US1750340A - Locking device - Google Patents

Locking device Download PDF

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Publication number
US1750340A
US1750340A US264127A US26412728A US1750340A US 1750340 A US1750340 A US 1750340A US 264127 A US264127 A US 264127A US 26412728 A US26412728 A US 26412728A US 1750340 A US1750340 A US 1750340A
Authority
US
United States
Prior art keywords
cylinder
ring
spring
handle
valve box
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
US264127A
Other languages
English (en)
Inventor
Zimmermann William Frank
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.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand Co
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 Ingersoll Rand Co filed Critical Ingersoll Rand Co
Priority to US264127A priority Critical patent/US1750340A/en
Priority to GB4955/29A priority patent/GB308578A/en
Priority to DEI37117D priority patent/DE517727C/de
Priority to FR670331D priority patent/FR670331A/fr
Application granted granted Critical
Publication of US1750340A publication Critical patent/US1750340A/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
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32418—Plural distinct positions

Definitions

  • This invention relates to pneumatic tools, but more particularly to a locking device for pneumatic tools of the type in which the tool handle is secured to the cylinder by means of screw threads.
  • the objects of the invention are to maintain a tight connection between the casing parts of pneumatic tools, such as chipping hammers, riveters and the like, and to enable the connection to be conveniently tightened whenever it becomes loosened through wear.
  • Figure l is a sectional elevation of a portion of a pneumatic tool having the invention applied thereto,
  • Figure 2 is a transverse view taken through Figure 1 on the line 22 looking in the direction indicated by the arrows, and
  • Figure 3 is a perspective view of the locking device and the elements adapted to be locked together.
  • A designates the cylinder of a pneumatic tool
  • B the piston reciprocable in the cylinder
  • C the handle whereby the tool may be manipulated.
  • the handle C in this instance has an extension D in the form of a hood having an internal threaded portion E to receive an externally threaded portion F on the rearward end of the cylinder A.
  • said extension is preferably provided with a plain cylindrical internal surface G in its front end to slidably receive a smooth cylindrical surface H of the cylinder.
  • Pressure fluid for actuating the tool is admitted through a passage J extending through the handle C and communicating at its inner end with a pressure chamber K in the rearward end or wall D of the extension D.
  • the distribution of pressure fluid to the cylinder for actuating the piston B may be effected by suitable valve mechanism, only the exterior of the valve box L of which is 50 shown, said valve box L being located in an Serial No. 264,127.
  • the valve box may consist of one or more parts, two being shown in the drawings, and its total length preferably exceeds somewhat that of the bore in which it is disposed. In this way the wall D may bear against the end of the valve box L when the handle is screwed on the cylinder A for clamping the valve box L firmly in the bore 0.
  • the pressure fluid utilized for actuating the piston B may again be conveyed through the inlet passages and the valve box, thence through an exhaust passage R leading from the bore 0 to the exterior of the cylinder A.
  • valve structure such as the valve box L
  • any clearance formed by the unscrewing of the handle on the cylinder will of course allow the valve box to vibrate in the bore 0.
  • Such movement of the valve box will effect the efficient functioning of the valve and consequently of the reciprocatory elements of the tool.
  • the present invention contemplates the provision of means for assuring a tight connection between the cylinder A and the h andle B.
  • the extension D is provided with a lug S which projects forwardly of the extension and. forms a seat or abutment for an end E of a spring U.
  • the spring U is in the form of a ring, the inner diameter of which is preferably of such size as to enable the spring U to fit snugly on the cylindrical surface H of the cylinder.
  • An abutment is provided for the opposite end V of the spring U by a lug formed on the end of a ring X, which, like the spring U, is also adapted to be disposed on the cylindrical surface H of the cylinder.
  • the ring X not only serves as an abutment for one end of the spring U but also serves as a means for setting up a tension in the spring U.
  • the ring X accordingly is provided on its internal surface with a plurality of grooves Y adapted to register with and of the same formation as the longitudinal grooves Z formed in the cylindrical surface H of the cylinder.
  • the grooves Z in the cylinder slightly exceed in number the grooves Y so that only a slight rotative movement of the ring X will be required in order to bring one groove Y into registry with one of the grooves Z in the cylinder.
  • the grooves Y and Z are of semi-cylindrical formation to accommodate a pin 6 whereby the ring X may be keyed to the cylinder. It is to be understood, however, that the groove may be of any form to accommodate a pin of different cross sectinal form from that disclosed.
  • a cover 0 which forms a casing for these elements.
  • the cover 0 is in the form of a spring ring and may be of sufficiently smaller diameter than the front end of the extension D to enable said cover, due to its resiliency, to tightly engage the front end of the extension D.
  • an inwardly extending flange Z which forms a seat for the front end of the ring X and the pin 5, and also bears against an exhaust deflector which embraces the cylinder A and communicates with the passage It to receive the exhaust fluid therefrom.
  • the front end f of the deflector e abuts a shoulder g on the cylinder A to hold said deflector aganist forward movement on the cylinder A.
  • the deflector 6, like the cover 0, may also be split and is adapted to tightly engage the portion of the cylinder A whereon it is disposed.
  • ends T and V of the spring u are slightly offset with respect to each other so that when the parts are in their assembled positions, said spring will exert a pressure in a longitudinal direction on the ring X to maintain the ring firmly against the flange d and, acting through the ring, to hold the cover 0 and the deflector against endwise movement.
  • the handle C is first threaded tightly on the cylinder A.
  • the spring U may then be placed in position so that its end T abuts the lug S of the extension D.
  • the ring X is placed on the cylindrical portion I-I so that the lug of said ring will form an abutment for the end V of the spring U.
  • the ring X may be rotated in the direction necessary to produce this effect.
  • the pin 6 may be inserted into a pair of registering grooves Y and Z to lock the ring S in position.
  • the cover 0 and the exhaust deflector 6 may be attached to the tool where they will be firmly held due to the inherent resiliency of these elements, as well as by the pressure of the spring U.
  • the spring U is of substantial cross sectional area and is capable of exerting a considerable pressure for tightening the connection between the handle C and the cylinder A.
  • a pneumatic tool the combination of a cylinder and a handle threaded on the cylinder, a plurality of longitudinal grooves in the periphery of the cylinder, an exhaust deflector embracing the cylinder, 3. ring on the cylinder having longitudinal grooves to register with the grooves in the cylinder, a pin inserted in a pair of registering grooves to hold the ring against rotation with respect to the cylinder, lugs on the handle and the ring lying in the same transverse plane, a
  • a pneumatic tool the combination of a cylinder and a handle threaded on the cylinder, a plurality of longitudinal grooves in the periphery of thecylinder, a ring rotatably mounted on the cylinder and having longitudinal grooves in the inner surface thereof to register with the grooves in the cylinder, a pin inserted in a pair of registering grooves to hold the ring against rotation with respect to the cylinder, lugs on the handle and the ring lying in the same transverse plane, a tension spring encircling the cylinder and having ends bearing on the lugs to tighten the connection between the handle and the cylinder, said spring overlying the grooves in the ring to prevent endwise movement of the pins in one direction, a cover encircling 'the ring and the spring, and a flange on the cover forming a seat for the ring and the pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Clamps And Clips (AREA)
US264127A 1928-03-23 1928-03-23 Locking device Expired - Lifetime US1750340A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US264127A US1750340A (en) 1928-03-23 1928-03-23 Locking device
GB4955/29A GB308578A (en) 1928-03-23 1929-02-14 An improved locking device for screwed joints of pneumatic percussive tools
DEI37117D DE517727C (de) 1928-03-23 1929-02-21 Durch Feder und Spannring gesicherte Befestigung des Handgriffes am hinteren Zylinderende von Pressluftwerkzeugen
FR670331D FR670331A (fr) 1928-03-23 1929-02-26 Dispositif de verrouillage pour outils pneumatiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US264127A US1750340A (en) 1928-03-23 1928-03-23 Locking device

Publications (1)

Publication Number Publication Date
US1750340A true US1750340A (en) 1930-03-11

Family

ID=23004702

Family Applications (1)

Application Number Title Priority Date Filing Date
US264127A Expired - Lifetime US1750340A (en) 1928-03-23 1928-03-23 Locking device

Country Status (4)

Country Link
US (1) US1750340A (fr)
DE (1) DE517727C (fr)
FR (1) FR670331A (fr)
GB (1) GB308578A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122459B (de) * 1959-04-15 1962-01-18 Moenninghoff Maschf Ringfoermige Sicherungsfeder fuer die Haltekappe von Drucklufthaemmern

Also Published As

Publication number Publication date
DE517727C (de) 1931-02-09
GB308578A (en) 1929-12-24
FR670331A (fr) 1929-11-27

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