Patent US2055889A successfully refreshed from Google Patents.
Patent US3581836A successfully refreshed from Google Patents.
US3581836A
Expired / Lapsed
US
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Method for reducing frictional errors in determining the weight of an object supported by a pneumatic or hydraulic device
Assignee: Fairchild Semiconductor Corp
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Filing: 1969-12-02
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Granted: 1971-06-01
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Expires: 1989-12-02
Abstract
Abstract A device supporting an object has its internal pressure successively increased and decreased to determine the change in pressure experienced between the steady-state pressure required to raise the object and that required to merely support the object. The lower steady-state pressure plus one-half the difference in pressure between the higher and lower steady-state pressures is then representative of the actual weight supported by the device.
Inventors
- 👤 Roy R Segerdahl
- 👤 Sandford I Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:09
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/02; G01G19/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A method for reducing frictional errors in determining the weight of an object supported by a pneumatic or hydraulic device or a combination thereof which comprises: increasing the pressure within the device until a higher steadystate pressure is obtained; decreasing the pressure within the device until a lower steadystate pressure is obtained; determining the difference between the higher and lower steadystate pressures; and adding one-half the pressure difference to the lower steadystate pressure.
Claim 2
Independent Claim
73 words
A method for reducing frictional errors in determining the weight of an object supported by a pneumatic or hydraulic device or a combination thereof which comprises: increasing the pressure within the device until a higher steadystate pressure is obtained; decreasing the pressure within the device until a lower steadystate pressure is obtained; determining the difference between the higher and lower steadystate pressures; and adding one-half the pressure difference to the lower steadystate pressure.
Claim 3
Independent Claim
72 words
A method for reducing frictional errors in determining the weight of an object supported by a pneumatic or hydraulic device or combination thereof which comprises: increasing the pressure within the device until a higher steady-state pressure is obtained; decreasing the pressure within the device until a lower steady-state pressure is obtained; determining the difference between the upper and lower steady-state pressures; and subtracting one-half the pressure difference from the higher steady-state pressure.
Claim 4
Independent Claim
72 words
A method for reducing frictional errors in determining the weight of an object supported by a pneumatic or hydraulic device or combination thereof which comprises: increasing the pressure within the device until a higher steady-state pressure is obtained; decreasing the pressure within the device until a lower steady-state pressure is obtained; determining the difference between the upper and lower steady-state pressures; and subtracting one-half the pressure difference from the higher steady-state pressure.
Claim 5
Dependent Claim
83 words
For an aircraft supported by a plurality of oleo struts, a method of reducing frictional errors in determining the weight of the aircraft which comprises: increasing the pressure within each of the oleo struts until higher steady-state pressures are obtained; decreasing the pressure within each of the oleo struts until lower steady-state pressures are obtained; determininG the difference between the sums of the higher and lower steady-state pressures; and adding one-half of the pressure difference to the sum of the lower steady-state pressures.
Claim 6
Dependent Claim
83 words
For an aircraft supported by a plurality of oleo struts, a method of reducing frictional errors in determining the weight of the aircraft which comprises: increasing the pressure within each of the oleo struts until higher steady-state pressures are obtained; decreasing the pressure within each of the oleo struts until lower steady-state pressures are obtained; determininG the difference between the sums of the higher and lower steady-state pressures; and adding one-half of the pressure difference to the sum of the lower steady-state pressures.
Claim 7
Dependent Claim
84 words
For an aircraft supported by a plurality of oleo struts, a method of reducing frictional errors in determining the weight of the aircraft which comprises: increasing the pressure within each of the oleo struts until upper steady-state pressures are obtained; decreasing the pressure within each of the oleo struts until lower steady-state pressures are obtained; determining the difference between the sums of the upper and lower steady-state pressures; and subtracting the one-half of the pressure difference from the sum of the higher steady-state pressures.
Claim 8
Dependent Claim
84 words
For an aircraft supported by a plurality of oleo struts, a method of reducing frictional errors in determining the weight of the aircraft which comprises: increasing the pressure within each of the oleo struts until upper steady-state pressures are obtained; decreasing the pressure within each of the oleo struts until lower steady-state pressures are obtained; determining the difference between the sums of the upper and lower steady-state pressures; and subtracting the one-half of the pressure difference from the sum of the higher steady-state pressures.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |