US3651740A - Pneumatic driving tool with a fail-safe mechanism - Google Patents
Pneumatic driving tool with a fail-safe mechanism Download PDFInfo
- Publication number
- US3651740A US3651740A US879316A US3651740DA US3651740A US 3651740 A US3651740 A US 3651740A US 879316 A US879316 A US 879316A US 3651740D A US3651740D A US 3651740DA US 3651740 A US3651740 A US 3651740A
- Authority
- US
- United States
- Prior art keywords
- piston
- cylinder
- head
- flange
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
- B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
Definitions
- ABSTRACT [2l] APPL N01 879,316 A pneumatic driving tool is provided which incorporates a fail-safe mechanism for preventing damage to the tool when [52] U s Cl 91/417 A 91/402 92/85 an abnormal operating condition occurs.
- the means for imparting such a driving blow is generally effected through a single or double spool type piston having a driver blade or the like affixed to the leading or fastener-contacting end thereof.
- the piston is reciprocally mounted within a suitable cylinder.
- the leading end of the piston strikes a resilient bumper which is positioned at the lower terminus of the cylinder.
- the bumper which is normally formed of rubber or a rubberlike material, is adapted to absorb the excess impacting force of the piston and cushion same.
- the return of the piston to its firing position may be accomplished by springs, trapped air, or the like.
- lt is a further object of this invention to provide a pneumatic tool wherein early detection of bumper deterioration can be readily effected without disassembly of the tool and thus prevent the occurrence of serious damage to the tool.
- a pneumatically operated device which comprises an elongated cylinder, and a double spool type piston disposed therein.
- the piston in normal operation reciprocates within the cylinder between longitudinally spaced first and second positions.
- an abnormal operational situation however, the piston is rendered immovable and is disposed at a third position.
- Such an abnormal situation is frequently due to the wear or breakdown of the resilient bumper which under normal conditions engages the moving piston and absorbs or dampens its kinetic energy when the piston reaches its second position and prior to the piston returning to its rst position.
- the third position is disposed adjacent to the second position but at a greater distance from the rst position.
- the double spool type piston is provided with a transversely extending, air pressure responsive head which is in sliding, sealing engagement with the interior surface of the cylinder.
- the piston includes a transversely extending air pressure responsive, annular flange which is longitudinally spaced from the head.
- the annular flange is adapted to be in sealing engagement with the cylinder interior surface only when the piston is reciprocating between the first and second positions. When LII the piston moves beyond the second position and reaches the third position, the annular flange is no longer in sealing engagement with the cylinder interior surface whereupon the piston is restrained by air pressure from returning to the first position.
- FIG. l is a side elevational view of a pneumatically operated driving tool embodying the fail-safe mechanism.
- FIG. 2 is an enlarged, fragmentary vertical sectional view of the tool of FIG. l and showing the piston in its firing position with respect to the cylinder.
- FIGS. 3, 4, and S are fragmentary vertical sectional views of the fail-safe mechanism shown in FIG. 2, but with the piston thereof located respectively at the first, second, and third posi tions with respect to the cylinder.
- FIGS. 6, 7, and 8 are similar to FIGS. 3-5, but showing a second embodiment of the fail-safe mechanism.
- FIGS. 9, l0, and 11 are similar to FIGS. 3-5, but showing a third embodiment of the fail-safe mechanism assembly.
- FIGS. ll2, 13, and 14 are similar to FIGS. 3-5, but showing a fourth embodiment of the fail-safe mechanismi
- FIGS. l2, 13, and 14 are similar to FIGS. 3-5, but showing a fourth embodiment of the fail-safe mechanismi
- a pneumatically operated portable fastenerdriving tool 20 is shown which incorporates one embodiment of the fail-safe mechanism 21.
- tool 20 comprises a hollow handle section 22, a housing 23 disposed at the forward end of the handle section and in which the fail-safe mechanism 2l is disposed, a magazine 24 for fasteners secured to the lower portion of the handle section, and a nose section 25 positioned beneath the housing and from which individual fasteners are rapidly expelled.
- An air hose connector 27 is provided at the rear of the handle section 22 and a trigger control 28 is mounted adjacent the housing 23 for manually controlling the firing of the tool.
- FIG. 2 an enlarged vertical section ofhousing 23 is shown with the improved mechanism 2l located therein.
- the housing 23 includes a central body portion 23a, a hollow cover portion 23b removably mounted on the upper end thereof, and a bottom portion 23C removably secured to the lower end of portion 23a.
- an elongated cylinder 3l Snugly mounted within body portion 23a is an elongated cylinder 3l), the upper end of which terminates at the cover portion 23b. Resiliently engaging the upper end of cylinder 30 and disposed within the cover portion is a poppet valve 31.
- An O-ring type seal 32 is carried by the valve 3ll and is adapted to sealingly engage the upper edge of the cylinder 30 when the valve is in its closed position.
- the valve 31 is biased in the closed position by a coil spring 33. The upper end of the spring contacts the underside of the cover portion 23b and the lower end engages the upper side of the valve 31.
- valve 31 is provided with a centrally disposed upwardly extending hollow post 34 which is disposed in telescoping relation within a hollow depending post 35 formed in the hollow cover portion 23b.
- Posts 34 and 35 are encompassed by the spring 33.
- a sealing, sliding tit is maintained between the telescoping hollow posts by an O-ring seal 36 which encompasses post 34.
- annular seal pad 37 which is engaged by the upper end of post 34, when the valve 3l is moved upwardly to its fully open position with respect to the upper end of cylinder 30.
- seal pad 37 When the upper end of post 34 is in contact with seal pad 37, the central bore 34a formed in post 34 is closed off.
- a peripheral portion 31a of valve 3l projects outwardly beyond the exterior of cylinder 3i) and terminates within a cavity 38.
- the cavity 38 surrounds the upper end portion of the cylinder and communicates with a second cavity 40 charged with high pressure air and formed in the handle section 22.
- Valve 3l carries a second O-ring 41 which encompasses same and is in sliding, sealing engagement with the walls forming an annular chamber 42 within the interior of cover portion 23h.
- Chamber 42 communicates with one end of a passageway 43, the latter having one part thereof formed in the cover portion 23b and the remaining part formed in the housing 23.
- the passageway 43 interconnects cavity 40 with chamber 42.
- the trigger control 28 which includes a hollow spool 44 disposed in sliding, sealing engagement within a sleeve 45, the latter being affixed to the handle section 22.
- Sleeve 45 is provided with a transversely extending port 45a which effects communication between the lower end 43a of passageway 43 and the center bore 45h of the sleeve only when the spool 44 is in its normal down position as seen in FIG. 2.
- the upper end of the bore 435h is provided with an inwardly extending collar 45e.
- a coil spring 46 Disposed within the bore 45h and intermediate collar 45C and the spool 44 is a coil spring 46 which serves to bias the spool in its down position ⁇
- Spool 44 is provided with a center passage 44h, one end of which opens to the atmosphere at the lower exposed end 44a of the spool.
- the opposite end of passage Mb terminates at a transversely extending port 44C which is spaced from the upper end of the spool.
- the spool 44 When the spool 44 is manually moved upwardly by a trigger lever 47 which is pivoted in a clockwise direction about pin 48, the transversely extending port 44C will register with the lower end 43a of passageway 43.
- the spool 44 carries a pair of O-rings 50a-b disposed above and below the port 44C which sealingly and slidably engage sleeve 45 and prevent air leakage between the spool and sleeve.
- the upper end of cylinder 30 is provided with an inwardly extending annular shoulder 30a, the underside of which is slightly chamfered, see FIG. 2.
- the function of the shoulder 30a will be discussed more fully hereinafter.
- a double spool type piston 51 Mounted for reciprocatory movement within cylinder 30 is a double spool type piston 51.
- the upper end of the piston is provided with a transversely disposed annular head 52 the diameter of which is slightly less than the diameter of the opening delimited by shoulder 30a.
- Head 52 is provided with an annular peripheral groove 52a in which is disposed an O- ring 53.
- the outer diameter of the O-ring when in an uncompressed state is greater than the diameter delimited by shoulder 30a.
- flange 54 Spaced longitudinally beneath head 52 and axially aligned therewith is an annular transversely extending flange 54.
- the head and flange are interconnected by a depending stem 55.
- the diameter of flange 54 is less than the diameter of head 52.
- a peripheral groove 54a is formed in flange 54 for accommodating an O-ring 56 which is adapted to sealingly and slidably engage the interior surface of cylinder 30. lt will bc noted that the lower portion of the cylinder interior is of a reduced diameter.
- a plurality of small ports 57 Adjacent the location where the diameter of the cylinder interior is reduced are provided a plurality of small ports 57 which are symmetrically arranged in a cylinder-encircling relation, see FIG. 2.
- the ports 57 effect communication between the cylinder interior and the portion of cavity 38 which substantially surrounds the exterior of the cylinder.
- the trapped air serves a dual purpose during normal operation of the piston 5l, namely (a) it gives added force to the driving stroke, and (b) it provides a means for effecting rapid return ofthe piston to its firing position after it has reached the end ofits firing stroke Il, see FIG. 4.
- a bumper 58 is mounted adjacent to but spaced from the lower end of cylinder 30.
- the bumper is normally of ringlike configuration and formed of rubber or some synthetic resilient material.
- the bumper is seated within a pocket 60 formed at the lower end of the housing 23.
- the bumper is axially aligned with the axis of the cylinder 30 and is provided with a center opening 58a through which a driver blade or hammer rod 6l extends.
- the blade 6l is attached to the underside of flange
- the lower end of the blade is slidably mounted within a stationary guide 25a which forms a part of the nose section 25.
- the lower end of cylinder 3l engages a shoulder 62 formed in the interior wall of cylinder 30.
- the lower end ofthe cylinder is spaced above the lower end 23C of the housing so as to form an annular chamber 63 which encompasses the upper projecting part of the bumper 58.
- the chamber 63 is vented to the atmosphere through ports 64 and 65.
- the latter ports 65 are in registered relation with the opening 58a formed in the bumper.
- the bumper 58 When the bumper 58 is operating properly, it will effect cushioning of the piston 5l at the end of its firing stroke so that the O-ring 56 carried by the flange 54 will remain in sealing engagement with the interior surface of cylinder 30 thereby preventing the compressed air entrapped between the piston head S2 and flange 54 from escaping into chamber 63 and then out through ports 64 to the atmosphere. If the bumper begins to cavitate or wear due to heat generated by repeated impact from the piston, it will no longer cushion the piston 5l when it reaches position ll, but instead will permit the piston to reach an abnormal position lll, see FIG. 5.
- FIGS. 6-3 show a first modified tool l2@ wherein the bumper i153 therefor is provided with a plurality of radially extending grooves lSb formed in the upper surface thereof which effect communication between the chamber l63 and 101029 (mild the center opening llSfla of the bumper.
- the bumper i153 therefor is provided with a plurality of radially extending grooves lSb formed in the upper surface thereof which effect communication between the chamber l63 and 101029 (mild the center opening llSfla of the bumper.
- the grooves formed in the upper surface thereof are of sufficient depth to provide the necessary venting communication between the chamber 163 and bumper opening 15841.
- the structure of tools and 120 may be the same.
- FIGS. 9-11 show a second modified tool 220 which is substantially the same as tool 120 except that a bumper 258 is provided in which the upper surface thereof is substantially dome-shaped and also is provided with one or more radially extending grooves 258b.
- the housing 223 in which the piston and bumper are located is slightly different from that of tool 120; however, in both tools the fail-safe feature embodied therein is basically the same.
- the modified tool 320 shown in FIGS. 12-14 differs primarily from the previously described tools in that no ports are formed in the cylinder wall through which compressed air enters the cylinder interior and becomes entrapped between the head 352 and flange 354 of the piston 3511.
- the piston stem 355 is hollow and opens at the upper surface of head 352.
- a transversely extending port 35511 is provided which effects communication between the center bore 355b of the stem and the spacing between the head and flange.
- a one way valve 355C is carried by the stem and cooperates with port 355a to permit air to only flow into the spacing through port 355:1.
- tool 320 is provided with a chamber 363 into which the entrapped cornpressed air is vented when the piston 351 assumes position III due to cavitation of the bumper 358.
- a port 3641 is provided in housing 323 which in turn vents chamber 363 to the atmosphere.
- the operation of the fail-safe mechanism in each of the tools 20, 120, 220, and 320 is substantially the same and provides the necessary protection for the various component parts of the tool while at the same time giving the operator of the tool immediate notice when an abnormal operating condition exists.
- the fail-safe mechanism heretofore described the existence of a defective bumper can be readily determined without requiring disassembly of the tool.
- the fail-safe mechanism reduces the downtime of the tool because replacement of the bumper is required only when cavitation of the bumper has actually occurred.
- a fail-safe mechanism for a pneumatic fastener-driving tool comprising an elongated cylinder; a double spool type piston mounted within said cylinder for reciprocatory movement between first and second longitudinally spaced positions and immovable when disposed at a third position adjacent said second position but spaced a greater longitudinal distance from said first position, said piston including a head having the periphery thereof in sliding, sealing engagement with the cylinder interior surface, and a flange longitudinally spaced from said head and movable therewith as a unit, said flange having the periphery thereof in sliding, sealing engagement with the cylinder interior surface only when said piston is disposed at or between said first and second positions, and being out of sealing engagement with said interior surface only when said piston is disposed at said third position, said head having a greater air pressure-responsive surface area than said flange; means for exerting a predetermined air pressure on said head to effect movement of said piston from said first position towards said second or third positions; means whereby air is entrapped between sald
- the mechanism of claim 1 including manual control means for regulating the application of said predetermined air pressure on said piston head.
- the mechanism of claim 2 including a housing for said cylinder, said housing being provided with a handle on which said manual control means is mounted.
- the mechanism of claim 5 including a housing for accommodating said cylinder, said housing being provided with conduit means communicating with said first and second air inlets.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87931669A | 1969-11-24 | 1969-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3651740A true US3651740A (en) | 1972-03-28 |
Family
ID=25373893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US879316A Expired - Lifetime US3651740A (en) | 1969-11-24 | 1969-11-24 | Pneumatic driving tool with a fail-safe mechanism |
Country Status (5)
Country | Link |
---|---|
US (1) | US3651740A (en) |
JP (1) | JPS501112B1 (en) |
DE (1) | DE2039178C3 (en) |
FR (1) | FR2071722A5 (en) |
GB (1) | GB1274377A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3805672A (en) * | 1971-12-27 | 1974-04-23 | Westinghouse Bremsen Apparate | Double acting fluid pressure operable cylinder device |
US3858780A (en) * | 1973-01-08 | 1975-01-07 | Spotnails | Fastener-driving tool |
US3952398A (en) * | 1970-08-31 | 1976-04-27 | Haytayan Harry M | Process for pneumatically impelling a hammer to drive a nail into a substrate |
DE2504094A1 (en) * | 1975-01-31 | 1976-08-05 | Signode Corp | COLLECTION DEVICE FOR THE IMPACT PISTON OF A PNEUMATICALLY OPERATED DRIVING TOOL |
DE2711710A1 (en) * | 1976-02-20 | 1978-09-21 | Amiad Systems New Co Ltd | HYDRAULIC MOTOR |
US4173171A (en) * | 1976-07-06 | 1979-11-06 | Firma Dieter Haubold Industrielle Nagelgerate | Working process of a pneumatic operated ramming tool |
FR2425307A1 (en) * | 1978-05-11 | 1979-12-07 | Signode Corp | SYSTEM FOR SIGNALING THE DAMAGE TO THE DAMPER OF A PNEUMATIC TOOL FOR IMPLEMENTING FIXING ELEMENTS SUCH AS STAPLES |
US20040006861A1 (en) * | 2002-07-15 | 2004-01-15 | Haytayan Harry M. | Method and apparatus for fastening together structural components |
US20070215667A1 (en) * | 2006-03-06 | 2007-09-20 | Wen-Sheng Huang | Power generator of nail drive |
US20070271761A1 (en) * | 2002-07-15 | 2007-11-29 | Haytayan Harry M | Apparatus and method for fastening together structural components |
WO2009123533A1 (en) * | 2008-03-31 | 2009-10-08 | Atlas Copco Construction Tools Ab | Percussion tool |
US20100243286A1 (en) * | 2006-08-24 | 2010-09-30 | Max Co., Ltd. | Power tool and cushioning mechanism thereof |
US20100327040A1 (en) * | 2009-06-29 | 2010-12-30 | Max Co., Ltd. | Driving tool and bumper of driving tool |
US20130319712A1 (en) * | 2012-05-29 | 2013-12-05 | Hilti Aktiengesellschaft | Chiseling power tool |
US11242873B2 (en) * | 2016-10-11 | 2022-02-08 | S-Gun Limited | Pneumatic or hydraulic mechanism |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0581208U (en) * | 1992-04-08 | 1993-11-05 | 藤倉航装株式会社 | Heat exchange outerwear |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2463537A (en) * | 1947-06-19 | 1949-03-08 | Bucyrus Eric Company | Guide for differential cylinderpiston assemblies |
US3051135A (en) * | 1959-03-27 | 1962-08-28 | Bostitch Ind Stapling Machine | Pneumatic tool |
US3087466A (en) * | 1956-10-09 | 1963-04-30 | Bostitch Ind Stapling Machine | Pneumatic stapler |
US3147670A (en) * | 1961-05-10 | 1964-09-08 | Herman J Spencer | Valve and other apparatus |
-
1969
- 1969-11-24 US US879316A patent/US3651740A/en not_active Expired - Lifetime
-
1970
- 1970-06-25 GB GB30928/70A patent/GB1274377A/en not_active Expired
- 1970-07-14 JP JP45061095A patent/JPS501112B1/ja active Pending
- 1970-08-06 DE DE2039178A patent/DE2039178C3/en not_active Expired
- 1970-09-29 FR FR7035153A patent/FR2071722A5/fr not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2463537A (en) * | 1947-06-19 | 1949-03-08 | Bucyrus Eric Company | Guide for differential cylinderpiston assemblies |
US3087466A (en) * | 1956-10-09 | 1963-04-30 | Bostitch Ind Stapling Machine | Pneumatic stapler |
US3051135A (en) * | 1959-03-27 | 1962-08-28 | Bostitch Ind Stapling Machine | Pneumatic tool |
US3147670A (en) * | 1961-05-10 | 1964-09-08 | Herman J Spencer | Valve and other apparatus |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952398A (en) * | 1970-08-31 | 1976-04-27 | Haytayan Harry M | Process for pneumatically impelling a hammer to drive a nail into a substrate |
US3805672A (en) * | 1971-12-27 | 1974-04-23 | Westinghouse Bremsen Apparate | Double acting fluid pressure operable cylinder device |
US3858780A (en) * | 1973-01-08 | 1975-01-07 | Spotnails | Fastener-driving tool |
DE2504094A1 (en) * | 1975-01-31 | 1976-08-05 | Signode Corp | COLLECTION DEVICE FOR THE IMPACT PISTON OF A PNEUMATICALLY OPERATED DRIVING TOOL |
DE2711710A1 (en) * | 1976-02-20 | 1978-09-21 | Amiad Systems New Co Ltd | HYDRAULIC MOTOR |
US4173171A (en) * | 1976-07-06 | 1979-11-06 | Firma Dieter Haubold Industrielle Nagelgerate | Working process of a pneumatic operated ramming tool |
FR2425307A1 (en) * | 1978-05-11 | 1979-12-07 | Signode Corp | SYSTEM FOR SIGNALING THE DAMAGE TO THE DAMPER OF A PNEUMATIC TOOL FOR IMPLEMENTING FIXING ELEMENTS SUCH AS STAPLES |
US4188858A (en) * | 1978-05-11 | 1980-02-19 | Signode Corporation | Bumper deterioration warning system for fastener driving tools |
US20040006861A1 (en) * | 2002-07-15 | 2004-01-15 | Haytayan Harry M. | Method and apparatus for fastening together structural components |
US6990731B2 (en) * | 2002-07-15 | 2006-01-31 | Haytayan Harry M | Method and apparatus for fastening together structural components |
US8074348B2 (en) | 2002-07-15 | 2011-12-13 | Haytayan Harry M | Apparatus and method for fastening together structural components |
US20070271761A1 (en) * | 2002-07-15 | 2007-11-29 | Haytayan Harry M | Apparatus and method for fastening together structural components |
US7303104B2 (en) * | 2006-03-06 | 2007-12-04 | Wen-Sheng Huang | Power generator of nail drive |
US20070215667A1 (en) * | 2006-03-06 | 2007-09-20 | Wen-Sheng Huang | Power generator of nail drive |
US20100243286A1 (en) * | 2006-08-24 | 2010-09-30 | Max Co., Ltd. | Power tool and cushioning mechanism thereof |
WO2009123533A1 (en) * | 2008-03-31 | 2009-10-08 | Atlas Copco Construction Tools Ab | Percussion tool |
EP2262618A1 (en) * | 2008-03-31 | 2010-12-22 | Atlas Copco Construction Tools AB | Percussion tool |
US20110005786A1 (en) * | 2008-03-31 | 2011-01-13 | Oestensson Olof | Percussion tool |
EP2262618A4 (en) * | 2008-03-31 | 2011-10-12 | Atlas Copco Constr Tools Ab | Percussion tool |
US8955616B2 (en) * | 2008-03-31 | 2015-02-17 | Construction Tools Pc Ab | Percussion tool |
US20100327040A1 (en) * | 2009-06-29 | 2010-12-30 | Max Co., Ltd. | Driving tool and bumper of driving tool |
US8544561B2 (en) * | 2009-06-29 | 2013-10-01 | Max Co., Ltd. | Driving tool and bumper of driving tool |
US20130319712A1 (en) * | 2012-05-29 | 2013-12-05 | Hilti Aktiengesellschaft | Chiseling power tool |
US9527199B2 (en) * | 2012-05-29 | 2016-12-27 | Hilti Aktiengesellschaft | Chiseling power tool |
US11242873B2 (en) * | 2016-10-11 | 2022-02-08 | S-Gun Limited | Pneumatic or hydraulic mechanism |
Also Published As
Publication number | Publication date |
---|---|
JPS501112B1 (en) | 1975-01-14 |
GB1274377A (en) | 1972-05-17 |
FR2071722A5 (en) | 1971-09-17 |
DE2039178B2 (en) | 1974-07-25 |
DE2039178C3 (en) | 1975-03-13 |
DE2039178A1 (en) | 1972-01-27 |
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Legal Events
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AS | Assignment |
Owner name: BANKERS TRUST COMPANY, A NY BANKING CORPORATION Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED;REEL/FRAME:004172/0159 Effective date: 19830819 |
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AS | Assignment |
Owner name: VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING M Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SWINGLINE INC.;REEL/FRAME:004196/0645 Effective date: 19830819 |
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Owner name: BANKERS TRUST COMPANY A NEW YORK BANKING CORP Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED;REEL/FRAME:004404/0886 Effective date: 19830819 |
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Owner name: LASALLE NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED, A CORP OF DE.;REEL/FRAME:004923/0931 Effective date: 19880421 |
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Owner name: PEACE INDUSTRIES, LTD., 1100 HICKS RD., ROLLING ME Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LASALLE NATIONAL BANK;REEL/FRAME:005610/0202 Effective date: 19910114 Owner name: LASALLE NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:PERCE INDUSTRIES LTD., A DE CORP.;REEL/FRAME:005604/0540 Effective date: 19910111 |