US4482294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power unit for single line pneumatic tube system
Assignee: C K KELLEY AND SONS Inc
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Filing: 1982-04-23
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Granted: 1984-11-13
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Expires: 2002-04-23
Abstract
Abstract A pressure-vacuum chamber is mounted in a sheet metal housing having acoustical padding on inner surfaces of walls. The chamber has two vacuum-formed truncated cone members and a longitudinally extending axial partition plate sealingly mounted in inward facing grooves in the members. A flow-through blower is sealingly mounted in an aperture in the plate.
Inventors
- 👤 Charles K. Kelley
- 👤 William W. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:57
CPC Classifications
B; B65; B65G; B65G51/00; B65G51/04; B65G51/26; B65G51/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A power unit for alternately providing pressure of vacuum for a single line pneumatic tube carrier delivery system comprising a housing provided with acoustical padding, a drum-like pressure-vacuum chamber having a pressure port and a vacuum port mounted within the housing, the chamber being provided with acoustical padding, a longitudinally extending partition plate sealingly diametrically dividing the chamber into a pressure chamber and a vacuum chamber, at least one flow-through blower sealingly mounted in an aperture in the longitudinally extending partition plate, each chamber being provided with one of the ports, the pressure chamber being provided with the pressure port, the vacuum chamber being provided with the vacuum port, the blower extending through and being sealingly mounted in an aperture in the partition plate.
Claim 2
Dependent Claim
124 words
A power unit for alternately providing pressure of vacuum for a single line pneumatic tube carrier delivery system comprising a housing provided with acoustical padding, a drum-like pressure-vacuum chamber having a pressure port and a vacuum port mounted within the housing, the chamber being provided with acoustical padding, a longitudinally extending partition plate sealingly diametrically dividing the chamber into a pressure chamber and a vacuum chamber, at least one flow-through blower sealingly mounted in an aperture in the longitudinally extending partition plate, each chamber being provided with one of the ports, the pressure chamber being provided with the pressure port, the vacuum chamber being provided with the vacuum port, the blower extending through and being sealingly mounted in an aperture in the partition plate.
Claim 3
Dependent Claim
49 words
The power unit specified in claim 1 wherein the pressure-vacuum chamber has a shape substantially resembling two truncated conical sections with a common base, the partition plate is a longitudinally extending axially partition plate dividing the chamber into two chambers, and the ports are mounted side-by-side within the housing.
Claim 4
Dependent Claim
18 words
The power unit specified in claim 1 wherein a plurality of blowers are mounted in the partition plate.
Claim 5
Dependent Claim
15 words
The power unit specified in claim 1 wherein the housing is formed of sheet metal.
Claim 6
Dependent Claim
15 words
The power unit specified in claim 1 wherein the acoustical padding comprises sheets of polyester.
Claim 7
Dependent Claim
17 words
The power unit specified in claim 1 wherein the chamber has inner surfaces provided with acoustical padding.
Claim 8
Dependent Claim
19 words
The power unit specified in claim 6 wherein the acoustical padding is provided on inner surfaces of the housing.
Claim 9
Dependent Claim
14 words
The power unit specified in claim 7 wherein the acoustical padding comprises sheet polyester.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |