US3911952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for controlled air delivery to an air operated rotary body
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1974-06-03
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Granted: 1975-10-14
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Expires: 1994-06-03
Abstract
Abstract A fluid-operated apparatus includes a rotary member integral with the fluid-operated rotary body in a stationary member adjacent thereto in end face confronting position with respect to the rotary member. A pair of circumferential grooves within the end face of the stationary member carry respectively, an annular sealing piston for controlling check valve actuation within the rotary member and an annular sealing piston for controlling ventilation of the fluid-operated rotary body by opening the check valve. Fluid passage project through the annular piston and communicate to the end face of the rotary member. The rotary member is provided with check valves within passages corresponding to the passages within the actuator annular piston for controlled supply of compressed fluid to the fluid-operated rotary body. The bores within the rotary member which carry the check valves and form a portion of the fluid passage leading from the stationary member to the fluid-operated rotary body and carry ventilation control pistons operatively disposed with respect to the check valves which ventilate pistons are fluid connected by passages within the rotary member leading to the annular pistons within the stationary member permitting selective ventilation of the fluid-operated rotary body by applying fluid pressure to the ventilation pistons.
Inventors
- 👤 Eisuke Sugahara
- 👤 Yusaku Yagi
- 👤 Akihito Owada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:06
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0812; F16L27/082; B; B63; B63H; B63H23/00; B63H23/30; F16D; F16D25/00; F16D25/04; F16D25/042; H; H10; H10P; H10P95/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86268
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
239 words
A fluid-operated apparatus comprising: a rotary fluid-operated body, a rotary member, and a stationary member, said rotary member and said stationary member having axial confronting end faces, said stationary member being provided with first and second circumferential grooves on the end face thereof facing the opposed end face of said rotary member, first and second annular pistons positioned within respective grooves, means for supplying pressurized fluid to said grooves for forcing said pistons towards said rotary member end face, passages within said pistons at spaced circumferential positions and in fluid communication with said fluid supply means, said rotary member including first fluid passage means leading from said rotary member end face and in alignment with the passages within the pistons within one of said grooves of said stationary member, said fluid passage means leading to said rotary fluid-operated body, check valves within said rotary member first fluid passage means, annular ventilation pistons carried by said rotary member and operatively positioned respectively with respect to said check valves, and second fluid passage means within said rotary member opening onto said end face in alignment with the fluid passage of said other annular piston within said stationary member and being operatively coupled to said ventilation pistons, whereby; selective delivery of pressurized fluid by way of said first and second annular pistons within said stationary member causes fluid pressure to be applied to said rotary fluidoperated body or to be relieved therefrom.
Claim 2
Dependent Claim
239 words
A fluid-operated apparatus comprising: a rotary fluid-operated body, a rotary member, and a stationary member, said rotary member and said stationary member having axial confronting end faces, said stationary member being provided with first and second circumferential grooves on the end face thereof facing the opposed end face of said rotary member, first and second annular pistons positioned within respective grooves, means for supplying pressurized fluid to said grooves for forcing said pistons towards said rotary member end face, passages within said pistons at spaced circumferential positions and in fluid communication with said fluid supply means, said rotary member including first fluid passage means leading from said rotary member end face and in alignment with the passages within the pistons within one of said grooves of said stationary member, said fluid passage means leading to said rotary fluid-operated body, check valves within said rotary member first fluid passage means, annular ventilation pistons carried by said rotary member and operatively positioned respectively with respect to said check valves, and second fluid passage means within said rotary member opening onto said end face in alignment with the fluid passage of said other annular piston within said stationary member and being operatively coupled to said ventilation pistons, whereby; selective delivery of pressurized fluid by way of said first and second annular pistons within said stationary member causes fluid pressure to be applied to said rotary fluidoperated body or to be relieved therefrom.
Claim 3
Dependent Claim
19 words
The fluid-operated apparatus as claimed in claim 1, wherein said rotary member is integral with said fluid-operated rotary body.
Claim 4
Dependent Claim
42 words
The fluid-operated apparatus as claimed in claim 2, wherein said rotary fluid-operated body and said rotary member are fixed to a common shaft and said shaft includes fluid passage means therein for indirectly communicating said fluid operated body to said rotary member.
Claim 5
Dependent Claim
85 words
The fluid-operated apparatus as claimed in claim 1, wherein said first and second circumferential grooves within the end face of said stationary member and the rear face of said annular pistons define fluid chambers which receive said pressurized fluid from said supply means for direct forcing said pistons towards said rotating member, and said passages within said pistons extend therethrough and are in direct fluid communication with said chamber for supplying pressurized fluid directly to said fluid operated body by way of said check valves.
Claim 6
Dependent Claim
51 words
The fluid-operated apparatus as claimed in claim 1, wherein separate sources of Pressurized fluid are supplied to the passages within said annular piston leading to said rotary member to said grooves and acting on said end faces of said pistons to force said pistons into sealing engagement with said rotary member.
Claim 7
Dependent Claim
70 words
The fluid-operated apparatus as claimed in claim 5, wherein each annular piston of said stationary member includes a circumferential groove within the end face facing said stationary member, and a sintered carbon ring is positioned within said circumferential groove with said sintered carbon ring being apertured at circumferentially spaced positions corresponding to the fluid passages extending within said annular piston and being fluid coupled to said fluid pressure supply means.
References Cited (Backward Citations)
US2242184A
Cited
US3598147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |