GB729941A - Improvements in hydraulic drop hammers - Google Patents

Improvements in hydraulic drop hammers

Info

Publication number
GB729941A
GB729941A GB25819/52A GB2581952A GB729941A GB 729941 A GB729941 A GB 729941A GB 25819/52 A GB25819/52 A GB 25819/52A GB 2581952 A GB2581952 A GB 2581952A GB 729941 A GB729941 A GB 729941A
Authority
GB
United Kingdom
Prior art keywords
valve
piston
hammer head
hammer
drop
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
Application number
GB25819/52A
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.)
Langenstein and Schemann GmbH
Original Assignee
Langenstein and Schemann GmbH
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 Langenstein and Schemann GmbH filed Critical Langenstein and Schemann GmbH
Publication of GB729941A publication Critical patent/GB729941A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/36—Drives for hammers; Transmission means therefor for drop hammers
    • B21J7/40—Drives for hammers; Transmission means therefor for drop hammers driven by hydraulic or liquid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/46—Control devices specially adapted to forging hammers, not restricted to one of the preceding subgroups

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

729,941. Hydraulic drop hammers. LANGENSTEIN UND SCHEMANN AKT.-GES. Oct. 15, 1952 [Oct. 29, 1951], No. 25819/52. Class 83 (4). In a drop hammer whose hammer head 4 is raised by pressure liquid supplied to the underside of a piston 2 and is allowed to fall upon the opening of a return shut-off valve 20 which is closed when the hammer head has fallen, the closing of the valve is effected in dependence upon the striking of a work-piece by the hammer head. The valve may be closed by a device of the kind disclosed in Specification 721,335. The pressure liquid is supplied by a pump 8 which is running continuously, the liquid being by-passed through a pipe 12 by a valve 13 when the piston has been raised. The pump may be of the constant delivery or variable delivery type. A spring-loaded accumulator piston 18 in the supply pipe 7 acts as a shock-absorber. The return shut-off valve 20 is of large bore so as to allow the hammer head to drop freely; a release valve 22 of small bore allows the hammer to fall slowly. Air is compressed in the top of the cylinder to cushion the upstroke. A vacuum is prevented from occurring in each end of the working cylinder 1 by valves 6, 24. A spring may be compressed by the piston during its upstroke.
GB25819/52A 1951-10-29 1952-10-15 Improvements in hydraulic drop hammers Expired GB729941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE729941X 1951-10-29

Publications (1)

Publication Number Publication Date
GB729941A true GB729941A (en) 1955-05-11

Family

ID=6636066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25819/52A Expired GB729941A (en) 1951-10-29 1952-10-15 Improvements in hydraulic drop hammers

Country Status (1)

Country Link
GB (1) GB729941A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827764A (en) * 1955-12-13 1958-03-25 L A Young Spring & Wire Corp Power system for a drop hammer
US2951334A (en) * 1956-10-09 1960-09-06 Philips Corp Thermo-dynamic reciprocating apparatus
US2982088A (en) * 1956-10-09 1961-05-02 Philips Corp Gas leakage prevention means for hot gas reciprocating apparatus
US3194049A (en) * 1961-10-19 1965-07-13 Eumuco Ag Fur Maschb Top-pressure forging hammer
US3267677A (en) * 1963-05-09 1966-08-23 Leo C Bollar Impact forming machine
US3412554A (en) * 1965-05-05 1968-11-26 Inst Gidrodinamiki Sibirskogo Device for building up high pulse liquid pressures
US3509723A (en) * 1968-08-05 1970-05-05 Arrow Mfg Co Gas-powered impact hammer
US3638423A (en) * 1969-04-24 1972-02-01 Ihc Holland Nv Pneumatic tool
US3704878A (en) * 1971-03-18 1972-12-05 Owens Corning Fiberglass Corp Method and apparatus for reducing torque changes in rock shafts
US3727726A (en) * 1969-09-26 1973-04-17 K Nauen Method of and device for operating appliances having driven masses

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827764A (en) * 1955-12-13 1958-03-25 L A Young Spring & Wire Corp Power system for a drop hammer
US2951334A (en) * 1956-10-09 1960-09-06 Philips Corp Thermo-dynamic reciprocating apparatus
US2982088A (en) * 1956-10-09 1961-05-02 Philips Corp Gas leakage prevention means for hot gas reciprocating apparatus
US3194049A (en) * 1961-10-19 1965-07-13 Eumuco Ag Fur Maschb Top-pressure forging hammer
US3267677A (en) * 1963-05-09 1966-08-23 Leo C Bollar Impact forming machine
US3412554A (en) * 1965-05-05 1968-11-26 Inst Gidrodinamiki Sibirskogo Device for building up high pulse liquid pressures
US3509723A (en) * 1968-08-05 1970-05-05 Arrow Mfg Co Gas-powered impact hammer
US3638423A (en) * 1969-04-24 1972-02-01 Ihc Holland Nv Pneumatic tool
US3727726A (en) * 1969-09-26 1973-04-17 K Nauen Method of and device for operating appliances having driven masses
US3704878A (en) * 1971-03-18 1972-12-05 Owens Corning Fiberglass Corp Method and apparatus for reducing torque changes in rock shafts

Similar Documents

Publication Publication Date Title
GB1110622A (en) Percussion apparatus
GB729941A (en) Improvements in hydraulic drop hammers
GB1226837A (en)
GB352408A (en) Improvements in hydraulic mechanism for driving a reciprocating member
GB1294523A (en) Vibration damper
GB941753A (en) Improvements in method and apparatus for tightening bolts or nuts to a desired degree of tightness by means of an impact wrench
GB687049A (en) Improvements in or relating to a direct acting hydraulic shock absorber
GB711704A (en) Improvements in or relating to hydraulic accumulators
GB724062A (en) Improvements in and relating to hydraulic jacks
GB437980A (en) Improvements relating to lubricant pumps for metal cutting machines
GB737045A (en) Improvements in or relating to manually-operated hydraulic jacks
GB653286A (en) Improvements in or relating to hydraulic shock absorbers
GB767167A (en) Improvements in distributing valve means for elastic pressure fluid driven percussion tools
GB641997A (en) Improvements in or relating to apparatus for applying predetermined loads to objectsfor testing hardness and other purposes
GB769308A (en) Improvements relating to pressure controlling or cushioning appliances
GB647808A (en) Improvements in or relating to check valves
GB446036A (en) Improvements in or relating to percussive tools actuated by compressed air
GB1344182A (en) Percussive implement
GB884526A (en) Improvements in or relating to fluid operated compressing tools
GB578321A (en) Improvements in or relating to pressure regulating devices for fluid supply systems
GB512675A (en) Improvements in or relating to automatic output regulating devices for piston type compressors
GB594595A (en) Hydraulic pressure generating apparatus
GB757723A (en) Improvements in or relating to hydraulic presses
GB455678A (en) Improved lubricating pump
GB794955A (en) Improvements in or relating to pneumatic rock or coal drills