Patent US4390013A successfully refreshed from Google Patents.
US4390013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussor assembly
Assignee: CREDITANSTALT-BANKVEREIN
•
Filing: 1980-12-29
•
Granted: 1983-06-28
•
Expires: 2000-12-29
Abstract
Abstract A percussor assembly having a gas inlet passageway, a gas outlet passageway, a gas sealing means therebetween, and a percussion member which is moved in response to gas pressure from the gas inlet passageway overcoming the gas sealing means, which gas pressure is then vented through the gas outlet passageway, includes a valve member for closing the gas inlet passageway when the gas pressure is vented through the gas outlet passageway.
Inventors
- 👤 Victor L. Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
A; A61; A61H; A61H23/00; A61H23/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
In a percussor assembly having a gas inlet passageway, a first gas chamber communicating therewith, a gas outlet passageway, and movable gas sealing means for providing a gas-tight seal between said first gas chamber and said gas outlet passageway, whereby increased gas pressure in said first gas chamber moves said gas sealing means and breaks said gas-tight seal resulting in said increased gas pressure in said gas pressure chamber being relieved through said gas outlet passageway, the improvement comprising valve means cooperating between said gas inlet passageway and said gas outlet passageway for closing said gas inlet passageway in response to said gas pressure being relieved through said gas outlet passageway.
Claim 2
Dependent Claim
111 words
In a percussor assembly having a gas inlet passageway, a first gas chamber communicating therewith, a gas outlet passageway, and movable gas sealing means for providing a gas-tight seal between said first gas chamber and said gas outlet passageway, whereby increased gas pressure in said first gas chamber moves said gas sealing means and breaks said gas-tight seal resulting in said increased gas pressure in said gas pressure chamber being relieved through said gas outlet passageway, the improvement comprising valve means cooperating between said gas inlet passageway and said gas outlet passageway for closing said gas inlet passageway in response to said gas pressure being relieved through said gas outlet passageway.
Claim 3
Dependent Claim
57 words
The percussor assembly of claim 1 including a movable percussion member, and a second gas chamber communicating with said gas outlet passageway, said gas sealing means being movable between a first position providing said gas-tight seal, and a second position whereby said first gas chamber communicates with said second gas chamber whereby said percussion member is moved.
Claim 4
Dependent Claim
24 words
The percussor assembly of claim 1 wherein said valve means includes a cross-passageway communicating between said gas outlet passageway and said gas inlet passageway.
Claim 5
Dependent Claim
18 words
The percussor assembly of claim 3 wherein said valve means includes a valve body movable in said cross-passageway.
Claim 6
Dependent Claim
35 words
The percussor of claim 4 wherein said valve body is movable between a first position in which said gas inlet passageway is open, and a second position in which said gas inlet passageway is closed.
Claim 7
Dependent Claim
17 words
The percussor of claim 5 including biasing means for urging said valve body to said first position.
Claim 8
Dependent Claim
73 words
In a percussor assembly having a gas inlet passageway, a gas outlet passageway, a gas sealing means therebetween, and a percussion member, whereby gas pressure in said gas inlet passageway sufficient to overcome said gas sealing means causes movement of said percussion member and is vented through said gas outlet passageway, an improvement comprising a valve member for closing said gas inlet passageway when gas pressure is vented through said gas outlet passageway.
Claim 9
Dependent Claim
73 words
In a percussor assembly having a gas inlet passageway, a gas outlet passageway, a gas sealing means therebetween, and a percussion member, whereby gas pressure in said gas inlet passageway sufficient to overcome said gas sealing means causes movement of said percussion member and is vented through said gas outlet passageway, an improvement comprising a valve member for closing said gas inlet passageway when gas pressure is vented through said gas outlet passageway.
References Cited (Backward Citations)
US1023267A
Cited
FR488311A
Cited
US1780876A
Cited
GB344986A
Cited
US2398178A
Cited
US2615463A
Cited
US2646039A
Cited
US3396721A
Cited
US3648721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |