# US 5,343,798 A · Apparatus for gripping and sealing a fluid conduit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,343,798 A - Document ID: US5343798A - Status: Granted - Kind: A - Application number: 07/945,813 - Filed: 1992-09-15 - Granted: 1994-09-06 - Earliest claimed: 1992-09-15 - Assignees: FasTest, Inc. - Inventors: Stanlee W. Meisinger; Mark D. Medved - Web page: https://patentgrep.com/patent/US5343798A ## CPC - F16L 37/0842: {by means of a ring which is split into a plurality of component parts which are held in place by means of a resilient ring member} - Y10S 277/91: O-ring seal - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A connection apparatus for connection with an inside of a fluid conduit including seal member, sleeve member and collet assembly to seal and grip the fluid conduit which is in fluid communication with a fluid passageway. The connection apparatus further includes a resilient member and a control valve to cause actuating and deactuating relative movement between the collet assembly and the sleeve member so as to grip and seal the inside of the fluid conduit. ## Claims ### Claim 1 A connection apparatus for connection with an inside of a fluid conduit, comprising: a housing defining a chamber, the housing having first and second ends; piston means, having first and second ends, slidably mounted in the chamber; stem means, having first and second ends, attached to the piston and having a first end portion projecting from the first end of the housing, the stem means defining a fluid passageway; seal and collet means mounted on the first end portion of the stem means for sealing and gripping the inside of the fluid conduit so as to interconnect the fluid conduit to the fluid passageway of the stem means, the seal and collet means including a seal member, a sleeve member, and a collet assembly; and pneumatic means in the housing for causing actuating and deactuating relative movement between the stem means and the housing, the actuating relative movement causing an outer surface of the sleeve member to slide under an inner surface of the collet assembly, thereby forcing the collet assembly against the inside of the fluid conduit, and causing the seal member to be squeezed axially along the fluid passageway, thereby forcing the seal member to radially expand to seal the inside of the fluid conduit. ### Claim 2 (depends on 1) A connection apparatus in accordance with claim 1, wherein the pneumatic means includes resilient means disposed in the chamber for applying a biasing force to the piston generally along an axis of the chamber. ### Claim 3 (depends on 2) A connection apparatus in accordance with claim 2, wherein the pneumatic means further includes control valve means for controlling flow of pressurized fluid into and out of the chamber, the resilient means being allowed to expand when the pressurized air is released from the chamber through the control valve means, the resilient means being compressed when the pressurized air is forced into the chamber through the control valve means, the resilient means cooperating with the piston means to cause actuating and deactuating relative movement of the first end portion of the stem means and the housing. ### Claim 4 (depends on 3) A connection apparatus in accordance with claim 3, wherein the control valve means includes a coupling valve mounted in a port defined in the housing, the coupling valve being manually actuated for releasing pressurized air out of the chamber of the housing. ### Claim 5 (depends on 2) A connection apparatus in accordance with claim 2, wherein the resilient means is a resilient spring member. ### Claim 6 (depends on 1) A connection apparatus in accordance with claim 1, further including retention means disposed on the stem means for limiting reciprocal movement of the sleeve member and seal member on the stem means. ### Claim 7 (depends on 1) A connection apparatus in accordance with claim 1, wherein the seal member is disposed on the stem means intermediate of the sleeve member and the first end of the stem means. ### Claim 8 (depends on 1) A connection apparatus in accordance with claim 1, wherein the collet means is mounted on the stem means intermediate of the sleeve member and the first end of the housing. ### Claim 9 (depends on 1) A connection apparatus in accordance with claim 1, wherein the collet assembly includes a plurality of segments retained together by at least one resilient O-ring to form a ring-shape configuration. ### Claim 10 (depends on 1) A connection apparatus in accordance with claim 1, wherein the second end of the piston means includes means for connecting the piston means to a fluid conveying apparatus having a fluid passageway such that the fluid passageway of the stem means and the fluid passageway of the fluid conveying apparatus are in fluid communication. ### Claim 11 (depends on 1) A connection apparatus in accordance with claim 1, wherein the outer surface of the sleeve member and the inner surface of the collet assembly are extended obliquely relative to a longitudinal axis of the stem means. ### Claim 12 (depends on 1) A connection apparatus in accordance with claim 1, wherein the oblique surfaces of the outer surface of the sleeve member and the inner surface of the collet assembly have different angles of divergence. ### Claim 13 (depends on 12) A connection apparatus in accordance with claim 12, wherein the collet assembly has a second inner surface extending at an angle different than that of the first inner surface. ### Claim 14 (depends on 12) A connection apparatus in accordance with claim 12, wherein the collet assembly cooperates with the sleeve member to pivot about a location on the sleeve member into further engagement with the inside of the fluid conduit as the stem means is moved toward the housing. ### Claim 15 (depends on 1) A connection apparatus in accordance with claim 1, wherein the sleeve member has a second oblique surface facing the first end of the stem means receiving the seal member, the seal member being squeezed upon the actuating relative movement of the stem means toward the housing. ### Claim 16 (depends on 1) A connection apparatus in accordance with claim 1, wherein the collet assembly is pivoted toward the inside of the fluid conduit to grip the inside of the fluid conduit. ### Claim 17 A connector apparatus used with the inside of a fluid conduit, comprising: a housing defining a chamber, the housing having first and second ends; piston means, having first and second ends, slidably mounted in the chamber of the housing for reciprocal movement within the chamber, the piston means defining a fluid passageway therethrough; a stem, having first and second ends, attached to the piston means, a first end portion of the stem projecting from the first end of the housing, the stem defining a fluid passageway therethrough in fluid communication with the fluid passageway of the piston means so as to define a fluid passageway through the housing; collet means mounted on the end portion of the stem projecting from the first end of the housing for engaging the inside of the fluid conduit, the collet means including a collet assembly and a sleeve mounted on the stem for reciprocal movement on the stem; retention means disposed on the stem means for limiting reciprocal movement of the sleeve on the stem; seal means disposed on the stem intermediate of the sleeve and the first end of the stem means for sealably engaging the inside of the fluid conduit; and pneumatic means controlling flow of pressurized fluid into and out of the chamber for causing actuating and deactuating movement of the stem relative to the housing, the pneumatic means further includes spring means disposed in the chamber of the housing for biasing the piston means along the axis of the housing, the actuating movement causing an exterior surface of the sleeve to slide under an interior surface of the collet assembly, thereby forcing the collet assembly against the inside of the fluid conduit, the actuating movement further causing the sleeve to compress the seal means into sealing engagement with the inside of the fluid conduit. ### Claim 18 (depends on 17) An apparatus in accordance with claim 17, wherein the stem is interchangeably attached to the piston means. ### Claim 19 (depends on 18) An apparatus in accordance with claim 18, wherein the collet assembly includes a plurality of equal segments held together by a plurality of O-rings. ### Claim 20 (depends on 18) An apparatus in accordance with claim 18, wherein the exterior surface of the sleeve has an angle different than that of the interior surface of the collet assembly. ### Claim 21 (depends on 17) An apparatus in accordance with claim 17, wherein the housing further includes vent means for venting fluid from an area of the housing chamber wherein the spring means is located. ### Claim 22 (depends on 17) An apparatus in accordance with claim 17, wherein the housing is of one piece extruded aluminum. ### Claim 23 (depends on 17) An apparatus in accordance with claim 17, wherein the second end of the piston means includes adaptor means for interconnection of a fluid conduit. ### Claim 24 (depends on 17) An apparatus in accordance with claim 17, wherein the stem and the piston means define tool receiving means for rotating the stem relative to the piston means. ### Claim 25 A collet assembly for use on a stem of a connector apparatus to grip the inside of a fluid conduit, the connector including actuator apparatus for actuating the collet assembly, the collet assembly comprising: a plurality of symmetrical collet segments resiliently retained together by at least one resilient member, the collet segments defining an interior surface have a first angle; a sleeve having an exterior surface with a second angle, the first and second angles being different, upon actuation of the seal and collet assembly, the exterior surface of the sleeve sliding under the interior surface of the collet segments so as to force an exterior surface of the collet segments into engagement with the inside of the fluid conduit. ### Claim 26 (depends on 25) An assembly in accordance with claim 25, further including seal means for providing a fluid tight seal with the inside of the fluid conduit upon actuation. ### Claim 27 (depends on 25) An assembly in accordance with claim 25, wherein the exterior surface of collet segments engaging the inside of the fluid conduit is roughened. ### Claim 28 (depends on 25) An assembly in accordance with claim 25, wherein a plurality of O-rings retain the collet segments together, the O-rings being disposed in grooves defined in the collet segments. ### Claim 29 A connection apparatus for connection with an inside of a fluid conduit, comprising: a housing defining a chamber, the housing having first and second ends; piston means, having first and second ends, slidably mounted in the chamber; stem means, having first and second ends, attached to the piston and having a first end portion projecting from the first end of the housing, the stem means defining a fluid passageway; seal and collet means mounted on the first end portion of the stem means for sealing and gripping the inside of the fluid conduit so as to interconnect the fluid conduit to the fluid passageway of the stem means, the seal and collet means including a seal member, a sleeve member, and a collet assembly; and pneumatic means in the housing for causing actuating and deactuating relative movement between the stem means and the housing, the actuating relative movement causing an outer surface of the sleeve member to slide under an inner surface of the collet assembly, the collet assembly being pivoted toward the inside of the fluid conduit, thereby forcing the collet assembly to grip the inside of the fluid conduit. ### Claim 30 (depends on 29) A connection apparatus in accordance with claim 29, oblique surfaces of the outer surface of the sleeve member and the inner surface of the collet assembly have different angles of divergence. ### Claim 31 A connection apparatus for connection with an inside of a fluid conduit, comprising: a housing defining a chamber, the housing having first and second ends; piston means, having first and second ends, slidably mounted in the chamber; stem means, having first and second ends, attached to the piston and having a first end portion projecting from the first end of the housing, the stem means defining a fluid passageway; seal and collet means mounted on the first end portion of the stem means for sealing and gripping the inside of the fluid conduit so as to interconnect the fluid conduit to the fluid passageway of the stem means, the seal and collet means including a seal member, a sleeve member, and a collet assembly; pneumatic means in the housing for causing actuating and deactuating relative movement between the stem means and the housing, the actuating relative movement causing an outer surface of the sleeve member to slide under an inner surface of the collet assembly, thereby forcing the collet assembly against the inside of the fluid conduit; and wherein the oblique surfaces of the outer surface of the sleeve member and the inner surface of the collet assembly have different angles of divergence. ### Claim 32 (depends on 31) A connection apparatus in accordance with claim 31, wherein the collet assembly has a second inner surface extending at an angle different than that of the first inner surface. ### Claim 33 (depends on 31) A connection apparatus in accordance with claim 31, wherein the collet assembly cooperates with the sleeve member to pivot about a location on the sleeve member into further engagement with the inside of the tube as the stem means is moved toward the housing. ### Claim 34 A connection apparatus for connection with an inside of a fluid conduit, comprising: a housing defining a chamber, the housing having first and second ends; piston means, having first and second ends, slidably mounted in the chamber; stem means, having first and second ends, attached to the piston and having a first end portion projecting from the first end of the housing, the stem means defining a fluid passageway; seal and collet means mounted on the first end portion of the stem means for sealing and gripping the inside of the fluid conduit so as to interconnect the fluid conduit to the fluid passageway of the stem means, the seal and collet means including a seal member, a sleeve member, and a collet assembly; pneumatic means in the housing for causing actuating and deactuating relative movement between the stem means and the housing, the actuating relative movement causing an outer surface of the sleeve member to slide under an inner surface of the collet assembly, thereby forcing the collet assembly against the inside of the fluid conduit; and wherein the sleeve member has a second oblique surface facing the end of the stem means receiving the seal member, the seal member being squeezed upon the actuating relative movement of the stem means toward the housing. ### Claim 35 A connection apparatus for connection with an inside of a fluid conduit, comprising: a housing defining a chamber, the housing having first and second ends; piston means, having first and second ends, slidably mounted in the chamber; stem means, having first and second ends, attached to the piston and having a first end portion projecting from the first end of the housing, the stem means defining a fluid passageway; seal and collet means mounted on the first end portion of the stem means for sealing and gripping the inside of the fluid conduit so as to interconnect the fluid conduit to the fluid passageway of the stem means, the seal and collet means including a seal member, a sleeve member, and a collet assembly; pneumatic means in the housing for causing actuating and deactuating relative movement between the stem means and the housing, the actuating relative movement causing an outer surface of the sleeve member to slide under an inner surface of the collet assembly, thereby forcing the collet assembly against the inside of the fluid conduit; wherein the pneumatic means further includes control valve means for controlling flow of pressurized fluid into and out of the chamber, resilient means being allowed to expand when the pressurized air is released from the chamber through the control valve means, the resilient means being compressed when the pressurized air is forced into the chamber through the control valve means, the resilient means cooperating with the piston means to cause actuating and deactuating relative movement of the first end portion of the stem means and the housing; and wherein the control valve means includes a coupling valve mounted in a port defined in the housing, the coupling valve being manually actuated for releasing pressurized air out of the chamber of the housing.