FR2398207A1 - Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tube - Google Patents
Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tubeInfo
- Publication number
- FR2398207A1 FR2398207A1 FR7723364A FR7723364A FR2398207A1 FR 2398207 A1 FR2398207 A1 FR 2398207A1 FR 7723364 A FR7723364 A FR 7723364A FR 7723364 A FR7723364 A FR 7723364A FR 2398207 A1 FR2398207 A1 FR 2398207A1
- Authority
- FR
- France
- Prior art keywords
- outer tube
- springs
- lock
- hold
- inside outer
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
- B66C23/28—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels
- B66C23/30—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels with frameworks composed of telescopic elements
- B66C23/305—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels with frameworks composed of telescopic elements with locking devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/10—Telescoping systems
- F16B7/105—Telescoping systems locking in discrete positions, e.g. in extreme extended position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The telescopic mast of a large crane is assembled from two square tubes (1) (2) which fit one inside the other. Two levers (6) are mounted on opposite ends of a common shaft (3) which passes through the inner tube (1). The end of each lever (6) is notched to engage short pins (7) projecting inwards from the walls of the outer tube (2). A spring (10) holds the lever (6) against the pin in the assembled position. If the inner tube (1) is partially withdrawn, the lever (6) is pulled clear of the pin (7) so that the inner tube (1) can be pushed fully into the outer tube (2).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7723364A FR2398207A1 (en) | 1977-07-22 | 1977-07-22 | Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7723364A FR2398207A1 (en) | 1977-07-22 | 1977-07-22 | Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tube |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2398207A1 true FR2398207A1 (en) | 1979-02-16 |
FR2398207B1 FR2398207B1 (en) | 1984-05-18 |
Family
ID=9193974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7723364A Granted FR2398207A1 (en) | 1977-07-22 | 1977-07-22 | Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tube |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2398207A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2484385A1 (en) * | 1980-06-17 | 1981-12-18 | Petitjean Et Cie | Lifting hoist for load - has pivoted locking hook on load engaging in vertical locking bar on support frame |
WO1983001493A1 (en) * | 1981-10-26 | 1983-04-28 | Robinson, Allan, Francis | Latch |
EP0288430A1 (en) * | 1987-04-21 | 1988-10-26 | Visita Mtc Ltd. | Locking mechanism, especially for the height adjustment of table tops |
CN107445076A (en) * | 2017-07-18 | 2017-12-08 | 北汽福田汽车股份有限公司 | Arm pin mechanism and crane |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR525480A (en) * | 1920-10-01 | 1921-09-22 | Jules Bardin | Articulated and controlled flying buttress device, applicable to goats or other elevators with telescopic pylons |
FR1199615A (en) * | 1958-03-19 | 1959-12-15 | Potain & Cie Ets F | Improvements to telescopic masts for cranes and the like |
DE1072790B (en) * | 1958-03-06 | 1960-01-07 | Electricite De France-Service National, Paris | Ratchet lock for load carriers moving in a vertical tube or the like |
FR1328991A (en) * | 1962-04-24 | 1963-06-07 | Potain & Cie Ets F | Improvements to locking devices for telescopic masts |
FR1386512A (en) * | 1963-12-04 | 1965-01-22 | Potain & Cie Ets F | Improvements to devices for blocking and locking two elements of a telescopic mast |
FR1440796A (en) * | 1965-04-12 | 1966-06-03 | Richier Sa | Automatic locking device of a telescopic mast |
US3269561A (en) * | 1964-11-27 | 1966-08-30 | Dresser Ind | Latching mechanism for telescoping members |
FR1569917A (en) * | 1968-04-12 | 1969-06-06 | ||
US3697103A (en) * | 1970-11-03 | 1972-10-10 | Defense Australia | Telescopic tube locking and unlocking system |
-
1977
- 1977-07-22 FR FR7723364A patent/FR2398207A1/en active Granted
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR525480A (en) * | 1920-10-01 | 1921-09-22 | Jules Bardin | Articulated and controlled flying buttress device, applicable to goats or other elevators with telescopic pylons |
DE1072790B (en) * | 1958-03-06 | 1960-01-07 | Electricite De France-Service National, Paris | Ratchet lock for load carriers moving in a vertical tube or the like |
FR1199615A (en) * | 1958-03-19 | 1959-12-15 | Potain & Cie Ets F | Improvements to telescopic masts for cranes and the like |
FR1328991A (en) * | 1962-04-24 | 1963-06-07 | Potain & Cie Ets F | Improvements to locking devices for telescopic masts |
FR1386512A (en) * | 1963-12-04 | 1965-01-22 | Potain & Cie Ets F | Improvements to devices for blocking and locking two elements of a telescopic mast |
US3269561A (en) * | 1964-11-27 | 1966-08-30 | Dresser Ind | Latching mechanism for telescoping members |
FR1440796A (en) * | 1965-04-12 | 1966-06-03 | Richier Sa | Automatic locking device of a telescopic mast |
FR1569917A (en) * | 1968-04-12 | 1969-06-06 | ||
US3697103A (en) * | 1970-11-03 | 1972-10-10 | Defense Australia | Telescopic tube locking and unlocking system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2484385A1 (en) * | 1980-06-17 | 1981-12-18 | Petitjean Et Cie | Lifting hoist for load - has pivoted locking hook on load engaging in vertical locking bar on support frame |
WO1983001493A1 (en) * | 1981-10-26 | 1983-04-28 | Robinson, Allan, Francis | Latch |
EP0288430A1 (en) * | 1987-04-21 | 1988-10-26 | Visita Mtc Ltd. | Locking mechanism, especially for the height adjustment of table tops |
US4860668A (en) * | 1987-04-21 | 1989-08-29 | Visita Mtc Ltd. | Movement-controlled locking mechanism, particularly for movable support tables or platforms |
CN107445076A (en) * | 2017-07-18 | 2017-12-08 | 北汽福田汽车股份有限公司 | Arm pin mechanism and crane |
CN107445076B (en) * | 2017-07-18 | 2019-02-26 | 北汽福田汽车股份有限公司 | Arm pin mechanism and crane |
Also Published As
Publication number | Publication date |
---|---|
FR2398207B1 (en) | 1984-05-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE7703599L (en) | CONNECTION FOR PIPELINES | |
SE8304749L (en) | DEVICE FOR GRIPPING A MULTIPLE FUEL SPELL | |
GB1176536A (en) | Improvements in Gear Selector and Control Device for Transmission Mechanisms | |
FR2398207A1 (en) | Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tube | |
US2057329A (en) | Tubular scaffolding | |
FR2350175A1 (en) | Tool for making push-fit spigot and socket pipe joint - has two tied coaxial collars with rack and lever mechanisms drawing one pipe into other | |
JPS5396674A (en) | Photo mask | |
JPS5276944A (en) | Optical filter | |
FR2374496A1 (en) | Angle coupling system for push-rod roof light operating mechanism - consists of chain in U=section guide and sliding bar recessed in guide housings | |
KR850003807A (en) | Spring clip inserter | |
JPS5453796A (en) | Control rod assembly | |
FR2269385A1 (en) | Bending mandrel for tube bending machine - has discs threaded on cable with end stop and hole receiving locking pin | |
JPS5379195A (en) | Control rod driving device | |
JPS6040953Y2 (en) | tripod leg locking device | |
JPS55103157A (en) | Shift checking mechanism | |
GB1543796A (en) | Puller for pulling a member mounted on a shaft end portion thereof | |
JPS5292068A (en) | Traction transmission apparatus | |
SU532547A1 (en) | Device for fastening and returning the root end of the root chain | |
NL7701817A (en) | Connector for scaffolding or bannister tube ends - has intermediate element ot rotate central bolt with opposite: handed screw ends engaging expanding nuts in tubes | |
GB778624A (en) | Improvements in or relating to props, shoring devices and the like | |
JPS5639855A (en) | Positioning and clamping device | |
SU899816A1 (en) | Lock | |
JPS5338032A (en) | Locking device | |
ES285568U (en) | Automated device for extending bars (Machine-translation by Google Translate, not legally binding) | |
JPS51146836A (en) | Optical fiber cable |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name | ||
CN | Change in juridical nature | ||
GC | Lien (pledge) constituted | ||
ST | Notification of lapse |