Patent US3578774A successfully refreshed from Google Patents.
US3578774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urological endoscopic irrigation machine
Assignee: Individual
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Filing: 1969-08-07
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Granted: 1971-05-18
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Expires: 1989-08-07
Abstract
Abstract A urological endoscopic irrigation machine which consists of a cabinet for holding tank of irrigation fluid which is pumped through a tube into a reservoir bag at an elevated height. A membrane filter is connected on the input of the bag to filter out bacteria from the irrigant pumped from the tank. The bag is supported from a weight-sensitive switch which is responsive to the weight of the bag and its contents so that, as the fluid level in the bag drops, the weight-sensitive switch will automatically operate the pump to refill the bag to a predetermined level so as to maintain its constant supply of irrigation fluid for the patient.
Inventors
- 👤 Harold P Mcdonald Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:19
CPC Classifications
A; A61; A61M; A61M3/00; A61M3/02; A61M3/0233; A61M3/0241; A61M3/0202; A61M3/0245; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
An irrigation apparatus for dispensing fluid to an endoscopic instrument comprising; receptacle tank means for storing a quantity of the fluid, reservoir container means for holding a measured quantity of the fluid, means for maintaining said reservoir container at an elevated height above said receptacle tank, weight-sensitive switch means for securing said reservoir container to said maintaining means, pump means connected to a source of power with said switch means interposed between said pump and said source of power whereby actuation of said switch means transfers quantities of fluid from said receptacle tank to said reservoir container, membrane filter means secured on the input of said container means and connected to the output of said pump and an endoscopic instrument connected to the output of said container means.
Claim 2
Dependent Claim
128 words
An irrigation apparatus for dispensing fluid to an endoscopic instrument comprising; receptacle tank means for storing a quantity of the fluid, reservoir container means for holding a measured quantity of the fluid, means for maintaining said reservoir container at an elevated height above said receptacle tank, weight-sensitive switch means for securing said reservoir container to said maintaining means, pump means connected to a source of power with said switch means interposed between said pump and said source of power whereby actuation of said switch means transfers quantities of fluid from said receptacle tank to said reservoir container, membrane filter means secured on the input of said container means and connected to the output of said pump and an endoscopic instrument connected to the output of said container means.
Claim 3
Dependent Claim
26 words
The apparatus as recited in claim 1 wherein said receptacle tank means additionally comprises a plastic liner for completely covering the internal walls of the tank.
Claim 4
Dependent Claim
16 words
The apparatus as recited in claim 1 wherein said filter means comprises a sterilizing Millipore filter.
Claim 5
Dependent Claim
25 words
The apparatus as recited in claim 3 wherein said Millipore filter comprises a hydrophobic rim surrounding said filter for removing the air from the fluid.
Claim 6
Dependent Claim
24 words
The apparatus as recited in claim 1 wherein said maintaining means comprises an adjustable vertical support member secured adjacent to said receptacle tank means.
Claim 7
Dependent Claim
20 words
The apparatus as recited in claim 5 wherein said reservoir container means comprises a disposable bag for replacement after use.
Claim 8
Dependent Claim
31 words
The apparatus as recited in claim 1 additionally comprising a portable cabinet for containing said receptacle tank means, said pump means, and for mounting said maintaining means in a vertical position.
Claim 9
Dependent Claim
72 words
The apparatus as recited in claim 1 wherein said pump means comprises; a motor, a rotor connected to the output of said motor, rollers pivotably connected to the arms of said rotor, and a tube connected between said tank means and said container means and in compressible contact with said rollers so that the movement of said rollers over said tube advances the fluid from said tank means to said container 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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |