# US 2021/0277956 A1 · Bearing extraction from a stuffing box of a rotary mechanical device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277956 A1 - Document ID: US20210277956A1 - Status: Published application - Kind: A1 - Application number: 16/809,461 - Filed: 2020-03-04 - Published: 2021-09-09 - Earliest claimed: 2020-03-04 - Assignees: Seal-Ryt Corp. - Applicants: Seal-Ryt Corp. - Inventors: Thomas B. Monahan; Michael F. Huard - Web page: https://patentgrep.com/patent/US20210277956A1 ## CPC - F16J 15/189: {Means for facilitating the removal of the packing} - B66F 3/08: screw operated (B66F3/44 takes precedence; gearings F16H) - F16C 33/06: Sliding surface mainly made of metal (F16C33/24 - F16C33/28 take precedence; {casting metal bearing surfaces B22D15/02, B22D19/08}) - F16C 33/201: {Composition of the plastic} - F16C 33/28: with embedded reinforcements shaped as frames or meshed materials - F16C 33/74: of sliding-contact bearings - F16C 43/02: Assembling sliding-contact bearings - F16J 15/183: {using a lantern ring} - F16B 37/125: {the external surface of the insert being threaded} - F16C 2360/44: Centrifugal pumps - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) ## Abstract An improved bearing or bushing body extraction from a stuffing box using jack screws is provided. The bearing or bushing seal body includes at least one jack screw on each half of a split body. The jack screw passes axially through the sidewall of the body to the inner flange of the stuffing box and turning the jack screw against the inner flange to lift the body from the stuffing box. A single inner threaded or double threaded insert with a reverse outer thread and standard inner thread is inserted into the bottom wall of the body so that the body may be installed flush against the inner flange. By turning the jack screw through the insert and against the flange, the seal body is pushed out rather than pulled. ## Claims ### Claim 1 An improved bearing or bushing body seal body extraction method for removing a seal body from a stuffing box having an inner flange at the bottom end, comprising: providing a seal body with at least one axial jack screw hole through a sidewall of the body for receiving a jack screw with a stepped opening at the bottom end for receiving a cylindrical doubled-sided threaded insert metal cylindrical insert, and threading a jack screw through the hole and against the inner flange of the stuffing box to lift the seal body from the stuffing box. ### Claim 2 (depends on 1) The method of claim 1, comprising: inserting a double threaded insert into the bottom wall of the body so that the body may be installed flush against the inner flange; and threading the jack screw through the insert. ### Claim 3 An improved bearing or bushing seal body, comprising: a substantially rigid seal body with at least one axial jack screw hole through a sidewall of the body for receiving a jack screw. ### Claim 4 (depends on 3) The seal body of claim 3, further comprising: a double threaded insert in the bottom wall of the body, with a reverse external thread and standard internal thread. ### Claim 5 (depends on 3) The seal body of claim 3, wherein the substantially rigid cylindrical body is split axially into two halves to facilitate installation over the shaft. ### Claim 6 (depends on 5) The seal body of claim 5, wherein the split substantially rigid cylindrical body is split axially through two equally spaced jack screw holes. ### Claim 7 (depends on 6) The seal body of claim 6, wherein each of the two halves have three jack screw holes. ### Claim 8 (depends on 3) The seal body of claim 3, wherein the substantially rigid cylindrical body is formed of a non-ferrous metal material. ### Claim 9 (depends on 3) The seal body of claim 3, wherein the substantially rigid cylindrical body is formed from a thermoplastic material. ### Claim 10 (depends on 3) The seal body of claim 3, wherein the thermoplastic material is filled with at least one of carbon, glass and mixtures thereof. ### Claim 11 (depends on 3) The seal body of claim 3, wherein a groove is formed on the outer groove of at least one of the end caps for receiving an O-ring. ### Claim 12 (depends on 3) The seal body of claim 3, wherein the insert has a screw slot at the bottom end for insertion into the bottom of the body. ### Claim 13 (depends on 6) The seal body of claim 6, wherein each of the split halves has at least two jack screw holes. ### Claim 14 (depends on 3) The seal body of claim 3, wherein the body includes an integrally formed lantern ring.