Patent US3585855A successfully refreshed from Google Patents.
US3585855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle engine testing apparatus
Assignee: Individual
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Filing: 1969-04-28
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Granted: 1971-06-22
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Expires: 1989-04-28
Abstract
Abstract A portable power-testing apparatus for small engine-driven vehicles, having treadmill means for supporting engagement with vehicle-driving wheels or drive tracks, and a fluid pump driven by the treadmill means to provide a test load. A tachometer is connected to the treadmill means to register apparent vehicle speeds, and a valve is operative to regulate the flow of fluid delivered by the pump.
Inventors
- 👤 Robert V Albertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:54
CPC Classifications
G; G01; G01M; G01M15/00; G01M15/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
215 words
Portable vehicle engine testing apparatus comprising: a. a frame structure; b. a plurality of generally horizontally disposed parallel shafts extending transversely of and journaled in said frame structure; c. a plurality of pneumatiC tire equipped wheels mounted on each of said shafts in closely spaced side-by-side relationship for common rotation with their respective shafts; d. means positively connecting all of said shafts together for common rotation of all of said wheels; e. said wheels being disposed to at least partially support the weight of a vehicle to be tested, said shafts being disposed to have the wheels of at least two of said shafts in supporting and running contact with the ground-engaging drive mechanism of the vehicle to be tested and to be driven by said drive mechanism; f. a fluid circuit including a pump operatively connected to said wheels to be driven by a vehicle on the wheels, control valve means for varying the pressure of fluid delivered by the pump whereby to vary the load imposed upon the vehicle drive means by said wheels, and fluid pressure indicator mounted on said frame structure and connected in said circuit; g. and a tachometer on said frame structure operatively connected to said wheels to register the apparent speed of a vehicle when driving said wheels.
Claim 2
Dependent Claim
215 words
Portable vehicle engine testing apparatus comprising: a. a frame structure; b. a plurality of generally horizontally disposed parallel shafts extending transversely of and journaled in said frame structure; c. a plurality of pneumatiC tire equipped wheels mounted on each of said shafts in closely spaced side-by-side relationship for common rotation with their respective shafts; d. means positively connecting all of said shafts together for common rotation of all of said wheels; e. said wheels being disposed to at least partially support the weight of a vehicle to be tested, said shafts being disposed to have the wheels of at least two of said shafts in supporting and running contact with the ground-engaging drive mechanism of the vehicle to be tested and to be driven by said drive mechanism; f. a fluid circuit including a pump operatively connected to said wheels to be driven by a vehicle on the wheels, control valve means for varying the pressure of fluid delivered by the pump whereby to vary the load imposed upon the vehicle drive means by said wheels, and fluid pressure indicator mounted on said frame structure and connected in said circuit; g. and a tachometer on said frame structure operatively connected to said wheels to register the apparent speed of a vehicle when driving said wheels.
Claim 3
Dependent Claim
62 words
The engine-testing apparatus defined in claim 1 in which said wheels have lower portions projecting downwardly from said frame structure, characterized by vertically adjustable legs mounted on said frame structure for movements between operative positions, wherein said lower wheel portions are upwardly spaced from the ground, and raised inoperative positions, wherein said lower wheel portions engage the ground for rolling movement thereover.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |