GB1387381A - Rotary positive-displacement fluid motor - Google Patents

Rotary positive-displacement fluid motor

Info

Publication number
GB1387381A
GB1387381A GB198973A GB198973A GB1387381A GB 1387381 A GB1387381 A GB 1387381A GB 198973 A GB198973 A GB 198973A GB 198973 A GB198973 A GB 198973A GB 1387381 A GB1387381 A GB 1387381A
Authority
GB
United Kingdom
Prior art keywords
piston
fluid
bore
chamber
chambers
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
GB198973A
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.)
Gardner Denver Inc
Original Assignee
Gardner Denver Inc
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 Gardner Denver Inc filed Critical Gardner Denver Inc
Publication of GB1387381A publication Critical patent/GB1387381A/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
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Motors (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Rotary Pumps (AREA)

Abstract

1387381 Percussive tools GARDNERDENVER CO 15 Jan 1973 [11 July 1972] 1989/73 Heading B4C [Also in Division F1] In an hydraulic percussion apparatus a member 52 is struck by a portion 50 of a piston 44, which is propelled by a cam surface 104 on a rotary member 102 through a valve member 36, a piston 32, hydraulic fluid trapped in a bore 26, and a portion 58 of the piston 44. The member 102 is a part of a gerotor-type hydraulic motor 70 and is supported by end plates 108, 110 on roller bearings 118. Rotation of the member 102 is effected by a gear 92 revolving therein in a planetary manner relative to a fixed gear 84 when pressurized hydraulic fluid is supplied through a port 82 to chambers between the gears. The spent fluid is discharged through chambers 27, 15 and a port 138. The valve member 36 is biased towards the surface 104 by a spring 34 and has guides 42, which permit it to slide in the piston 32 and when it is raised with respect to said piston, Figs. 5 and 6 (not shown), allow fluid in the chamber 27 to enter the bore 26. To limit the downward stroke of the piston 44 passages 30 let fluid in the bore 26 escape when exposed by the portion 58. A one-way seal 62 ensures cushioning of the piston 44 by atmospheric air that enters the lower portion 47 of a chamber 46 through grooves 64 and maintains a negative pressure in the upper portion of said chamber so as to produce the return stroke of this piston.
GB198973A 1972-07-11 1973-01-15 Rotary positive-displacement fluid motor Expired GB1387381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27077772A 1972-07-11 1972-07-11

Publications (1)

Publication Number Publication Date
GB1387381A true GB1387381A (en) 1975-03-19

Family

ID=23032763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB198973A Expired GB1387381A (en) 1972-07-11 1973-01-15 Rotary positive-displacement fluid motor

Country Status (8)

Country Link
US (1) US3791149A (en)
JP (1) JPS5420036B2 (en)
AU (1) AU5133273A (en)
CA (1) CA966744A (en)
FR (1) FR2192615A5 (en)
GB (1) GB1387381A (en)
SE (1) SE379829B (en)
ZA (1) ZA73353B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102534A (en) * 1977-01-10 1978-07-25 Ajax Tool Works, Inc. Pneumatic hammer
JPS5990788A (en) * 1982-11-16 1984-05-25 Sumitomo Electric Ind Ltd Rotary pump
US6082986A (en) * 1998-08-19 2000-07-04 Cooper Technologies Reversible double-throw air motor
GB9902793D0 (en) * 1999-02-09 1999-03-31 Black & Decker Inc Rotary hammer
US6241500B1 (en) 2000-03-23 2001-06-05 Cooper Brands, Inc. Double-throw air motor with reverse feature
DE102009054636A1 (en) * 2009-12-15 2011-06-16 Robert Bosch Gmbh Hand tool
US8733610B2 (en) * 2012-08-21 2014-05-27 Tricord Solutions, Inc. Fastener driving apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140586A (en) * 1960-09-19 1964-07-14 Joelson Karl-Evert Anders Hydraulically operated apparatus
US3112677A (en) * 1962-02-09 1963-12-03 Hartmann Mfg Company Hydrodynamic unit
US3215043A (en) * 1962-08-30 1965-11-02 Mortimer J Huber Hydraulic torque motors
BE652171A (en) * 1963-08-21
DE1451716A1 (en) * 1964-06-13 1969-05-29 Georg Dirnberger Rotary piston engine with planetary arranged runners
US3453966A (en) * 1967-05-04 1969-07-08 Reliance Electric & Eng Co Hydraulic motor or pump device
US3574490A (en) * 1969-05-21 1971-04-13 Koehring Co Fluid pump or motor having rollers

Also Published As

Publication number Publication date
JPS4957236A (en) 1974-06-04
AU5133273A (en) 1974-07-25
SE379829B (en) 1975-10-20
US3791149A (en) 1974-02-12
FR2192615A5 (en) 1974-02-08
JPS5420036B2 (en) 1979-07-19
CA966744A (en) 1975-04-29
ZA73353B (en) 1973-11-28

Similar Documents

Publication Publication Date Title
GB1296924A (en)
CA1037352A (en) Impact tool
GB1389803A (en) Impact tool
GB1316908A (en) Hammer drill
GB1087180A (en) Fluid pressure actuated device
US4114699A (en) Pneumatic rotary hammer device
GB1387381A (en) Rotary positive-displacement fluid motor
GB945288A (en) Improvements in hydraulically actuated reciprocable tools
GB1532532A (en) Hydraulic rotary device
GB957204A (en) Improvements in percussion tools
GB1282615A (en) Submersible percussion hammer
GB1515518A (en) Hydraulically powered hammer
SE8205029L (en) HYDRAULIC DRIVE FORM AND RETURN MACHINE
GB1359717A (en) Rock drill
GB1299003A (en) Reciprocating fluid pressure operated motor
DE3781099D1 (en) DRAWING DEVICE FOR A PRESS.
ES367756A1 (en) Pneumatic piston return system for impact tools
FR2302425A1 (en) High pressure membrane pump - is driven via a crank piston and hydraulic oil supply (HU280775)
GB1338508A (en) Semirotary positive-displacement fluid machine
GB1209489A (en) Improvements in or relating to fluid-operated percussive tools
GB1339934A (en) Hydraulic press
GB1405856A (en) Portable reciprocating type filing machine
ES430807A1 (en) Hydraulic mechanism, such as a motor or a pump, having radial pistons adapted to perform a plurality of strokes per revolution
GB1252001A (en)
US3762278A (en) Pulse piston drive

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees