Patent US3109442A successfully refreshed from Google Patents.
US3109442A
Expired / Lapsed
US
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Tractor protection valve
Assignee: Berg Airlectro Products Co
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Filing: 1961-10-11
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Granted: 1963-11-05
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Expires: 1981-10-11
Abstract
No abstract record available.
Inventors
- 👤 Horowitz Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:45
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; B60T11/32; B60T11/326; F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/26; F16K3/00; F16K3/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/8593; Y10T137/86493; Y10T137/86558; Y10T137/86879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A VALVE A HOUSING, A CHAMBER IN SAID HOUSING, AT LEAST ONE INLET PORT FORMED IN SAID HOUSING AND COMMUNICATING WITH SAID CHAMBER, AT LEAST ONE OUTLET PORT FORMED IN SAID HOUSING AND COMMUNICATING WITH SAID CHAMBER, A SHUTTLE RECIPROCAL IN SAID CHAMBER, OPERATING PRESSURE INLETS POSITIONED IN SAID HOUSING TO DELIVER FLUID PRESSURE AGAINST SAID SHUTTLE AND TO URGE THE SAME ALTERNATELY IN OPPOSITE DIRECTIONS, SAID SHUTTLE AND HOUSING HAVING COOPERATING CONFIGURATIONS EFFECTIVE TO PRODUCE SUBSTANTIALLY IDENTICAL COMMUNICATION BETWEEN SAID INLET AND OUTLET PORTS WHEN SAID SHUTTLE IS MOVED IN EITHER DIRECTION WITHIN SAID CHAMBER, A PASSAGE CONFIGURATION BETWEEN SAID HOUSING AND SHUTTLE AND EFFECTIVE TO PRODUCE COMMUNICATION BETWEEN ONE OF SAID OPERATING PRESSURE INLETS AND SAID OUTLET PORT WHEN SAID INLET PORT IS SEALED AGAINST COMMUNICATION WITH SAID OUTLET PORT.
Claim 2
Dependent Claim
133 words
IN A VALVE A HOUSING, A CHAMBER IN SAID HOUSING, AT LEAST ONE INLET PORT FORMED IN SAID HOUSING AND COMMUNICATING WITH SAID CHAMBER, AT LEAST ONE OUTLET PORT FORMED IN SAID HOUSING AND COMMUNICATING WITH SAID CHAMBER, A SHUTTLE RECIPROCAL IN SAID CHAMBER, OPERATING PRESSURE INLETS POSITIONED IN SAID HOUSING TO DELIVER FLUID PRESSURE AGAINST SAID SHUTTLE AND TO URGE THE SAME ALTERNATELY IN OPPOSITE DIRECTIONS, SAID SHUTTLE AND HOUSING HAVING COOPERATING CONFIGURATIONS EFFECTIVE TO PRODUCE SUBSTANTIALLY IDENTICAL COMMUNICATION BETWEEN SAID INLET AND OUTLET PORTS WHEN SAID SHUTTLE IS MOVED IN EITHER DIRECTION WITHIN SAID CHAMBER, A PASSAGE CONFIGURATION BETWEEN SAID HOUSING AND SHUTTLE AND EFFECTIVE TO PRODUCE COMMUNICATION BETWEEN ONE OF SAID OPERATING PRESSURE INLETS AND SAID OUTLET PORT WHEN SAID INLET PORT IS SEALED AGAINST COMMUNICATION WITH SAID OUTLET PORT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |