US2845908A - Buffer mechanism - Google Patents

Buffer mechanism Download PDF

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Publication number
US2845908A
US2845908A US652506A US65250657A US2845908A US 2845908 A US2845908 A US 2845908A US 652506 A US652506 A US 652506A US 65250657 A US65250657 A US 65250657A US 2845908 A US2845908 A US 2845908A
Authority
US
United States
Prior art keywords
piston
tines
cylinder
barrel
tapered
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 - Lifetime
Application number
US652506A
Other languages
English (en)
Inventor
Karl W Maier
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.)
Olin Corp
Original Assignee
Olin Corp
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
Priority to BE566698D priority Critical patent/BE566698A/xx
Priority to DENDAT1073977D priority patent/DE1073977B/de
Application filed by Olin Corp filed Critical Olin Corp
Priority to US652506A priority patent/US2845908A/en
Priority to FR1200333D priority patent/FR1200333A/fr
Priority to CH5824458A priority patent/CH366007A/de
Priority to GB11790/58A priority patent/GB845483A/en
Application granted granted Critical
Publication of US2845908A publication Critical patent/US2845908A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the 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
    • Y10S30/00—Cutlery
    • Y10S30/04—Explosive
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17291—Resilient split socket
    • Y10T279/17376—Resilient member reinforced by another resilient member

Definitions

  • This invention relates to buffer mechanisms and deals 1n particular with such mechanisms adapted to soften or cushion impacts of bodies moving at ultra high velocities,
  • the resistance offered to a given design of slug or fastener varies over wide ranges from work piece to work piece; the resistance varies, in fact, from area to area in a given work piece.
  • a projectile driven into concrete meets a resistance different from the value of resistance encountered in wood or a cinder block.
  • resistance to a projectile may vary from area to area within a given slab
  • the piston utilized to drive a fastener arrives at the end of its stroke with a very considerable portion of its energy unconsumed.
  • a stud is driven into a work piece to a certain predetermined depth with an allowed maximum or minimum depth dening a tolerance.
  • overdrive is meant driving a stud or other projectile beyond the tolerable distance.
  • the buffer device of the presentl invention is effective to cushion exceedingly fast moving pistons within a relatively short distance and is thereby effective to regulate accurately the depth to which a fastener is driven.
  • Another object ofthe invention is the provision of a piston-cylinder arrangement in the above general class of devices where one end of the cylinder wall is provided with a plurality of radially disposed slots to define a plurality of tines or prongs and reinforcing the exterior of the cylinder in the Vicinity of the tines with a Winding or serving of ends of Fiberglas filament or yarn suitably bonded with plastic to define a collet.
  • a further object of the. present invention is the provision of a structure having the longitudinal strength or compressive resistance of a tube or cylinder While having radial resilience for bufferlng.
  • a buffer mechanism embodying certain features of the present invention maycomprise a tubular barrel member, a piston having a tapered contour disposed in the barrel and adapted to be driven along the longitudinal axis of the barrel in response to gas pressure, the forward end ofthe cylinder being formed with an internal tapered contour adapted to complement the tapered piston, the forward end of the cylinder wall being formed with a plurality of radially disposed grooves or slots for dividing the Wall into a plurality of tines, the interior tapered portion and the tines being so disposed that when the piston is advanced to bring the mating tapered portions into contact whereby the piston tends to spread the tines and a band of glass reinforced plastic disposed around the exterior of the tines effective to retain the tines against splitting.
  • Fig. l is a longitudinal sectional View of a buffer mechanism embracing the principles of the present invention.
  • the section is defined by a plane passing through the longitudinal axis of the mechanism and cutting a pair of opposed tines.
  • Fig. 2 is an end view of the left end of the device shown in Fig. l.
  • a piston 13 Disposed within the barrel and immediately ahead of the plug is a piston 13 having a base 14, a tapered neck 16 and a head 17.
  • a compression chamber designatedby the reference numeral 15 is bounded by the plug 11 and the base of the piston.
  • the piston is provided with a. suitable gas seal at the base and in theform of 'piston rings 18 and is adapted to move along the interior of the barrel in the direction shown by .the arrowuntilfthetaperedneck 16 encounters a mating tapered portion 19 formed on the interior of the barrel.
  • a.- suitable projectile such 1 as the stud 21 disposed in the boreof .the bar-relis driven into a work piece when theihead 117f strikesi'the' stud.
  • the forward portion ofiithe barrel or the left vrend,as viewed lin Fig. 1,.. is formedwith'aplurality of slots 22 so as to divide .the barrel intola plurality of prongs or tines 23.
  • thisfportion of the barrel may -be referred to hereinafter las 1a chuckl vor collet.
  • the chuck endof the Vbarrel is undercut to receive a winding or serving of strands or -iilaments of Fiberglas wrapped about the undercut-portion and-suitably impregnated with a plastic binder so as to form a composite band there around as indicated generally by the reference numeral 24. It is important that the strands ⁇ or laments of'Fiberglas wound or servedaround the exterior of the collet be so arranged that a bursting load tending to swell the tines or prongs outwardly willplacethe Fiberglas under a hoop stress or a tensile stress. By so disposing the ends of Fiberglas, it is possible to take advantage of the maximum tensile strength available Yin Fiberglas reinforced Yplastics which, as is'well known, is in excess of 200,000 lbs. per square inch.
  • Firing of the cartridge 12 by well known means will generate hot gases in the chamber 1 5 which rapidly expand to drive the piston to the left, las viewed in Fig. l, whereupon thehead 17 engages and moves the stud 21 out of the barrel anddrives it into a workpiece.
  • the tapered neck 16 and the mating tapered portion 19 of the barrel are sodisposed that upon a given length of stroke of thepiston the corresponding tapered portions engage one kanother to load the collet tending to move the tines outwardly in turn loading .the band 24.
  • the structural element of the band 24 is Fiberglas having a very high tensile/strength and a considerable elongation (more than 2%) a high energy .is readily absorbed by the band in swelling without exceeding the elastic limits of theFiberglas.
  • Self-releasing tapers may be selected effective to reduce thevelocity of impacting surfaces offpistontand -cylinder from 200 feet per second to as low as 50 feet per second.
  • a buffer mechanism forcushioning thetimpact of a piston colliding at an .ultra high velocity comprising-an apertured member for slidably receiving y,theltpistom a compression chamber within the member for applying fluid pressure to the base-of the piston to'drivethe piston,
  • a buffer mechanism for cushioning the impactof a piston colliding at -ultra ,high velocity comprising a tubular member forslidably receivingthe piston, a compression chamber within the tubular member for applying fluid pressure to the head of ⁇ the piston, one. endof said tubularmember. being formed rwith afplurality-of tines, the internal contour of the tubular member being formed with a tapered portion adaptedto mate Awith a corresponding .taperedportion formed onthefpiston and effective to spread the tines when thel piston .is driven in a direction which tends to bring theetapered, portions into engagement, a band of glass reinforced plastic.
  • a buierrnechanism.adapted-to cushion. .theimpact between a piston moving at an ultra high velocity u'pon collision with a piston cylinder wall comprising a cylinder having a compression chamber at one end thereof and a tapering internal contour at the other end thereof, the walls of said cylinder being formed with a plurality of radially disposed slots in the vicinity of said tapered portion and a composite band of glass reinforced plastic disposed about said cylinder in the area of said slots eifective to retain the slotted end of the cylinder against a bursting load.
  • a buffer mechanism adapted to cushion the impact between a piston moving at an ultra high velocity upon 6 collision with a piston cylinder wall comprising a cylinder having a compression chamber at one end thereof and an internal tapered portion generally defining a frustum of a cone in cross section at the other end thereof, the walls of said cylinder being formed with a plurality of radially disposed slots in the vicinity of said tapered portion and a composite band of glass reinforced plastic disposed about said cylinder in the area of said slots effective to retain the forward end of the cylinder against bursting, said glass taking the form of a circumferential winding of filaments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Actuator (AREA)
US652506A 1957-04-12 1957-04-12 Buffer mechanism Expired - Lifetime US2845908A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE566698D BE566698A (US20080293856A1-20081127-C00150.png) 1957-04-12
DENDAT1073977D DE1073977B (de) 1957-04-12 Arbeitsgerät dessen Kolben durch Pulvertreibstoffe oder ein gasformiges Druckmittel bewegt wird
US652506A US2845908A (en) 1957-04-12 1957-04-12 Buffer mechanism
FR1200333D FR1200333A (fr) 1957-04-12 1958-04-12 Dispositif amortisseur pour corps mus à des vitesses extrêmement élevées
CH5824458A CH366007A (de) 1957-04-12 1958-04-12 Puffereinrichtung
GB11790/58A GB845483A (en) 1957-04-12 1958-04-14 Buffer mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US652506A US2845908A (en) 1957-04-12 1957-04-12 Buffer mechanism

Publications (1)

Publication Number Publication Date
US2845908A true US2845908A (en) 1958-08-05

Family

ID=24617068

Family Applications (1)

Application Number Title Priority Date Filing Date
US652506A Expired - Lifetime US2845908A (en) 1957-04-12 1957-04-12 Buffer mechanism

Country Status (6)

Country Link
US (1) US2845908A (US20080293856A1-20081127-C00150.png)
BE (1) BE566698A (US20080293856A1-20081127-C00150.png)
CH (1) CH366007A (US20080293856A1-20081127-C00150.png)
DE (1) DE1073977B (US20080293856A1-20081127-C00150.png)
FR (1) FR1200333A (US20080293856A1-20081127-C00150.png)
GB (1) GB845483A (US20080293856A1-20081127-C00150.png)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115637A (en) * 1961-08-11 1963-12-31 Olin Mathieson Explosive actuated fastener driving tools
US3239121A (en) * 1963-01-11 1966-03-08 Omark Industries Inc Piston powder actuated tool
US3566978A (en) * 1968-01-29 1971-03-02 Hilti Ag Apparatus for driving anchoring elements for a predetermined depth of penetration
DE1603769B1 (de) * 1965-03-08 1972-05-31 Etem Et De Tech Modernes Ladeeinrichtung an einem Brennkraftbolzensetzer
FR2405788A1 (fr) * 1977-10-13 1979-05-11 Hilti Ag Pistolet fixateur de goujons
US4222462A (en) * 1978-10-11 1980-09-16 Ottestad Jack Benton Brake to decelerate axially moving actuating rod
US20050051591A1 (en) * 2003-09-05 2005-03-10 Guenter Rohrmoser Setting tool
US20150233087A1 (en) * 2012-08-17 2015-08-20 Krauss-Maffei Wegmann Gmbh & Co. Kg Device and method for coupling an attachment to a vehicle
US20160356586A1 (en) * 2015-06-02 2016-12-08 Fast Brass, Llc Shell retaining assembly
WO2017118888A1 (en) * 2016-01-05 2017-07-13 Technovation Pty Ltd Rock breaking

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222961A1 (de) * 1992-07-13 1994-01-20 Hilti Ag Pulverkraftbetriebenes Setzgerät
DE4441635C2 (de) * 1994-11-23 1998-10-08 Peter Dipl Ing Dr Lell Mit einer Treibladung arbeitende Schlagvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB141406A (en) * 1918-12-13 1920-04-13 Robert Temple Improvements relating to means for performing mechanical operations by the use of projectiles
US1365870A (en) * 1919-12-15 1921-01-18 Temple Robert Explosively-actuated affixing device
DE919940C (de) * 1941-11-13 1954-11-08 Messerschmitt Boelkow Blohm Durch feste Treibstoffe betriebenes Bearbeitungswerkzeug zur Abgabe schlagartiger Arbeitsleistungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115637A (en) * 1961-08-11 1963-12-31 Olin Mathieson Explosive actuated fastener driving tools
US3239121A (en) * 1963-01-11 1966-03-08 Omark Industries Inc Piston powder actuated tool
DE1603769B1 (de) * 1965-03-08 1972-05-31 Etem Et De Tech Modernes Ladeeinrichtung an einem Brennkraftbolzensetzer
US3566978A (en) * 1968-01-29 1971-03-02 Hilti Ag Apparatus for driving anchoring elements for a predetermined depth of penetration
FR2405788A1 (fr) * 1977-10-13 1979-05-11 Hilti Ag Pistolet fixateur de goujons
US4222462A (en) * 1978-10-11 1980-09-16 Ottestad Jack Benton Brake to decelerate axially moving actuating rod
US20050051591A1 (en) * 2003-09-05 2005-03-10 Guenter Rohrmoser Setting tool
FR2859405A1 (fr) * 2003-09-05 2005-03-11 Hilti Ag Outil de scellement
US7055727B2 (en) * 2003-09-05 2006-06-06 Hilti Aktiengesellschaft Setting tool
CN100457397C (zh) * 2003-09-05 2009-02-04 希尔蒂股份公司 安装工具
US20150233087A1 (en) * 2012-08-17 2015-08-20 Krauss-Maffei Wegmann Gmbh & Co. Kg Device and method for coupling an attachment to a vehicle
US20160356586A1 (en) * 2015-06-02 2016-12-08 Fast Brass, Llc Shell retaining assembly
WO2017118888A1 (en) * 2016-01-05 2017-07-13 Technovation Pty Ltd Rock breaking

Also Published As

Publication number Publication date
GB845483A (en) 1960-08-24
CH366007A (de) 1962-11-30
FR1200333A (fr) 1959-12-21
DE1073977B (de) 1960-01-21
BE566698A (US20080293856A1-20081127-C00150.png)

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