Patent US3760329A successfully refreshed from Google Patents.
Patent US4102278A successfully refreshed from Google Patents.
US4102278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace hogged fuel disperser using modulated airflow
Assignee: Wyatt Engineers Inc
•
Filing: 1977-05-11
•
Granted: 1978-07-25
•
Expires: 1997-05-11
Abstract
Abstract Combustion air under pressure directed horizontally in a fan shaped jet against hogged fuel dropping in a free fall trajectory from a feed chute toward the furnace grate spreads the fuel across the length and width of the grate more effectively than in prior art air jet dispersers. Increased combustion efficiency and heating capacity are achieved from use of tandem oscillating flow restrictor gates in the jet nozzle duct, one such gate being oscillated at twice the frequency of the other and with additive effects on resultant variations in jet air discharge velocity.
Inventors
- 👤 Gerald P. McManama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:34
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/02; F23K3/16; F23K3/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
Apparatus for dispersing hogged fuel pneumatically with improved combustion distribution over the area of a furnace fire grate comprising, in combination with means for discharging hogged fuel particles downwardly toward the grate in a free fall trajectory, air duct means adapted to receive pressurized air at one end and having a discharge orifice at its opposite end directed in intersecting relationship with said trajectory to blow the fuel particles therefrom out over the area of the grate, tandemly positioned oscillatable airflow restrictor gates each operably mounted in said duct means to vary the air velocity flowing through said orifice, and drive means operable to oscillate one such gate at a multiple of the frequency of the other.
Claim 2
Dependent Claim
117 words
Apparatus for dispersing hogged fuel pneumatically with improved combustion distribution over the area of a furnace fire grate comprising, in combination with means for discharging hogged fuel particles downwardly toward the grate in a free fall trajectory, air duct means adapted to receive pressurized air at one end and having a discharge orifice at its opposite end directed in intersecting relationship with said trajectory to blow the fuel particles therefrom out over the area of the grate, tandemly positioned oscillatable airflow restrictor gates each operably mounted in said duct means to vary the air velocity flowing through said orifice, and drive means operable to oscillate one such gate at a multiple of the frequency of the other.
Claim 3
Dependent Claim
34 words
The combination defined in claim 1, wherein the duct means is tapered toward the discharge orifice and wherein the gate nearest the discharge orifice is oscillated at twice the frequency of the other gate.
Claim 4
Dependent Claim
43 words
The combination defined in claim 2, wherein the gates are oscillated with such relative phasing that the gate nearest the discharge orifice reaches alternate ones of its most flow-restricting position in substantial time coincidence with the other gate reaching its most flow-restricting position.
Claim 5
Dependent Claim
29 words
The combination defined in claim 3, and means operable to vary the average flow-restricting positions of the oscillating gates independently of the respective ranges of oscillation of such gates.
Claim 6
Dependent Claim
44 words
The combination defined in claim 4, wherein the gates are pivotally mounted, spring means yieldably urging the gates toward their least flow-restricting positions, and rotative eccentric cam means operable to move the respective gates cyclically to their most flow-restricting positions against said spring means.
Claim 7
Dependent Claim
47 words
The combination defined in claim 5, wherein the discharge duct means has an upper wall sloping downward toward the discharge orifice and wherein the gates comprise flat plate members disposed generally horizontally in a common plane and cooperatively forming a lower wall beneath said sloping upper wall.
Claim 8
Dependent Claim
38 words
The combination defined in claim 6, wherein the gate furthest from the orifice has a downturned flange that bridges the variable gap between said gate and the other gate in the varying positions of oscillation of the gates.
Claim 9
Dependent Claim
29 words
The combination defined in claim 1, and means operable to vary the average flow-restricting positions of the oscillating gates independently of the respective ranges of oscillation of such gates.
Claim 10
Dependent Claim
22 words
The combination defined in claim 8 wherein the drive means operate to oscillate each of said gates in a simple harmonic motion.
Claim 11
Dependent Claim
22 words
The combination defined in claim 3 wherein the drive means operate to oscillate each of said gates in a simple harmonic motion.
References Cited (Backward Citations)
US477387A
Cited
US586265A
Cited
US1311524A
Cited
US1455576A
Cited
US1959864A
Cited
US2178360A
Cited
US2602706A
Cited
US3137529A
Cited
US3610182A
Cited
US3669502A
Cited
US3812794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |