Surgery – Truss – Perineal
Patent
1990-07-06
1991-12-24
Hafer, Robert A.
Surgery
Truss
Perineal
128 71, 128845, 128 78, A61F 500
Patent
active
050742876
ABSTRACT:
A traction fulcrum arm is pivoted intermediate its ends on a support post and carries at one end a head halter tending to lift up on the patient's head in response to weights on the opposite end of the arm tending to pivot the arm downwardly. A motorized cam intermittently raises the weight end of the arm relieving the traction on the patient on a cyclical basis of 10 to 40 seconds. An an alternative to using the weights, a spring may be connected between the fulcrum arm and the frame to produce tractive forces. The desired angle of 45 degrees traction may be obtained through adjustment of the post vertically and the head halter carried on the arm while also adjusting the positioning of the chair towards and away from the head halter. The support post may also be pivoted away from the person in the chair for access in and out of the chair.
REFERENCES:
patent: 2658506 (1953-11-01), Haskell
patent: 2808049 (1957-10-01), Graham
patent: 2984238 (1961-05-01), Axtell et al.
patent: 3068859 (1962-12-01), Treutelaar
patent: 3145709 (1964-08-01), Pinegar
patent: 3168094 (1965-02-01), Siltamaki
patent: 3346256 (1967-10-01), White
patent: 3659594 (1972-05-01), Schwab
patent: 3750658 (1973-08-01), Dawson, Jr. et al.
patent: 3768464 (1973-10-01), Greissing
Hafer Robert A.
Hanlon Brian E.
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