges for connection to individual machines and equipment to be tested and to be drivingly connected individually to the said shafts.
Claim 2
Dependent Claim
138 words
Equipment for testing secondary power generation machines and other auxiliary equipment, comprising: a base; an electric drive motor mounted on the base; circuit means connected to run the motor at a controlled speed or as electric power producing load, the circuit means being further constructed to simulate starting of an aircraft engine, operating the motor as drive load with change over to motive power assist motor operation; a distribution gear having a plurality of shafts interconnected for rotation by a gear train; means including a pick up shaft connecting one of the shafts of the plurality to the motor and provided for measuring speed and torque; and a casing for the distribution gear having a plurality of flanges for connection to individual machines and equipment to be tested and to be drivingly connected individually to the said shafts.
Claim 3
Dependent Claim
26 words
Equipment as in claim 1, including at least one clutch, one of the shafts of the plurality being connected to the gear train by the clutch.
Claim 4
Dependent Claim
14 words
Equipment as in claim 2, said one shaft being connected to a fly wheel.
Claim 5
Dependent Claim
11 words
Equipment as in claim 3, said fly wheel having adjustable mass.
Claim 6
Dependent Claim
25 words
Equipment as in claim 3, another one of the shafts of the plurality being connected to a blower to provide cooling air during a test.
Claim 7
Dependent Claim
13 words
Equipment as in claim 2, said one shaft being connected to a brake.
Claim 8
Dependent Claim
139 words
Equipment for testing secondary power generating machines ands other auxiliary equipment of an aircraft, but to be tested outside of the aircraft, comprising: a casing having a plurality of connector flanges placed side by side; a base supporting the casing and having a mounting area in front of the flanges for mounting pieces of equipment to be tested for connection to the testing; a plurality of parallelly operating shafts in the casing terminating in the flanges; a gear train in the casing and drivingly interconnecting the shafts of the plurality; a drive motor on the base and drivingly connected to the gear train; means measuring the torque and speed of the drive motor where connected to the train; and means on the base connected to the train and being driven therefrom for furnishing pressurized fluid for conduction of tests.
Claim 9
Dependent Claim
139 words
Equipment for testing secondary power generating machines ands other auxiliary equipment of an aircraft, but to be tested outside of the aircraft, comprising: a casing having a plurality of connector flanges placed side by side; a base supporting the casing and having a mounting area in front of the flanges for mounting pieces of equipment to be tested for connection to the testing; a plurality of parallelly operating shafts in the casing terminating in the flanges; a gear train in the casing and drivingly interconnecting the shafts of the plurality; a drive motor on the base and drivingly connected to the gear train; means measuring the torque and speed of the drive motor where connected to the train; and means on the base connected to the train and being driven therefrom for furnishing pressurized fluid for conduction of tests.
Claim 10
Dependent Claim
24 words
Equipment as in claim 7, wherein the last mentioned means is a compressor to bE connected to an air turbine when connected for testing.
Claim 11
Dependent Claim
27 words
Equipment as in claim 7, wherein the last mentioned means is a pump for hydraulic fluid to be connected to a hydraulic motor when connected for testing.
Claim 12
Dependent Claim
16 words
Equipment as in claim 7, wherein the fluid device is a blower for providing cooling air.
Claim 13
Dependent Claim
38 words
Equipment as in claim 7, including a clutch for selectively connecting one of the shafts to the gear train; and a fly wheel and/or brake connected to said one shaft on the other side of the mounting area.
Claim 14
Dependent Claim
25 words
Equipment as in claim 7, wherein the last means is a compressor disposed on the base and on the other side of the mounting area.
Claim 15
Dependent Claim
13 words
Equipment as in claim 7, wherein the last means is a hydraulic pump.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |