Greg L. Britt - Indian Trail NC Danny S. Meyer - Monroe NC Timothy D. Price - Monroe NC Robert V. Funderburk - Salisbury NC
Assignee:
Conbraco Industries, Inc. - Matthews NC
International Classification:
F16K 1503
US Classification:
137527, 137512, 251337, 251 87
Abstract:
A swing check valve for controlling fluid flow, including a valve housing having a port for fluid flow therethrough with a removable cover for accessing an interior of the valve housing. A valve assembly is positioned within the interior of the valve housing for controlling the fluid flow through the valve housing. The valve assembly includes a valve seat in fluid communication with the port and a clapper mounted in the valve housing on a pivotally-mounted rocker arm and moveable between an open position responsive to fluid flow in a flow direction and a closed position sealed against the valve seat responsive to fluid flow in an opposite, backflow direction. A spring is captured in the valve housing by the removable cover without attachment to either the cover or valve housing, and normally urges the clapper into the closed position sealed against the valve seat. A first pivot is carried by the spring and cooperates with a mating interior surface of the cover for permitting unattached pivotal movement of the spring relative to the cover. A second pivot is carried by the spring and cooperates with a mating pivot surface carried on the rocker arm for permitting unattached pivotal movement of the spring relative to the rocker arm whereby the spring is allowed to pivot within the valve housing responsive to movement of the clapper.
A poppet-type check valve for controlling fluid flow including a valve housing having an interior and first and second ports therein communicating with the interior of said valve housing for permitting fluid flow from an upstream side to a downstream side thereof and at least one valve assembly disposed within the interior of the valve housing for controlling the fluid flow therethrough. The valve assembly includes a valve seat positioned in the interior of the valve housing, and a seal retainer positioned in the interior of the valve housing downstream from the valve seat and mounted on a stem. The seal retainer and the stem are axially moveable away from the valve seat in response to fluid flow in a downstream direction, axially moveable toward the valve seat in response to fluid flow in an upstream direction, and in sealing engagement against the valve seat in the absence of fluid flow. A plurality of springs are pivotally mounted in the interior of the valve housing interconnecting the valve housing and stem for normally maintaining the seal retainer in sealing engagement with the valve seat in the absence of fluid flow. The springs are positioned in radial opposition to one another and extend outwardly from the stem in the downstream direction to cause the seal retainer to move away from the valve seat in response to fluid flow in the downstream direction, thereby increasing the force of the stem on the springs and causing the springs to pivot and compress to produce a diminishing resultant spring load on the stem.
Swing Check Backflow Preventor Having Check Valve With Lever Arm
A swing check valve for controlling fluid flow, including a valve housing having a port for fluid flow therethrough. A valve assembly is disposed within the valve housing for controlling the fluid flow therethrough, and includes a valve seat communicating with the port. A clapper is pivotally mounted in the valve housing and moves between open and closed positions. A lever arm is pivotally mounted on the rocker arm for providing leverage against the rocker arm for positioning the clapper and rocker arm within the valve housing. A spring is captured in the valve housing, and normally urges the clapper into the closed position. A first pivot is carried by the spring for permitting unattached pivotal movement of the spring relative to the cover. A second pivot is carried by the spring for permitting the spring to pivot within the valve housing responsive to movement of the clapper.
Radial Poppet-Type Check Valve With Closure Assist Feature
Timothy D. Price - Monroe NC, US Robert V. Funderburk - Salisbury NC, US Gareth P. Taylor - Indian Trail NC, US
Assignee:
Conbraco Industries, Inc. - Matthews NC
International Classification:
F16K 15/00
US Classification:
137512, 137529, 137536, 251337
Abstract:
A poppet-type check valve for controlling fluid flow, and including a valve housing having an interior and first and second ports therein communicating with the interior of the valve housing for permitting fluid flow from an upstream side to a downstream side thereof. At least one valve assembly is disposed within the interior of the valve housing for controlling the fluid flow therethrough. The valve assembly includes a valve seat positioned in the interior of the valve housing and a seal retainer positioned in the interior of the valve housing downstream from the valve seat and mounted on a stem. The seal retainer and the stem are axially moveable away from the valve seat in response to fluid flow in a downstream direction at a predetermined flow rate, and axially moveable towards and into sealing engagement with the valve seat in response to a downstream fluid flow at a flow rate less than the predetermined flow rate. A plurality of springs is allowed to compress past the position of neutral load for the purpose of elongating the stroke of the poppet. The elongated stroke results in enhanced flow performance.
Guarded Surgical Scalpel With Means For Mounting A Blade Thereon (And Subsequently Removing A Used Blade) And With Further Means For Cleaning And Sterilizing The Scalpel Following A Surgical Procedure
Robert V. Funderburk - Salisbury NC, US John F. Higdon - Matthews NC, US Julie C. Howell - Indian Trail NC, US Steven P. Lehmbeck - Baltimore MD, US
International Classification:
A61B 17/3213
US Classification:
606167
Abstract:
A guarded surgical scalpel is provided with manually-manipulatable means carried by the scalpel for, first, securely mounting a surgical blade on the scalpel and, second, subsequently de-mounting the surgical blade off the scalpel, the de-mounting being essentially in a “hands free” environment; that is, it is not necessary to touch the used blade for its removal. Additionally, the scalpel may be quickly disassembled for cleaning and/or sterilization following a surgical procedure in the operating room (“O.R.”) of a hospital, clinic or physician's office.
Swing-Type Check Valve Assembly Retained Within A Valve Housing By Abutting Engagement With A Valve Cover And A Port Of The Valve Housing
Robert Vernon Funderburk - Charlotte NC Timothy Duane Price - Monroe NC
Assignee:
Conbraco Industries, Inc. - Matthews NC
International Classification:
F16K 2500
US Classification:
1374546
Abstract:
A swing-check valve for controlling fluid flow includes a valve housing and a valve assembly that engages a removable cover of the valve housing for rigid positioning of the valve assembly within the interior of the valve housing when the cover is mounted to the housing. Moreover, the valve assembly includes a valve seat subassembly in addition to a clapper subassembly and a spring subassembly. The valve seat subassembly includes a valve seat that is frictionally disposed within a port of the valve housing for controlling fluid flow therethrough when the cover is fastened to the valve housing. The clapper subassembly includes a clapper pivotal between a first position in engagement with the valve seat for blocking fluid flow through the port and a second position for permitting fluid flow through the port. The spring subassembly includes a spring and a spring base engageable with the clapper subassembly for urging the clapper into the first position. In one embodiment, the clapper subassembly includes a pivot arm having a roller which engages the spring base and, in another embodiment, the clapper subassembly includes a cam arm on the clapper which engages the spring base.
Swing-Type Check Valve Assembly Having An Integrated Valve Seat And Valve Housing Cover
Robert Vernon Funderburk - Charlotte NC Timothy Duane Price - Monroe NC
Assignee:
Conbraco Industries, Inc. - Matthews NC
International Classification:
F16K 1500
US Classification:
137527
Abstract:
A swing-check valve for controlling fluid flow includes a valve housing and a valve assembly connected to a removable cover of the valve housing for rigid positioning of the valve assembly within the interior of the valve housing. Moreover, the valve assembly includes as a modular unit a valve seat subassembly in addition to a clapper subassembly and a spring subassembly. The valve seat subassembly includes a valve seat that is frictionally disposed within a port of the valve housing for controlling fluid flow therethrough when the cover is fastened to the valve housing. The clapper subassembly includes a clapper pivotal between a first position in engagement with the valve seat for blocking fluid flow through the port and a second position for permitting fluid flow through the port. The spring subassembly includes a spring and a spring base engageable with the clapper subassembly for urging the clapper into the first position. In one embodiment, the clapper subassembly includes a roller which engages the spring base and, in another embodiment, the clapper subassembly includes a cam member which engages the spring base.
Eckart F. Schultze - Charlotte NC Richard Easter - Charlotte NC Robert V. Funderburk - Charlotte NC
Assignee:
Yale Security Inc. - Monroe NC
International Classification:
E05F 1510
US Classification:
49 32
Abstract:
An hydraulic door closer has a motor/pump component to assist opening the door by supplying oil under pressure to the closer cylinder. The component is activated by a switch sensitive to the turning of the closer pinion shaft as the door is moved out of its frame. Further, the distance which the door must move until the switch activates the motor/pump component is adjustable. The hydraulic circuitry is conveniently embodied in a single manifold block.