US4597723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low pressure air supply and control system
Assignee: Individual
•
Filing: 1982-06-07
•
Granted: 1986-07-01
•
Expires: 2002-06-07
Abstract
Abstract The invention concerns the combination of electric motor, diaphragm air pump, valving and switches in a compact form to provide a low pressure air supply and control system for use in inflating and/or deflating air chambers in seats. The air chambers may be so placed as to provide support to areas of the back of an occupant, support to the occupant's thighs, either singly or both at the same inflation/deflation and/or movement of the side bolsters of the seat. Additionally, it may be used to inflate/deflate the seat bottom.
Inventors
- 👤 Joseph A. Sember
- 👤 Joseph A. Sember, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/081; A47C27/083; A47C27/082; A47C27/10; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/467; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87877
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A low pressure air supply and control system comprising: (a) a motor having a rotary output shaft; (b) means for converting rotary motion of said output shaft to linear reciprocating motion; and (c) an air pump having (1) a variable volume pumping chanber having a reciprocating wall connected to said means for converting rotary motion to reciprocating motion; (2) an input port in fluid communication with said pumping chamber; (3) a one way valve permitting fluid flow from said input port into said pumping chamber; (4) an outlet passage in a fluid communication with said pumping chamber; (5) a one way valve means permitting fluid flow out of said pumping chamber through said outlet passage; (6) a discharge chamber in fluid communication with said outlet passage, said discharge chamber having a discharge passage in fluid communication therewith; (7) an exhaust passage in fluid communication with said discharge chamber; and (8) a depressurization valve normally biased into closed position selectively connecting said discharge chamber to said exhaust passage; said one way valve means permitting fluid flow through said outlet passage comprising a duckbill elastomeric valve affixed to a discharge end of said outlet passage located in said discharge chamber.
Claim 2
Dependent Claim
198 words
A low pressure air supply and control system comprising: (a) a motor having a rotary output shaft; (b) means for converting rotary motion of said output shaft to linear reciprocating motion; and (c) an air pump having (1) a variable volume pumping chanber having a reciprocating wall connected to said means for converting rotary motion to reciprocating motion; (2) an input port in fluid communication with said pumping chamber; (3) a one way valve permitting fluid flow from said input port into said pumping chamber; (4) an outlet passage in a fluid communication with said pumping chamber; (5) a one way valve means permitting fluid flow out of said pumping chamber through said outlet passage; (6) a discharge chamber in fluid communication with said outlet passage, said discharge chamber having a discharge passage in fluid communication therewith; (7) an exhaust passage in fluid communication with said discharge chamber; and (8) a depressurization valve normally biased into closed position selectively connecting said discharge chamber to said exhaust passage; said one way valve means permitting fluid flow through said outlet passage comprising a duckbill elastomeric valve affixed to a discharge end of said outlet passage located in said discharge chamber.
Claim 3
Dependent Claim
40 words
A low presure air supply according to claim 1 wherein said one way valve means permitting fluid flow through said outlet passage further comprises a one way flapper plate permitting fluid flow from said pumping chamber into said outlet passage.
Claim 4
Dependent Claim
49 words
A low pressure air supply according to claim 1, wherein said depressurization valve comprises a valve seal and a valve seat located in said discharge chamber, said seal being spring biased into engagement with said valve seat to block fluid flow from said discharge chamber to said exhaust passage.
References Cited (Backward Citations)
US2253206A
Cited
US2832373A
Cited
US2986098A
Cited
US3174507A
Cited
US3147767A
Cited
US3552436A
Cited
US3499464A
Cited
US3671151A
Cited
US4086036A
Cited
US4078728A
Cited
US4491157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |