US524832A - Piston-rod packing - Google Patents

Piston-rod packing Download PDF

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US524832A
US524832A US524832DA US524832A US 524832 A US524832 A US 524832A US 524832D A US524832D A US 524832DA US 524832 A US524832 A US 524832A
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piston
packing
rod
rod packing
interior
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    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings

Definitions

  • Figure 1 is a verticalsectional view of an engine cylinder and adjuncts having my in'-V vention applied thereto.
  • Fig. 2 is a side view of the packing detached.
  • Fig.3 is an end v1ew of the same.
  • Fig. 4 is a longitudinal section.
  • the object of the invention is to provide a device which can be readily substituted for the ordinary stuffing-boxes employed in con ⁇ nection with piston rods, which shall be durable, easily applied andwithdrawn, which will permit an adjustment of the tightness of the packing, and which shall be inexpensive.
  • A represents a cylinder which may be ot' any of the ordinary sorts. It contains a piston C, the rod C of which passes through the cylinder head B, the latter being detachably fastened by bolts as at b.
  • the head B has a central aperture, and around iton the exterior is the hub-like packing box b formed with an interior thread at b2.
  • the packing which I have devised consists of a tube having a cylindrical portion d4, a conical or tapering portion d with an intervening flange or polygonal expansion D', these being yall castin one piece, indicated at D.
  • the part d4 is provided with an exterior thread adapted to engage with the thread at b2 in the packing-box, and it can be driven tightly into place by applying a wrench to the liange D so that the joint between the packing and the cylinder-head shall be per fectly tight.
  • the collar E is applied tothe conical or tapcring outwardly projecting part d' of the packing.
  • This collar Eis in the nature of a nut having an interior tapering thread corresponding in pitch and radius to that at d.
  • the part d is made of a material which shall be comparatively soft so as to be capable readily of uniform compression and yet permit suiicient expansion radially when necessary to allow for regulating the tightness of the joint betweenV it and the piston-rod.
  • Babbitt-metal can be employed, or any other which is suitable.
  • the cylindrical part d4, the flange part D and the conical part d can be ⁇ all cast in one piece, and it will be seen that thewhole packing device is made up of two parts.V i
  • VVhen the nut E is advanced along the cone CZ', the latter will be uniformly compressed, the interior cylindrical surface being pressed toward the axis with its longitudinal lines in parallelism so as to effect a packing over a prolonged surface and one which will be uniform in tension at all places around the center.
  • the herein described packing device for a 5 piston-trod having the cylindrical threaded part d4, the conical or tapering threaded part d', and the lzingev D integral with the parts d4, d and provided with the interior tubular opening adapted to t the piston-rod, ⁇ in com- 1o bination with the nut or collar E having an

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

(No Mode-1.)
- J. LISTBR.
PISTON ROD PACKING.
No. 524,832.` Patentedug. 21,1894@ PATENT OFFICE.
JOSEPH LISTER, OF CHICAGO, ILLINOIS.
PlsToN-Roo PAoKiNG.
SPECIFICATION forming part of Letters Patent No. 524,832, dated August 21, 1894. Application filed May 19, 1894. Serial No. 511,790. (No model.)
.To @ZZ whom it may concern:
Be it known that I, JosEPE LIsTER, acitizen of the United States, residing at Chicago, in the countyof Cook and State of Illinois, have lnvented certain new and useful Improvements in Piston-Rod Packing; and Ido declare the following to bea full, clear, and exact description of the invention, such las will enable, others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.
Figure 1 is a verticalsectional view of an engine cylinder and adjuncts having my in'-V vention applied thereto. Fig. 2 is a side view of the packing detached. Fig.3 is an end v1ew of the same. Fig. 4 is a longitudinal section.
The object of the invention is to provide a device which can be readily substituted for the ordinary stuffing-boxes employed in con` nection with piston rods, which shall be durable, easily applied andwithdrawn, which will permit an adjustment of the tightness of the packing, and which shall be inexpensive.
In the drawings, A represents a cylinder which may be ot' any of the ordinary sorts. It contains a piston C, the rod C of which passes through the cylinder head B, the latter being detachably fastened by bolts as at b.
The head B has a central aperture, and around iton the exterior is the hub-like packing box b formed with an interior thread at b2.
It is necessary, as is well known, to provide a steam-tight joint for` the piston-rod C; and to attain this, many means have been employed, or suggested heretofore.
The packing which I have devised consists of a tube having a cylindrical portion d4, a conical or tapering portion d with an intervening flange or polygonal expansion D', these being yall castin one piece, indicated at D.
The part d4 is provided with an exterior thread adapted to engage with the thread at b2 in the packing-box, and it can be driven tightly into place by applying a wrench to the liange D so that the joint between the packing and the cylinder-head shall be per fectly tight. t Y
Normallythe piston-rod can pass freely through the interior tubular passage-way in the' packing, these parts being turned accurately so as to tit closely.
` A tter the packing tube has been put in place and the piston-rod passed through it, the collar E is applied tothe conical or tapcring outwardly projecting part d' of the packing. This collar Eis in the nature of a nut having an interior tapering thread corresponding in pitch and radius to that at d. The part d is made of a material which shall be comparatively soft so as to be capable readily of uniform compression and yet permit suiicient expansion radially when necessary to allow for regulating the tightness of the joint betweenV it and the piston-rod. For this purpose Babbitt-metal can be employed, or any other which is suitable. The cylindrical part d4, the flange part D and the conical part d can be `all cast in one piece, and it will be seen that thewhole packing device is made up of two parts.V i
VVhen the nut E is advanced along the cone CZ', the latter will be uniformly compressed, the interior cylindrical surface being pressed toward the axis with its longitudinal lines in parallelism so as to effect a packing over a prolonged surface and one which will be uniform in tension at all places around the center.
Iam aware of the fact that packings for this purpose have been heretofore used or suggested, each ofwhich contained a tubular part `for surrounding the piston-rod. But so far as I am aware, they were made in several pieces separated on radial planes. In my case the tubular portion is continuous entirely around the axis, so that I avoid entirely the possibility of leakage, and overcome any tendency to unevenness of cornpression radially and at the same time provide, as above stated, for driving the packing surface inward uniformly over a prolonged area.
The herein described packing device for a 5 piston-trod, having the cylindrical threaded part d4, the conical or tapering threaded part d', and the lzingev D integral with the parts d4, d and provided with the interior tubular opening adapted to t the piston-rod,`in com- 1o bination with the nut or collar E having an
US524832D Piston-rod packing Expired - Lifetime US524832A (en)

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