Patent US4372423A successfully refreshed from Google Patents.
US4372423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Escape chute
Assignee: Individual
•
Filing: 1981-01-05
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Granted: 1983-02-08
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Expires: 2001-01-05
Abstract
Abstract A safety chute for enabling people to escape from a building during an emergency which consists of a tube, a water tank located at the bottom of the tube, and a parachute inside the tube for controlling the velocity of the descending person. By raising the water level above the tube exit, air is trapped between the water and the parachute, thereby providing the upward pressure on the parachute during the descent.
Inventors
- 👤 Ronald L. Pelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:34
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
An apparatus for descending an object from an elevated location comprising: an elongated tube; a means of restricting the air flow through the lower tube exit; and a descending device within said tube connected to said descending object, said device restricting the relative upward air flow passed said device during the descent, whereby a buildup of pressure occurs below said descending device during the descent.
Claim 2
Independent Claim
65 words
An apparatus for descending an object from an elevated location comprising: an elongated tube; a means of restricting the air flow through the lower tube exit; and a descending device within said tube connected to said descending object, said device restricting the relative upward air flow passed said device during the descent, whereby a buildup of pressure occurs below said descending device during the descent.
Claim 3
Independent Claim
53 words
An apparatus for descending an object from an elevated location comprising: an elongated tube; a means of restricting the air flow through the lower tube exit; and a parachute located within said tube, said parachute connected to the descending object, whereby a buildup of pressure occurs below said descending parachute during the descent.
Claim 4
Independent Claim
53 words
An apparatus for descending an object from an elevated location comprising: an elongated tube; a means of restricting the air flow through the lower tube exit; and a parachute located within said tube, said parachute connected to the descending object, whereby a buildup of pressure occurs below said descending parachute during the descent.
Claim 5
Independent Claim
53 words
An apparatus for descending one or more objects from an elevated location comprising: an elongated tube; a tank of water or liquid located at the tube lower exit with the water surface level being above the tube exit; and a parachute located within said tube, said parachute being attachable to the descending object.
Claim 6
Independent Claim
53 words
An apparatus for descending one or more objects from an elevated location comprising: an elongated tube; a tank of water or liquid located at the tube lower exit with the water surface level being above the tube exit; and a parachute located within said tube, said parachute being attachable to the descending object.
Claim 7
Dependent Claim
47 words
A conveyor comprising: an elongated tube; a means of restricting the air flow through the lower tube exit; a parachute located within said tube and connected to the object being conveyed; and a means of increasing the air pressure between said parachute and said lower tube exit.
Claim 8
Dependent Claim
47 words
A conveyor comprising: an elongated tube; a means of restricting the air flow through the lower tube exit; a parachute located within said tube and connected to the object being conveyed; and a means of increasing the air pressure between said parachute and said lower tube exit.
Claim 9
Dependent Claim
36 words
The apparatus of claim 1 wherein a tank of water or other liquid is used as the means or restricting the air flow through the lower tube exit, the liquid surface level being above said exit.
References Cited (Backward Citations)
US2779596A
Cited
GB1339414A
Cited
US3973644A
Cited
US4105173A
Cited
US4122934A
Cited
US3977312A
Cited
US4099596A
Cited
US4099595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |