FR2255147A1 - Air cushion in impact press - is situated between piston and hammer top with vent connection to atmosphere - Google Patents

Air cushion in impact press - is situated between piston and hammer top with vent connection to atmosphere

Info

Publication number
FR2255147A1
FR2255147A1 FR7442475A FR7442475A FR2255147A1 FR 2255147 A1 FR2255147 A1 FR 2255147A1 FR 7442475 A FR7442475 A FR 7442475A FR 7442475 A FR7442475 A FR 7442475A FR 2255147 A1 FR2255147 A1 FR 2255147A1
Authority
FR
France
Prior art keywords
air cushion
atmosphere
cylinder
situated
piston
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
FR7442475A
Other languages
French (fr)
Other versions
FR2255147B1 (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.)
DUSS MASCHF
Original Assignee
DUSS MASCHF
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 DUSS MASCHF filed Critical DUSS MASCHF
Publication of FR2255147A1 publication Critical patent/FR2255147A1/en
Application granted granted Critical
Publication of FR2255147B1 publication Critical patent/FR2255147B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Abstract

The air cushion is limited by the face sides of the hammer tup, and the drive piston moves backwards and forwards during the striking cycle, and is located in a cylinder between the axially freely movable hammer tup and its drive piston connected to a crank arrangement. The air cushion is connected with the atmosphere via at least one vent aperture in the cylinder. These vents are located in the cylinder in the region of the rear edge of the hammer tup fitted with ring seals when in the striking position. At least in one of the vent apertures the air through flow is damped in relation to the possible through flow is dictated by the vent aperture's cross-section.
FR7442475A 1973-12-22 1974-12-23 Air cushion in impact press - is situated between piston and hammer top with vent connection to atmosphere Granted FR2255147A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732364236 DE2364236A1 (en) 1973-12-22 1973-12-22 IMPACT DEVICE

Publications (2)

Publication Number Publication Date
FR2255147A1 true FR2255147A1 (en) 1975-07-18
FR2255147B1 FR2255147B1 (en) 1978-10-13

Family

ID=5901743

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7442475A Granted FR2255147A1 (en) 1973-12-22 1974-12-23 Air cushion in impact press - is situated between piston and hammer top with vent connection to atmosphere

Country Status (4)

Country Link
CH (1) CH577368A5 (en)
DE (1) DE2364236A1 (en)
FR (1) FR2255147A1 (en)
NL (1) NL7416678A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316013A1 (en) * 1983-05-03 1984-11-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hammer drill with a pneumatically actuated percussion body
DE3515244A1 (en) * 1984-04-25 1985-10-31 Makita Electric Works Ltd., Anjo, Aichi PERFORMANCE TOOL
WO2000016949A1 (en) * 1998-09-23 2000-03-30 Wacker-Werke Gmbh & Co. Kg Tubular percussion power tool with pneumatic returning spring

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550725C3 (en) * 1975-11-12 1981-11-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hammer drill
DE2605998C3 (en) * 1976-02-14 1981-12-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Rotary hammer with drive and impact elements housed in a cylinder
US4113035A (en) * 1977-04-21 1978-09-12 Licentia Patent-Verwaltungs-G.M.B.H. Hammer drill with drive and percussion elements accommodated in a cylinder
US4336847A (en) * 1980-06-27 1982-06-29 Hitachi Koki Company, Limited Percussion drill
DE4239294A1 (en) * 1992-11-23 1994-05-26 Black & Decker Inc Hammer drill with pneumatic hammer mechanism
EP2213422B1 (en) * 2009-01-30 2011-10-05 HILTI Aktiengesellschaft Pneumatic impact mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316013A1 (en) * 1983-05-03 1984-11-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hammer drill with a pneumatically actuated percussion body
DE3515244A1 (en) * 1984-04-25 1985-10-31 Makita Electric Works Ltd., Anjo, Aichi PERFORMANCE TOOL
WO2000016949A1 (en) * 1998-09-23 2000-03-30 Wacker-Werke Gmbh & Co. Kg Tubular percussion power tool with pneumatic returning spring

Also Published As

Publication number Publication date
NL7416678A (en) 1975-06-24
CH577368A5 (en) 1976-07-15
DE2364236A1 (en) 1975-06-26
FR2255147B1 (en) 1978-10-13

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Legal Events

Date Code Title Description
ST Notification of lapse