US3742684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter mounting assembly
Assignee: Caterpillar Inc
•
Filing: 1971-08-25
•
Granted: 1973-07-03
•
Expires: 1991-08-25
Abstract
Abstract A combined heating and air-conditioning system is provided with a heater coil and evaporator coil located back to back in a single housing enabling the use of common controls and common duct system for both heating and cooling. The heater coil is placed ahead of the evaporator coil in the air flow so that air may be heated and dehumidified on cool, humid days and warm air from the heater may be used to prevent the evaporator coil from frosting over.
Inventors
- 👤 J Wait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:35
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00378; B60H1/00007; B60H1/00207; B60H2001/00235
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
An air filter mounting assembly for a vehicle airconditioning system wherein air flow is through opening means in the roof of said vehicle, said filter mounting comprising: a. a support bracket fitted about said opening means in the roof of said vehicle; b. said bracket comprising an attachment flange attached to said roof and a spacer flange connected to and spaced from said attachment flange for supporting a filter element spaced from said opening means; c. a filter holder means holding a filter element engaging the periphery of said support bracket and holding said filter element in engagement with said spacer flange; d. a dust pan secured to said holder means and extending below and around the periphery of said filter element and said holder means; e. attaching means releasably attaching said dust pan and said filter holder means to said support bracket; f. said attaching means comprises a plurality of spring clips including means carried by said dust pan; g. each of said clips operatively engaging aligned detent means in said support bracket and holder means.
Claim 2
Dependent Claim
177 words
An air filter mounting assembly for a vehicle airconditioning system wherein air flow is through opening means in the roof of said vehicle, said filter mounting comprising: a. a support bracket fitted about said opening means in the roof of said vehicle; b. said bracket comprising an attachment flange attached to said roof and a spacer flange connected to and spaced from said attachment flange for supporting a filter element spaced from said opening means; c. a filter holder means holding a filter element engaging the periphery of said support bracket and holding said filter element in engagement with said spacer flange; d. a dust pan secured to said holder means and extending below and around the periphery of said filter element and said holder means; e. attaching means releasably attaching said dust pan and said filter holder means to said support bracket; f. said attaching means comprises a plurality of spring clips including means carried by said dust pan; g. each of said clips operatively engaging aligned detent means in said support bracket and holder means.
Claim 3
Dependent Claim
35 words
The air filter assembly of claim 1 wherein said roof and said opening means lie in a horizontal plane; and, said filter element and said dust pan lie in parallel horizontal planes below said roof.
Claim 4
Dependent Claim
68 words
The air filter assembly of claim 2 wherein the portions of said dust pan extending around the periphery of said filter and said holder means comprises upward side walls terminating above said filter element in spaced relation to said roof to permit air flow toward said filter element; and, the air flow through said filter element is from the direction of said dust pan toward said opening means.
References Cited (Backward Citations)
US3392512A
Cited
US3555846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |