US5016586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling a throttle valve
Assignee: Hitachi Ltd
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Filing: 1989-11-20
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Granted: 1991-05-21
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Expires: 2009-11-20
Abstract
Abstract An apparatus for controlling a throttle valve comprises a motor for rotating a throttle valve so as to adjust the valve opening degree, a gearing disposed between the motor and the throttle valve for transmitting driving force of the motor to the throttle valve, and a return device serving to return the throttle valve to a regular set position thereof. The return device includes a tension spring.
Inventors
- 👤 Kazunori Imamura
- 👤 Yoshikazu Hoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:53
CPC Classifications
F; F02; F02D; F02D11/00; F02D11/04; F02D11/06; F02D11/10; F02D2011/101; F02D2011/102
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
An apparatus for controlling a throttle valve, comprising: a motor for rotating a throttle valve so as to adjust the valve opening degree; a gearing disposed between said motor and said throttle valve for transmitting driving force of said motor to said throttle valve; and a return means for serving to return said throttle valve to a regular set position thereof and including a tension spring, wherein said return means includes a first spring support portion provided on a gear secured to said throttle valve and a second spring support portion provided on a housing which envelopes said gearing so that said tension spring is stretched between said two spring support portions.
Claim 2
Independent Claim
112 words
An apparatus for controlling a throttle valve, comprising: a motor for rotating a throttle valve so as to adjust the valve opening degree; a gearing disposed between said motor and said throttle valve for transmitting driving force of said motor to said throttle valve; and a return means for serving to return said throttle valve to a regular set position thereof and including a tension spring, wherein said return means includes a first spring support portion provided on a gear secured to said throttle valve and a second spring support portion provided on a housing which envelopes said gearing so that said tension spring is stretched between said two spring support portions.
Claim 3
Dependent Claim
20 words
A throttle valve controlling apparatus according to claim 1, wherein at least one of said spring support portions is rotatable.
Claim 4
Dependent Claim
21 words
A throttle valve controlling apparatus according to claim 2, wherein said rotatable spring support portion is said first spring support portion.
Claim 5
Dependent Claim
55 words
A throttle valve controlling apparatus according to claim 1, wherein said first and second spring support portions are so arranged that the torque applied to said throttle valve by said tension spring has a maximum at a position of intermediate valve opening degree between a full-open position and a full-closed position of said throttle valve.
Claim 6
Dependent Claim
22 words
A throttle valve controlling apparatus according to claim 1, wherein said regular set position is a full-closed position of said throttle valve.
Claim 7
Dependent Claim
25 words
A throttle valve controlling apparatus according to claim 1, wherein said controlling apparatus is incorporated in an auxiliary throttle valve of a tandem throttle valve.
Claim 8
Dependent Claim
23 words
A throttle valve controlling apparatus according to claim 6, wherein said regular set position is a full-open position of said auxiliary throttle valve.
Claim 9
Independent Claim
108 words
An apparatus for controlling a throttle valve, comprising: a motor for rotating a throttle valve so as to adjust the valve opening degree; a gearing disposed between said motor and said throttle valve for transmitting driving force of said motor to said throttle valve; and a return means for serving to return said throttle valve to a regular set position thereof and including a tension spring, extending between support portions located so that the torque applied to said throttle valve by said tension spring has a maximum value at a position of intermediate valve opening degree between a full-open position and a full-closed position of said throttle valve.
Claim 10
Independent Claim
108 words
An apparatus for controlling a throttle valve, comprising: a motor for rotating a throttle valve so as to adjust the valve opening degree; a gearing disposed between said motor and said throttle valve for transmitting driving force of said motor to said throttle valve; and a return means for serving to return said throttle valve to a regular set position thereof and including a tension spring, extending between support portions located so that the torque applied to said throttle valve by said tension spring has a maximum value at a position of intermediate valve opening degree between a full-open position and a full-closed position of said throttle valve.
Claim 11
Dependent Claim
17 words
A throttle valve controlling apparatus according to claim 8, wherein one of said support portions is rotatable.
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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |