Improved Pipe Coupling.
Year: 1890

page_text: Date of Application, 20th June, 1890-Accepted, 16th Aug., 1890
CUMI LEID
Improved Pipe Coupling.
I, CHRISTIAN BERTHOLD HÜHNERMANN of Wackersleben, in the Empire of Germany,
Engineer do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the following
statement:-
This Invention relates to a pipe coupling which may be quickly coupled up and
uncoupled and is especially designed for use in awkward positions.
Reference is to be had to the accompanying drawings, forming part of this speci-
fication, wherein figure 1 shews a side elevation of the coupling almost, but not
quite, tightened up. Figure 2 is a plan of same, the screw-gear for oporating the
coupling being omitted and shewn in figure 3 in front elevation.
A A are the two tubes to be coupled together, B B' are loose collars serving to
carry the tightening mechanism and transmit the pressure uniformly to the flanges of
the pipe ends to be coupled. The collars are guided by steady pins 6 61 and the
collar B has brackets e e carrying gudgeons upon which are pivoted the tension
links or lovers C C. To these links C Care pivoted, by their gudgeons f", the
thrust links D D' which are coupled by a cross-bar F and whose other ends bear in
V-notched blocks d d on the other collar B, the pairs of tension and thrust
members C C D D' forming a sort of toggle whereby the collars B B' are pressed
towards each other when the centres f", d d', and ', are brought in the plane
of the pipe. This is done by means of the gear shown in figure 3, consisting of a
stirrup E embracing the pipe and resisting the thrust of a pressure screw k turned
by a wheel and screwing through a cross-bar g¹ supported by nuts i and bearing
against a pressure bar y sliding on the stirrup and bearing against the levers C Ci
whereby the latter are brought towards the line of the pipe, the collars B B' are
drawn together, and the flanges of the pipes A A' are firmly pressed against the
intermediate packing, thus making an absolute tight-joint.
11 111
The essential advantages of this coupling are the rapidity with which it can be
coupled up and uncoupled and its availability in localities where there is no room for
screwing up in the ordinary way. For specific purposes the screw is lengthened
to permit of the coupling being operated from outside the chamber within which it is
situated, when for instance the latter contains noxious gases or is unapproachable on
any other account. For instance in case of fire it may be readily uncoupled
from an adjoining apartment, and allow the escape of stean or gases to extinguish
the fire.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
A pipe coupling comprising a pair of collars B B' adapted to embrace the pipe
flanges as described, and drawn together by the toggle-like action of pairs of tension
and thrust members C C D D pivoted together and respectively coupled and acting
on the collars as described, in combination with the screw operating gear consisting
of the stirrup pressure bar and screw adapted to act on the links (C', as
described.
Dated this 20th day of June 1800