US3716171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airless hydraulic system supply
Assignee: Tuxco Corp
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Filing: 1971-02-19
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Granted: 1973-02-13
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Expires: 1991-02-19
Abstract
Abstract A brake fluid supply vessel with a pressurizable expansible bladder therein for expelling fluid through the bottom of the vessel. Vents communicate with the bladder and the tank around the bladder to allow exhaustion of air therefrom.
Inventors
- 👤 Sr O Blomgren
- 👤 Jr O Blomgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:43
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/221; B60T17/222
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
206 words
A hydraulic system supply vessel for supplying air free hydraulic fluid to a hydraulic system, including a tank adapted to contain a supply of hydraulic fluid, said tank having an outlet opening formed in a bottom wall thereof, said opening including a fitting adapted to be coupled to a hydraulic fluid supply line, said tank having an access opening in the top wall thereof with a closure fitted within the opening and sealed to the wall of said tank around said opening, an air inlet fitting formed in said closure and an expansible hollow bladder carried by said closure within said tank and coupled to said air inlet fitting, the interior of said bladder being in communication solely with said air inlet fitting, said closure having a normally closed filler opening therein for filling said tank with hydraulic fluid, said air inlet adapted to be coupled to a source of air pressure whereby air may expand said bladder against a volume of fluid within said tank and force fluid out of said outlet opening, and a flexible disc of elastomeric material formed around said air inlet fitting above said bladder and underlying said closure, said disc having an area greater than the area of said closure.
Claim 2
Dependent Claim
206 words
A hydraulic system supply vessel for supplying air free hydraulic fluid to a hydraulic system, including a tank adapted to contain a supply of hydraulic fluid, said tank having an outlet opening formed in a bottom wall thereof, said opening including a fitting adapted to be coupled to a hydraulic fluid supply line, said tank having an access opening in the top wall thereof with a closure fitted within the opening and sealed to the wall of said tank around said opening, an air inlet fitting formed in said closure and an expansible hollow bladder carried by said closure within said tank and coupled to said air inlet fitting, the interior of said bladder being in communication solely with said air inlet fitting, said closure having a normally closed filler opening therein for filling said tank with hydraulic fluid, said air inlet adapted to be coupled to a source of air pressure whereby air may expand said bladder against a volume of fluid within said tank and force fluid out of said outlet opening, and a flexible disc of elastomeric material formed around said air inlet fitting above said bladder and underlying said closure, said disc having an area greater than the area of said closure.
Claim 3
Dependent Claim
206 words
A hydraulic system supply vessel for supplying air free hydraulic fluid to a hydraulic system, including a tank adapted to contain a supply of hydraulic fluid, said tank having an outlet opening formed in a bottom wall thereof, said opening including a fitting adapted to be coupled to a hydraulic fluid supply line, said tank having an access opening in the top wall thereof with a closure fitted within the opening and sealed to the wall of said tank around said opening, an air inlet fitting formed in said closure and an expansible hollow bladder carried by said closure within said tank and coupled to said air inlet fitting, the interior of said bladder being in communication solely with said air inlet fitting, said closure having a normally closed filler opening therein for filling said tank with hydraulic fluid, said air inlet adapted to be coupled to a source of air pressure whereby air may expand said bladder against a volume of fluid within said tank and force fluid out of said outlet opening, and a flexible disc of elastomeric material formed around said air inlet fitting above said bladder and underlying said closure, said disc having an area greater than the area of said closure.
Claim 4
Dependent Claim
206 words
A hydraulic system supply vessel for supplying air free hydraulic fluid to a hydraulic system, including a tank adapted to contain a supply of hydraulic fluid, said tank having an outlet opening formed in a bottom wall thereof, said opening including a fitting adapted to be coupled to a hydraulic fluid supply line, said tank having an access opening in the top wall thereof with a closure fitted within the opening and sealed to the wall of said tank around said opening, an air inlet fitting formed in said closure and an expansible hollow bladder carried by said closure within said tank and coupled to said air inlet fitting, the interior of said bladder being in communication solely with said air inlet fitting, said closure having a normally closed filler opening therein for filling said tank with hydraulic fluid, said air inlet adapted to be coupled to a source of air pressure whereby air may expand said bladder against a volume of fluid within said tank and force fluid out of said outlet opening, and a flexible disc of elastomeric material formed around said air inlet fitting above said bladder and underlying said closure, said disc having an area greater than the area of said closure.
Claim 5
Dependent Claim
46 words
The structure of claim 1 wherein said bladder has a generally inverted cup-shaped form in the unexpanded condition thereof and has a size such as to be expanded into a generally cylindrical form of a volume comprising a substantial portion of the volume of said tank.
Claim 6
Dependent Claim
48 words
The structure of claim 1 wherein said filler opening includes a closure cap therefor, said cap having an air inlet fitting for the purpose of pressurizing the interior of the tank with air in the absence of fluid to force said bladder into its unexpanded, inverted, cup-shaped form.
Claim 7
Dependent Claim
30 words
The structure of claim 1 wherein said closure includes a manually actuated valve to allow release of air and fluid through said closure when said tank is filled with fluid.
Claim 8
Dependent Claim
47 words
The structure of claim 1 wherein said air inlet fitting has a bore therein and said closure carries a pressure relief valve, a normally closed, manually actuated vent valve and a normally closed air inlet valve communicating with said bore at a location exterior to said tank.
Claim 9
Dependent Claim
83 words
The structure of claim 1 wherein said closure is defined by a plate adapted to be received within an access opening of matching configuration in the top wall of the tank, the area of said plate being larger than the area of said access opening and being shaped so that the said plate may be received through said access opening with the marginal area thereof underlying the marginal area of said tank around said access opening, and sealing means between said marginal areas.
Claim 10
Dependent Claim
75 words
The structure of claim 1 wherein said outlet opening in said tank is formed through an upwardly convex element positioned above the lower wall of said tank, said element having a central bore communicating with said fitting, said element having a reduced portion underlying said upwardly concave part, said reduced portion having passage means therein and communicating with said bore to allow flow of fluid from said tank and through said bore into said fitting.
Claim 11
Dependent Claim
22 words
The structure of claim 7 wherein said bladder is adapted upon expansion thereof to move against said upwardly concave part and therearound.
Claim 12
Dependent Claim
189 words
A liquid supply vessel for supplying air free liquid through a supply hose, including a tank adapted to contain a supply of liquid, said tank having an outlet opening formed in a bottom wall thereof, said opening including a fitting adapted to be coupled to a liquid supply hose, said tank including means for developing pressure therein against a volume of liquid therein for expelling liquid through said opening, said tank having a plurality of support rods spaced around said tank and fixed to the wall thereof, the major portion of the length of each rod extending generally vertically, the uppermost portions of each rod being offset outwardly from the wall of said tank to define a hose receiving storage area between the wall of the tank and said portions, the lower ends of a pair of said rods being extended laterally outwardly from said tank in alignment with one another, and support wheels rotatably carried on said lower laterally extended portions of said pair of rods. 10 The structure of claim 9 wherein a rod other than said pair includes a laterally offset portion serving as a stand.
Claim 13
Dependent Claim
186 words
A hydraulic system supply vessel for supplying air free fluid to an hydraulic system, including a tank adapted to contain a supply of hydraulic fluid, said tank having an outlet opening formed in the bottom wall thereof, said opening including a fitting adapted to be coupled to a hydraulic fluid supply line, said tank having an air fitting and a filler fitting in the wall thereof, an expansible hollow air bladder within said tank and coupled to said air fitting, the interior of said bladder being in communication solely with said air inlet fitting, said filler fitting including a normally closed air inlet valve to provide a pressurized condition in the fluid volume of said tank around said bladder, said tank including a normally closed and manually operated vent valve communicating with the fluid volume of said tank around said bladder, said air inlet fitting including a normally closed and manually actuated vent valve adapted to communicate the interior of said bladder to the atmosphere, said air inlet fitting including a normally closed air inlet valve providing a means for pressurizing the interior of said bladder.
Claim 14
Dependent Claim
186 words
A hydraulic system supply vessel for supplying air free fluid to an hydraulic system, including a tank adapted to contain a supply of hydraulic fluid, said tank having an outlet opening formed in the bottom wall thereof, said opening including a fitting adapted to be coupled to a hydraulic fluid supply line, said tank having an air fitting and a filler fitting in the wall thereof, an expansible hollow air bladder within said tank and coupled to said air fitting, the interior of said bladder being in communication solely with said air inlet fitting, said filler fitting including a normally closed air inlet valve to provide a pressurized condition in the fluid volume of said tank around said bladder, said tank including a normally closed and manually operated vent valve communicating with the fluid volume of said tank around said bladder, said air inlet fitting including a normally closed and manually actuated vent valve adapted to communicate the interior of said bladder to the atmosphere, said air inlet fitting including a normally closed air inlet valve providing a means for pressurizing the interior of said bladder.
Claim 15
Dependent Claim
23 words
The structure of claim 11 wherein said air inlet fitting includes a pressure relief valve for limiting the maximum pressure within said bladder.
Claim 16
Dependent Claim
26 words
The structure of claim 11 wherein said bladder, fittings and valves are carried by a closure plate removably sealed across an access opening to said tank.
Claim 17
Dependent Claim
182 words
A liquid supply vessel for supplying air free liquid to a supply line, including a tank adapted to contain a liquid, said tank having an outlet opening formed in the bottom wall thereof, said opening including a fitting adapted to be coupled to a liquid supply line, said tank having an air fitting and a filler fitting in the wall thereof, an expansible hollow air bladder within said tank and coupled to said air fitting, the interior of said bladder being in communication solely with said air inlet fitting, said filler fitting including a normally closed air inlet valve to provide a pressurized condition in the fluid volume of said tank around said bladder, said tank including a normally closed and manually operated vent valve communicating with the fluid volume of said tank around said bladder, said air inlet fitting including a normally closed and manually actuated vent valve adapted to communicate the interior of said bladder to the atmosphere, said air inlet fitting also including a normally closed air inlet valve providing a means for pressurizing the interior of said bladder.
Claim 18
Dependent Claim
182 words
A liquid supply vessel for supplying air free liquid to a supply line, including a tank adapted to contain a liquid, said tank having an outlet opening formed in the bottom wall thereof, said opening including a fitting adapted to be coupled to a liquid supply line, said tank having an air fitting and a filler fitting in the wall thereof, an expansible hollow air bladder within said tank and coupled to said air fitting, the interior of said bladder being in communication solely with said air inlet fitting, said filler fitting including a normally closed air inlet valve to provide a pressurized condition in the fluid volume of said tank around said bladder, said tank including a normally closed and manually operated vent valve communicating with the fluid volume of said tank around said bladder, said air inlet fitting including a normally closed and manually actuated vent valve adapted to communicate the interior of said bladder to the atmosphere, said air inlet fitting also including a normally closed air inlet valve providing a means for pressurizing the interior of said bladder.
Claim 19
Dependent Claim
23 words
The structure of claim 14 wherein said air inlet fitting includes a pressure relief valve for limiting the maximum pressure within said bladder.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |