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Syringe.

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Publication number
US1165686A
US1165686A US2062215A US1165686A US 1165686 A US1165686 A US 1165686A US 2062215 A US2062215 A US 2062215A US 1165686 A US1165686 A US 1165686A
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Prior art keywords
head
stem
portion
end
face
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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
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Inventor
Patrick J Mcelroy
Original Assignee
Randall Faichney Co
Charles P Blinn Jr
Renton Whidden
Patrick J Mcelroy
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513Piston constructions to improve sealing or sliding

Description

MCELR v SYRINGE. I I APPLICATION FILED APR. 12, I915- 1,,165,686. I Patented Dec. 28, 1915.

7 va/ Ix El /7 12' PATRICK J'. MCELBUY, 0F GAMBEEDGE, 1/1..

CHARLES P. BLINILI, JR., 013 BOSTON, I'fl' SETIS, ASE-16110113 OF ONE-HALF TO JSETTS, ANT!) R JTUN YVHIDDEN, OF

BROOKLZNE, ll'IASSACI-iUSETlS, RECEIVERS OF RANDALL FAICHNEY CO.

SYRINGE.

Application filed April 1.2, 1915.

Z 0 all to from it may concern Be it known that 1, PATRICK J. Molinnor, a citizen of the Unite l States, and a resident of Cambridge, in the county of Middlesex and State of ll lassachuse ts, have invented certain new and useful Improvements in Syringes, of which the following is a. specification.

This invention relates particularly to small syringes for hypodermic use, comprising a. barrel or container usually of glass having a contracted outlet at one end adapted to engage a hypodermic needle, its other end being open, and a piston comprising an elongated cylindrical stem of smaller diameter than the interior of the barrel, and compressible material engaged with the inner end of the stem and constituting compressible head which conforms closely to and is in slidingcontact with the internal surface of the barrel or container.

The invention has for its object to pro vide certain improvements in the form and construction of the inner end portion of the stem and of the compressible head ngaged therewith, whereby the head may be readily and securely engaged with the stem and caused to turn therewith in the barrel.

lfhe invention consists in the improvements which 1 will now proceed to describe and claim.

Of the accompanying drawings forming a part of this specification: Figure 1 is a side elevation of the stem, and a longitudinal section of the head, of a piston embody ing my invention, the barrel being shown in section; Fig. 2 represents a side View of a portion of the stem; Fig. 3 represents an end View showing the inner end face of the stem; Fig. 1 represents a sectional View of the head, detached and contracted to substantially its normal size; Figs. 6, and 7 represent views corresponcing respectively to Figs. 2, 3 and 1, and illustrating a modification.

The same reference characters indicate the same or similar parts in all the Views.

in the drawings, 12 represents the stem and 13 the head of a syringe piston, said stem and head being movable in a syringe barrel or container 14-.

The stem may be made of glass or any other suitable material and may be of metal, if desired. T he stem is of cylindrical form Specification of Letters Patent.

Patented Dec. 28, 1915.

Serial No. 28,622.

and its inner end is formed substantially at right angles with its longitudinal. axis, and constitutes what 1 call an inner end face 15. The diameter of the stem is reduced to form an annular shoulder 16, separated from the end face 15 by a narrow peripheral portion 17, and facing oppositely from the end face 15.

lhe reduced portion 12 of the stem is adapted to be embraced by the sleeve hereinafter described, and therefore constitutes a sleeve-engaging portion.

The head 13 may be made of any suitable compressible material s ch as asbestos, and formed from an asbestos cord wound and disposed on the stem substantially according to the disclosure in my Patents 319,918 and 962,65? to cover the end face 15, the peripheral portion 17 and form a sleeve portion engaging the shoulder 16. I prefer, however, to mold the head from elastic rubber or its equivalent, said head being elastically yielding and compressible. The head includes a body portion 1S extending across and covering the end face 15, and an annular marginal portion 13 surrounding the peripheral portion 17 or" the stem and compressed between the said portion and the interior of the barrel.

On the marginal portion 13 is formed a sleeve 18 which is internally contracted to embrace the stem portion and form an internal shoulder 19, adapted to engage the stem shoulder 16. 'l he head and sleeve constitute a cup adapted to receive the end face 15 and the adjacent portions of the stem, as shown by 1, the body portion 13 of the head covering the end face 15, and being held said face by the engagement of the internal shoulder 19 with the stem shoulder 16, the stem and head being thus connected for simultaneous longitudinal movement.

Sometimes a sticky liquid is administered by a syringe of this character, in which case the head, which conforms closely to, and is compressed by the internal surface of the barrel, becomes cemented more or less firmly to the barrel by said liquid, after protracted disuse of the syringe while it contains the liquid, so that considerable force is required to free the head and permit it to slide in the barrel. The easiest and best way of freeing the head is by turning it in the barrel, by

turning the stem. If endwise pressure is exerted on the stem to free the head, the pressure is liable to break the barrel. To prevent the stem from turning in the head without turning the latter, and to insure the rotation of the head by the stem Without liability of injuring the marginal portion 13 by the twisting strain exerted on the head by the stem, 1 provide the end face 15 with spurs 21, formed to indent the inner surface of the body portion 13, and thus cause said body portion and the marginal portion to turn with the stem. Said spurs are preferably pointed and of pyramidal form although they may be of conical or other form, if desired. The peripheral portion 17 is preferably provided with similar spurs 22 radiating therefrom and formed to indent the inner surface of the marginal portion 13 of the head. The spurs 22, however, unaided by the end face spurs 21, cannot be relied upon to free the head, because they are liable to turn in the marginal portion of the head, without turning the head. l have found that the end face spurs 2-1, either alone or in cooperation with the peripheral spurs 22, constitute a satisfactory and eifee tive means for causing the head to turn with the stem without injurious twisting strain. The reduced portion 12 of the stem adjacent to the shoulder 16, is also preferably provided with spurs 24 formed to indent the inner surface of the sleeve 18 and aid in causing the head to turn as a whole with the stem.

Figs. 5, 6 and 7 illustrate a modification in which the sleeve portion 18 of the head is relatively short, and is provided with an iiiternal annular shoulder 19 adapted to ena shoulder 16 on the stem, the peripheral spurs 22 and 2% being omitted. The stem may be provided with transverse orifices 27 to receive stitches attaching the head to the stem, said orifices being indicated by dotted lines in Figs. 5 and 6.

I claim:

1. A syringe piston comprising astem having an end face at its inner end, spurs projecting outwardly from said end face, head-engaging means adjacent to said face, and a sleeveengaging portion adjacent to said head-engaging means, and an elastic head including a body portion covering said face, a marginal portion embracing a portion of the periphery of the stem and a sleeve incense embracing said sleeve engaging portion, whereby the body portion of the head is held in engagement with said spurs, to cause the head to turn with the stem. 7

2. A syringe piston comprising a stein having an end face at its inner end, spurs projecting outwardly from said end face, head-engaging means adjacent to said face, and a sleeve-engaging portion adjacent to said head-engaging means, and an elastic head including a body portion covering said face, a marginal portion embracing a portion of the periphery of the stem and a sleeve embracing said sleeve engaging portion, whereby the body portion of the head is held in engagement with said spurs, to cause the head to turn with the stem, the stem being provided also with peripheral spurs engaging the internal surface of the marginal portion of the head,

3. A syringe piston comprising a stem having an end face at its inn r end, spurs projecting outwardly from said end face, head-engaging means adjacent to said face, and a sleeve-engaging portion adjacent to said head-engaging means, and an elastic head including a body portion covering said face, a marginal portion enrracing a portion of the periphery of the stem and a sleeve embracing said sleeve engaging portion, whereby the body portion ofthe head is held in engagement with said spurs, to cause the head to turn with the stem, the stem being provided also with peripheral spurs engaging the internal surface of the marginal portion of the head, and with other peripheral spurs engaging the internal surface of said sleeve.

t. A syringe piston stem having an end face at its inner end, head-engaging spurs projecting outwardly from said end face and complemental head-engaging means adjacent to said face, and. adapted to hold a compressible head against said spurs.

5. A syringe piston stem havingan end face at its inner end, head-engaging spurs projecting outwardly from said end face and complemental head-engaging 1821118 adjacent to said face, and adapted to hold a compressible head against said spurs, said stem being also provided with radial spurs to engage other parts of said compressible head.

in testimony whereof I have affixed my signature.

PATRICK J. MCELROY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C.

US1165686A 1915-04-12 1915-04-12 Syringe. Expired - Lifetime US1165686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1165686A US1165686A (en) 1915-04-12 1915-04-12 Syringe.

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US1165686A true US1165686A (en) 1915-12-28

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895773A (en) * 1956-10-22 1959-07-21 Robert K Mcconnaughey Variable diameter tensed ring piston
US3012359A (en) * 1959-07-16 1961-12-12 Foster Max Clugston Combination sinker and floater device
US4354507A (en) * 1978-01-17 1982-10-19 Concord Laboratories Syringe
US4411275A (en) * 1981-11-02 1983-10-25 Concord Laboratories, Inc. Syringe
US5376072A (en) * 1993-12-15 1994-12-27 Lake Medical Products, Inc. Apparatus for and method of, crushing a pill and administering the pill ingredients
US5464393A (en) * 1993-12-15 1995-11-07 Lake Medical Products, Inc. Apparatus for, and method of, crushing a pill, suspending the pill ingredients in a liquid, and administering the suspension
US5472421A (en) * 1993-12-15 1995-12-05 Lake Medical Products, Inc. Pill crushing syringe with plug to impede crushed pill particles from prematurely entering the catheter
US5478311A (en) * 1993-12-15 1995-12-26 Klearman; Jeffrey D. Hand held combination pill crushing and dispensing device
US5553793A (en) * 1993-12-15 1996-09-10 Lake Medical Products, Inc. Combination pill crushing and dispensing cup
US20060173418A1 (en) * 2004-12-13 2006-08-03 Arrow International, Inc. Loss of resistance syringe
US20090072059A1 (en) * 2007-09-17 2009-03-19 Bell Brian D Pill Crusher With Pill Holder Verification And Safety Features
US20140081214A1 (en) * 2008-11-26 2014-03-20 Acist Medical Systems, Inc. Apparatus and methods for fluid pressurizing units of injection systems
US20150190581A1 (en) * 2009-12-18 2015-07-09 Sanofi-Aventis Deutschland Gmbh Piston for a cartridge and piston rod for a drug delivery device

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895773A (en) * 1956-10-22 1959-07-21 Robert K Mcconnaughey Variable diameter tensed ring piston
US3012359A (en) * 1959-07-16 1961-12-12 Foster Max Clugston Combination sinker and floater device
US4354507A (en) * 1978-01-17 1982-10-19 Concord Laboratories Syringe
US4372325A (en) * 1978-01-17 1983-02-08 Concord Laboratories, Inc. Method for taking a blood sample
US4363329A (en) * 1978-01-17 1982-12-14 Concord Laboratories, Inc. Syringe having a reverse-taper barrel
US4411275A (en) * 1981-11-02 1983-10-25 Concord Laboratories, Inc. Syringe
US5618004A (en) * 1993-12-15 1997-04-08 Lake Medical Products, Inc. Top mounted cups for storing crushing and dispensing pills
US5376072A (en) * 1993-12-15 1994-12-27 Lake Medical Products, Inc. Apparatus for and method of, crushing a pill and administering the pill ingredients
US5464393A (en) * 1993-12-15 1995-11-07 Lake Medical Products, Inc. Apparatus for, and method of, crushing a pill, suspending the pill ingredients in a liquid, and administering the suspension
US5472421A (en) * 1993-12-15 1995-12-05 Lake Medical Products, Inc. Pill crushing syringe with plug to impede crushed pill particles from prematurely entering the catheter
US5553793A (en) * 1993-12-15 1996-09-10 Lake Medical Products, Inc. Combination pill crushing and dispensing cup
US5478311A (en) * 1993-12-15 1995-12-26 Klearman; Jeffrey D. Hand held combination pill crushing and dispensing device
US20060173418A1 (en) * 2004-12-13 2006-08-03 Arrow International, Inc. Loss of resistance syringe
US20090072059A1 (en) * 2007-09-17 2009-03-19 Bell Brian D Pill Crusher With Pill Holder Verification And Safety Features
US7735763B2 (en) 2007-09-17 2010-06-15 First Wave Products Group, Llc Pill crusher with pill holder verification and safety features
US20140081214A1 (en) * 2008-11-26 2014-03-20 Acist Medical Systems, Inc. Apparatus and methods for fluid pressurizing units of injection systems
US9352105B2 (en) * 2008-11-26 2016-05-31 Acist Medical Systems, Inc. Apparatus and methods for fluid pressurizing units of injection systems
US20160243306A1 (en) * 2008-11-26 2016-08-25 Acist Medical Systems, Inc. Apparatus and methods for fluid pressurizing units of injection systems
US20150190581A1 (en) * 2009-12-18 2015-07-09 Sanofi-Aventis Deutschland Gmbh Piston for a cartridge and piston rod for a drug delivery device

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