US3958454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable testing apparatus for testing of fluid-operated brake systems
Assignee: Flughafen Frankfurt am Main AG
•
Filing: 1975-06-09
•
Granted: 1976-05-25
•
Expires: 1995-06-09
Abstract
Abstract A housing of the apparatus has a device for connection to a source of pressurized air, and is provided with first and second connectors for connection to brake system lines. A compressed air tank is located in the housing, and at least three double manometers are provided. Fluid couplings are connected with the manometers. A first fluid line connects the air tank with the device and has a one-way valve and an adjustable pressure regulator interposed in it, a second fluid line connects the air tank with the first connector, and a third fluid line connects the air tank with the second connector and has a one-way valve interposed in it. A multi-position manually operable air spring regulating valve is interposed in the second line and has a valve body, an operating handle for moving the valve body between two operative end positions and a centering-spring arrangement for centering the handle in a rest position in which the valve body is in an intermediate blocking position. A control arrangement is connected in circuit with the air spring valve and connects the air spring and the first connector. This control arrangement includes a one-way valve and a blocking valve intermediate the air tank and the first connector and another blocking valve intermediate the air tank and the second connector.
Inventors
- 👤 Gerhard Rasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:57
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
233 words
In a portable testing apparatus for testing of fluid-operated brake systems, particularly brake systems of land vehicles, a combination comprising a housing having a device for connection to a source of pressurized air; first and second connectors in said housing for connection to brake system lines; a compressed air tank in said housing; at least three double manometers on said housing; fluid couplings provided on said housing and connected with said manometers; a first fluid line connecting said air tank with said device and having a one-way valve and an adjustable pressure regulator interposed in it; a second fluid line connecting said air tank with said first connector; a third fluid line connecting said air tank with said second connector and having a one-way valve interposed in it; a multi-position manually operable air spring regulating valve interposed in said second line and having a valve body, an operating handle for moving said valve body between two operative end positions, and a centering-spring arrangement for centering said handle in a first position in which said valve body is in an intermediate blocking position; and a control arrangement in circuit with said air spring valve and connected with said air tank and first connector, said control arrangement including a one-way valve and a blocking valve intermediate said air tank and said first connector and another blocking valve intermediate said air tank and said second connector.
Claim 2
Dependent Claim
233 words
In a portable testing apparatus for testing of fluid-operated brake systems, particularly brake systems of land vehicles, a combination comprising a housing having a device for connection to a source of pressurized air; first and second connectors in said housing for connection to brake system lines; a compressed air tank in said housing; at least three double manometers on said housing; fluid couplings provided on said housing and connected with said manometers; a first fluid line connecting said air tank with said device and having a one-way valve and an adjustable pressure regulator interposed in it; a second fluid line connecting said air tank with said first connector; a third fluid line connecting said air tank with said second connector and having a one-way valve interposed in it; a multi-position manually operable air spring regulating valve interposed in said second line and having a valve body, an operating handle for moving said valve body between two operative end positions, and a centering-spring arrangement for centering said handle in a first position in which said valve body is in an intermediate blocking position; and a control arrangement in circuit with said air spring valve and connected with said air tank and first connector, said control arrangement including a one-way valve and a blocking valve intermediate said air tank and said first connector and another blocking valve intermediate said air tank and said second connector.
Claim 3
Dependent Claim
30 words
A combination as defined in claim 1, wherein said first connector is a coupling head with a built-in valve, and said second connector is a coupling head without a valve.
Claim 4
Dependent Claim
90 words
A combination as defined in claim 1, wherein said centering spring arrangement comprising a block rigidly connected to said housing, a member having one end portion connected to said handle and another bifurcated end portion embracing said block and being pivoted thereto for pivotal movement in a plane, and a pair of spring biased pressure plates which are in flush engagement with two surfaces of said block and two surfaces of said other end portion that extend normal to said plane, when said handle is centered in said rest position.
Claim 5
Dependent Claim
46 words
A combination as defined in claim 3, said other bifurcated end portion having two arms which define with one another two slots at opposite sides of said block; and wherein said pressure plates are each formed with a nose which projects into one of said slots.
Claim 6
Dependent Claim
58 words
A combination as defined in claim 3, said pressure plates each having a hole in which a bolt is mounted so as to have its opposite end section project outwardly beyond the respective pressure plates, and wherein said arrangement includes two centering springs each guided by one of said end sections and bearing against the associated pressure plate.
Claim 7
Dependent Claim
26 words
A combination as defined in claim 5, wherein said bolt has a center section; and further comprising a sleeve surrounding said center section of said bolt.
Claim 8
Dependent Claim
36 words
A combination as defined in claim 3, said block having an end face directed towards said bifurcated other end portion and bounded by two rounded edges which extend normal to the pivot axis of said member.
Claim 9
Dependent Claim
32 words
A combination as defined in claim 3; further comprising a bifurcated element connected to said handle, and a connecting member connecting said bifurcated element with said one end portion of said member.
References Cited (Backward Citations)
US3312104A
Cited
US3772914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |