Venting apparatus

Claim 2

Venting apparatus comprising, in combination: a discharge conduit having an open end; enclosure means disposed about the open end of the discharge conduit and defining an enclosed space having an opening for discharging fluid; and shutter means positioned within said enclosed space for movement relative to the enclosure means between an open position and a closed position, the shutter means including a first portion for intercepting the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion defining an unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed, the second portion of the shutter means unblocking said opening upon movement to said open position to dischange said fluid.

Claim 3

Venting apparatus comprising, in combination: a discharge conduit having an exhaust outlet; a housing disposed about the exhaust outlet of the discharge conduit and defining an enclosed space having an opening for discharging fluid; and shutter means positioned within said enclosed space for movement relative to the housing between an open position and a closed position, the shutter means including a first portion controlled by the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion being spaced from said exhaust outlet and said opening for all positions of the shutter means, the first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed, said shutter means being responsive to an increase in pressure within the discharge conduit for unblocking said opening to discharge said fluid.

Claim 4

Venting apparatus comprising, in combination: a discharge conduit having an exhaust outlet; a housing disposed about the exhaust outlet of the discharge conduit and defining an enclosed space having an opening for discharging fluid; and shutter means positioned within said enclosed space for movement relative to the housing between an open position and a closed position, the shutter means including a first portion controlled by the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion being spaced from said exhaust outlet and said opening for all positions of the shutter means, the first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed, said shutter means being responsive to an increase in pressure within the discharge conduit for unblocking said opening to discharge said fluid.

Claim 5

Venting apparatus as defined in claim 2, in which the shutter means is of generally wedge-shaped configuration.

Claim 6

Venting apparatus as defined in claim 2, in which the opening in said housing is located in position to discharge fluid at an angle with respect to the axis of the discharge conduit.

Claim 7

Venting apparatus comprising, in combination: a discharge conduit having an exhaust outlet; a support member affixed to the discharge conduit adjacent its exhaust outlet; enclosure means disposed about the exhuast outlet of the discharge conduit and defining an enclosed space having an opening for discharging fluid; and shutter means carried by the support member for movement between an open position and a closed position, the shutter means including a first portion for intercepting the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion being spaced from said exhaust outlet and said opening for all positions of the shutter means, the first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed, the second portion of the shutter means unblocking said opening upon movement to said open position to discharge said fluid.

Claim 8

Venting apparatus comprising, in combination: a discharge conduit having an exhaust outlet; a support member affixed to the discharge conduit adjacent its exhaust outlet; enclosure means disposed about the exhuast outlet of the discharge conduit and defining an enclosed space having an opening for discharging fluid; and shutter means carried by the support member for movement between an open position and a closed position, the shutter means including a first portion for intercepting the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion being spaced from said exhaust outlet and said opening for all positions of the shutter means, the first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed, the second portion of the shutter means unblocking said opening upon movement to said open position to discharge said fluid.

Claim 9

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit connectible to the exhaust outlet and having an open end; a support member affixed to the discharge conduit adjacent its open end; enclosure means disposed about the open end of the discharge conduit, the enclosure means being rigidly mounted on the support member and defining an enclosed space having an opening for discharging fluid; and Shutter means carried by the support member for movement between an open position and a closed position, the shutter means including a first portion controlled by the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter means to said open position.

Claim 10

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit connectible to the exhaust outlet and having an open end; a support member affixed to the discharge conduit adjacent its open end; enclosure means disposed about the open end of the discharge conduit, the enclosure means being rigidly mounted on the support member and defining an enclosed space having an opening for discharging fluid; and Shutter means carried by the support member for movement between an open position and a closed position, the shutter means including a first portion controlled by the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter means to said open position.

Claim 11

Venting apparatus as defined in claim 6, in which the support member includes a pair of spaced tongues and an overhanging lip in juxtaposition with the tongues, the first portion of the shutter means being provided with a substantially straight edge disposed beneath the overhanging lip and a pair of spaced apertures for respectively receiving the tongues.

Claim 12

Venting apparatus as defined in claim 6, in which the first and second portions of the shutter means are disposed at an angle with respect to each other.

Claim 13

Venting apparatus as defined in claim 8, in which the first portion of the shutter means is of wedge-shaped configuration and includes two foreshortened side portions which define a pair of unobstructed passages for equalizing fluid pressure between the enclosure means and the conduit when the shutter means is closed.

Claim 14

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit connectible to the exhaust outlet and having an open end; a support member affixed to the discharge conduit adjacent its open end; a housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the support member and defining an enclosed space having an opening for discharging fluid; and shutter means pivotally carried by the support member for movement between an open position and a closed position, the shutter means including a first portion for intercepting the flow of fluid expelled from the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter means to said open position to exhaust fluid through said opening, the fluid being exhausted in a direction substantially transverse to the shutter''s direction of movement between said positions.

Claim 15

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit connectible to the exhaust outlet and having an open end; a support member affixed to the discharge conduit adjacent its open end; a housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the support member and defining an enclosed space having an opening for discharging fluid; and shutter means pivotally carried by the support member for movement between an open position and a closed position, the shutter means including a first portion for intercepting the flow of fluid expelled from the discharge conduit and a second portion for blocking said opening when the shutter means is in its closed position, said first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter means is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter means to said open position to exhaust fluid through said opening, the fluid being exhausted in a direction substantially transverse to the shutter''s direction of movement between said positions.

Claim 16

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit removably connectible to the exhaust outlet and having an open end; plate means affixed to the discharge conduit adjacent its open end; a housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the plate means and defining an enclosed space having an opening for discharging fluid at an angle with respect to the axis of the discharge conduit; and a three-dimensional shutter member carried by the plate means for movement between an open position and a closed position, the shutter member including a first portion for intercepting the flow of fluid from the blower and a second portion for blocking said opening when the shutter member is in its closed position, said first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter member is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter member to said open position.

Claim 17

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit removably connectible to the exhaust outlet and having an open end; plate means affixed to the discharge conduit adjacent its open end; a housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the plate means and defining an enclosed space having an opening for discharging fluid at an angle with respect to the axis of the discharge conduit; and a three-dimensional shutter member carried by the plate means for movement between an open position and a closed position, the shutter member including a first portion for intercepting the flow of fluid from the blower and a second portion for blocking said opening when the shutter member is in its closed position, said first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter member is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter member to said open position.

Claim 18

Venting apparatus as defined in claim 11, in which the shutter member is of generally wedge-shaped configuration.

Claim 19

Venting apparatus for attachmeNt to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit removably connectible to the exhaust outlet and having an open end; plate means affixed to the discharge conduit adjacent its open end, the plate means including a pair of spaced tongues protruding therefrom; a housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the plate means and defining an enclosed space having an opening for discharging fluid at an angle with respect to the axis of the discharge conduit; and a shutter member of generally wedge-shaped configuration pivotally carried by the plate means for movement between an open position and a closed position, the shutter member including a first portion controlled by the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter member is in its closed position, said first portion being spaced from said exhaust outlet and said opening for all positions of the shutter member, the first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter member is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter member to said open position.

Claim 20

Venting apparatus for attachmeNt to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit removably connectible to the exhaust outlet and having an open end; plate means affixed to the discharge conduit adjacent its open end, the plate means including a pair of spaced tongues protruding therefrom; a housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the plate means and defining an enclosed space having an opening for discharging fluid at an angle with respect to the axis of the discharge conduit; and a shutter member of generally wedge-shaped configuration pivotally carried by the plate means for movement between an open position and a closed position, the shutter member including a first portion controlled by the flow of fluid through the discharge conduit and a second portion for blocking said opening when the shutter member is in its closed position, said first portion being spaced from said exhaust outlet and said opening for all positions of the shutter member, the first portion defining at least one unobstructed passage for equalizing fluid pressure on opposite sides of the first portion when the shutter member is closed and being responsive to an increase in pressure within the discharge conduit for moving the shutter member to said open position.

Claim 21

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit removably connectible to the exhaust outlet and having an open end; plate means affixed to the discharge conduit adjacent its open end, the plate means including a pair of spaced tongues protruding therefrom; A housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the plate means and defining an enclosed space having an opening for discharging fluid at an angle with respect to the axis of the discharge conduit; and a shutter member of generally hollow wedge-shaped configuration pivotally carried by the plate means for movement between an open position and a closed position, the shutter member including a first portion controlled by the flow of fluid through the discharge conduit, a second portion for blocking said opening when the shutter member is in its closed position, and two foreshortened side portions which define a pair of unobstructed passages for equalizing fluid pressure on opposite sides of the first portion when the shutter member is closed, the shutter member being movable to said open position in response to an increase in pressure within the discharge conduit to exhaust fluid through said opening, the fluid being exhausted in a direction substantially transverse to the shutter''s direction of movement between said positions.

Claim 22

Venting apparatus for attachment to the exhaust outlet of a blower, the apparatus comprising, in combination: a discharge conduit removably connectible to the exhaust outlet and having an open end; plate means affixed to the discharge conduit adjacent its open end, the plate means including a pair of spaced tongues protruding therefrom; A housing disposed about the open end of the discharge conduit, the housing being rigidly mounted on the plate means and defining an enclosed space having an opening for discharging fluid at an angle with respect to the axis of the discharge conduit; and a shutter member of generally hollow wedge-shaped configuration pivotally carried by the plate means for movement between an open position and a closed position, the shutter member including a first portion controlled by the flow of fluid through the discharge conduit, a second portion for blocking said opening when the shutter member is in its closed position, and two foreshortened side portions which define a pair of unobstructed passages for equalizing fluid pressure on opposite sides of the first portion when the shutter member is closed, the shutter member being movable to said open position in response to an increase in pressure within the discharge conduit to exhaust fluid through said opening, the fluid being exhausted in a direction substantially transverse to the shutter''s direction of movement between said positions.