US3878712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure recordation
Assignee: Individual
•
Filing: 1973-11-05
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Granted: 1975-04-22
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Expires: 1993-11-05
Abstract
Abstract A method and apparatus is described for recording mechanically the pressure applied at differing locations between two surfaces. One described arrangement embodying the invention is for the purpose of determining whether or not an automobile tire is properly inflated. A support plate has a recess in its upper surface between aligned ramps, and a recording slab is positioned within the recess. The recording slab is of a solid foam material which is compressible to a degree proportional to an applied pressure. The pressure of an automobile tire on the recording slab results in the latter being compressed against the bottom of the recess in a manner which is indicative of the inflation of the tire.
Inventors
- 👤 Ned Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:55
CPC Classifications
G; G01; G01L; G01L17/00; G01L17/005
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
132 words
A device for recording within a range of pressures, the pressure exerted by one surface relative to another; said device comprising a reference sheet of material which is generally incompressible when subjected to pressure within said range of pressures, and a recording slab of a material which is compressible to a degree proportional to the applied pressure when it is subjected to pressure within said range of pressures, said slab and reference sheet forming a lamination which is insertable between said two surfaces for compression of said slab against said reference sheet to record said pressure by the degree of said compression, and said recording slab being of a material which is inelastically compressed when subjected to pressure within said range of pressures to thereby retain a record of the applied pressure.
Claim 2
Independent Claim
132 words
A device for recording within a range of pressures, the pressure exerted by one surface relative to another; said device comprising a reference sheet of material which is generally incompressible when subjected to pressure within said range of pressures, and a recording slab of a material which is compressible to a degree proportional to the applied pressure when it is subjected to pressure within said range of pressures, said slab and reference sheet forming a lamination which is insertable between said two surfaces for compression of said slab against said reference sheet to record said pressure by the degree of said compression, and said recording slab being of a material which is inelastically compressed when subjected to pressure within said range of pressures to thereby retain a record of the applied pressure.
Claim 3
Independent Claim
132 words
A device for recording within a range of pressures, the pressure exerted by one surface relative to another; said device comprising a reference sheet of material which is generally incompressible when subjected to pressure within said range of pressures, and a recording slab of a material which is compressible to a degree proportional to the applied pressure when it is subjected to pressure within said range of pressures, said slab and reference sheet forming a lamination which is insertable between said two surfaces for compression of said slab against said reference sheet to record said pressure by the degree of said compression, and said recording slab being of a material which is inelastically compressed when subjected to pressure within said range of pressures to thereby retain a record of the applied pressure.
Claim 4
Independent Claim
132 words
A device for recording within a range of pressures, the pressure exerted by one surface relative to another; said device comprising a reference sheet of material which is generally incompressible when subjected to pressure within said range of pressures, and a recording slab of a material which is compressible to a degree proportional to the applied pressure when it is subjected to pressure within said range of pressures, said slab and reference sheet forming a lamination which is insertable between said two surfaces for compression of said slab against said reference sheet to record said pressure by the degree of said compression, and said recording slab being of a material which is inelastically compressed when subjected to pressure within said range of pressures to thereby retain a record of the applied pressure.
Claim 5
Dependent Claim
61 words
The device of claim 1 for recording pressure wherein the material of said slab is an open celled foam of a solid material with the open cell grain thereof oriented in the direction from which it is expected that pressure will be applied to such material, whereby escape of fluid from the cells of said foam is permitted upon compression thereof.
Claim 6
Dependent Claim
80 words
The device of claim 1 for recording pressures wherein said recording slab has a thickness in the direction from which it is expected that pressure will be applied, which is at least about five times the thickness reduction expected when said recording slab is subjected to the minimum pressure within said range of pressures, and at least about 1 1/3 times the thickness reduction expected when said recording slab is subjected to the maximum pressure within said range of pressures.
Claim 7
Dependent Claim
53 words
The device of claim 3 wherein said recording slab has dimensions in directions transverse to the direction from which it is expected that pressure will be applied which is equal to or greater than the dimensions in such directions of the smaller of the surface areas contacting such slab and applying pressure thereto.
Claim 8
Dependent Claim
17 words
The device of claim 1 for recording pressure further including a support for holding said recording slab.
Claim 9
Dependent Claim
66 words
The device of claim 5 especially adapted to record variations in the applied pressure along the width of a vehicle tire, said support being a plate having a recess in its upper surface for receipt and support of said recording slab, and further including aligned ramps on opposite sides of said recess for travel of a vehicle tire onto and off of the upper surface thereof.
Claim 10
Dependent Claim
88 words
The device of claim 6 wherein said material of said recording slab is a solid cellular foam of a phenolic resin having a density of about 2.2 pounds per square foot with the open cell grain thereof oriented in the direction from which it is expected that pressure from a vehicle tire will be applied thereto, whereby escape of the fluid from the cells of said foam is permitted upon compression thereof so that said foam will be inelastically compressed to retain a record of the applied pressure.
Claim 11
Dependent Claim
35 words
The device of claim 6 for recording pressure wherein said recording slab has a width and length equal to or greater than the smaller of the surface areas contacting such slab and applying pressure thereto.
Claim 12
Dependent Claim
40 words
The device of claim 5 for recording pressure wherein said support includes a receptacle for receiving and supporting said recording slab, and a handle extending from said receptacle for facilitating manipulation of said device into position for recordIng a pressure.
Claim 13
Independent Claim
88 words
A method of recording a pressure within a range of pressures exerted by one surface relative to another comprising the steps of: holding between said surfaces during application of said pressure, a recording slab of a material which is compressible to a degree proportional to an applied pressure within said range of pressures; and measuring the thickness of the compressed portion of said slab after compression thereof by said applied pressure to obtain an indication of the degree of said compression and, hence, the amount of said pressure.
Claim 14
Independent Claim
88 words
A method of recording a pressure within a range of pressures exerted by one surface relative to another comprising the steps of: holding between said surfaces during application of said pressure, a recording slab of a material which is compressible to a degree proportional to an applied pressure within said range of pressures; and measuring the thickness of the compressed portion of said slab after compression thereof by said applied pressure to obtain an indication of the degree of said compression and, hence, the amount of said pressure.
Claim 15
Independent Claim
104 words
A method of recording a pressure within a range of pressures exerted by one surface relative to another comprising the step of holding between said surfaces during application of said pressure, a recording slab of a material which is compressible to a degree proportional to an applied pressure within said range of pressures, said recording slab being an open-celled foam of a solid material, with the open cell grain thereof oriented in the direction from which pressure is applied to said material when it is positioned between said surfaces, whereby escape of fluid from the cells of said foam is permitted upon compression thereo.
Claim 16
Independent Claim
104 words
A method of recording a pressure within a range of pressures exerted by one surface relative to another comprising the step of holding between said surfaces during application of said pressure, a recording slab of a material which is compressible to a degree proportional to an applied pressure within said range of pressures, said recording slab being an open-celled foam of a solid material, with the open cell grain thereof oriented in the direction from which pressure is applied to said material when it is positioned between said surfaces, whereby escape of fluid from the cells of said foam is permitted upon compression thereo.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |