US3906782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isostatic crush strength test system
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1974-02-04
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Granted: 1975-09-23
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Expires: 1994-02-04
Abstract
Abstract An isostatic test system useful for the isostatic testing of frangible structures, such as honeycomb ceramic monolith structures useful as catalyst supports, is provided by a combination of elements including means for providing a pressurized fluid, a rigid container, a pressure-expansible fluid impermeable means for receiving the pressurized fluid and adapted for insertion within said container to encompass or surround the structure for isostatic testing therein, fluid pressure measuring means communicating with said pressure-expansible fluid impermeable means for measuring fluid pressure therein and means communicating said means for providing pressurized fluid with said pressure-expansible fluid impermeable means for pressuring said pressure-expansible fluid impermeable means.
Inventors
- 👤 Jack J Early
- 👤 Alfred Stawsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:04
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N3/10; G01N2203/00; G01N2203/02; G01N2203/026; G01N2203/0284; G01N33/00; G01N33/38; G01N33/388
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
96 words
An isostatic test system comprising supply means for providing pressurized fluid, a rigid container, pressure-expansible fluid impermeable tubing for receiving pressurized fluid adapted for insertion within and helically wound within said rigid container in the annular space provided between said container and material for isostatic testing therein, said tubing being closed at one end and open at the other end to receive said pressurized fluid, fluid pressure measuring means communicating with said tubing for measuring fluid pressure therein and conduit means communicating said supply means with said pressure-expansible tubing for introducing pressurized fluid into said tubing.
Claim 2
Dependent Claim
96 words
An isostatic test system comprising supply means for providing pressurized fluid, a rigid container, pressure-expansible fluid impermeable tubing for receiving pressurized fluid adapted for insertion within and helically wound within said rigid container in the annular space provided between said container and material for isostatic testing therein, said tubing being closed at one end and open at the other end to receive said pressurized fluid, fluid pressure measuring means communicating with said tubing for measuring fluid pressure therein and conduit means communicating said supply means with said pressure-expansible tubing for introducing pressurized fluid into said tubing.
Claim 3
Dependent Claim
23 words
An isostatic test system in accordance with claim 1 wherein said means for providing pressurized fluid is a container provided with pressurized gas.
Claim 4
Dependent Claim
45 words
An isostatic test system in accordance with claim 2 wherein pressure regulating and reducing means is provided associated with said means for providing pressurized fluid to said pressure-expansible fluid impermeable tubing to control the pressure of the gas introduced into said pressure-expansible fluid impermeable tubing.
Claim 5
Dependent Claim
40 words
An isostatic test system in accordance with claim 1 wherein said pressure-expansible fluid impermeable tubing upon insertion within said rigid container and upon being pressurized by said pressurized fluid is in direct contact with said material for isostatic testing therein.
Claim 6
Dependent Claim
44 words
An isostatic test system in accordance with claim 1 wherein a load cell is provided in mechanical contact with said pressure-expansible fluid impermeable tubing within said container to measure the pressure exerted by said pressure-expansible fluid impermeable tubing upon said material within said container.
Claim 7
Dependent Claim
41 words
An isostatic test system in accordance with claim 1 wherein said rigid container is a cylindrical container open at the top, said container being provided with cover means for closing said container when said material for isostatic testing is placed therein.
Claim 8
Dependent Claim
27 words
An isostatic test system in accordance with claim 6 wherein a Teflon pad is provided between said cover and said material for isostatic testing within said container.
Claim 9
Dependent Claim
30 words
An isostatic test system in accordance with claim 1 wherein said pressure-expansible fluid impermeable tubing is supplied with pressurized fluid through a passageway through the wall of said container. Pg,21
Claim 10
Dependent Claim
31 words
An isostatic test system in accordance with claim 1 provided with recording means associated with said fluid pressure measuring means for recording the pressure measured by said fluid pressure measuring means.
Claim 11
Dependent Claim
22 words
An isostatic test system in accordance with claim 1 wherein said means for providing pressurized fluid comprises means for providing pressurized liquid.
Claim 12
Dependent Claim
141 words
Apparatus useful for the isostatic testing of a cylindrical ceramic honeycomb monolith comprising a rigid container adapted to receive said monolith through an opening in the top of said container and to provide an annulus between said monolith and said container when said monolith is placed within said container through said top opening, a side opening provided through the bottom side wall of said container, pressure-expansible gas impermeable tubing closed at one end and open at the other end adapted to be disposed within said annulus and helically wound within said container within the annulus provided between said container and said monolith for isostatic testing therein, conduit means for supplying pressurized gas to said tubing via said other end through said side opening provided in the side wall of said container and means for closing said top opening of said container.
Claim 13
Dependent Claim
141 words
Apparatus useful for the isostatic testing of a cylindrical ceramic honeycomb monolith comprising a rigid container adapted to receive said monolith through an opening in the top of said container and to provide an annulus between said monolith and said container when said monolith is placed within said container through said top opening, a side opening provided through the bottom side wall of said container, pressure-expansible gas impermeable tubing closed at one end and open at the other end adapted to be disposed within said annulus and helically wound within said container within the annulus provided between said container and said monolith for isostatic testing therein, conduit means for supplying pressurized gas to said tubing via said other end through said side opening provided in the side wall of said container and means for closing said top opening of said container.
Claim 14
Dependent Claim
19 words
Apparatus in accordance with claim 11 wherein means is provided for measuring the gaseous pressure applied to said tubing.
Claim 15
Dependent Claim
26 words
Apparatus in accordance with claim 12 wherein a Teflon pad is disposed between said monolith and said top means for closing said opening of said container.
Claim 16
Dependent Claim
41 words
Apparatus in accordance with claim 11 wherein a load cell is provided in mechanical contact with said tubing when disposed within said annulus and surrounding said monolith for isostatic testing for measuring the pressure applied by said tubing upon said monolith.
Claim 17
Independent Claim
118 words
A method for the isostatic testing of a honeycomb ceramic monolith structure which comprises placing said structure to be isostatically tested within a rigid confining zone, introducing pressure-expansible fluid impermeable tubing within the annular space defined by said structure and said zone and helically winding said tubing within said annular space to surround completely the outside of said structure within said zone, said tubing being closed at one end and open at the other end to receive pressurized fluid, and introducing pressurized fluid under controlled conditions with respect to increasing pressure into said tubing positioned in said annular space until the pressure applied to said structure by the expansion of said tubing is sufficient to fracture said structure.
Claim 18
Independent Claim
118 words
A method for the isostatic testing of a honeycomb ceramic monolith structure which comprises placing said structure to be isostatically tested within a rigid confining zone, introducing pressure-expansible fluid impermeable tubing within the annular space defined by said structure and said zone and helically winding said tubing within said annular space to surround completely the outside of said structure within said zone, said tubing being closed at one end and open at the other end to receive pressurized fluid, and introducing pressurized fluid under controlled conditions with respect to increasing pressure into said tubing positioned in said annular space until the pressure applied to said structure by the expansion of said tubing is sufficient to fracture said structure.
Claim 19
Dependent Claim
21 words
A method in accordance with claim 15 wherein the pressure to which said pressure-expansible fluid impermeable tubing is subjected is recorded.
Claim 20
Dependent Claim
14 words
A method in accordance with claim 15 wherein said pressurized fluid is pressurized gas.
References Cited (Backward Citations)
US2578031A
Cited
US3593749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |