GB525773A - Improvements in pneumatic hammers - Google Patents

Improvements in pneumatic hammers

Info

Publication number
GB525773A
GB525773A GB6597/39A GB659739A GB525773A GB 525773 A GB525773 A GB 525773A GB 6597/39 A GB6597/39 A GB 6597/39A GB 659739 A GB659739 A GB 659739A GB 525773 A GB525773 A GB 525773A
Authority
GB
United Kingdom
Prior art keywords
valve
cylinder
head
stroke
modification
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
GB6597/39A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB525773A publication Critical patent/GB525773A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/08—Means for driving the impulse member comprising a built-in air compressor, i.e. the tool being driven by air pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

525,773. Pneumatic hammers. MAIRE, C. A., and BOURSET, R.A. Feb. 28, 1939, No. 6597. Convention date, March 1, 1938. [Class 124] In a portable or other pneumatic hammer in which a striking piston 7 is returned by a spring 8, the piston performs only a single operative stroke for each actuation of a manual control valve 13. The head 9 of the hammer is slidably mounted between stops 20, 21 on the cylinder 1, and compressed air or other fluid is continuously supplied by a conduit 12 which may be fitted with a flow-controlling cock. A partition 14 divides the head 9 into two chambers 10,11 and is formed with a sleeve 15 to accommodate the tubular slide valve 13, a spring 19 being mounted between the closed end 16 of the valve and the head 9. The opposite open end 18 of the valve is tapered as at 30 to engage an orifice 6 in the end wall 5 of the cylinder when in operation. Tapering ports 17 in the valve are then uncovered, and compressed air passes into the cylinder. During the return stroke the expanded air escapes through one or more orifices 23 ; leakage apertures 24 also are provided in the valve. The power of each stroke is regulated by adjusting the quantity of compressed air admitted at each stroke. For this purpose the forward stop 21 for the head 9 is adjustable by means of a ring nut 25 carrying a stud 27 which engages in a notch 28 in the cylinder 1. For the same purpose the escape of air from the cylinder through orifices 22 may be controlled by means of a sliding ring 31. The admission orifices may also be controlled by means of a nut adjustably mounted on the valve. In one modification the end of the piston 7 has an extension which engages with play in the orifice 6, additional ports being provided i n the end wall 5 for engagement by the tapered end 30 of the valve. In a second modification a valve closed at both ends is mounted in a fixed head at right angles to the cylinder 1, and is operated by a pivoted handle. In a third modification the valve 13 is arranged parallel to the cylinder 1 and the head has a third chamber continuously connected to the second chamber.
GB6597/39A 1938-03-01 1939-02-28 Improvements in pneumatic hammers Expired GB525773A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR525773X 1938-03-01

Publications (1)

Publication Number Publication Date
GB525773A true GB525773A (en) 1940-09-04

Family

ID=8920270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6597/39A Expired GB525773A (en) 1938-03-01 1939-02-28 Improvements in pneumatic hammers

Country Status (1)

Country Link
GB (1) GB525773A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526380A (en) * 1948-02-24 1950-10-17 Albert L Mathews Tool for leveling protuberances in sheet metal
US3099186A (en) * 1960-07-21 1963-07-30 Cooper Bessemer Corp Marking device
US3305953A (en) * 1963-08-15 1967-02-28 Mehren Oswald Von Pneumatic tooth for earth excavator
US3613507A (en) * 1970-04-28 1971-10-19 United States Surgical Corp Powerpack unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526380A (en) * 1948-02-24 1950-10-17 Albert L Mathews Tool for leveling protuberances in sheet metal
US3099186A (en) * 1960-07-21 1963-07-30 Cooper Bessemer Corp Marking device
US3305953A (en) * 1963-08-15 1967-02-28 Mehren Oswald Von Pneumatic tooth for earth excavator
US3613507A (en) * 1970-04-28 1971-10-19 United States Surgical Corp Powerpack unit

Similar Documents

Publication Publication Date Title
US2607197A (en) Sequential motor operation under control of individual, fluid actuated, relieved pressure valves
GB974930A (en) Improvements in percussion tools
GB1106678A (en) Pneumatic nailing machine
GB525773A (en) Improvements in pneumatic hammers
US1361431A (en) Valve for pneumatic percussive tools
US1829246A (en) Percussive tool
GB525281A (en) Improvements in and relating to pneumatic hammers
GB529024A (en) Improvements in fluid pressure operated implement
US1931042A (en) Fluid pressure hammer
GB771269A (en) Hydraulic operator
GB225813A (en) Distributing valve for pneumatic hammers and other similar apparatus
GB605680A (en) Improvements in high speed reciprocating engines especially for fluid-pressure-operated hammers
GB338696A (en) Improvements in or relating to means for operating the distributing slide valve of pressure air operated hammers
US822146A (en) Pneumatic hammer.
GB485908A (en) Improvements in or relating to hydraulic or pneumatic control valves
GB311734A (en) Pneumatic hammer with tubular slide valve control
DE1623520U (en) KICK-FREE RIVET, CLEANING AND REMOVAL HAMMER.
GB341834A (en) Improvements in pneumatically actuated percussive tools
GB389318A (en) Improvements in pneumatic percussive tools
GB672963A (en) Improvements in, or relating to, valves
GB219050A (en) Improvements in or relating to hammers and the like actuated by elastic fluid
GB661396A (en) A portable pneumatic tool
GB660619A (en) Improvements in or relating to the cleaning of boilers and other apparatus
GB142922A (en) Improvements in or relating to percussive pneumatic hand tools
GB446208A (en) Improved pneumatic percussive tool