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Publication numberUS955006 A
Publication typeGrant
Publication dateApr 12, 1910
Filing dateJan 27, 1909
Priority dateJan 27, 1909
Publication numberUS 955006 A, US 955006A, US-A-955006, US955006 A, US955006A
InventorsJoseph Everett Sparks
Original AssigneeJoseph Everett Sparks
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Abdominal retractor.
US 955006 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


Patented Apr. 12, 1910.




To all whom it may concern:

Be it known that I, JOSEPH E. SPARKS, a citizen of the United States, and a resident of Crossett, in the county of Ashley and State of Arkansas, have invented a new and Improved Abdominal Retractor, of which the following is a full, clear, and exact description.

The invention relates more especially to improvements in abdominal retractors, although with suitable modifications the instrument may present a vaginal speculum, rectal speculum or mouth gag; in any case, the feature of adjustment and automatic locking of the spreading arms being substantially the same.

The invention may be defined as consisting of two U-shaped spreading arms arranged in opposed position and overlapping and slidably connected together at one side, and each arm having its extremity at the opposite side inwardly turned to form a hook, with the hooks facing outwardly.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a perspective view illustrating the application of my invention when in the nature of an abdominal retractor; Fig. 2 is a. face view of the instrument, showing the relative position of the spreading arms in dotted outline and in full lines preparatory to spreading the lips of the incision and after the spreading has taken place; Fig. 3 is a top edge view of the instrument, showing the manner in which it is curved to conform to the body; Fig. l is a crosssection of the instrument on the line 4=4 of F 2; and Fig. 5 is a longitudinal section through the keeper on the line 55 of Fig. et.

In the construction of the instrument I employ two spreading arms 10, 10, one of the spreading arms having a relatively long offset shank 11 and the other arm having a corresponding shorter shank 11 provided at its end with a keeper 12 slidably embracing the shank 11. Both the shanks 11 and 11 are arranged at approximately right-angles Specification of Letters Patent.

Application filed January 27, 1909.

Patented Apr. 12, 1910.

Serial No. 474,409.

to the arms proper, and the shank 11 has a slight edgewise play in the keeper 12, as can be seen from Fig. 5, whereby when pressure is exerted on the free or outer end portions of the arms, the keeper frictionally binds on the shank l1 and automatically locks the arms in adjusted position. If the instrument is to serve as an abdominal retractor,

the free ends of the arms are turned directly toward each other and provided with inwardly-turned hooks 13 to engage the lips of the incision, and the entire instrument is laterally curved to conform to the body, as shown in Fig. 3. The instrument is preferably constructed of sheet metal, which admits of its being relatively light while at the same time embodying requisite strength.

In applying the abdominal retractor to the patient, the arms are moved together and the hooks 13 engaged in the lips of the incision, after which the arms are spread apart to separate the walls as wide as is desired. 0n removing the hands from the spreading arms the tendency of the lips of the incision to close, cocks the movable arm to one side and automatically locks the keeper 12 to the shank 11, all parts of the instrument at this time being entirely out of the way of the operating surgeon. To remove the retractor, the arms are again grasped and the movable arms slightly sprung outwardly at the free or hooked end, when it may be readily shifted on. the shank of the other arm.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

In a surgical instrument, two U-shaped spreading arms arranged in opposed position and overlapping and slidably connected together at one side, and each arm having its extremity at the opposite side inwardly turned to form a hook, with the hooks facing outwardly.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.




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US4486671 *Mar 29, 1982Dec 4, 1984Motorola, Inc.Voltage level shifting circuit
US4535255 *Nov 8, 1984Aug 13, 1985Tokyo-Shibaura Denki Kabushiki KaishaPositive feedback amplifier circuitry
US4554467 *Jun 22, 1983Nov 19, 1985Motorola, Inc.CMOS Flip-flop
US4568842 *Jan 23, 1984Feb 4, 1986Tokyo Shibaura Denki Kabushiki KaishaD-Latch circuit using CMOS transistors
US4628218 *Feb 3, 1983Dec 9, 1986Nippon Electric Co., Ltd.Driving circuit suppressing peak value of charging current from power supply to capacitive load
US4672243 *May 28, 1985Jun 9, 1987American Telephone And Telegraph Company, At&T Bell LaboratoriesZero standby current TTL to CMOS input buffer
US4712058 *Jul 22, 1986Dec 8, 1987Tektronix, Inc.Active load network
US4952818 *May 17, 1989Aug 28, 1990International Business Machines CorporationTransmission line driver circuits
US5307790 *Sep 11, 1992May 3, 1994Surigcal Innovations I, L.P.Bracelet retractor assembly
EP0296508A2 *Jun 18, 1988Dec 28, 1988Honeywell Inc.FET capacitance driver logic circuit
EP0398016A2 *Apr 6, 1990Nov 22, 1990International Business Machines CorporationDriver circuits
Cooperative ClassificationA61B17/02