Improvements in Lubricating the Piston or Plunger Rods of Hydraulic Cylinders for Hoists and other purposes.
Year: 1895

page_text: Date of Application, 26th Mar., 1895
Complete Specification Left, 23rd Dec., 1895-Accepted, 25th Jan., 1896
TRUVIDIONAL DI MULTIVATION
Improvements in Lubricating the Piston or Plunger Rods of
Hydraulic Cylinders for Hoists and other purposes.
I, JOHN ALEXANDER STEVEN, of 12 Royal Crescent, West, in the City and
County of Glasgow, Engineer, do hereby declare the nature of my invention to
be as follows:-
This invention has reference to an improved method and appliances for lubricating
the piston or plunger rods of hydraulic cylinders used in hoists and for other like
purposes.
According to my improvements I fit an annular sleeve or gland at the top of
the stuffing box of the piston or plunger rod, and at the lower part of this
sleeve I fit within it a brass bush or liner surrounding the piston rod, and the
sleeve would be formed with a flange for being connected by bolts to a flange
on stuffing box. An aunular chamber or recessed space would be formed in the
sleeve for a sponge or fibrous oil reservoir, being placed adjacent to the piston
rod; and a trough or gutter shaped cup would be fitted over the sleeve preferably
by being screwed to its inner surface. Oil or like lubricant would be placed in
this cup and a wick would lead the oil siphon-ways from this cup down between
cup and piston rod to the sponge chamber, where the sponge would absorb it
and give it out automatically to lubricate the piston rod. A narrow annular
space would also be formed round the piston rod between the sponge chamber
and the brass liner, so as to receive and trap any water that may pass through
the liner joint, and an angled slit or oriface would be formed through sleeve from
this trap chamber for the outflow of any accumulated water.
A similar arrangement would be fitted at the lower end of the stuffing box,
where the oil cup would be preferably formed as a segmental gutter at the
lower part of the sleeve. While the sponge chamber would be formed as a
bolted on end cap cover with annular space between it and the piston rod.
A brass or other ring would be fitted at top of sponge chamber, and the water
trapping chamber, be formed in the sleeve over this. The oil would flow by a
siphon wick from the gutter through an angled oriface in sleeve into the water
trap chamber and past the ring into the sponge absorbing chamber.
While any
water passing through the brass liner and accumulating in the water trap
chamber would flow through an angled oriface into a gutter or trough formed in
an outside flange on the sleeve and a leading away pipe may be connected to
this gutter; or alkalies may be placed in these chambers to form a saponified
mixture of lubricating material.
Dated the 25th day of March 1895.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.

page_text: Improvements in Lubricating the Piston or Plunger Rods of
Hydraulic Cylinders for Hoists and other purposes.
I, JOHN ALEXANDER STEVEN, of 12 Royal Crescent West, in the City and
County of Glasgow, Engineer, do hereby declare the nature of my invention and in.
what manner the same is to be performed, to be particularly described and ascertained.
in and by the following statement in writing that is to say:-
This invention has reference to an improved method and appliances for lubricating
the piston or plunger rods of hydraulic cylinders used in hoists, and for other like
purposes.
And in order that my said invention and the manner of performing or carrying
same into practice may be properly understood, I have hereunto appended an
explanatory sheet of drawings in which
Figure 1 is a sectional elevation broken away showing my improvements as
applied to the stuffing box of the plunger rod of an hydraulic cylinder for hoists
and like purposes.
Figure 2 is a similar view of these improvements as applied to the stuffing box
at lower end of the ram cylinder, and
Figure 3 is a plau of same.
'Referring to these drawings
According to my improvements as shown in Figure 1 I fit an annular sleeve or
gland A at the top of the stuffing box of the piston rod B and at the lower part of
this sleeve I fit within it a brass bush or liner B¹ surrounding the piston rod B
and the sleeve A is formed with a flange A' for being connected by bolts to a
flange on ordinary stuffing box, not shown in the drawing. An annular chamber
or recessed space A is formed in the sleeve A to receive a sponge or fibrous oil
absorbent placed around the piston rod B, and a trough or gutter shaped cup C is
fitted above the sleeve A preferably, as shown, by being screwed or otherwise
secured to its inner surface. Oil or like lubricant is placed in this cup C and a
wick a leads the oil siphon ways from this cup C down between the cup and the
piston rod B to the sponge chamber A' where the sponge absorbs it and gives it
out automatically to lubricate the piston rod B. A narrow annular space B2 round
the piston rod B between the sponge chamber A' and the brass liner B¹ receives
and traps any water that may pass the liner B' and an angled slit or orifice 6 is
formed through the sleeve from this trap chamber B' for the outflow of any water
accumulating therein.
As shown in Figures 2 and 3 a similar arrangement is fitted to the stuffing box
at lower end of the ram cylinder where the oil cup C would be preferably formed
as a gutter at one side of a thick square or round shaped flange A at the lower
part of the gland or sleeve A, by which it is bolted to a flange on the stuffing box
not shown in the drawing, while the sponge chamber A2 is formed by a bolted on
end cap cover A' with annular space between it and the plunger D. A projecting
part or flange a¹ on the sleeve A, or it may be brass or other ring, is formed or
fitted above the sponge chamber A' and the water trapping chamber B' is formed
in the sleeve A over this.
The oil flows by a siphon wick a from the gutter C through an
angled orifice a³
in the sleeve A into the water trapping chamber B2, and past the projection d into
the absorbent chamber A. While any water passing the brass liner B¹ and
accumulating in the water trapping chamber B2 flows through an angled orifice b
into a gutter or trough 6' formed in the flange A on the sleeve A, and a leading
away pipe may be connected to this gutter b. Alkalies may be placed in
the chamber to form a saponified mixture of lubricating material if desired.

page_text: Having now particularly and ascertained the nature of my invention and in.
what manner the same is to be performed I declare that what I claim is :-
First. The herein described method of lubricating the piston rods or plungers
of hydraulic cylinders for hoists and other purposes, substantially as set forth.
Second. In connection with the piston rods or plungers of hydraulic cylinders.
for hoists and other purposes the arrangement and use of a reservoir chamber or
chambers surrounding the piston rod and containing sponge, fibrous or like material
charged with oil or lubricating fluid substantially as herein described in reference.
to and shown in the accompanying drawings.
Third. The arrangement of appliances for lubricating the piston rods or
plungers of hydraulic cylinders for hoists and other purposes substantially as
herein described in reference to and shown in the accompanying drawings.
lat Domb 1005
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.