Patent US3416627A successfully refreshed from Google Patents.
US3683784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioner for vehicles
Assignee: Toyota Motor Corp
•
Filing: 1970-10-13
•
Granted: 1972-08-15
•
Expires: 1990-10-13
Abstract
Abstract An air conditioner for vehicles having a single vacuum diaphragm with which the driver can open and close a defroster outlet for blowing warm air on the windshield of the vehicle, a central outlet through which to blow suitably heated air or cold air into the middle space of the passenger compartment, or a heater outlet for blowing heated air into the lower space of the same compartment, because the vacuum diaphragm makes it possible to set the dampers for the three outlets simultaneously in three different positions and ensure unabated stability in positioning even when the diaphragm is in the neutral position.
Inventors
- 👤 Toshiji Matsui
- 👤 Yasuhiko Amano
- 👤 Yoshitsugu Hotta
- 👤 Tsutomu Mitabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:15
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00642; B60H1/00814; B60H1/00821; B60H1/00835; B60H1/00842; B60S; B60S1/00; B60S1/02; B60S1/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
424 words
A ventilating unit for a vehicle comprising: a casing provided with an inlet for introducing ventilating air into said casing and three outlet openings for supplying the air to three different portions of the vehicles; a first damper for opening and closing a first of said three outlet openings, said first damper being rigidly connected to one end of a first lever so that said first damper and lever are rotatable in unison about a first pivot, mounted on the casing, located adjacent said one end of the lever; a second damper for opening and closing second and third outlet openings, said second damper being rigidly connected to one end of a second lever so that said second damper and said second lever are rotatable in unison about a second pivot mounted on the casing; a connecting rod pivotally connected at one end thereof to the other end of said first lever through an elongated slot provided at said one end of the rod and a pin provided at said other end of the lever, and pivotally connected at the other end thereof to an end of said second lever; damper activating means operatively connected to said connecting rod for displacing the same; a first spring means for urging said first damper toward one direction about the first pivot and a second spring means for urging said second damper toward such direction about said second pivot as to apply to the connecting rod a force displacing the rod in the direction opposite to the direction of the displacement by the influence of said first spring; whereby the ventilating unit is stabilized in a neutral position in which the first and the third openings are closed and the second opening is open, and when the rod is moved by said activating means to a first position from said neutral position, the movement of the rod causes said second lever to turn about the pivot to the position opening both the second and third openings, but due to the elongated slot on the connecting rod the movement of this rod does not cause the first lever to turn about the first pivot, thus retaining the first opening in a closed position, and when the rod is moved to a second position opposite to the first position the movement of the rod causes both of the first and the seCond levers to turn about their respective pivots to the positions in which the first opening is opened and the second and the third openings are both closed.
Claim 2
Dependent Claim
424 words
A ventilating unit for a vehicle comprising: a casing provided with an inlet for introducing ventilating air into said casing and three outlet openings for supplying the air to three different portions of the vehicles; a first damper for opening and closing a first of said three outlet openings, said first damper being rigidly connected to one end of a first lever so that said first damper and lever are rotatable in unison about a first pivot, mounted on the casing, located adjacent said one end of the lever; a second damper for opening and closing second and third outlet openings, said second damper being rigidly connected to one end of a second lever so that said second damper and said second lever are rotatable in unison about a second pivot mounted on the casing; a connecting rod pivotally connected at one end thereof to the other end of said first lever through an elongated slot provided at said one end of the rod and a pin provided at said other end of the lever, and pivotally connected at the other end thereof to an end of said second lever; damper activating means operatively connected to said connecting rod for displacing the same; a first spring means for urging said first damper toward one direction about the first pivot and a second spring means for urging said second damper toward such direction about said second pivot as to apply to the connecting rod a force displacing the rod in the direction opposite to the direction of the displacement by the influence of said first spring; whereby the ventilating unit is stabilized in a neutral position in which the first and the third openings are closed and the second opening is open, and when the rod is moved by said activating means to a first position from said neutral position, the movement of the rod causes said second lever to turn about the pivot to the position opening both the second and third openings, but due to the elongated slot on the connecting rod the movement of this rod does not cause the first lever to turn about the first pivot, thus retaining the first opening in a closed position, and when the rod is moved to a second position opposite to the first position the movement of the rod causes both of the first and the seCond levers to turn about their respective pivots to the positions in which the first opening is opened and the second and the third openings are both closed.
Claim 3
Dependent Claim
145 words
A ventilating unit as defined in claim 1, which further comprises: a third lever having a lug mounted on one side thereof and adapted to engage the edge of said second lever, one end of said third lever being pivotally mounted on the second pivot and a stopper pin adapted to engage the other end of the third lever on the side opposite said lug so that when the rod is moved to said first position the third lever remains in rest position, but when the rod is moved to said second position the lug engages the second lever and the third lever is pivoted together with the second lever; and third spring means connected to other end of the third lever for stabilizing the same in a neutral position in cooperation with said second spring means when the rod is in said neutral position.
Claim 4
Dependent Claim
37 words
A ventilating unit as defined in claim 1 in which said second spring means for elastically urging the second damper is fixed at one end to said second lever and at the opposite end to said casing.
Claim 5
Dependent Claim
38 words
A ventilating unit as defined in claim 1 in which said second spring means for elastically urging the second damper is fixed at one end on said second lever and at the opposite end on said third lever.
References Cited (Backward Citations)
US2295146A
Cited
US2430759A
Cited
US2837288A
Cited
US2963954A
Cited
US3170509A
Cited
US3451469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |