US3628378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic portable dynamometer
Assignee: United States Department of the Navy
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Filing: 1970-02-16
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Granted: 1971-12-21
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Expires: 1990-02-16
Abstract
Abstract A portable pneumatic dynamometer for developing, measuring and applying at a controlled rate both tension and compression-type loads between two movable members. A pressurized gas cartridge is utilized as the power source for which power regulation is provided by a pneumatic toggle switch and a needle valve, for controlling the rate of flow of the gas, and the movable parts consist of a housing and a piston slidable therein. Suitable attachment hardware is mounted to the housing and the piston for holding test specimens.
Inventors
- 👤 Edgar P Regan Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/04; G01N3/00; G01N3/08; G01N3/10; G01N2203/00; G01N2203/003; G01N2203/0042; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N2203/0282
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A materials-testing machine connectable to a Pneumatic power source comprising: a substantially cylindrical housing having an axial bore formed in one end thereof; a piston member including a pair of diametrically opposed, elongate legs having first and second end portions and a transverse planar portion slidably disposed within said bore, fixed to said first end portion of said legs and wherein said second end portion of said opposed legs extends beyond said bore and said legs define a continuous unobstructed area therebetween; means for transmitting a load from said housing and said piston member to a specimen under test; and means for measuring the pressure developed in said housing by said pneumatic power means.
Claim 2
Dependent Claim
114 words
A materials-testing machine connectable to a Pneumatic power source comprising: a substantially cylindrical housing having an axial bore formed in one end thereof; a piston member including a pair of diametrically opposed, elongate legs having first and second end portions and a transverse planar portion slidably disposed within said bore, fixed to said first end portion of said legs and wherein said second end portion of said opposed legs extends beyond said bore and said legs define a continuous unobstructed area therebetween; means for transmitting a load from said housing and said piston member to a specimen under test; and means for measuring the pressure developed in said housing by said pneumatic power means.
Claim 3
Dependent Claim
74 words
A materials-testing machine according to claim 1 wherein said load-transmitting means comprises: means adaptable to be secured to said housing for supporting said specimen under test in substantially coaxial relation with said housing and said piston and for receiving therein said depending portion of said piston, whereby upon movement of said piston away from said housing compression-loading is applied to said test specimen between said depending portion of said piston and said specimen-supporting means.
Claim 4
Dependent Claim
61 words
A materials-testing machine according to claim 1 connected to a pneumatic power means wherein said pneumatic power means comprises: a pressurized gas source; conduit means including rigid and flexible conduit members connecting said pressurized gas source and said bore of said housing on the side of said piston opposite said depending portion thereof; and flow rate controlling means in said conduit.
Claim 5
Dependent Claim
25 words
A materials-testing machine according to claim 3 wherein said pressure-measuring means is disposed in said conduit means between said flow rate-controlling means and said housing.
Claim 6
Dependent Claim
69 words
A materials-testing machine according to claim 1 wherein said load-transmitting means comprises: a substantially circular base member fixed to said second end portion of said opposed legs for attaching one end of said specimen to said piston; and means for attaching the other end of said specimen to said housing whereby upon movement of said housing and said piston in opposite directions tension-loading is applied to said test specimen.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |