US3612359A - Hand operated multiload grease gun - Google Patents

Hand operated multiload grease gun Download PDF

Info

Publication number
US3612359A
US3612359A US854574A US3612359DA US3612359A US 3612359 A US3612359 A US 3612359A US 854574 A US854574 A US 854574A US 3612359D A US3612359D A US 3612359DA US 3612359 A US3612359 A US 3612359A
Authority
US
United States
Prior art keywords
container
plunger assembly
barrel
grease
sidewall
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
Application number
US854574A
Other languages
English (en)
Inventor
Edwin P Sundholm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3612359A publication Critical patent/US3612359A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N3/00—Devices for supplying lubricant by manual action
    • F16N3/10—Devices for supplying lubricant by manual action delivering grease
    • F16N3/12—Grease guns

Definitions

  • a hand-operated grease gun adapted to use grease in either bulk form or cartridge form includes a grease [54] Z g F ISULTILOAD GREASE GUN container having a cylindrical barrel and a cylindrical sidewall aims rawmg of reduced diameter formed integrally with the barrel portion [52] US.
  • a [50] 222/325, plunger assembly is mounted within the container for recipro- 326, cation therein; and it includes a flexible, resilient sealing /23 means for selectively sealing either with the interior surface of the barrel or a grease cartridge, if it is used.
  • Each of the latch members in- 2,361,126 10/ 1944 Klein 222/386 X cludes a laterally projecting finger so that when the plunger as- 2,714,474 8/1955 Sundholm 222/386 m lyi rotated, the latch members hold the p g 2,759,640 8/1956 Deupree 222/326 sembly in its retracted state for receiving; a grease cartridge.
  • the present invention relates to hand-operated grease guns that are adapted to receive grease either in bulk form (through pressure loading or suction filling) or cartridge form. More particularly, the present invention pertains to a combination for selectively holding the plunger assembly which reciprocates within the grease container in a retracted position at the rear of the container.
  • the plunger assembly may be locked in its retracted position by rotating the plunger rod which, in turn, rotates the plunger assembly and the guide tube to cause the hooks on the ears at the end of the guide tube to engage the outer surface of the rear cap and lock to it.
  • a coil spring within the container and interposed between the rear cap and the plunger assembly biases the plunger assembly forwardly so that once the ears extend through the rear cap and are rotated, the plunger assembly becomes securely yet releasably held in its retracted position.
  • the guide tube and hook-shaped ears of that construction are preferably formed from thin sheet stock.
  • the ears of the guide tube stick out from the rear cap of the grease container where they may accidentally be dislodged or, because they are formed of thin sheet metal, be bent or otherwise deformed thereby making it difficult to reinsert the locking cars into the curved slots in the rear cap of the container. Further, these cars form a fairly sharp projecting surface behind the grease container which is undesirable in any hand'operated tool.
  • the grease container includes a cylindrical barrel portion for receiving grease either in bulk form or cartridge form and in which the plunger assembly reciprocates.
  • the container wall At the rear portion of the grease container (i.e., the portion through which the plunger rod extends), the container wall, while still remaining cylindrical, has a lesser diameter than the barrel portion; and between the rear cylindrical wall of reduced diameter and the barrel, there is provided a peripheral shoulder which defines a number of curved slots.
  • the plunger assembly includes a double-cup plunger of resilient, flexible material which is slidably mounted on the plunger rod.
  • the plunger includes a transverse web integrally molded with forward and rearwardly extending walls or lips for sealing with the interior surface of the barrel or a cartridge, whichever is used.
  • the rear surface of the web is supported by a cup-shaped member having a forward transverse wall contacting the rear surface of the plunger web; and the supporting member is provided with a peripheral, cylindrical flange or skirt which extends rearwardly thereof and is provided with latch members extending axially of the container.
  • the fingers When the plunger assembly is rotated in the proper direction, the fingers extend over the shoulder to hold the plunger assembly in its retracted position.
  • the latch members After passing through the slots in the peripheral shoulder of the container, the latch members he adjacent to the rear cylindrical wall of the grease container which has a reduced diameter. Hence, the latch members are protected against accidental dislodgement and deformation. Further, since the latch members are secured immediately adjacent the rear, cylindrical sidewall of the barrel (and preferably are curved in cross section to conform thereto), there are no sharp surfaces projecting from the gun when the plunger assembly is secured in its retracted position.
  • a deflector member in the form of a cylinder is telescopically received on the cup-shaped support means which supports the rear surface of the plunger web and also includes the latch members; and the deflector cylinder engages the interior surface of the peripheral shoulder of the grease container when the plunger assembly is retracted; and it is interposed between the outer barrel wall and the cylindrical skirt or flange of the latch support so as to guide that support as the latch members pass through their associated slots.
  • FIG. 1 is a side elevational view of a grease gun incorporating the present invention, partially cut away to show the plunger assembly in cross section;
  • FIG. 2 is a side cross sectional view of the inventive combination showing the plunger assembly in a retracted position
  • FIG. 3 is an end view of the grease gun taken through the sight line 33 of FIG. 2;
  • FIG. 4 is a closeup view of the peripheral shoulder of the grease container, partially cut away to show one latch member
  • FIG. 5 is a transverse cross sectional view taken through the sight line 5-5 of FIG. 2;
  • FIG. 6 is a detailed view of the front of the plunger assembly showing the bayonet latch and housing.
  • FIG. 7 is a side cross sectional view of an alternative embodiment of a grease container and plunger assembly in its retracted position which incorporates the inventive principle.
  • a hand-operated grease gun which includes a grease container C, a plunger assembly P mounted within the container C for urging grease contained therein toward the forward (left as viewed in the drawing) end thereof, and a dispensing head designated H.
  • the dispensing head l-l includes a cap 10 for threadably receiving the container C, a high pressure cylinder 11, and a housing 12 for an outlet check valve.
  • a piston 13 is connected to a hand lever 14 at an intennediate location 15; and the end of the hand lever 14 is pivotally connected at 16 to a link 17, the other end of which is pivotally connected at 18 to the housing 112.
  • a pipe 19 is connected'to the housing 12 for the outflow of grease to an adapter (not shown).
  • one hand is placed on the container C and the other hand operates the handle 14 to reciprocate the piston 13 in the high pressure cylinder 11 to force grease through the check valve in the housing 12 and the pipe 19.
  • Grease is admitted into the high pressure cylinder II by means of a port communicating the interior of the cylinder C with the bore of the piston 13 when that piston is retracted. Further details on a preferred dispensing head may be obtained from the copending, coowned application for Dispensing Head for Lever Operated Hand Grease Gun, Ser. No. 854,581 filed Sept. 2, 1969.
  • the hand-operated grease gun of FIG. 1 is being used in combination with a grease cartridge 20 received in the container C.
  • the cartridge 20 is a cylindrical paperboard container holding grease throughout its length except for a rear portion of about one-half inch to facilitate insertion of the plunger assembly P without spilling. As shown in FIG. 1, the cartridge 20 is in a fully inserted position; and the cap of the dispensing head H is tightly secured to the container C.
  • a plunger rod a extends axially of the container C and through the back thereof where it is formed into a loop handle 2l.
  • the plunger assembly P is slidably mounted on the rod 200; and urged to a forward position (i.e., toward the dispensing head H) by means of a coil spring 23 interposed between the rear of the container C and the plunger assembly P.
  • a double-cup sealing member is generally designated by reference numeral 25; and it includes a transverse web 26, a forwardly opening peripheral sidewall or lip 27 and a rearwardly opening sidewall or lip 28.
  • the web 26 defines a central aperture for mounting to a hub 29 slidably and sealingly mounted on the plunger rod 20a.
  • An internal annular groove 30 is formed in the hub 29 for receiving an O- ring 31 to effect the seal.
  • the sealing member 25 is preferably molded from a flexible, resilient synthetic rubber such as neoprene.
  • a cup-shaped, rearwardly opening support member is generally designated 34; and it includes a transverse, discshaped front wall 35 secured about a central aperture to the hub 29 and engaging the rear surface of the web 26 of the sealing member 25.
  • a cylindrical flange member generally designated 36 and including a front cylindrical flange 37 formed integrally with the periphery of the front wall 35 and having a diameter slightly less than the diameter of the base of the rear sidewall 28 of the sealing member 25, and a second cylindrical flange 38 of slightly larger diameter and connected to the rear circular edge of the forward flange 37 by means of a peripheral connecting portion 39.
  • a cylindrical deflector member generally designated by reference numeral 42, and including a forward cylindrical flange 43 having a diameter slightly greater than the forward flange 37 of the supportmember 34, a rear cylindrical flange 44 having a diameter slightly greater than the diameter of the rear flange 38 of the support member 44, and a center connecting portion 45 formed integrally with the flanges 43 and 44.
  • the center connecting portion 39 of the rear flange 36 of the support member 34 forms a seating surface for engaging the connecting portion 45 of the deflector member 42 to limit the rearward motion thereof.
  • the forward circular edge of the front flange 43 of the deflector member 42 engages the sealing member 25 at the base of the rear sidewall 28 (that is, along a circumferential area defining the outer periphery of the web 26).
  • the deflector member 42 is fully received on the side flange means 36 of the rear support member 34 with its forward circular edge lying approximately in the same plane as the forward wall 35 of the support member 34, as shown in FIG. I.
  • the rear circular edge of the deflector cylinder 42 engages a shoulder in the container C (described in detail below) to force the deflector to telescope forwardly of the support member 34 and into engagement with the periphery of the web 26 to urge the engaged portion of the web 26 to a forward position, thereby forcing the forward sidewall 27 of the sealing member 25 to a contracted position for receiving the cartridge 20, as shown in FIG. 2.
  • the forward surface of the web 26 is supported by means of a disc-shaped suppon member 48 which is provided with a forwardly inclined peripheral flange 49 for limiting the forward motion of the deflected web 26 (see FIG. 2).
  • the forward support member 48 is also secured to the hub 29.
  • a cupshaped housing generally designated 50 is secured to the forward surface of the disc support member 48; and it includes a central aperture 51 for receiving the plunger rod 200, and side-extending apertures 52 and 53 communicating with the central aperture 51 for admitting passage of bayonet members 55 and 56 (see FIG. 6) within the housing provided by the member 50.
  • the housing 50 includes inwardly fonned stop members 60 and 61 for limiting the rotational movement of the plunger rod 20a relative to the plunger assembly P.
  • the plunger assembly P is temporarily secured to the plunger rod 200 and constrained to move with it in an axial direction.
  • plunger assembly including the deflector member
  • deflector member Further details of the plunger assembly including the deflector member may be found in my copending, co-owned application for Plunger Assembly for Multi-Fill Hand Grease Guns, Ser. No. 854,534, Filed Sept. 2, 1969.
  • the grease container C includes a cylindrical barrel portion 64 for receiving the cartridge 20 or, alternatively, for receiving and containing grease in bulk form.
  • the container C Toward the rear (right side in FIGS. 1 and 2) of the barrel 40, the container C includes an inwardly inclined surface 65 and an integral, cylindrical guide surface 66 having a diameter slightly smaller than that of the barrel 64.
  • An inwardly turned circular flange 67 is formed at the rear edge of the guide surface 66; and there are three curved slots formed in the flange 67 and designated respectively 67a, 67b, and 67c, for receiving respectively the latch members of the rear support member 34 of the plunger assembly.
  • the rear closure for the grease container C is in the form of a forwardly facing, cup-shaped rear cap generally designated by reference numeral 70; and it includes a transverse rear wall 71 defining a central aperture which is provided with a forwardly facing side flange 72 for engaging and guiding the plunger rod 20a.
  • Extending forwardly of the transverse rear wall 71 is a cylindrical sidewall 73 having a diameter slightly less than the diameter of the rear cylindrical flange 38 of the web-rear support member 34.
  • annular outwardly extending flange 75 located internally of the corresponding annular flange 67 which is an integral part of the barrel 64; and the annular flanges 67 and 75 are welded together to form a unitary construction.
  • the annular flange 75 of the rear cap 70 defines three curved slots 75a, 75b, and 75c (see FIG. 5) which are 'aligned with the corresponding curved slots 67a-67c described above.
  • the latch member 400 which extends rearwardly of the outer cylindrical flange 38 of the web-support member 34, includes a rearwardly extending shank 78 and a laterally extending finger 79.
  • both the shank 78 and the finger 79 are curved and conform to the curvature of the flange 38 from which they are formed for facilitating their insertion through the slots 75a and 670.
  • the deflector member 42 engages the forward surface of the annular flange 75 and urges the'peripheral circumferential area of the web 26 forwardly relative to the center of the web to force the forward sidewall 27 of the flexible sealing member 25 to a contracted diameter for receiving the cartridge 20.
  • the latch members 404-400 thus extend through the sidewall of the container C and the plunger assembly P is rotated by means of the bayonet members 55 and 56 (FIG. 6) the laterally extending fingers of the latch members will be forced over the side edges of their corresponding slots to engage the rear surface of the circular flange 67 and hold the plunger assembly in its retracted position as seen in FIG. 2.
  • the curvature of the latch members Mia- 16 also conforms to the outer surface of the cylindrical sidewall 73 of the rear cap 70, that the interior surface of the latch members Wu-60c extends immediately adjacent the outer surface of the sidewall 73 of the cap 711, and that the sidewall 73 extends to a rear position beyond the edges of the latch members Mia-4111c even when the plunger assembly is in its mostretracted position.
  • the latch members ltlwdllc are protected against accidental dislodgement, deformation or bending while holding the plunger assembly in a retracted position; and no sharp surfaces protrude from the cartridge C during this time.
  • FIG. 7 there is shown an embodiment which does not employ the deflector member 42.
  • the container is designated C and the plunger assembly P.
  • the plunger assembly P is slidably mounted on a plunger rod 126a; and it includes a flexible, resilient sealing member 123 having a forwardly opening front sidewall 127, a rearwardly opening rear sidewall 126 and a transverse web 126.
  • the web is mounted on a hub 129 which is slidably and sealingly secured to the rod 1211a.
  • a coil spring 123 is interposed between the rear surface of the container C and the plunger assembly 1?
  • the rear surface of the web 126 is supported by means of a cupshaped support member generally designated 13% and including a forward wall 133 engaging the rear surface of the web 126, and a rearwardly extending cylindrical flange 136 including a plurality of curved latch members, one of which is designated in FIG. 7 by reference numeral 1410a.
  • the forward surface of the web 126 is supported by means of a metallic disc 166 secured to the hub 129; and a bayonet housing 150 is secured to the disc 1.
  • the container C includes a cylindrical barrel 1641 within which the plunger assembly P reciprocates; and the sealing member 125 is in sealing engagement with the interior surface of the barrel 1641.
  • the barrel 1641 is tapered inwardly to form an inclined, frustoconical reducing portion 165.
  • integral with the frustoconical portion 165 is a cylindrical intermediate wall 166 having an internal diameter slightly larger than the external diameter of the flange 136 of the support member 1341.
  • An annular limiting flange member 167 is formed inwardly of the rear edge of the intermediate wall portion 166; and a rear cylindrical sidewall 173 is formed integrally with the internal periphery of the flange 167.
  • the rear edge of the sidewall 173 is rounded inwardly as at 1730 to define a central aperture 171%.
  • a rear cap 171 includes a peripheral shoulder 171a fitting within the rounded portion 173a of the side wall 173 for welding thereto, and a central, cylindrical flange 172 for receiving the plunger rod 1211a.
  • the latch members When the plunger assembly of the embodiment of FIG. 7 is retracted, the latch members are guided by the frustoconical portion 166 of the barrel 1641 within the cylindrical intermediate wall 166 so that when the plunger assembly is rotated to bring the latch members into alignment with their associated slots formed in the annular flange 167, further rearward motion will pass the latch members through those slots. Further rotational motion of the plunger assembly will then cause laterally extending fingers (similar to the finger 79 as seen in FIG. 1) to pass over the solid portion of the flange 67 and hold the plunger assembly in a retracted position even though the rod 1211a may be released. It will also be observed that when the latch members pass through the sidewall of the container C they remain immediately adjacent the outer surface of the reduced rear sidewall 173 and are protected thereby against deflection or other deformation, and a smooth exterior is presented without projecting sharp edges.
  • a hand-operated gun adapted to receive grease in bulk or cartridge form, including a grease container having a forward and a rear end with a cylindrical barrel at its forward end, wherein the improvement comprises: said container defining at its rear end a cylindrical. sidewall of reduced diameter connected to said barrel by means of a peripheral connecting shoulder defining slot means admitting passage through said container in an axial direction; and a plunger assembly adapted for reciprocation within said container and including flexible resilient sealing means for sealing engagement with said barrel, and latch means connected to said plunger as sembly for moving therewith including rearwardly projecting shank means extending axially and rearwardly of said container for passing through said slot means when said plunger is drawn to the rear of said container and extending exterior of and adjacent to said rear cylindrical sidewall of reduced diameter and adapted to selectively lock with said shoulder, said reduced cylindrical wall portion of said container having an axial dimension longer than the axial dimension of said latch means.
  • said grease container further comprises an inwardly inclined frustoconical wall member interposed between said shoulder and said barrel for guiding said latch means into said slot means on said shoulder.
  • a grease container having a forward cylindrical barrel, a rear cylindrical sidewall of lesser diameter than said barrel and said rear sidewall and defining at least one slot admitting passage in a direction parallel to the axis of said container; and a plunger assembly including sealing means for sealingly engaging the interior surface of said barrel and rearwardly extending latch means connected to said sealing means and adapted to pass through said slot in said container and adjacent the exterior surface of said rear sidewall thereof for engaging the exterior surface of said shoulder flange when said plunger assembly is rotated to hold said plunger assembly in a retracted position, said rear cylindrical sidewall of said container extended rearwardly beyond the furthest projection of said latch means and immediately inward thereof to protect. the same against accidental dislodgment or deformation and to prevent the occurrence of projecting edges when the plunger assembly is held in retracted position.
  • said container comprises a first integral part providing said barrel and shoulder flange, and a second integral part providing said rear sidewall of reduced diameter and a transverse end plate defining a central aperture for receiving and guiding a plunger rod on which said plunger assembly is slidably mounted.
  • said container comprises a first integrally formed part providing said barrel, said shoulder flange and said rear sidewall of reduced diameter, and a second part providing a transverse end plate secured to said rear sidewall for receiving and guiding a plunger rod on which said plunger assembly is slidably mounted.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
US854574A 1969-09-02 1969-09-02 Hand operated multiload grease gun Expired - Lifetime US3612359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85457469A 1969-09-02 1969-09-02

Publications (1)

Publication Number Publication Date
US3612359A true US3612359A (en) 1971-10-12

Family

ID=25319074

Family Applications (1)

Application Number Title Priority Date Filing Date
US854574A Expired - Lifetime US3612359A (en) 1969-09-02 1969-09-02 Hand operated multiload grease gun

Country Status (4)

Country Link
US (1) US3612359A (enrdf_load_stackoverflow)
CA (1) CA921881A (enrdf_load_stackoverflow)
DE (1) DE2043120A1 (enrdf_load_stackoverflow)
FR (1) FR2059130A5 (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739948A (en) * 1971-09-21 1973-06-19 Kontes Glass Co Variable-volume predetermined-bulk liquid dispenser
US3752367A (en) * 1972-06-26 1973-08-14 E Sundholm Plunger assembly for hand-operated grease gun
US3780830A (en) * 1972-04-24 1973-12-25 K P Manuf Inc Cartridge-type grease guns
US3828988A (en) * 1973-04-04 1974-08-13 Bervy Inc Tank for bulk transport and storage of semisolid materials
US3955571A (en) * 1974-04-03 1976-05-11 The Emko Company Rechargeable applicator for dispensing substances
US3982899A (en) * 1975-05-22 1976-09-28 Corning Glass Works Fluid handling apparatus
US4077493A (en) * 1976-12-15 1978-03-07 Parker-Hannifin Corporation Grease gun
US4382789A (en) * 1981-01-15 1983-05-10 Domenico Colombo Manual pressure syringe for odontological use
US5211312A (en) * 1991-10-28 1993-05-18 Chang Peter J Y Caulk dispensing device with thumb-control lock
US5449096A (en) * 1993-04-10 1995-09-12 Hilti Aktiengesellschaft Piston for a dispensing tool
US6152334A (en) * 1997-03-24 2000-11-28 Sicpa Holdings S.A. Scraping element, piston and arrangement for emptying a bag-like envelope containing a pasty liquid
US6409732B1 (en) * 1999-07-09 2002-06-25 Othy, Inc. Tool driver
US6494348B2 (en) * 2000-01-28 2002-12-17 Sulzer Chemtech Ag Cartridge piston
US20040211789A1 (en) * 2003-04-22 2004-10-28 Karen Osborn Grouting gun apparatus and method
US20100294808A1 (en) * 2009-05-22 2010-11-25 Lincoln Industrial Corporation Follower packing unit for grease guns and the like
US20150352002A1 (en) * 2014-06-06 2015-12-10 Physio-Control, Inc. Adjustable piston
US11246796B2 (en) 2014-06-06 2022-02-15 Physio-Control, Inc. Adjustable piston

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361126A (en) * 1943-09-20 1944-10-24 Lincoln Eng Co Dispenser
US2714474A (en) * 1950-01-31 1955-08-02 Edwin P Sundholm Piston locking device
US2759640A (en) * 1954-02-15 1956-08-21 Harold H Deupree Cartridge grease gun
US2790424A (en) * 1953-10-05 1957-04-30 Leo V Giladett Pressure change responsive motor with shear wire
US2815151A (en) * 1955-07-18 1957-12-03 Harold B Collins Anti-drip calking gun and cartridge
US3059980A (en) * 1960-03-30 1962-10-23 Edwin P Sundholm Grease gun plunger assembly
US3430735A (en) * 1966-12-29 1969-03-04 Snilloc Corp Mechanism for locking the brake assembly for railroad cars

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361126A (en) * 1943-09-20 1944-10-24 Lincoln Eng Co Dispenser
US2714474A (en) * 1950-01-31 1955-08-02 Edwin P Sundholm Piston locking device
US2790424A (en) * 1953-10-05 1957-04-30 Leo V Giladett Pressure change responsive motor with shear wire
US2759640A (en) * 1954-02-15 1956-08-21 Harold H Deupree Cartridge grease gun
US2815151A (en) * 1955-07-18 1957-12-03 Harold B Collins Anti-drip calking gun and cartridge
US3059980A (en) * 1960-03-30 1962-10-23 Edwin P Sundholm Grease gun plunger assembly
US3430735A (en) * 1966-12-29 1969-03-04 Snilloc Corp Mechanism for locking the brake assembly for railroad cars

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739948A (en) * 1971-09-21 1973-06-19 Kontes Glass Co Variable-volume predetermined-bulk liquid dispenser
US3780830A (en) * 1972-04-24 1973-12-25 K P Manuf Inc Cartridge-type grease guns
US3752367A (en) * 1972-06-26 1973-08-14 E Sundholm Plunger assembly for hand-operated grease gun
US3828988A (en) * 1973-04-04 1974-08-13 Bervy Inc Tank for bulk transport and storage of semisolid materials
US3955571A (en) * 1974-04-03 1976-05-11 The Emko Company Rechargeable applicator for dispensing substances
US3982899A (en) * 1975-05-22 1976-09-28 Corning Glass Works Fluid handling apparatus
US4077493A (en) * 1976-12-15 1978-03-07 Parker-Hannifin Corporation Grease gun
US4382789A (en) * 1981-01-15 1983-05-10 Domenico Colombo Manual pressure syringe for odontological use
US5211312A (en) * 1991-10-28 1993-05-18 Chang Peter J Y Caulk dispensing device with thumb-control lock
US5449096A (en) * 1993-04-10 1995-09-12 Hilti Aktiengesellschaft Piston for a dispensing tool
US6152334A (en) * 1997-03-24 2000-11-28 Sicpa Holdings S.A. Scraping element, piston and arrangement for emptying a bag-like envelope containing a pasty liquid
US6409732B1 (en) * 1999-07-09 2002-06-25 Othy, Inc. Tool driver
US6494348B2 (en) * 2000-01-28 2002-12-17 Sulzer Chemtech Ag Cartridge piston
US20040211789A1 (en) * 2003-04-22 2004-10-28 Karen Osborn Grouting gun apparatus and method
US6892904B2 (en) * 2003-04-22 2005-05-17 Karen Osborn Grouting gun apparatus and method
US20100294808A1 (en) * 2009-05-22 2010-11-25 Lincoln Industrial Corporation Follower packing unit for grease guns and the like
US8162184B2 (en) * 2009-05-22 2012-04-24 Lincoln Industrial Corporation Follower packing unit for grease guns and the like
US20150352002A1 (en) * 2014-06-06 2015-12-10 Physio-Control, Inc. Adjustable piston
US10004662B2 (en) * 2014-06-06 2018-06-26 Physio-Control, Inc. Adjustable piston
US11020312B2 (en) 2014-06-06 2021-06-01 Physio-Control, Inc. Adjustable piston
US11246796B2 (en) 2014-06-06 2022-02-15 Physio-Control, Inc. Adjustable piston

Also Published As

Publication number Publication date
DE2043120A1 (enrdf_load_stackoverflow) 1971-03-04
FR2059130A5 (enrdf_load_stackoverflow) 1971-05-28
CA921881A (en) 1973-02-27

Similar Documents

Publication Publication Date Title
US3612359A (en) Hand operated multiload grease gun
US3187960A (en) Non-metallic pump dispenser
CA1085249A (en) Gas cartridge puncture device for gas fired guns
US3250443A (en) Dispensing cartridge plunger
GB2091818A (en) A manually operated pump for pressure delivery of liquid and/or thick substances contained in a container on which the pump is mounted
US2678006A (en) Hand-operated metering liquiddispenser
US5042694A (en) Dispenser for pasty compositions
GB1529660A (en) Dispensing pump
US5875920A (en) Caulking Gun
US2886215A (en) Lubricant gun
US2602571A (en) Dispensing device for calking material and the like
US3069053A (en) Caulking gun
US20040129735A1 (en) Pump with pneumatic motor
US3393840A (en) Miniaturized hand grease gun
US4010874A (en) Pump for hand-held dispensers
US3752367A (en) Plunger assembly for hand-operated grease gun
US3187959A (en) Manual grease gun structure
US3038768A (en) Lubricant-gun follower packing
US2420203A (en) Dispensing apparatus for plastic material
US2025232A (en) Lubricating device
US3059819A (en) Optional loading grease gun
US5209379A (en) Method of assembling a pressurized dispenser and a pressurized dispenser for carrying out said method
US3500760A (en) Pump for an atomizer or the like
US3121518A (en) Compression sprayer
US3494512A (en) Self-metering lubricating oil pump attachment device