US3213758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air operated control device
Assignee: Gardner Denver Inc
•
Filing: 1961-02-06
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Granted: 1965-10-26
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Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Workman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:58
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; B; B66; B66D; B66D1/00; B66D1/02; B66D1/08; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN AIR OPERATED CONTROL DEVICE COMPRISING MEANS DEFINING AN AIR CHAMBER; A PISTON MOVABLE RECTILINEARLY WITHIN SAID CHAMBER IN SEALED RELATION WITH THE WALLS THEREOF; MEANS BIASING SAID PISTON TOWARD ONE END OF SAID CHAMBER; CONDUIT MEANS COMMUNICATING WITH SAID ONE END OF SAID CHAMBER FOR CONNECTION WITH A SOURCE OF PRESSUREIZED AIR; MANUALLY OPERABLE VALVE MEANS IN SAID CONDUIT FOR REGULATING THE FLOW OF AIR TO SAID CHAMBER; MEANS DEFINING A FIRST CONTINUOUSLY OPEN BLEED PASSAGE COMMUNICATING THE ENDS OF SAID CHAMBER ON EITHER SIDE OF SAID PISTON; MEANS DEFINING A SECOND CONTINUOUSLY OPEN BLEED PASSAGE OPENING FROM THE OTHER END OF SAID CHAMBER TO ATMOS-
Claim 2
Dependent Claim
107 words
AN AIR OPERATED CONTROL DEVICE COMPRISING MEANS DEFINING AN AIR CHAMBER; A PISTON MOVABLE RECTILINEARLY WITHIN SAID CHAMBER IN SEALED RELATION WITH THE WALLS THEREOF; MEANS BIASING SAID PISTON TOWARD ONE END OF SAID CHAMBER; CONDUIT MEANS COMMUNICATING WITH SAID ONE END OF SAID CHAMBER FOR CONNECTION WITH A SOURCE OF PRESSUREIZED AIR; MANUALLY OPERABLE VALVE MEANS IN SAID CONDUIT FOR REGULATING THE FLOW OF AIR TO SAID CHAMBER; MEANS DEFINING A FIRST CONTINUOUSLY OPEN BLEED PASSAGE COMMUNICATING THE ENDS OF SAID CHAMBER ON EITHER SIDE OF SAID PISTON; MEANS DEFINING A SECOND CONTINUOUSLY OPEN BLEED PASSAGE OPENING FROM THE OTHER END OF SAID CHAMBER TO ATMOS-
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |