US3845946A — Medical device with hydraulically movable parts

Claim 1

Independent Claim 253 words

A medical device, comprising a plate for the patient, a casing, a frame pivotally connected with said casing and supporting said plate, at least one hydraulic member connected with said frame for swinging said frame, another hydraulic member connected with said casing for vertically moving at least a paRt of said casing, at least one third hydraulic member connected with said plate for longitudinally moving said plate, a plurality of instrumental valves, means operatively connecting one of said instrumental valves with the first-mentioned hydraulic member, means operatively connecting another one of said instrumental valves with the second-mentioned hydraulic member, means operatively connecting a third one of said instrumental valves with the third-mentioned hydraulic member, a central steering device comprising a plurality of interconnected steering members, and separate pressure keys connected with separate steering members; a compressed air container connected with all steering members, means operatively connecting one of said steering members with the first-mentioned instrumental valve, means operatively connecting another one of said steering members with the second-mentioned instrumental valve, means operatively connecting a third one of said steering members with the thirdmentioned instrumental valve, whereby said instrumental valves are actuated by gas from said compressed air container, a plurality of positioning valves connected to a steering member, a separate positioning valve being connected in parallel with a separate instrumental valve, and a plurality of lugs, a separate lug being connected with each positioning valve for operating that valve, said lugs switching off said positioning valves in a predetermined position of said plate.

Claim 2

Dependent Claim 253 words

A medical device, comprising a plate for the patient, a casing, a frame pivotally connected with said casing and supporting said plate, at least one hydraulic member connected with said frame for swinging said frame, another hydraulic member connected with said casing for vertically moving at least a paRt of said casing, at least one third hydraulic member connected with said plate for longitudinally moving said plate, a plurality of instrumental valves, means operatively connecting one of said instrumental valves with the first-mentioned hydraulic member, means operatively connecting another one of said instrumental valves with the second-mentioned hydraulic member, means operatively connecting a third one of said instrumental valves with the third-mentioned hydraulic member, a central steering device comprising a plurality of interconnected steering members, and separate pressure keys connected with separate steering members; a compressed air container connected with all steering members, means operatively connecting one of said steering members with the first-mentioned instrumental valve, means operatively connecting another one of said steering members with the second-mentioned instrumental valve, means operatively connecting a third one of said steering members with the thirdmentioned instrumental valve, whereby said instrumental valves are actuated by gas from said compressed air container, a plurality of positioning valves connected to a steering member, a separate positioning valve being connected in parallel with a separate instrumental valve, and a plurality of lugs, a separate lug being connected with each positioning valve for operating that valve, said lugs switching off said positioning valves in a predetermined position of said plate.

Claim 3

Dependent Claim 45 words

A device according to claim 1, wherein means connecting at least two of said positioning valves to the instrumental valves are also connected to at least two steering members to maintain the two positioning valves on opposite sides of the basic position of said frame.

Claim 4

Dependent Claim 33 words

A device according to claim 2, comprising means connected with one of said steering members and said third-mentioned instrumental valve for short-circuiting the third-mentioned instrumental valve to permit hand movement of said plate.

Claim 5

Dependent Claim 42 words

A device in accordance with claim 3, wherein the last-mentioned means include an auxiliary valve and conduits connected with said valve and with opposed sides of the third hydraulic member, said opposed sides being separated by the piston of said hydraulic member.

Claim 6

Dependent Claim 84 words

A device in accordance with claim 4, wherein means connecting the second-mentioned hydraulic member with the second-mentioned instrumental valve comprise an overpressure switch, an overpressure valve connected with said overpressure switch, and means connected with said overpressure switch and actuating it depending upon the pressure exerted by the weight of said plate, said overpressure switch actuating said overpressure valve only when this pressure is present, whereupon said overpressure valve will permit opening of the second-mentioned instrumental valve for the vertical movement of said casing.

Claim 7

Dependent Claim 55 words

A device in accordance with claim 4, wherein said frame comprises supports engaging said plate, a separate safety valve connected with each support, and means connecting said safety valves with the second-mentioned instrumental valve, said safety valves opening the second-mentioned instrumental valve to permit movement of said plate only when said plate is properly mounted.

Claim 8

Dependent Claim 117 words

A device in accordance with claim 1, having a hydraulic system comprising an oil pump, a compressed air motor driving said pump, a coupling rod connected with said motor, a piston connected with said coupling rod, a pressure amplifier connected with said piston, a valve unit comprising a plurality of valves interconnected in series and including a central valve connected with said pressure amplifier, and means connecting other valves of said plurality of valves with means connecting the first-mentioned, the second-mentioned and the third-mentioned steering members with the first-mentioned, second-mentioned and third-mentioned instrumental valves, whereby said motor is actuated when one of the steering members is actuated, said motor being switched off when the movement is Terminated.

Claim 9

Dependent Claim 64 words

A device in accordance with claim 1, wherein said casing is box-shaped and consists of two parts, one of said parts being fixed, the second-mentioned hydraulic member being located within said casing and connected with both parts of the casing, the other one of said parts carrying said frame, the second-mentioned hydraulic member moving said other part substantially vertically relatively to said one part.

Claim 10

Dependent Claim 87 words

A device in accordance with claim 8, wherein said two parts of the casing are divided along short diagonal edges, two parallel struts located within said casing and extending through both parts in diagonal directions substantially opposed to the direction of said diagonal edges, and pins mounted on both ends of each of said struts and fixed to the casing, the second-mentioned hydraulic member having opposite ends carried by two of said pins which are closest to each other and fixed to different parts of the casing.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-11-04	1978-05-06	1978-11-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-11-04	1982-05-06	1982-11-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-11-04	1986-05-06	1986-11-05	$7700.00	Window Closed / Lapsed

Medical device with hydraulically movable parts

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag