Patent US3886745A successfully refreshed from Google Patents.
US3886745A
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US
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Hydraulic actuating device
Assignee: Tokico Ltd
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Filing: 1973-12-21
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Granted: 1975-06-03
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Expires: 1993-12-21
Abstract
Abstract A hydraulic actuating device has a gas generating means having a first piston slidable in a fluid tight relation therein, a given amount of self-combustible material charged in a chamber adjacent to the piston on one side thereof and an igniting means for said material; an ignition signal transmitting means to transmit an igniting signal to said igniting means; an actuating cylinder communicating with another chamber on the other side of said piston in said gas generating means and having a second piston slidable therein, with a liquid being filled between one side of said second piston and said other side of said first piston in said gas generating means; wherein said igniting means may be actuated by said signal transmitting means to ignite said selfcombustible material for applying gas pressure produced thereby to said first piston on said one side thereof, thus producing liquid pressure on said other side of the first piston which is transmitted to the actuating cylinder to actuate the second piston.
Inventors
- 👤 Fukumi Kaida
- 👤 Risaburo Nonaka
- 👤 Takeo Sugii
- 👤 Tetsuo Haraikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:58
CPC Classifications
F; F16; F16P; F16P7/00; F16P7/02; B; B60; B60T; B60T7/00; B60T7/12; F15; F15B; F15B15/00; F15B15/19; F42; F42D; F42D3/00; F16D; F16D2121/00; F16D2121/02; F16D2125/00; F16D2125/02; F16D2125/026; F16D2125/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
212 words
A hydraulic actuating device, comprising: a gas generating means having a first piston reciprocally slidable in a fluid tight relation therein, said means having a first chamber adjacent to the piston on one side thereof, a predetermined amount of self-combustible material in said chamber, and an igniting means therefor in igniting relationship with said material; detecting means for detecting an emergency condition, and an electric circuit to which said detecting means is connected and connected to said igniting means for issuing an igniting signal to said igniting means upon detection of an emergency condition by said detecting means; said gas generating means having a second chamber on the other side of said piston; an actuating cylinder communicating with said second chamber and having a second piston slidable therein, with a liquid filling the space between one side of said second piston and said other side of said first piston in said gas generating means; whereby, when said igniting means is actuated by said signal transmitting means to ignite said self-combustible material, gas pressure produced thereby is applied to said first piston on said one side thereof, thus exerting pressure on the liquid on said other side of the first piston which is transmitted to the actuating cylinder to actuate said second piston.
Claim 2
Dependent Claim
212 words
A hydraulic actuating device, comprising: a gas generating means having a first piston reciprocally slidable in a fluid tight relation therein, said means having a first chamber adjacent to the piston on one side thereof, a predetermined amount of self-combustible material in said chamber, and an igniting means therefor in igniting relationship with said material; detecting means for detecting an emergency condition, and an electric circuit to which said detecting means is connected and connected to said igniting means for issuing an igniting signal to said igniting means upon detection of an emergency condition by said detecting means; said gas generating means having a second chamber on the other side of said piston; an actuating cylinder communicating with said second chamber and having a second piston slidable therein, with a liquid filling the space between one side of said second piston and said other side of said first piston in said gas generating means; whereby, when said igniting means is actuated by said signal transmitting means to ignite said self-combustible material, gas pressure produced thereby is applied to said first piston on said one side thereof, thus exerting pressure on the liquid on said other side of the first piston which is transmitted to the actuating cylinder to actuate said second piston.
Claim 3
Dependent Claim
212 words
A hydraulic actuating device, comprising: a gas generating means having a first piston reciprocally slidable in a fluid tight relation therein, said means having a first chamber adjacent to the piston on one side thereof, a predetermined amount of self-combustible material in said chamber, and an igniting means therefor in igniting relationship with said material; detecting means for detecting an emergency condition, and an electric circuit to which said detecting means is connected and connected to said igniting means for issuing an igniting signal to said igniting means upon detection of an emergency condition by said detecting means; said gas generating means having a second chamber on the other side of said piston; an actuating cylinder communicating with said second chamber and having a second piston slidable therein, with a liquid filling the space between one side of said second piston and said other side of said first piston in said gas generating means; whereby, when said igniting means is actuated by said signal transmitting means to ignite said self-combustible material, gas pressure produced thereby is applied to said first piston on said one side thereof, thus exerting pressure on the liquid on said other side of the first piston which is transmitted to the actuating cylinder to actuate said second piston.
Claim 4
Dependent Claim
212 words
A hydraulic actuating device, comprising: a gas generating means having a first piston reciprocally slidable in a fluid tight relation therein, said means having a first chamber adjacent to the piston on one side thereof, a predetermined amount of self-combustible material in said chamber, and an igniting means therefor in igniting relationship with said material; detecting means for detecting an emergency condition, and an electric circuit to which said detecting means is connected and connected to said igniting means for issuing an igniting signal to said igniting means upon detection of an emergency condition by said detecting means; said gas generating means having a second chamber on the other side of said piston; an actuating cylinder communicating with said second chamber and having a second piston slidable therein, with a liquid filling the space between one side of said second piston and said other side of said first piston in said gas generating means; whereby, when said igniting means is actuated by said signal transmitting means to ignite said self-combustible material, gas pressure produced thereby is applied to said first piston on said one side thereof, thus exerting pressure on the liquid on said other side of the first piston which is transmitted to the actuating cylinder to actuate said second piston.
Claim 5
Dependent Claim
65 words
A hydraulic actuating device as set forth in claim 1, wherein said self-combustible material is comprised of a rapidly self-combustible material and a slowly self-combustible material the former burning prior to the latter, thereby producing a high pressure within a short time and the burning of the latter maintains the high pressure for a relatively long period of time after the self-combustible materials are ignited.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |