GB1421839A - - Google Patents

Info

Publication number
GB1421839A
GB1421839A GB3103973A GB3103973A GB1421839A GB 1421839 A GB1421839 A GB 1421839A GB 3103973 A GB3103973 A GB 3103973A GB 3103973 A GB3103973 A GB 3103973A GB 1421839 A GB1421839 A GB 1421839A
Authority
GB
United Kingdom
Prior art keywords
piston
ports
housing portion
plunger
chamber
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
GB3103973A
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 filed Critical
Publication of GB1421839A publication Critical patent/GB1421839A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L15/00—Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups F01L17/00 - F01L29/00
    • F01L15/14—Arrangements with several co-operating main valves, e.g. reciprocatory and rotary
    • F01L15/16—Arrangements with several co-operating main valves, e.g. reciprocatory and rotary with reciprocatory slide valves only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L21/00—Use of working pistons or pistons-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
    • F01L21/04—Valves arranged in or on piston or piston-rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
    • F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/007—Reciprocating-piston liquid engines with single cylinder, double-acting piston
    • F03C1/0073—Reciprocating-piston liquid engines with single cylinder, double-acting piston one side of the double-acting piston being always under the influence of the liquid under pressure
    • F03C1/0076—Reciprocating-piston liquid engines with single cylinder, double-acting piston one side of the double-acting piston being always under the influence of the liquid under pressure the liquid under pressure being continuously delivered to one cylinder chamber through a valve in the piston for actuating the return stroke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/04—Liquid operated

Abstract

1421839 Percussive tools IMPULSE PRODUCTS CORP 29 June 1973 [10 Aug 1972] 31039/73 Heading B4C In a fluid powered device such as an impact ram 10, the control for operating the plunger 16 of the ram comprises a valve arrangement operative in response to the admittance of pressure fluid to cause a portion 72 of the housing 14 to become charged to a predetermined pressure level, operative to hold a triggering chamber 36 open to venting via passages 50, 52 and 54 until the predetermined pressure is reached, and operative to close off the venting and direct the pressure fluid from the housing portion to the triggering chamber when the predetermined pressure is reached to cause movement of the plunger. As shown, hydraulic fluid admitted via a port 66 to the housing portion 72 acts on a piston 18 to compress gas contained in a chamber 20 of the plunger 16. While the piston 18 moves down a poppet valve 48 is in its lower position to vent the triggering chamber 36 to the passage 54, Fig. 2 (not shown). The housing portion 72 becomes charged to the predetermined pressure during the downward movement of the piston 18 and when lateral ports 64 in a hollow piston probe 38 are exposed below a housing part 42, Fig. 3 (not shown) the hydraulic fluid passes through the ports to lift and seat the poppet valve 48 into its vent closing position and to pass through ports 62 into the triggering chamber 36 and act on the end surface 32 of the plunger 16 to drive the latter on its working stroke. To ensure continuous recycling the underside of the housing part 42 has projecting pins (110) Figs. 7 to 9 (not shown) which contact the piston (18) on its return stroke and cause a floating ring (28) to break sealing contact at (A) with the piston and make sealing contact at (B) with a seat (44) of the housing part (42). A fitting 24 is used to charge the required amount of gas in the chamber 20. In a second embodiment, Figs. 4 to 6 (not shown) a pipe (80) is connected to the vent outlet for hydraulic fluid, the housing portion (72<SP>1</SP>) is charged through a pipe (84) and passages (86, 76), the lateral ports (64) are provided in the poppet valve (48<SP>1</SP>) instead of in the piston probe (38<SP>1</SP>) and relieved surfaces (88, 90 and 92) define an annular passage about the piston probe to communicate the housing portion (72<SP>1</SP>) with the ports (64).
GB3103973A 1972-08-10 1973-06-29 Expired GB1421839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00279694A US3822633A (en) 1972-08-10 1972-08-10 Control means for a fluid-powered device

Publications (1)

Publication Number Publication Date
GB1421839A true GB1421839A (en) 1976-01-21

Family

ID=23070036

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3103973A Expired GB1421839A (en) 1972-08-10 1973-06-29
GB2411175A Expired GB1421840A (en) 1972-08-10 1973-06-29 Valving means for controlling fluid through a passageway

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2411175A Expired GB1421840A (en) 1972-08-10 1973-06-29 Valving means for controlling fluid through a passageway

Country Status (9)

Country Link
US (1) US3822633A (en)
JP (1) JPS4963881A (en)
AU (1) AU470439B2 (en)
CA (1) CA1005292A (en)
DE (1) DE2336938A1 (en)
FR (1) FR2195755B1 (en)
GB (2) GB1421839A (en)
SE (1) SE397116B (en)
ZA (1) ZA735258B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269382A (en) * 1992-05-08 1993-12-14 Esco Corporation Impact device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157121A (en) * 1977-02-04 1979-06-05 Chicago Pneumatic Tool Co. Hydraulic powered rock drill
US5626068A (en) * 1994-04-12 1997-05-06 White Manufacturing (Proprietary) Limited Hydraulic reciprocating mechanism
US6155353A (en) * 1999-07-23 2000-12-05 Ottestad; Jack B. Impact tool
DE602004010181T2 (en) * 2003-12-19 2008-09-11 Clark Equipment Company IMPACT TOOL

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US343569A (en) * 1886-06-15 coopee
US1157924A (en) * 1915-07-21 1915-10-26 Charles Christiansen Pneumatic tool.
US3137483A (en) * 1958-01-24 1964-06-16 Zinkiewicz Wiktor Ground burrowing device
US3524385A (en) * 1966-07-11 1970-08-18 Impulse Prod Corp Control means for fluid-powered devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269382A (en) * 1992-05-08 1993-12-14 Esco Corporation Impact device

Also Published As

Publication number Publication date
SE397116B (en) 1977-10-17
US3822633A (en) 1974-07-09
JPS4963881A (en) 1974-06-20
FR2195755B1 (en) 1978-12-29
FR2195755A1 (en) 1974-03-08
CA1005292A (en) 1977-02-15
AU470439B2 (en) 1976-03-18
DE2336938A1 (en) 1974-02-28
GB1421840A (en) 1976-01-21
ZA735258B (en) 1974-07-31
AU5796773A (en) 1975-01-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee