Auto-drainage assembly
First Claim
1. An auto-drainage assembly of the sort essentially including a drain reservoir case, a hollow discharge guide shaft fitted in an opening the bottom of said drain reservoir case, a drain valve seat formed in said discharge guide shaft for discharging a drain liquid therethrough, a piston slidably received in a pilot chamber in communication with said drain reservoir case through a pilot valve seat to be opened and closed in relation with upward and downward movements of a float within said drain reservoir case, and a drain valve body provided on the piston for opening and closing the drain valve seat, characterized in that said auto-drainage assembly comprises:
- an annular seal member fitted on the outer periphery of said piston to serve as said drain valve body; and
a large number of drain discharge grooves formed on the inner periphery of said discharge guide shaft alternately with guide surfaces to be brought into sliding contact with said drain valve body when unseated from said drain valve seat, said guide surfaces being arranged in a diameter which is one of substantially the same as and slightly larger than said drain valve seat.
1 Assignment
0 Petitions
Accused Products
Abstract
An auto-drainage assembly to be inserted into a pneumatic piping system which supplies pressurized air to a pneumatically operating machine, for separating a drain liquid from the piping. The auto-drainage assembly is the type which includes a drain reservoir case, a hollow discharge guide shaft fitted in position at the bottom of the reservoir case, a drain valve seat provided within the discharge guide shaft for discharging the drain liquid to the outside, a hollow piston driven by pressurized air supplied to a pilot chamber in relation with upward and downward movements of a float within the drain reservoir case, and a drain valve body provided on the piston. The drain valve body is constituted by an annular seal member which is fitted on the outer periphery of the piston, and a large number of drain discharge grooves are provided on the inner periphery of the discharge guide shaft in such a way as to define a corresponding number of guide surfaces between the respective drain discharge grooves. As the drain valve body is moved up and down for opening and closing the drain valve seat, the seal member is guided along the guide surfaces between the drain discharge grooves to prevent dislocation of the seal member under the influence of gushing streams of the drain liquid being discharged.
9 Citations
8 Claims
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1. An auto-drainage assembly of the sort essentially including a drain reservoir case, a hollow discharge guide shaft fitted in an opening the bottom of said drain reservoir case, a drain valve seat formed in said discharge guide shaft for discharging a drain liquid therethrough, a piston slidably received in a pilot chamber in communication with said drain reservoir case through a pilot valve seat to be opened and closed in relation with upward and downward movements of a float within said drain reservoir case, and a drain valve body provided on the piston for opening and closing the drain valve seat, characterized in that said auto-drainage assembly comprises:
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an annular seal member fitted on the outer periphery of said piston to serve as said drain valve body; and a large number of drain discharge grooves formed on the inner periphery of said discharge guide shaft alternately with guide surfaces to be brought into sliding contact with said drain valve body when unseated from said drain valve seat, said guide surfaces being arranged in a diameter which is one of substantially the same as and slightly larger than said drain valve seat. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An auto-drainage assembly of the sort essentially including a drain reservoir case, a hollow discharge guide shaft fitted in an opening the bottom of said drain reservoir case, a drain valve seat formed in said discharge guide shaft for discharging a drain liquid therethrough, a piston slidably received in a pilot chamber in communication with said drain reservoir case through a pilot valve seat to be opened and closed in relation with upward and downward movements of a float within said drain reservoir case, and a drain valve body provided on the piston for opening and closing the drain valve seat, characterized in that said auto-drainage assembly comprises:
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an annular seal member fitted in the inner periphery of said discharge guide shaft to serve as said drain valve seat; and a large number of drain discharge grooves formed on the circumferential surface of said drain valve body alternately with guide surfaces to be brought into sliding contact with said seal member when said drain valve body is unseated from said drain valve seat, said guide surfaces being arranged in a diameter which is one of substantially the same as and slightly smaller than said drain valve seat. - View Dependent Claims (8)
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Specification