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 tube

Info

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
Application number
FR7723364A
Other languages
French (fr)
Other versions
FR2398207B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ACME
Original Assignee
ACME
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ACME filed Critical ACME
Priority to FR7723364A priority Critical patent/FR2398207A1/en
Publication of FR2398207A1 publication Critical patent/FR2398207A1/en
Application granted granted Critical
Publication of FR2398207B1 publication Critical patent/FR2398207B1/fr
Granted legal-status Critical Current

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).
FR7723364A 1977-07-22 1977-07-22 Lock for telescopic crane mast - has springs to hold notched levers against pins projecting inside outer tube Granted FR2398207A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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