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Патент USA US3069824

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Dec. 25, 1962
D. G. M'ALPAs ETAL
3,069'814
HYPODERMIC NEEDLE SHARPENING MACHINE
Filed July 1'7, 1959
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Dec' 25, 1962A
D. G. MALPAS ETAL
3,069,814
HYPODERMIC NEEDLE SHARPENING MACHINE
Filed July 17, 1959
5 Sheefcs-Sheet 2
_F157 3
Dec. 25,- 1962
D. G. MALPAs ETAL
3,069'814
HYPoDERMIc NEEDLE SHARPENING MACHINE
Filed July 17, 1959
5 Sheets-Sheet 3
39
„41
_P1225 4
United States Patent Ó??ce
3,069,814
ratented Dec. 25, 1962
2
i.
i FIG. 3 is a section on lines 3-3 of FIG. 1.
The second embodiment is illustrated with reference
to FIGS. 4 and 5 of the drawings, in which:
3,0á9,814
HYPODERMIC NEEDLE SHARPENING
MACHINE
Delmar G. Malpas, 8 Holbrooks Road, and Delmar P.
Malpas, 2B Holbrooks Road, both of Fliuders Park,
South Australia, Australia
Filed July 17, 1959, Ser. No. 827,897
Claims priority, application Australia .'iuly 21, 1958
5 Claims. (Cl. 51-59)
FiG. 4 is a perspective view of a machine, and
FIG. 5 is an end elevation of the machine illustrated
' in FIG. 4.
Referring ?rst to the embodiment described in FIGS.
1, 2 and 3, the machine 1 comprises a base 2 on which
is mounted a motor 3 with a drive pulley 4 connected to
10 a driven pulley 5 by a V belt 6. The driven pulley 5
This invention relates to a machine for sharpening hy
podermic needles.
is coupled to the shaft 7 which is carried in bearings in
a support block 8, the end of the shaft 7 being provided
In sharpening instruments, it is common to use a travel
ling belt or rotary wheel or other abrasive member mov
with an eccentric 9 ?tted with a roller 10, the roller 10
being in the form of a ball race. A bearing block 11 is
mounted to the base 2 adjacent the motor 3, and is ?tted
' with a pair of bearings 12 which carry a support rod 13,
ing in a single direction. Such an arrangement however
is found to be somewhat unsatisfactory in the sharpening
of used hypodermic needles, mainly because of the tend
mounted therein for reciprocatory movement.
A cylindrically shaped abrasive member 14 is held on
the support rod 13 by means of the nut 15, while the other
on the trailing'edge of the sharpened portion when con
sidered in relation to the sharpening tool.
.20 end of the support rod 13 carries a slotted member 16,
the walls of the slotted member 16 engaging the roller
' An object of this invention is to provide a means for
10, The abrasive member 14, while substantially cy
sharpening used hypodermic needlesl where the amount
lindrical in Shape, may be provided with inserts 17 which
of burr or rag is substantially reduced below the amount`
may them'selvesbe of any shape desired for the sharpen
present when the needles are sharpened by a rotary wheel
ing of the fendof a hypodermic needle.
or travelling belt. `
The needle clamp 18 is provided with a needle support
Medical practitioners, small hospitals and the like, cur
member 20 on its one face, so that a `needle inserted
rently use large numbers of needles and discard them
through the aperture 21 in the needle clamp 18 is sup
when they are blunt. This is a wasteful practice, since
ported for most of its free length, vthereby reducing the
the cost of a large number of needles is quite considerable._
ency for the needles so sharpened to have a burr o_r` ragV
A further object of this invention is to provide a device
for sharpening needles which have been used, the cost of
which device is small compared With the cost of a large
number of discarded needles.
tendency for the end of a needle to “whip” under the
i action of the abrasive member 14. The needle clamp
18 is provided with a slotted portion 22, in which is in
?erted a clamping member consisting of a slidable clamp
'
ing plate 23 urged upwardly by the clamping Springs
As is well known, in the sharpening of ínstruments,
considerable skill is required if the instruments are to be
sharpened with a very keen edge, as is desirable in the
24, but arranged under the in?uence of the finger o-per
¿"ated‹-car`n member 25.
When the cam member 25 is
operated, the slidable clamping plate 23 moves down
wards against Springs 24 to open -the apertures 21 through
It is a still further object of this invention to provide
the needle clamp 18, but when the cam' member 25 is
a device which may be used by operators who are not
necessarily very highly skilled in the sharpening of in 40. released, the clamping Springs 24 apply a pre-determined
case of hypodermic needles.
_
struments.
-` pressure against a needle inserted through 'the aperture
prising a base, a needle clamp to hold a hypodermic
21 to hold it ?rmly in the needle clamp 18 without
danger of damage to it due to excessive pressure.
An abrasion pressure spring 27 operates to urge the
needle, a pivotal mounting for the clamp, the mounting
needle clamp lå towards the abrasive member 14, again
being connected with the base, a removable abrasive mem
ber adjacent to the clamp and means for oscillatory move
ment between the clamp and the abrasive member.
It Will be appreciated that the invention could be ap
plied in a number of4 ways, such as for example, making 50
a predetermíned pressure being applied to .a needle With
its tip on the brasive member so that the sharpening of
Bríe?y this invention may be said to lie in a machine
for sharpening hypodermic needles, the Amachine com
use of power means to provide the reciprocatory move
ment between the clamp and the abrasive member, ?x
ing the abrasive member in relation to the base and mov
ing the clamp, ?xing the clamp in relation to the base and
moving the abrasive member, providing means whereby
the reciprocatory movement may be effected by hand, and
providing ancillary equipment such as for example, a
the tip will be effective.
A spring loaded release member 28 is arranged to
retain the needle clamp 18 in its retracted position, until
the release member 28 is pushed inwardly, When the
needle clamp 18 will come under the influence of the
abrasion pressure spring 27 to move towards the abra
sive member 14.
A cover 29 encloses the motor and bearing blocks,
and is provided with a shielded light 30 and a switch
31, the light 30 being operated by the switch 31 and
having its rays directed on to the abrasive member 14.
light and magnifying glass to enable an operator to more
A bar 32 supports a magnifying glass 33, the position
clearly see the end of the needle as it is being sharpened.
However, in order for the invention to be more clearly 60 of which may be adjusted, to provide means for-more
clearly viewing the tip of a needle when being sharpened.
understood, two embodiments will be described, one il
lustrating power operated means to provide the recipro
catory movement of the abrasive member and the needle
clamp being ?xed to the base, While the second embodi
The frequency of reciprocation may be varied within
quite wide limits without seriously eífecting the sharpen
ing operation, 'bu-t according to the embodiment de
ment illustrates a hand operated device wherein the needle 65 scribed, it has been found convenient to reciprocate the
abrasive member at about two hundred complete oscil
itself is reciprocated while the abrasive member is ?xed
lations per minute.
in relation to the base.
Referring now to the embodiment illustrated in FIGS.
The ?rst embodiment is described with reference to
, 4 and 5, the machine 35 again is provided with a base
FIGS. 1, 2 and 3 of the accompanying drawings, in which:
FlG. l is a partly sectioned rear elevation of a machine, 70 2, an abrasive member 14, and a needle clamp 18. The
base 2 has two upstanding webs 36, one at each end,
FIG. 2 is a similar View from the other side of the
machine, and
and these upstanding webs support a pair of slides 37
3
on which ís slidably mounted a saddle 38, the saddle
38 being provided with a pair o_f ?nger grips 39 so that
a roller engaged between the walls of said slotted mem
ber, said roller ecoentrically mounted on a shaft, bear
the saddle 38 may be reciprocated on the slides 37 by
ings rotationally supporting said shaft, a motor on said
hand.
base, drive means between said motor and said shaft,
The support rod 40 supports the abrasive member 14, CH a needle clamp to hold a hýpodermic needle, said needle
and holds it ?rmly to the base, the _support rod 40 be
ing carried by the upstanding lug 41 which is itself on
the base f2.
The needle clamp 18 is mounted to the
saddle 33 with a pivotal mounting 4,2, and is urged to
clamp disposed adjacent said abrasive member, a pivotal
mounting on said base for said needle clamp, a needle
support member on said clamp, needle retaining means
within said clamp, and an abrasion pressure spring be
wards the abrasive member by a spring in a manner 10 tween the base and the clamp urging said needle clamp
similar to that described in _the ?rst embodiment.
What we claim is.:
towards said abrasive member.
'
4. A hypoderrnic needle sharpening machine compris
1. A hypodermic needle sharpening machine c'ompris
ing a base, support means reciprocable on said base, a
ing a base, bearings on said base, support means mounted
removable abrasive member on said support means, a
for reciprocatory movement within said bearings, an 15 motor on said base, la shaft journalled in bearings on
abrasive member removably mounted on said support
the base, drive means between the motor and the shaft,
means, a slotted member also on said support means, a
an eccentric on the shaft, said eccentric rotationally en
roller engaged between the walls of said slotted mem
gaging said reciprocable support means, a needle clamp
ber, said roller eccentrically mounted on a shaft, bear
pivoted to the base, a needle support member on the
ings rotationally supporting said shaft, a motor on said. 20 needle clamp arranged to support a needle for most of
base, drive means between said motor and saidV shaft,
its length, and an abrasion pressure spring between the
a needle clamp to hold a hypoderrnic needle, said needle
base and 'the needle clamp urrging the needle clamp to-`
clamp disposed adjacent said` abrasive member, a pivotal
wards the reciproca'ble abrasive member.
mounting on _said base for ?said needle clamp, and an
5. A hypoderinic needle sharpening machine oompris
abrasion pressure spring between the base and the clamp 25 ingl a base, _support means reciproeable on said base, a
urging said clamp towards said? abrasive member.
removable 'abrasive member on said support means, a
2. A hypodermic needle sharpening machine compri-s
motor lon said base, a shaft journalled in bearings onv
ing a base, bearings on said base, a support rod mounted.
the base, drive means between the motor and the `shaft,
for reciproca'tory movement within said bearings, a cylin
an eccentríc on the shaft, said eccentric rotationally en
drically shaped abrasive member removably mounted on 30 gaging said reeiprocable support means, a needle clamp
one end of said support rod, a slotted member on` the
piv'oted to the base, a clamping member movable in the
other end of said support rod, a roller engagedv betweenl
the walls of said slotted member, said roller eccentrícally,
mounted on a shaft, 'bearing's rotationally supporting
needle clamp, a clamping spring between the clamping
member and the needle clamp urging the clamping mem
ber against a needle when inserted in the needle clamp
said shaft, a motor on vsaid base, a belt drive from said 35 to thereby retain said needle, and an abrasion pressure
motor to said shaft, a needle clamp to hold a hypoder
spring between the base and the needle clamp urging the
mie needle, said needle clamp disposed adjaeent said
needle clamp towards the reciprocable abrasive member.
abrasive member, a pivotal mounting on said base for
saidl needle clamp, and an abrasion pressure spring be-v
tween the base and the clamp urging said _needle çl?xrnp. 40
towards said abrasive member.
3. A hypodermic needle sharpening machine eornpris
ing a base, bearings on said base, support means mounted
for reciprocatory movement within said bearings, an
abrasive member removably mounted on said support 45
means, a slotted member also on said support means,
References Cited in the ?le of this patent
UNITED STATES PAT?NTS
,453,661
_Reynolds ____ ____ _____ __ June .9, 1891
,_2,_588,08,9
;Custis et al. __________ __ Mar. 4, 1952
2,604,738
2,663,976
Ramey ______________ __ July 29, 1952
Jacoby ______________ __ Dec. 29, 1953
2,838,8,83
Hall ______ __ _______ __ June 17, 1958
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