US1640620A - Governor for pressure-fluid-operated tools - Google Patents

Governor for pressure-fluid-operated tools Download PDF

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Publication number
US1640620A
US1640620A US53241A US5324125A US1640620A US 1640620 A US1640620 A US 1640620A US 53241 A US53241 A US 53241A US 5324125 A US5324125 A US 5324125A US 1640620 A US1640620 A US 1640620A
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Prior art keywords
pressure
governor
valve
fluid
casing
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Expired - Lifetime
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US53241A
Inventor
Ernest H Shaff
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WILLIAM H KELLER Inc
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WILLIAM H KELLER Inc
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Priority to US53241A priority Critical patent/US1640620A/en
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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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K2200/00—Details of valves
    • F16K2200/40—Bleeding means in closed position of the valve, e.g. bleeding passages
    • F16K2200/401—Bleeding means in closed position of the valve, e.g. bleeding passages arranged on the closure member
    • 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
    • Y10S137/00—Fluid handling
    • Y10S137/903—Rubber valve springs
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7847—With leak passage
    • Y10T137/7848—Permits flow at valve interface

Definitions

  • rIhe invention relates generally to automatic governors and more particularly to governors for pressure fluid operated tools, such as pneumatic grinders, drills, etc.
  • Cork is practically unaffected by such fluids.
  • a block of cork if compressed lon-l gitudinally until its length lis reduced to about one-tenth ofthe original length does not increase -appreciably in cross section. ⁇
  • the cork Upon release the cork will expand longitudinally to ⁇ about three-quartersof its orig-V inallength with the new characteristic that it is softer ⁇ than before and resilient but longitudinally only, that is, aftersuch treatment the cork may be compressed longitudinally under fairly low pressure while it re-l ⁇ tains its original rigidity'transversely. y It is possible to repeatedly compress and release the cork manytimes withoutlosing this resiliency. If placed in a container and sub-v in a transverse direction. Y
  • a governor comprising a casing having a pressure fluid passagev therethrough controlled by a valve which. has an actuating element ,of cork.
  • valve being arranged normally to permit a relatively small amount of pressure fluidto pass through the casing, but, uponincrease of back pressure in the vvalve 'chamber such as occurs when a load is applied to the tool, being adapted automatically to permit increasing quantities of pressure fluid to flow as the load increases.
  • Figure 1 is a central longitudinal sectiony illustrating one form of the invention. i
  • Fig. 2 l is a central longitudinal section of the valve and mounting therefor.
  • Fig. 3 is a view looking at the left end of Fig. l.
  • Fig.v 4 is a View looking at the left end of Fig. 2.
  • Fig. 5 is a sectional view along line 5 5 of Fig. l. y' n Vhile I have shown inthe drawings and will'herein describe in detail the preferred embodiment of my invention, it is to be understood that I do not thereby intend'to j limit the invention to the specific form dis- In the exemplary form illustrated, the
  • governor l comprises, a casing l adapted to be connected in a pressure fluid supply line (not shown), this casing being herein shown as composedof two ⁇ sections 2 and Shaving abut-ting shoulders 4 and 5 held in air-tight engagementby means of the screw-threaded portions 6 and 7 of the sections.
  • the sec-V tion 2 is'k also screw threaded at f8V andy the,
  • the right hand end 3a is the normal intake end of the governor.
  • a hollow cup-shaped plug 10 is suitably mounted in thecasing section 3, 'the plug herein shown being a Vpress fit.
  • This plu@ hask openings 11 in the wall thereof to esta lish communication between the chamber Hand the.
  • a block of cork ⁇ 16 treatedA as hereinbefore described is mounted as by means of a suitable cement, With one end in the valve member 13 and the other end in a cup-shaped portion 17 of a valve mounting ⁇ member 1'8f V
  • This member 18 comprises a threaded flange portion 19, in engagement With the threaded portion 7 of the casing section 3 to permit of longitudinal 4adjustment therein, and the cup-shaped portion 17 hereinbeforementioned.
  • the flangedportion 19 are provided passageways 2O to establish communication between the valve chamber 12 and the outlet bore 21 of the casing section 2.
  • valve member 13 has a vent- 22 therethrough toieq-ualize, 'at all times, the pressure in the chamber formed between the said valve member and the plug 15 andthe pressure in the valve chamber 12.
  • the Wall 14 is adapted to limit the movement .ofthevalve in closing the openings 11, so that With the surface of the Wall contactingthe plug 10 a sufficient portion of the openings 11 remains uncovered to permit thepassage of pressure fluid to operate a tool when idling.
  • the mounting member 418 has a disanietrical groove 23 therein adaptedto be engaged by a screvv driver to facilitate adjustment of theentire valve structure longitudinally of the casing when it isdesred to adjustthe Inormal position of the valveor to increase or ⁇ decreaseithe pressure vWhich the lvalve 13 normally exerts on the plug E1 0.
  • VVhena load is applied to the tool thespeed of the tooldecreases and the Pressure Yin the valve chamber iincreases until it V is suflicient to ,compress the cork 16 longitudinallyto operate the valve 113 ,and thereby permit .increased Aquantities of pressure 'fluid to pass ⁇ through the gov ernor.
  • a governor of the character described having, in combination, a casing, a cupshaped plugmounted at one end thereof and having an aperturetherein to permit flow of pressure iluid therethrough, a valve y guided by Asaid plug and normally tending to close said aperture, means to operate said valve comprising a longitudinally ,resilient Y ,the pressure of the pressure fluid to open saidV valve, and means for adjusting the normal position ofisaid valve.
  • a governor of the character described having, in combination, a casing having a 4passage ,to permit flowof pressure fluid therethrough and .a valve device adapted normally to restrict said passage, said valve device comprising a block of corlrprevious- Vly compressed longitudinally to approximately one-tenth its orioinallength.
  • A;governor of the character described having, ⁇ in combination, ⁇ a casing and a lon-V gitudinally resilient cork mounted thereinV and carrying a valve to control the flow of fluid through the casing.
  • a governor of the character describedy having, in combination, a casing and means therein carrying a valve to control the flow of'fluid through the casing, said ⁇ means com- ,prising a solid block of material compressi- 'ble longitudinally but vrelatively non-comrressible .transversely V'In testimony ⁇ vhei 'eof, l have hereunto affixed my signature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Valve Housings (AREA)

Description

Aug.` 30, 1927-. 1,640,620
E; H. SHAFF GGVERNOR FOR PRESSURE FLUID OPERATED TOOLS Filed Aug. 29, 1925 lfm/MMM' wwf Patented Aug. 30, 1927.
uNiTEn STATES PATENT OFFICE.
ERNEST H. SHAFF, OF GRAND HAVEN, IYIICHIGAN,-ASSIGNOR TO WILLIAM H. KELLER,
INC., OF GRAND HAVEN, MICHIGAN, A CORPORATION OF MICHIGAN.
GOVERNOR FOR FRESUItEMFLUID'OPEBATED TOOLS.
Application filled. August 29, 1925. Serial No. 53,241.
rIhe invention relates generally to automatic governors and more particularly to governors for pressure fluid operated tools, such as pneumatic grinders, drills, etc.
In the pressure fluid supply line of a tool of y this type it is desirable `to, have an automatic governor which will pass arelatively small quantity of pressure fluid to the tool when the tool is idling7 or running light, thereby preventing excessive speed of the tool and waste of pressurerfluid; but which, upon `application of a load to the tool automatically will pass relatively larger quantitiesof pressure fluid as the load increases.
It is t-he general vobjectfof the invention to provide anew and improved governor of simple construction which rwill afford such control for a pressure fluid operated tool.
In order that' a governor of this type shall operate efiiciently it is necessary that the internal mechanism, which is normallyin contact with the pressure fluid, be composed of materials lunaffected by steam, oil or other fluidsordinarily encountered in devices of this kind and be of such construction as to be free to operate even though foreign matter should collect thereon.: It is another object of the invention to produce a governor which incorporates anactuating element embodying these features.
Cork is practically unaffected by such fluids. A block of cork, if compressed lon-l gitudinally until its length lis reduced to about one-tenth ofthe original length does not increase -appreciably in cross section.`
Upon release the cork will expand longitudinally to `about three-quartersof its orig-V inallength with the new characteristic that it is softer` than before and resilient but longitudinally only, that is, aftersuch treatment the cork may be compressed longitudinally under fairly low pressure while it re-l `tains its original rigidity'transversely. y It is possible to repeatedly compress and release the cork manytimes withoutlosing this resiliency. If placed in a container and sub-v in a transverse direction. Y
It is a further object of the invention to Yincorporate a block of cork as the actuating element of a lvalve'in a governor for pres 'sure Huid operated tools, the cork having first heen treated as described above. .In pursuance of the foregoing objectsfa I aim'to provide an improved governor comprising a casing having a pressure fluid passagev therethrough controlled by a valve which. has an actuating element ,of cork. treated in this manner, the valve being arranged normally to permit a relatively small amount of pressure fluidto pass through the casing, but, uponincrease of back pressure in the vvalve 'chamber such as occurs when a load is applied to the tool, being adapted automatically to permit increasing quantities of pressure fluid to flow as the load increases. L
Furtherobjects and advantages will become apparent as the description proceeds.
In the drawings: v v
Figure 1 is a central longitudinal sectiony illustrating one form of the invention. i
Fig. 2 lis a central longitudinal section of the valve and mounting therefor.
Fig. 3 is a view looking at the left end of Fig. l.
' Fig.v 4: is a View looking at the left end of Fig. 2.
Fig. 5 is a sectional view along line 5 5 of Fig. l. y' n Vhile I have shown inthe drawings and will'herein describe in detail the preferred embodiment of my invention, it is to be understood that I do not thereby intend'to j limit the invention to the specific form dis- In the exemplary form illustrated, the
governor lcomprises, a casing l adapted to be connected in a pressure fluid supply line (not shown), this casing being herein shown as composedof two` sections 2 and Shaving abut-ting shoulders 4 and 5 held in air-tight engagementby means of the screw-threaded portions 6 and 7 of the sections. The sec-V tion 2 is'k also screw threaded at f8V andy the,
section 3 at` 9 to readily permit coupling of thel casing in a pressure fluid supply line.
As viewed in Fig. 1, the right hand end 3a is the normal intake end of the governor. At this end a hollow cup-shaped plug 10 is suitably mounted in thecasing section 3, 'the plug herein shown being a Vpress fit. This plu@ hask openings 11 in the wall thereof to esta lish communication between the chamber Hand the. intake end ythe gVIIlOi erating this valve a block of cork`16 treatedA as hereinbefore described is mounted as by means of a suitable cement, With one end in the valve member 13 and the other end in a cup-shaped portion 17 of a valve mounting` member 1'8f VThis member 18 comprises a threaded flange portion 19, in engagement With the threaded portion 7 of the casing section 3 to permit of longitudinal 4adjustment therein, and the cup-shaped portion 17 hereinbeforementioned. ln the flangedportion 19 are provided passageways 2O to establish communication between the valve chamber 12 and the outlet bore 21 of the casing section 2.
In thefform illustrated the valve member 13 has a vent- 22 therethrough toieq-ualize, 'at all times, the pressure in the chamber formed between the said valve member and the plug 15 andthe pressure in the valve chamber 12. The Wall 14 is adapted to limit the movement .ofthevalve in closing the openings 11, so that With the surface of the Wall contactingthe plug 10 a sufficient portion of the openings 11 remains uncovered to permit thepassage of pressure fluid to operate a tool when idling. The mounting member 418 has a disanietrical groove 23 therein adaptedto be engaged by a screvv driver to facilitate adjustment of theentire valve structure longitudinally of the casing when it isdesred to adjustthe Inormal position of the valveor to increase or `decreaseithe pressure vWhich the lvalve 13 normally exerts on the plug E1 0.
lin operation, With the end 3 ofithe governor Vconnected, to the ypressure fluid supply line and the other end connectedtoa pressureffluid oper-ated tool, the, Smallamount of pressure fluidl permitted to passl through the openings y11 -ivith the valve 13 in its closed position is predetermined and is designed to operate the tool lat anidling speed, i. e., a safe speed Withpno load on the tool. Under such vconditions the pressure required tooperate the ltoolis very: Smallso that the pressure inthe valve. chamber 1 2 is' butl slightly aboveatmospheric. VVhena loadis applied to the tool thespeed of the tooldecreases and the Pressure Yin the valve chamber iincreases until it V is suflicient to ,compress the cork 16 longitudinallyto operate the valve 113 ,and thereby permit .increased Aquantities of pressure 'fluid to pass `through the gov ernor.
-From the foregoing it will be apparent tliatlhave,provided agovernor for pressurefluid Qperated-.tools of simple and improved construction wherein there are no closely fitted sliding surfaces to be affected by deposits of foreign matter, which has a valve actuating'device that is unaffected by moisture, oils, etc., and which automaticallv vvill oermit increasino` uantities ofV pressurefluid to flow through the governor to a tool as the load upon the'tool increases.
I claim asmy invention:
1. A governor of the character described "having, in combination, a casing, a cupshaped plugmounted at one end thereof and having an aperturetherein to permit flow of pressure iluid therethrough, a valve y guided by Asaid plug and normally tending to close said aperture, means to operate said valve comprising a longitudinally ,resilient Y ,the pressure of the pressure fluid to open saidV valve, and means for adjusting the normal position ofisaid valve.
A governor of the character described having, in combination, a casing having a 4passage ,to permit flowof pressure fluid therethrough and .a valve device adapted normally to restrict said passage, said valve device comprising a block of corlrprevious- Vly compressed longitudinally to approximately one-tenth its orioinallength.
1. A;governor of the character described having,` in combination, `a casing and a lon-V gitudinally resilient cork mounted thereinV and carrying a valve to control the flow of fluid through the casing.
5. A governor of the character describedy having, in combination, a casing and means therein carrying a valve to control the flow of'fluid through the casing, said` means com- ,prising a solid block of material compressi- 'ble longitudinally but vrelatively non-comrressible .transversely V'In testimony `\vhei 'eof, l have hereunto affixed my signature.
YERNEST H- SHAFF
US53241A 1925-08-29 1925-08-29 Governor for pressure-fluid-operated tools Expired - Lifetime US1640620A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584979A (en) * 1948-09-24 1952-02-12 Bassinger Ross Percussion tool
US3028877A (en) * 1957-05-02 1962-04-10 John W Thieme Pressure and flow control valve
US3192949A (en) * 1962-07-10 1965-07-06 Halkey Roberts Corp Spring biased check valve
US3989061A (en) * 1975-06-02 1976-11-02 The Continental Group, Inc. Cylindrical pressure regulator
US5211192A (en) * 1991-11-14 1993-05-18 Jorgensen William F Pneumatic pressure relief assembly
WO2014126865A1 (en) * 2013-02-13 2014-08-21 Becton, Dickinson And Company Septum actuator with insertion depth limiter and compression compensator
US9381320B2 (en) 2013-03-18 2016-07-05 Becton, Dickinson And Company Multiple-use intravenous catheter assembly septum and septum actuator

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584979A (en) * 1948-09-24 1952-02-12 Bassinger Ross Percussion tool
US3028877A (en) * 1957-05-02 1962-04-10 John W Thieme Pressure and flow control valve
US3192949A (en) * 1962-07-10 1965-07-06 Halkey Roberts Corp Spring biased check valve
US3989061A (en) * 1975-06-02 1976-11-02 The Continental Group, Inc. Cylindrical pressure regulator
US5211192A (en) * 1991-11-14 1993-05-18 Jorgensen William F Pneumatic pressure relief assembly
US5331999A (en) * 1991-11-14 1994-07-26 Jorgensen William F Pneumatic pressure relief assembly
WO2014126865A1 (en) * 2013-02-13 2014-08-21 Becton, Dickinson And Company Septum actuator with insertion depth limiter and compression compensator
US9320881B2 (en) 2013-02-13 2016-04-26 Becton, Dickinson And Company Septum actuator with insertion depth limiter and compression compensator
US9764125B2 (en) 2013-02-13 2017-09-19 Becton, Dickinson And Company Septum actuator with insertion depth limiter and compression compensator
EP3626303A1 (en) * 2013-02-13 2020-03-25 Becton, Dickinson and Company Septum actuator with insertion depth limiter and compression compensator
US9381320B2 (en) 2013-03-18 2016-07-05 Becton, Dickinson And Company Multiple-use intravenous catheter assembly septum and septum actuator
US9750920B2 (en) 2013-03-18 2017-09-05 Becton, Dickinson And Company Multiple-use intravenous catheter assembly septum and septum actuator
US11478610B2 (en) 2013-03-18 2022-10-25 Becton, Dickinson And Company Multiple-use intravenous catheter assembly septum and septum actuator

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