US3756227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency traction splint
Assignee: Individual
•
Filing: 1971-09-23
•
Granted: 1973-09-04
•
Expires: 1991-09-23
Abstract
Abstract Traction splint to maintain alignment of leg with fractured long bone. Splint has telescoping tubes, upper tube having crotch piece to locate end of splint against perineum, and lower tube, slidable within upper tube for splint length adjustment. Harness to fit around ankle of fractured leg is secured to one end of cable, opposite end of cable secured to spring secured to lower tube. Lower tube has pulley at lower end for cable, so as to reverse tension of spring to apply traction to leg. Cable is engaged with pulley so as to prevent slippage and circumferential graduations on pulley read in conjunction with index indicates traction on leg. Stop means limits rotation of pulley above maximum design traction.
Inventors
- 👤 J Sager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/04; A61F5/05; A61F5/058; A61F5/05841; A61F5/0585
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
317 words
A traction splint to maintain alignment by traction of a fractured leg of a patient for temporary therapy, the splint having upper and lower ends and including: a. telescoping upper and lower tubes, the tubes being extensible and retractable to permit change in length of the splint, and restricted against relative rotation, the tubes having a releasable locking means to lock the tubes axially, b. a crotch piece at the upper end of the splint to locate the upper end of the splint relative to the crotch, the crotch piece having a strap to hold the upper end of the splint against an upper portion of the leg so that the crotch piece is held against the tuberosity of the ischium and the perineum, c. a flexible tension link having outer and inner ends, the outer end of the link having a harness to fit around the ankle, the inner end of the link having a resiliently extensible member having one end secured thereto, an opposite end of the resiliently extensible member being secured adjacent the lower end of the splint, d. tension reversing means at the lower end of the splint, which means are complementary to and engaged by the flexible tension link so that the flexible tension link is located relative to the tension reversing means to prevent slippage therebetween, the tension reversing means having peripherally spaced graduations and an index adjacent the reversing means for reading the graduations, so that when the crotch piece is held against the upper end of the leg by the strap and is urged against the perineum, tension in the flexible tension link arising from extension of the resiliently extensible member is reversed by the tension reversing means to apply traction to the leg tending to maintain the leg in alignment, the tension in the flexible tension link being measured by sighting the graduations in combination with the index.
Claim 2
Dependent Claim
317 words
A traction splint to maintain alignment by traction of a fractured leg of a patient for temporary therapy, the splint having upper and lower ends and including: a. telescoping upper and lower tubes, the tubes being extensible and retractable to permit change in length of the splint, and restricted against relative rotation, the tubes having a releasable locking means to lock the tubes axially, b. a crotch piece at the upper end of the splint to locate the upper end of the splint relative to the crotch, the crotch piece having a strap to hold the upper end of the splint against an upper portion of the leg so that the crotch piece is held against the tuberosity of the ischium and the perineum, c. a flexible tension link having outer and inner ends, the outer end of the link having a harness to fit around the ankle, the inner end of the link having a resiliently extensible member having one end secured thereto, an opposite end of the resiliently extensible member being secured adjacent the lower end of the splint, d. tension reversing means at the lower end of the splint, which means are complementary to and engaged by the flexible tension link so that the flexible tension link is located relative to the tension reversing means to prevent slippage therebetween, the tension reversing means having peripherally spaced graduations and an index adjacent the reversing means for reading the graduations, so that when the crotch piece is held against the upper end of the leg by the strap and is urged against the perineum, tension in the flexible tension link arising from extension of the resiliently extensible member is reversed by the tension reversing means to apply traction to the leg tending to maintain the leg in alignment, the tension in the flexible tension link being measured by sighting the graduations in combination with the index.
Claim 3
Dependent Claim
35 words
A traction splint as claimed in claim 1 wherein i. the upper and lower tubes have complementary square cross sections to prevent rotation of one tube relative to the other whilst maintaining relative axial sliding.
Claim 4
Dependent Claim
77 words
A traction splint as defined in claim 1 in which: i. the flexible tension link is a cable, ii. the tension reversing means is a pulley, iii. a sleeve is secured to and adjacent an end of the cable passing over the pulley, iv. the pulley has a groove and a recess adjacent the groove, the recess accepting the sleeve so as to prevent slipping between the pulley and the cable when the cable is in tension.
Claim 5
Dependent Claim
19 words
A traction splint as claimed in claim 1 wherein: i. the resiliently extensible member extends within the lower tube.
Claim 6
Dependent Claim
9 words
A traction splint as claimed in claim 1 wherein:
Claim 7
Dependent Claim
67 words
A traction splint as defined in claim 1, including: e. stop means adjacent the tension reversing means adapted to prevent further excessive rotation of the reversing means beyond maximum design traction, constructed and arranged so that maximum design traction to be applied to the leg is attained at traction less than that at which the reversing means is prevented from further rotation due to the stop means.
Claim 8
Dependent Claim
54 words
A traction splint as defined in claim 2 in which the stop means includes: i. an end of the flexible tension link, constructed and arranged so that the end interferes with the pulley and prevents further rotation of the pulley at a traction greater than maximum design traction to be applied to the leg.
Claim 9
Dependent Claim
57 words
A traction splint as defined in claim 1 in which the tension reversing means includes: i. a pulley, and the flexible tension link includes: ii. a cable, constructed and arranged so that the cable runs in the groove of the pulley and reverses tension in the flexible tension link arising from extension of the resiliently extensible member.
Claim 10
Dependent Claim
124 words
A traction splint as defined in claim 1 in which the releasable locking means includes: i. a spring-loaded plunger extending transversely across the inner tube, the plunger having a domed cap adapted to stand proud of the inner tube, ii. a series of spaced, longitudinally extending, aligned holes in the outer tube, one hole of which is adapted to be engaged by the domed cap at one time, constructed and arranged so that when the cap is urged outwards and engages one hole in the outer tube, the inner tube is locked relative to the outer tube, and when the cap is depressed to a lowered position the inner tube can be slid relative to the outer tube to change length of the splint.
Claim 11
Dependent Claim
51 words
A traction splint as defined in claim 1 in which the index includes: i. a hood partially enclosing the tension reversing means, ii. the hood having an upper edge adjacent a portion of the reversing means so as to serve as an index for reading graduations on the tension reversing means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |