US3908512A - Explosion gas operated piston-cylinder structure - Google Patents
Explosion gas operated piston-cylinder structure Download PDFInfo
- Publication number
- US3908512A US3908512A US369248A US36924873A US3908512A US 3908512 A US3908512 A US 3908512A US 369248 A US369248 A US 369248A US 36924873 A US36924873 A US 36924873A US 3908512 A US3908512 A US 3908512A
- Authority
- US
- United States
- Prior art keywords
- piston
- pair
- cylinder
- bounding surfaces
- segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 239000003380 propellant Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
Definitions
- a piston-cylinder drive structure particularly for use July l2, l972 Switzerland 10352/72 in actuating electric switchgear apparatus comprisesfa cylinder into which explosion gases are admitted for [52] US. Cl 91/357; 92/6 R; 92/89; actuating a piston located in the cylinder. Rather than 92/169; 92/193; 92/247 having a uniform cross-sectional area, the cross- [5 l Int. Cl.
- F15B 9/02 section of the cylinder is progressively increased in the [58] Field of Search 92/6 R, 6 D, 89, 169, 193, direction of piston travel and the piston includes 92/194, 247, 240; 91/394, 357, 402 means for effecting a like increase in its crosssectional area as it is actuated and maintains its en- [56] References Cited gagement with the cylinder wall. The result is a more UNITED STATES PATENTS favorable force-travel characteristic resulting in prac- 5/1918 Hudford X tically a constant pressure throughout the piston travel 2:554:55; 8,194.
- This invention relates to an improvement in a drive apparatus of the type in which a piston is displaced in a cylinder by explosion ofa charge, in particular for operating electrical switchgear.
- the principal object of the invention is to provide a solution such that the pressure and piston displacement are better matched to each other, resulting in a more favorable force/travel characteristic, e.g., practically constant pressure throughout the piston travel, for the drive apparatus described above.
- This objective is achieved in that the cylinder chamber is of rectangular cross-section, the cross-section area increasing progressively in the direction of piston travel, and that the piston which likewise increases in area incorporates means whereby a seal, at least quasi-leakproof, is maintained between the piston and the inner cylinder wall during the mechanical movement.
- FIG. 1 is a sectional elevation of the drive apparatus
- FIG. 2 is a cross-section through the apparatus at line AA and viewed in the direction of the arrows.
- the drive piston 1 is located in cylinder chamber 2.
- the latter is of rectangular cross-section increasing progressively in area in the direction of piston displacement.
- a conical housing 3 contains four segment-shaped elements 2a to 2d.
- the cylinder chamber 2 thus has two wedge-shaped and two parallel bounding surfaces, the former being formed by elements 20, 2d and the latter by elements 2a, 2b.
- the housing 3 is enclosed at one end by a flanged cover 4 through which the piston rod 1a of piston 1 passes.
- an opening 5 through which the explosion gases are admitted.
- a combustion chamber not described in further detail, with an ignition device and supply of explosion propellant.
- the head of piston l subjected to the explosion gases and which is expandable in area when moving in the driven direction comprises two flaps 6 which are pivoted about studs 7 to establish the increasing cross-sectional area character of the piston that matches the increasing cross-sectional area of the explosion chamber.
- the flaps 6 are pressed at their lower rounded ends by spring 8 into sealing engagement against elements 20, 2d.
- the flaps 6 are sealed along their sides relative to elements 2a, 2]; by pieces 10, e.g., of steel, inserted in corresponding slots.
- spring devices e.g., corrugated spring strips 9 can be inserted between pieces 10 and the base of the slots, as shown in more detail in FIG. 2.
- the flaps 6 are sealed relative to one another by a steel element 11 which fills the intervening space.
- the discharge ports 12 in the segment shaped elements 2a, 2b open at or shortly before the upper end position as they are partly uncovered by the expandable piston head as shown by the broken line position of these flaps in FIG. 1 so that the explosion gases can escape through ports 12 and the openings 13 in flange cover 4. If the switching device is also to be driven in the opposite direction by drive apparatus of the kind proposed, one such apparatus is provided for each direction, the one being returned to its starting position by the other.
Landscapes
- Actuator (AREA)
- Portable Nailing Machines And Staplers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1035272 | 1972-07-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3908512A true US3908512A (en) | 1975-09-30 |
Family
ID=4362288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US369248A Expired - Lifetime US3908512A (en) | 1972-07-12 | 1973-06-12 | Explosion gas operated piston-cylinder structure |
Country Status (6)
Country | Link |
---|---|
US (1) | US3908512A (fr) |
CH (1) | CH547008A (fr) |
DE (1) | DE2237659A1 (fr) |
FR (1) | FR2192617A5 (fr) |
GB (1) | GB1414054A (fr) |
IT (1) | IT990983B (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995535A (en) * | 1975-05-23 | 1976-12-07 | Russell Ozechowski | Expansible chamber device |
US4452126A (en) * | 1981-05-05 | 1984-06-05 | Mitko Tomov | Pneumatic drive |
US6978711B1 (en) * | 1999-04-22 | 2005-12-27 | Van Der Blom Nicolaas | Combination of a chamber and a piston, a pump, a motor, a shock absorber and a transducer incorporating the combination |
US20080006147A1 (en) * | 2002-05-24 | 2008-01-10 | Blom Nicolaas V D | Device comprising a combination of a chamber and a piston |
EP2884089A1 (fr) * | 2013-12-10 | 2015-06-17 | Robert Bosch Gmbh | Coupleur hydraulique |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3621186A1 (de) * | 1986-06-25 | 1988-01-07 | Bbc Brown Boveri & Cie | Verfahren und vorrichtung zum antrieb eines linear bewegbaren bauelementes, insbesondere des beweglichen schaltkontaktes eines elektrischen hochspannungs-leistungsschalters |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1266252A (en) * | 1917-05-09 | 1918-05-14 | Louis Hadford | Pump. |
US2254026A (en) * | 1938-08-04 | 1941-08-26 | Carter Carburetor Corp | Piston |
US2430492A (en) * | 1945-10-29 | 1947-11-11 | Carter Carburetor Corp | Accelerating pump |
US2710077A (en) * | 1952-01-16 | 1955-06-07 | Vibratrol Inc | Hydraulic shock absorber |
US3111808A (en) * | 1962-08-20 | 1963-11-26 | Rocket Power Inc | Thruster |
US3245591A (en) * | 1964-02-20 | 1966-04-12 | Crown Cork & Seal Co | Dispensing piston can |
US3502002A (en) * | 1968-04-02 | 1970-03-24 | Whiteman Mfg Co | Means for synchronizing a pair of hydraulic power cylinder actuators |
-
1972
- 1972-07-12 CH CH1035272A patent/CH547008A/xx not_active IP Right Cessation
- 1972-07-31 DE DE2237659A patent/DE2237659A1/de active Pending
-
1973
- 1973-06-12 US US369248A patent/US3908512A/en not_active Expired - Lifetime
- 1973-07-06 IT IT26259/73A patent/IT990983B/it active
- 1973-07-10 GB GB3284673A patent/GB1414054A/en not_active Expired
- 1973-07-10 FR FR7325172A patent/FR2192617A5/fr not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1266252A (en) * | 1917-05-09 | 1918-05-14 | Louis Hadford | Pump. |
US2254026A (en) * | 1938-08-04 | 1941-08-26 | Carter Carburetor Corp | Piston |
US2430492A (en) * | 1945-10-29 | 1947-11-11 | Carter Carburetor Corp | Accelerating pump |
US2710077A (en) * | 1952-01-16 | 1955-06-07 | Vibratrol Inc | Hydraulic shock absorber |
US3111808A (en) * | 1962-08-20 | 1963-11-26 | Rocket Power Inc | Thruster |
US3245591A (en) * | 1964-02-20 | 1966-04-12 | Crown Cork & Seal Co | Dispensing piston can |
US3502002A (en) * | 1968-04-02 | 1970-03-24 | Whiteman Mfg Co | Means for synchronizing a pair of hydraulic power cylinder actuators |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995535A (en) * | 1975-05-23 | 1976-12-07 | Russell Ozechowski | Expansible chamber device |
US4452126A (en) * | 1981-05-05 | 1984-06-05 | Mitko Tomov | Pneumatic drive |
US6978711B1 (en) * | 1999-04-22 | 2005-12-27 | Van Der Blom Nicolaas | Combination of a chamber and a piston, a pump, a motor, a shock absorber and a transducer incorporating the combination |
US20060032370A1 (en) * | 1999-04-22 | 2006-02-16 | Nvb Composites International A/S | Combination of a chamber and a piston, a pump, a motor, a shock absorber and a transducer incorporating the combination |
US20100170391A1 (en) * | 1999-04-22 | 2010-07-08 | Nvb Composites International A/S | Combination of a chamber and a piston, a pump, a motor, a shock absorber and transducer incorporating the combination |
US8127660B2 (en) * | 1999-04-22 | 2012-03-06 | Nicolaas Van Der Blom | Combination of a chamber and a piston, a pump, a motor, a shock absorber and transducer incorporating the combination |
US20080006147A1 (en) * | 2002-05-24 | 2008-01-10 | Blom Nicolaas V D | Device comprising a combination of a chamber and a piston |
US7461582B2 (en) * | 2002-05-24 | 2008-12-09 | Van Der Blom Nicolaas | Device comprising a combination of a chamber and a piston |
EP2884089A1 (fr) * | 2013-12-10 | 2015-06-17 | Robert Bosch Gmbh | Coupleur hydraulique |
Also Published As
Publication number | Publication date |
---|---|
GB1414054A (en) | 1975-11-12 |
DE2237659A1 (de) | 1974-01-24 |
CH547008A (de) | 1974-03-15 |
FR2192617A5 (fr) | 1974-02-08 |
IT990983B (it) | 1975-07-10 |
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