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Patent US4943119A successfully refreshed from Google Patents.
US4943119A
Expired / Lapsed
US
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Height control device and method for a fixture for machining an object essentially defined by a single plane
Assignee: MOBA Mobile Automation GmbH
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Filing: 1988-11-22
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Granted: 1990-07-24
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Expires: 2008-11-22
Abstract
Abstract A height control device for a fixture which comprises at least a pair of gauging devices each having an ultrasonic transceiver for gauging a certain distance. A signal generator is connected to both gauging devices for generating a signal representative of the change in the level height due to machining. A control device is also provided for elevating or lowering the machining fixture.
Inventors
- 👤 Martin Zarniko
- 👤 Willibald Sehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:57
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/08; E01C23/085; E01C23/088; E01C19/00; E01C19/004; E01C19/006; G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/101; G01S15/87; G01S15/88; G01S7/00; G01S7/52; G01S7/52004; G01S7/52006
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A height control device for a fixture for machining an object essentially defined by a single plane by means of a machining tool for changing the level height of the plane, in particularly for a milling fixture for stripping road surfacing comprising: a first gauging device featuring a first ultrasonic transceiver for gauging the distance from the ultrasonic transceiver to the unmachined plane of the object, a second gauging device featuring a second ultrasonic transceiver for gauging the distance from the second ultrasonic transceiver to the machined plane, a signal generator connected to both gauging devices for generating a first signal representing the change in the level height due to machining from the quotient or difference of the distances measured by said first and second gauging devices, and a control device for elevating or lowering the machining fixture so that the signal representing the change in the level height due to machining essentially corresponds to a setpoint value for changing the level height due to machining.
Claim 2
Dependent Claim
166 words
A height control device for a fixture for machining an object essentially defined by a single plane by means of a machining tool for changing the level height of the plane, in particularly for a milling fixture for stripping road surfacing comprising: a first gauging device featuring a first ultrasonic transceiver for gauging the distance from the ultrasonic transceiver to the unmachined plane of the object, a second gauging device featuring a second ultrasonic transceiver for gauging the distance from the second ultrasonic transceiver to the machined plane, a signal generator connected to both gauging devices for generating a first signal representing the change in the level height due to machining from the quotient or difference of the distances measured by said first and second gauging devices, and a control device for elevating or lowering the machining fixture so that the signal representing the change in the level height due to machining essentially corresponds to a setpoint value for changing the level height due to machining.
Claim 3
Dependent Claim
63 words
A height control device as claimed in claim 1, wherein a third gauging device featuring a third ultrasonic transceiver for gauging the distance from the third ultransonic transceiver to the unmachined plane of the object is provided, and in which said first and third gauging devices are spaced from each other in a direction perpendicular to the machining direction of the machining device.
Claim 4
Dependent Claim
49 words
A height control device as claimed in claim 2, wherein said signal generator is also connected to said third gauging device to generate a second signal representing the change in the level height from the quotient or difference of the distances measured by said second and third gauging devices.
Claim 5
Dependent Claim
50 words
A height control device as claimed in claim 3, wherein said control device compares both the first and second signal representing the change in the level height due to machining to a setpoint value for the change in the level height and generates a first and a second reference signal.
Claim 6
Dependent Claim
44 words
A height control device as claimed in claim 4, wherein said control device signals separate, electrically operated first and second hydraulic valves by means of said first and second reference signals and in which hydraulic actuators are height-adjusted by means of said hydraulic valves.
Claim 7
Independent Claim
177 words
A method for providing a height control device for a fixture for machining an object essentially defired by a single plane by means of a machining tool for changing the level height of the plane, in particularly for a milling fixture for stripping road surfacing comprising the steps of: providing a first gauging device featuring a first ultrasonic transceiver for gauging the distance from the ultrasonic transceiver to the unmachined plane of the object; providing a second gauging device featuring a second ultrasonic transceiver for gauging the distance from the second ultrasonic transceiver to the machined plane; providing a signal generator connected to both gauging devices for generating a first signal representing the change in the level height due to machining from the quotient or difference of the distances measured by said first and second gauging devices; and providing a control device for elevating or lowering the machining fixture so that the signal representing the change in the level height due to machining essentially corresponds to a setpoint value for changing the level height due to machining.
Claim 8
Independent Claim
177 words
A method for providing a height control device for a fixture for machining an object essentially defired by a single plane by means of a machining tool for changing the level height of the plane, in particularly for a milling fixture for stripping road surfacing comprising the steps of: providing a first gauging device featuring a first ultrasonic transceiver for gauging the distance from the ultrasonic transceiver to the unmachined plane of the object; providing a second gauging device featuring a second ultrasonic transceiver for gauging the distance from the second ultrasonic transceiver to the machined plane; providing a signal generator connected to both gauging devices for generating a first signal representing the change in the level height due to machining from the quotient or difference of the distances measured by said first and second gauging devices; and providing a control device for elevating or lowering the machining fixture so that the signal representing the change in the level height due to machining essentially corresponds to a setpoint value for changing the level height due to machining.
Claim 9
Dependent Claim
57 words
The method as claimed in claim 6 including providing a third gauging device featuring a third ultrasonic transceiver for gauging the distance from the third ultrasonic transceiver to the unmachined plane of the object, said first and third gauging devices are spaced from each other in a direction perpendicular to the machining direction of the machining device.
Claim 10
Dependent Claim
47 words
The method as claimed in claim 7 wherein said signal generator is also connected to said third gauging device to generate a second signal representing the change in the level height from the quotient or difference of the distances measured by said second and third gauging devices.
Claim 11
Dependent Claim
53 words
The method as claimed in claim 8 including the step of using said control device to compare both the first and second signal representing the change in the level height due to machining to a setpoint value for the change in the level height and to generate a first and second reference signal.
Claim 12
Dependent Claim
42 words
The method as claimed in claim 9 wherein said control device signals separate, electrically operated first and second hydraulic valves by means of said first and second reference signals and in which hydraulic actuators are height-adjusted by means of said hydraulic valves.
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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |