US3913470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating system for traveling crane cabs, exhaust hoods and the like
Assignee: Crane Air Trac Inc
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Filing: 1974-08-09
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Granted: 1975-10-21
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Expires: 1994-08-09
Abstract
Abstract A ventilating, system for travelling fume hoods and cabs of travelling vehicles such as cranes wherein an air supply or exhaust unit is located outside the area in which the hood or vehicle operates. The air supply or exhaust unit blows air to or exhausts gases through a duct having an elongated slot therein. In the case of the travelling vehicle an air scoop, receiving air from the slot and delivering it to the crane cab, travels back and forth in the slot as the crane travels and a special sealing device keeps the slot sealed in front of and behind the air scoop. The procedure is reversed when gases are being exhausted from a travelling fume hood or other travelling exhaust system.
Inventors
- 👤 Patrick F Cullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:11
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/18; B; B08; B08B; B08B15/00; B08B15/002; B08B15/005; B66; B66C; B66C13/00; B66C13/52; F24; F24F; F24F13/00; F24F13/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86268
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
248 words
A ventilating system for a travelling gas-filled vehicle comprising a stationary elongated gas duct, a gas line connected in gas exchange relationship with said duct, an elongated slot located along the length of the gas duct, the slot having spaced apart opposed edges in the duct, a continuous sealing member in and along the full length of the slot and normally sealing the slot against flow of gases therethrough, said sealing member comprising two flexible flaps of elastomeric material, each flap having a sealing portion curled inwardly and substantially back on itself and with an open end, the open end being unattached and allowing a rolling action in the flap, one flap being attached to one edge and the other flap being attached to the other edge of the slot and the flaps being biased to bear against each other in sealing engagement and provide a seal for the slot, a gas delivery scoop, said scoop being attached to the travelling vehicle and having one end opening into the gas duct and the other end opening into the vehicle, the end of the scoop opening into the gas duct being slidably inserted in the elongateD slot between the flexible flaps and being of flattened oblong configuration on a cross section thereof with acutely radiused edges, said edges being located in the slot to provide opening and closing of the slot with minimum gas leakage therefrom and a gas moving device connected to the gas line and gas duct.
Claim 2
Dependent Claim
248 words
A ventilating system for a travelling gas-filled vehicle comprising a stationary elongated gas duct, a gas line connected in gas exchange relationship with said duct, an elongated slot located along the length of the gas duct, the slot having spaced apart opposed edges in the duct, a continuous sealing member in and along the full length of the slot and normally sealing the slot against flow of gases therethrough, said sealing member comprising two flexible flaps of elastomeric material, each flap having a sealing portion curled inwardly and substantially back on itself and with an open end, the open end being unattached and allowing a rolling action in the flap, one flap being attached to one edge and the other flap being attached to the other edge of the slot and the flaps being biased to bear against each other in sealing engagement and provide a seal for the slot, a gas delivery scoop, said scoop being attached to the travelling vehicle and having one end opening into the gas duct and the other end opening into the vehicle, the end of the scoop opening into the gas duct being slidably inserted in the elongateD slot between the flexible flaps and being of flattened oblong configuration on a cross section thereof with acutely radiused edges, said edges being located in the slot to provide opening and closing of the slot with minimum gas leakage therefrom and a gas moving device connected to the gas line and gas duct.
Claim 3
Dependent Claim
78 words
A system as claimed in claim 1 wherein each of the flaps has a number of sections therein joined together to make up the complete flap, the sections having joints between them comprising outer and inner overlapping ends joined together by connecting members, the outer overlapping end being arranged at an acute angle to the open end of the flap and having a bevelled edge to facilitate movement of the gas delivery scoop from one section to another.
Claim 4
Dependent Claim
31 words
A system as claimed in claim 2 wherein the overlapping ends have matching slotted portions therein and the connecting members are rivet members located through and slidable in the slotted portions.
Claim 5
Dependent Claim
60 words
A system as claimed in claim 2 which is an exhaust system for a travelling exhaust hood and wherein the gas line is an exhaust line, each flexible flap has its sealing portion located outside the elongated duct, the gas delivery scoop is an exhaust scoop and an exhausting device is connected to the exhaust line and the gas duct.
Claim 6
Dependent Claim
26 words
An exhaust system as claimed in claim 4 wherein the end of the exhaust scoop in the elongated slot has a cross section of airfoil configuration.
Claim 7
Dependent Claim
51 words
An exhaust system as claimed in claim 4 wherein an insulating sleeve is located around and spaced from the exhaust scoop and having open ends, thereby providing a cooled surface for the flexible flaps, said insulating sleeve having the flattened oblong configuration on a cross section thereof with acutely radiused edges.
Claim 8
Dependent Claim
59 words
A system as claimed in claim 2 which is a system for supplying clean air to the travelling vehicle and wherein the gas line is adapted to supply the clean air to the duct, each flexible flap has its sealing portion located inside the elongated duct and the gas delivery scoop delivers the clean air to the travelling vehicle.
Claim 9
Dependent Claim
37 words
A system as claimed in claim 7 wherein the overlapping ends of the joints in the flaps have matching slotted portions therein and the connecting members are rivet members located through and slidable in the slotted portions.
Claim 10
Dependent Claim
37 words
A system as claimed in claim 8 wherein a constant volume controller is located between the gas delivery scoop and the travelling vehicle with the scoop opening into the controller and the controller opening into the vehicle.
Claim 11
Dependent Claim
54 words
A system as claimed in claim 7 wherein the vehicle is a travelling crane, the crane has a motor located thereon and an exhaust fan is located on the crane having an inlet connected to and exhausting air from the cab and an outlet located to blow air on and through the crane motor.
Claim 12
Dependent Claim
26 words
A system as claimed in claim 7 wherein the end of the gas delivery scoop in the elongated slot has a cross section of airfoil configuration.
Claim 13
Dependent Claim
33 words
A system as claimed in claim 2 wherein the gas delivery scoop has plates of wear resistant material attached to each side thereof to provide wear resistant riding surfaces for the flexible flaps.
Claim 14
Dependent Claim
28 words
A system as claimed in claim 2 wherein the gas delivery scoop is pivotally mounted longitudinally to provide for relative sideways motion between the scoop and the duct.
Claim 15
Dependent Claim
80 words
A system as claimed in claim 2 wherein an entry and exit portion for the gas delivery scoop is provided on an end of the duct having two flexible sealing pads thereon normally closed to seal the end of the duct, said pads having a depth decreasing from the end of the duct and being arranged to allow the scoop to enter and leave the duct and connect into and disconnect from the sealing member while maintaining the duct sealed.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |