US3764235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic pump
Assignee: Dynamit Nobel AG
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Filing: 1971-12-27
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Granted: 1973-10-09
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Expires: 1991-12-27
Abstract
Abstract A pneumatic pump device for the removal of water from holes inlcuding an inflatable cylindrical hollow body of an elastic material sealed off on both ends by sealing elements. A flexible riser is arranged to extend in the axial direction through the hollow body and in sealing contact through both of the sealing elements. First and second bores are provided, one in each of the sealing elements for permitting the entry and egress of a gas to and from the hollow body. In one of these bores a valve is installed which is controlled by the internal pressure of the hollow body.
Inventors
- 👤 V Bittermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:53
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/314
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
A pneumatic pump device for the removal of water from holes comprising an inflatable hollow body of an elastic material, sealing elements disposed on the upper and lower ends thereof for sealing off the same, a flexible riser extending in the axial direction through said hollow body and sealingly through both of said sealing elements, a first bore positioned in one of the sealing elements, means for permitting the entry of a gas into said hollow body to expand said hollow body into sealing position with a hole, a second bore disposed in the other of said sealing elements, and a valve means disposed in said second bore for regulating the egress of said gas from said hollow body into the hole upon the gas in said hollow body reaching a predetermined pressure whereby water below said hollow body is discharged through said riser out of the hole by said gas passing through said valve means.
Claim 2
Dependent Claim
156 words
A pneumatic pump device for the removal of water from holes comprising an inflatable hollow body of an elastic material, sealing elements disposed on the upper and lower ends thereof for sealing off the same, a flexible riser extending in the axial direction through said hollow body and sealingly through both of said sealing elements, a first bore positioned in one of the sealing elements, means for permitting the entry of a gas into said hollow body to expand said hollow body into sealing position with a hole, a second bore disposed in the other of said sealing elements, and a valve means disposed in said second bore for regulating the egress of said gas from said hollow body into the hole upon the gas in said hollow body reaching a predetermined pressure whereby water below said hollow body is discharged through said riser out of the hole by said gas passing through said valve means.
Claim 3
Dependent Claim
18 words
A pneumatic pump device according to claim 1 wherein said hollow body and said sealing elements are cylindrical.
Claim 4
Dependent Claim
34 words
A pneumatic pump device according to claim 1 wherein said means for permitting entry of a gas is provided with a connection means for the feeding of a compressed gas to said hollow body.
Claim 5
Dependent Claim
23 words
A pneumatic pump device according to claim 1 wherein said flexible riser consists of two pipe sections telescopically joined within said hollow body.
Claim 6
Dependent Claim
18 words
A pneumatic pump device according to claim 1 wherein said flexible riser consists of a flexible wire-reinforced hose.
Claim 7
Dependent Claim
26 words
A pneumatic pump device according to claim 1 further comprising means connected with the ends of said flexible riser for coupling said riser with additional pipes.
Claim 8
Dependent Claim
19 words
A pneumatic pump device according to claim 1 wherein said first bore is disposed in the upper sealing element.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |