Patient securing device
First Claim
1. In a device for securing a patient to an examination table including an examination table, a belt for extending between the sides of the table over the top of the table and holder mechanisms including base means attached to the table adjacent each side thereof with the belt passing between the holder mechanisms, and means for tensioning the belt, the improvement of one of the holders being equipped with a freewheeling roller around which the belt passes, and a second holder having a slower revolvable take-up drum and a faster revolvable take-up drum mounted therein in parallel relationship to one another, said slower revolvable drum being mounted closest to said base means opposite ends of the belt being attached one end respectively to one drum and the other end respectively to the other drum, the belt passing around the freewheeling roller, selectively actuatable means or revolving the drums simultaneously including gear means on each drum for revolving the drums together at different relative rotational speeds whereby, the belt, when passed around the freewheeling roller having a lower stretch extending from a slower revolving drum across the examination table, closest to the surface of the examination table and another stretch passing across the examination table above the first mentioned stretch the other stretch attached to a faster revolving drum.
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Accused Products
Abstract
A hold-down device particularly for use in securing patients to examination tables and the like. The device includes mounting member for attachment to opposite sides of the examination table, one of the mounting members having first and second actuatable take-up drums controlled by a rachet connected handle, a belt is past from the first take-up drum across the patient to the other holder and around a free wheeling roll in that holder and back across the patient to the second take-up drum. The rolls are geared such that the second take-up drum revolves three times faster than the first take-up drum.
49 Citations
14 Claims
- 1. In a device for securing a patient to an examination table including an examination table, a belt for extending between the sides of the table over the top of the table and holder mechanisms including base means attached to the table adjacent each side thereof with the belt passing between the holder mechanisms, and means for tensioning the belt, the improvement of one of the holders being equipped with a freewheeling roller around which the belt passes, and a second holder having a slower revolvable take-up drum and a faster revolvable take-up drum mounted therein in parallel relationship to one another, said slower revolvable drum being mounted closest to said base means opposite ends of the belt being attached one end respectively to one drum and the other end respectively to the other drum, the belt passing around the freewheeling roller, selectively actuatable means or revolving the drums simultaneously including gear means on each drum for revolving the drums together at different relative rotational speeds whereby, the belt, when passed around the freewheeling roller having a lower stretch extending from a slower revolving drum across the examination table, closest to the surface of the examination table and another stretch passing across the examination table above the first mentioned stretch the other stretch attached to a faster revolving drum.
- 4. The device according to claim 4 wherein the rachet wheel has associated therewith a spring loaded locking pawl pivotally mounted on said second holder in an aligned position relative to said rachet wheel, spring means biasing said locking pawl into locking engagement with the rachet wheel, a release mechanism for said locking pawl, said release mechanism including a first projection mounted on the drive member in radial alignment with said locking pawl and a second projection mounted on the second holder in radial alignment with said rachet pawl, the drive member and first projection being revolvable with respect to the locking pawl, whereby the projections are engageable with the locking pawl and rachet pawl upon rotation of the drive member to pivot the locking pawl and rachet pawl against the respective spring means and out of contact with the rachet wheel.
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9. The method of securing a patient to an examination table which comprises the steps of placing a patient on the examination table, attaching holder mechanisms to opposite sides of the examination table, passing a belt between said holders with a first stretch of the belt passing from a tension holder across the patient and in engagement therewith to a freewheeling roller carried by the other of said holders, a second stretch of the belt extending from the freewheeling roller across the said patient on top of the first stretch to the said tension holder, attaching opposite free ends of the belt to rotatable take-up drums in said tension holder, gearing the take-up drums such that one of the drums rotates faster than the other of the drums, securing the end of the belt associated with the first stretch to the slower of the take-up drums, attaching the end of the belt associated with the second stretch to the faster of the take-up drums, and rotating said drums in opposite directions whereby both ends of the belt will be wrapped around their respective take-up drums at different rates of speed such that the stretch of belt in contact with the patient will be drawn simultaneously towards both sides of the examination table in a manner to produce a compressive force on the patient which is substantially perpendicular to the examination table.
- 10. A tensioning holder for use in association with patient securing systems comprising a housing member, a pair of take-up drums rotatably mounted in said housing member, said take-up drums positioned in parallel relation to one another, a patient holddown web extending between said drums and having ends attached to the drums, gear means gearing said take-up drums together for simultaneous rotation, said gear means having a ratio of other than 1 to 1 whereby one of said take-up drums will be revolved slower than the other of said take-up drums, a shaft extension on one of said take-up drums, a rachet wheel affixed to said shaft for rotation therewith, a hand grip rotatably mounted on said shaft in spaced relation to said rachet wheel, a rachet pawl carried by said hand grip, spring means urging the rachet pawl into contact with the rachet wheel, the rachet pawl having a driving face opposed to a driven face on the rachet wheel when in contact with the wheel, the rachet pawl being pivotable on said hand grip whereby movement of the hand grip in a first circumferential direction will drive the rachet wheel and its associated shaft in said first direction by engagement with the rachet pawl.
Specification