Patent US3399505A successfully refreshed from Google Patents.
Patent US3839180A successfully refreshed from Google Patents.
US3839180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for chromium plating
Assignee: TAWKYSU K
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Filing: 1973-01-29
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Granted: 1974-10-01
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Expires: 1993-01-29
Abstract
Abstract Chromium plating apparatus comprising a main tank carrying the electrodes and an auxiliary tank adjacent the main tank and having fluid connections therewith. The electrolyte is adapted to be circulated between tanks with filtering, pumping and temperature control being effected in the auxiliary tank while plating is effected in the main tank. The main tank has platinum plated anode means which substantially decrease sludge formation during plating.
Inventors
- 👤 K Takaysu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:53
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
254 words
A device for chromium plating, comprising, a main tank for carrying electrolyte containing chromium ions; at least one anode adapted to be disposed in the electrolyte of the main tank and comprising at least one platinum plated corrugated plate made of a metal selected from the group consisting of niobium and titanium; cathode bus means adapted to be disposed above the electrolyte and arranged to carry workpieces to be chromium plated and further adapted to provide for immersing the said workpieces in said electrolyte when the said main tank is properly filled with electrolyte whereby to enable such workpieces to serve as counterelectrode means; an auxiliary tank disposed adjacent the main tank; a siphon connected between tanks and adapted to transfer electrolyte from said main tank to said auxiliary tank; heat exchanger means disposed in the auxiliary tank for heating and cooling electrolyte which may be carried therein; a filter disposed in said auxiliary tank; pump means disposed in said auxiliary tank and arranged for forcibly recirculating the electrolyte through the tanks through said filter and having intake and discharge sides; and pipe means extending from said discharge side of said pump means to the bottom of said main tank at a location below said cathode bus means, said pipe means having passageways therein arranged to direct the electrolyte from the pump means toward said cathode bus means, whereby in operation the electrolyte discharge from said pump means acts to agitate the electrolyte in the proximity of workpieces suspended from the cathode bus means.
Claim 2
Independent Claim
254 words
A device for chromium plating, comprising, a main tank for carrying electrolyte containing chromium ions; at least one anode adapted to be disposed in the electrolyte of the main tank and comprising at least one platinum plated corrugated plate made of a metal selected from the group consisting of niobium and titanium; cathode bus means adapted to be disposed above the electrolyte and arranged to carry workpieces to be chromium plated and further adapted to provide for immersing the said workpieces in said electrolyte when the said main tank is properly filled with electrolyte whereby to enable such workpieces to serve as counterelectrode means; an auxiliary tank disposed adjacent the main tank; a siphon connected between tanks and adapted to transfer electrolyte from said main tank to said auxiliary tank; heat exchanger means disposed in the auxiliary tank for heating and cooling electrolyte which may be carried therein; a filter disposed in said auxiliary tank; pump means disposed in said auxiliary tank and arranged for forcibly recirculating the electrolyte through the tanks through said filter and having intake and discharge sides; and pipe means extending from said discharge side of said pump means to the bottom of said main tank at a location below said cathode bus means, said pipe means having passageways therein arranged to direct the electrolyte from the pump means toward said cathode bus means, whereby in operation the electrolyte discharge from said pump means acts to agitate the electrolyte in the proximity of workpieces suspended from the cathode bus means.
Claim 3
Dependent Claim
17 words
A device according to claim 1, wherein said heat exchanger means includes an immersion type electric heater.
Claim 4
Dependent Claim
64 words
A device according to claim 2 and further comprising a thermometer disposed in the electrolyte of said main tank, a control panel mounted on said auxiliary tank and having electric switching means, and a control cable connecting said switching means to said thermometer and to said electric heater, whereby said electric heater is so controlled as to keep the electrolyte at a predetermined temperature.
Claim 5
Dependent Claim
29 words
A device according to claim 1, wherein said auxiliary tank has a partition wall defining two chambers therein, and said filter being housed in one of the two chambers.
Claim 6
Dependent Claim
19 words
A device according to claim 1, wherein said filter is disposed at the intake side of said pump means.
Claim 7
Dependent Claim
19 words
A device according to claim 1, wHerein said filter is disposed at the discharge side of the pump means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |