US3734380A - Machine for driving mine roof pins - Google Patents

Machine for driving mine roof pins Download PDF

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Publication number
US3734380A
US3734380A US00186848A US3734380DA US3734380A US 3734380 A US3734380 A US 3734380A US 00186848 A US00186848 A US 00186848A US 3734380D A US3734380D A US 3734380DA US 3734380 A US3734380 A US 3734380A
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pin
support
cylinder
mine roof
piston
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US00186848A
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G Elders
T Schneider
J Alongi
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts

Definitions

  • MACHINE FOR DRIVING MINE ROOF PINS [76] Inventors: Gerald W. Elders, 10 Hillcrest, Christopher, 111. 62822; Thomas E. Schneider, deceased, late of 601 E. Park St., DuQuoin, Ill. 62832 Thomas R. Schneider, administrator; John R. Alongi, 350 E. Main Street, DuQuoin, 111. 62832 [22] Filed: Oct. 6, 1971 [21] Appl. No.: 186,848
  • a machine for driving mine roof pins having a pincentering support extending along a cylinder and supported by a piston so as to move with the piston when the piston drives the pin along the cylinder and into a mine roof, the pin-centering support engaging the pin to guide and support the pin after the pin is driven, and moving laterally out of the cylinder as it disengages from that portion of the pin about to enter the mine roof.
  • the pin-centering support includes a plurality of support lengths engaging the side of the pin about the pin periphery, each support length having a plurality of interengaging, relatively movable support members.
  • a secondary power mechanism is operatively connected to the support lengths for urging the support lengths back into the cylinder incident to retrac tion of the piston.
  • Each support length engages the pin with substantially no relative movement therebetween and moves relative to the cylinder as the pin is driven by the piston means.
  • the support lengths are spaced substantially equidistantly about the pin periphery, and adjacent support members of each support length have substantially continuous and aligned pin-engaging surfaces to provide a substantially continuous, longitudinal support for the pin. Further, adjacent support members of the support lengths are pivotally interconnected to provide chains.
  • a receiving assembly is provided to guide the support as it moves laterally from the cylinder.
  • An auxiliary support selectively engages the side of the pin about the pin periphery in the region unsupported by the primary pin-centering support near the top of the cylinder and selectively disengages from the side of the pin and out of the path of the piston means to enable complete insertion of the pin by the piston.
  • This invention relates generally to improvements in roof bolting for mines, and more particularly to an improved machine for setting pins in mine roofs.
  • a hole approximately 1 inch in diameter is drilled into the roof which is adapted to receive a inch bolt and expansion shell.
  • the expansion shell is located on the bolt andinserted into the drill hole, the bolt being turned to expand the shell into gripping engagement with the hole wall.
  • the hole is drilled to a depth until a solid roof strata is reached and the expansion shell is anchored in this roof strata. It will be understood that the roof is hung from this bolt.
  • There are essentially two separate operations in installing the bolt namely, (1) drilling the hole, and (2) installing the bolt and shell in the hole and tightening the bolt under torque.
  • the expansion shell represents the only bearing area holding the bolt in the roof.
  • pins have been driven into walls by hammers that applied a series of abrupt impact shock blows to the pins.
  • This manner of driving pins is undesirable in mines because the impacts tend to disturb the otherwise stable condition of the roof strata, not only in the immediate area in which the pin is driven, but for a considerable distance in all directions, and can adversely affect the holding power of previously driven pins.
  • the pin-setting device disclosed in the above identified, copending application Ser. No. 846,795 includes an elongate cylinder having an open end and a closed end, and a piston movably mounted in the cylinder.
  • a positioning means locates the open end of the cylinder at the predetermined area of the roof, and means introduces fluid into the cylinder at one side of the piston to move the piston and to press the pin located in the cylinder into the mine roof under a substantially smooth pushing force.
  • the positioning means subjects the mine roof to the compressive pressure in the predetermined area to force the roof strata tightly together so that the pin will hold the strata in such condition. This compressive pressure can be applied by jacks extending between the mine roof and floor.
  • the pin that was pressed into the mine roof by the device disclosed in the copending application included a plurality of discs carried by and axially spaced along the shank, the discs and pin shank having a frictional connection that enabled slidable axial movement of the discs along the shank until the discs engage the block as the pin was pressed into and through the block and into the mine roof.
  • These discs require time to be placed on the pin shank, and adversely affected the internal wall of the cylinder against which such discs frictionally bear.
  • these discs were permanently installed to the mine roof upon complete insertion of the pin, and therefore constituted expendable items that increased costs.
  • the present machine for driving mine roof pins eliminates the need for drilling any holes in the roof, thereby eliminating any dust hazard that heretofore has been injurious to the miners, and avoiding the relief of roof pressure. Moreover, the need for driving the pin by hammer blows is also eliminated, thereby eliminating the undesirable and potentially dangerous conditions that are caused by such impact shock.
  • the pin is pressed into the mine roof with a substantially smooth pushing force that avoids any chipping or removal or shock disturbance of roof material.
  • the pin periphery contacts the material of the mine roof for greater holding power and is not limited merely by the bearing surface provided by an expansion shell. Because the pin is pushed into the mine roof upon installation, there is no torque applied to the pin.
  • the present machine for driving mine roof pins includes a piston means movably received in an elongate cylinder, the piston means providing a seat for the mine roof pin located in the cylinder.
  • a pin-centering support means extends along the cylinder and is supported by the piston means so as to move with the piston means when the piston means drives the pin along and out of the cylinder and into the mine roof, the pincentering support means engaging the pin to guide and support the pin as the pin is driven, and moving laterally out of the cylinder as it disengages from that portion of the pin about to enter the mine roof.
  • the pin-centering support means includes a plurality of support lengths engaging the side of the pin about the pin periphery, each support length having a plurality of interengaging, relatively movable support members. Each support length has one end portion attached to and movable with the piston means.
  • each support length engages the pin with substantially no relative movement therebetween and moves relatively to the cylinder wall as the pin is driven by the piston means.
  • Adjacent support members of each support length have substantially continuous and aligned-engaging surfaces to provide a substantially continuous, longitudinal support for the pin.
  • a receiving means is provided to guide the support means as it moves laterally from the cylinder. More particularly, the receiving means includes tracks that engage the support lengths as they move laterally outwardly of the cylinder and direct the support lengths into predetermined paths.
  • a secondary power means is operatively connected to the support lengths for urging the support lengths back into the cylinder incident to retraction of the piston means.
  • the adjacent support members of the support lengths are pivotally interconnected to provide chains.
  • the cylinder includes an open end through which the pin is driven and the support means extends and moves laterally outwardly of the cylinder open end as the pin is driven by the piston means.
  • the support members of each support length engage the pin with substantially no relative movement therebetween and move relative to and against the cylinder as the pin is driven.
  • the receiving means receives each support length as it moves outwardly from the pin cylinder open end.
  • the receiving means includes a cylinder for each support length, and a piston is movably mounted in each support cylinder and is operatively connected to the support length received in the associated receiving cylinder for u ging the support length back into the pin cylinder incident to retraction of the pin-driving piston means.
  • the receiving means includes tracks extending substantially from the pin cylinder open end to each of the receiving cylinders, the support lengths engaging the tracks and being directed into the receiving cylinders.
  • An auxiliary pin support means selectively engages the side of the pin about the pin periphery in the region unsupported by the primary pin-centering support means near the top of the cylinder, and selectively disengages from the side of the pin and out of the path of the piston means to enable complete insertion of the pin by the piston means.
  • the auxiliary pin support means includes a trip mechanism located in the path of the piston means and actuated by the piston means when the pin is nearly fully driven so as to withdraw the auxiliary pin support away from the pin and out of the path of the piston means.
  • FIG. 1 is a side elevational view of the pin driving machine
  • FIG. 2 is an enlarged top plan view of the pin driving machine, with the top pressure plate partially broken away to more clearly disclose underlying parts;
  • FIG. 3 is an enlarged, cross sectional view taken along the longitudinal axis of the pin cylinder
  • FIG. 4 is a cross sectional view as taken along line 44 of FIG. 3;
  • FIG. 5 is a side elevational view as taken along line 55 of FIG. 3;
  • FIG. 6 is a bottom plan view of the auxiliary support means as taken along line 66 of FIG. 3;
  • FIG. 7 is an elevational view as taken along line 7-7 of FIG. 3;
  • FIG. 8 is a cross sectional view as taken along line 8-8 of FIG. 3.
  • the pin driving machine generally indicated by 10 is located and extends between a mine roof 11 and a subjacent mine floor 12.
  • the machine 10 includes an elongate pin cylinder 13, and a positioning means provided by a pair of hydraulic jacks referred to by 14 located at opposite sides of the pin cylinder 13.
  • Each hydraulic jack 14 includes an elongate cylinder 15, the jack cylinders 15 and the pin cylinder 13 being secured together by a pair of embracing brackets 16.
  • a piston (not shown) is reciprocatively mounted in each jack cylinder 15 and is attached to an elongate piston rod 17.
  • the piston rod 17 extends through the closed bottom end of each jack cylinder 15 and is connected to a base 18 that seats on the mine floor 12.
  • each hydraulic jack cylinder 15 is closed by a pressure plate 20.
  • the hydraulic jacks 14 When used, the hydraulic jacks 14 are retracted and the machine is disposed in a substantially upright position with the base 18 seating on the mine floor 12.
  • a wood block 21 is disposed on top of the pressure plate 20 overlapping the open cylinder end 22.
  • the pressure plate 20 Upon extension of the hydraulic jacks 14, the pressure plate 20 will urge the wood block 21 against the mine roof l1 and will clamp the block 21 in place at the predetermined roof area.
  • a plurality (four in the embodiment shown) of receiving cylinders are attached to and supported by the base 18 and extend upwardly along the pin cylinder 13. As is illustrated in FIG. 1, a pair of such receiving cylinders 23 are located at each side of the machine. The structure and function of these receiving cylinders 23 will be explained upon later detailed description of parts.
  • a piston 24 is located and slidably mounted in cylinder 13, the piston 24 including a reduced portion 25 that provides an internal socket 26 adapted to seat and hold the head 27 of an elongate pin 28 that is to be driven into the mine roof 11.
  • the pressure plate 20 is provided with a central opening 30 that is aligned with and located above the open cylinder end 22, the opening 30 being of sufficient diameter to permit passage of the pin head 27 and the piston portion 25 as the pin 28 is completely driven.
  • Mounted to the top of pressure plate 20 by fasteners 31 is a flat ring 32, the ring 32 being concentric with the plate opening 30.
  • the wood block 21 is adapted to seat on this ring 32.
  • a bearing disc 33 is adapted to fit into the space provided by the internal diameter of ring 32 and between the wood block 21 and the top surface of pressure plate 20. This bearing disc 33 engages the pin head 27 when the pin 28 is fully driven and is retained by the pin head 27 against the wood block 21.
  • a pin-centering support means generally indicated by 34 extends along the cylinder 13 and is supported by the piston 24 so as to move with the piston when the piston drives the pin 28 along and out of the cylinder 13 and into the mine roof 11.
  • the pin-centering support means 34 includes a plurality of support lengths 35 (four in the preferred embodiment) extending into the cylinder 13 between the pin 28 and the internal wall 36 of cylinder 13.
  • Each support length 35 includes a plurality of interengaging, relatively movable support members 37.
  • Each support member 37 includes a pair of laterally spaced, integral ears 38 adapted to embrace a projecting lug 40 of the next adjacent support member 37.
  • a pivot pin 41 extends through the overlapping ears 38 and projecting lug 40 to pivotally interconnect the adjacent support members 37.
  • the support length 35 constitutes a chain in which the support members 37 are relatively movable.
  • each support member 37 When the support members 37 are disposed in vertical alignment within the cylinder 13, the adjacent margins 42 of adjacent support members 37 are in abutment.
  • a bearing surface 43 is provided on the inner margin of each support member 37, the bearing surface 43 being arcuate and conforming substantially to the periphery of the pin shank.
  • the opposite and outermost margin of each support member 37 is provided with a foot pad providing an arcuate bearing surface 44 conforming substantially to the arcuate configuration of the inner cylinder wall 36.
  • each support length 35 includes a plurality of end support members 45 that do not engage the pin 28 but rather serve to connect the support length to the piston 24.
  • each end support member 45 includes a pair of laterally spaced, integral ears 46 embracing a body portion of the adjacent end support member 45.
  • a pivot pin 47 extends through the overlapping ears and body portion to pivotally interconnect the adjacent end support members 45.
  • These end support members 45 include inner bearing surfaces 48 adapted to engage the reduced piston portion 50,
  • One of the end support members is pivotally connected to an adjustable threaded element 52 fixed to the top surface of piston 24, while another end support member 45 is pivotally connected to the first of the support members 37 engageable with the pin shank.
  • support lengths 35 are provided, equidistantly spaced around the pin periphery, for the most efficient centering and support of the pin shank.
  • a receiving means generally indicated by 53 directs each of the support lengths 35 in a predetermined path as the support length 35 moves laterally out of the cylinder 13.
  • the receiving means includes the cylinder 23 that has an open end 55 into which each support length 35 moves.
  • a pair of laterally spaced plates 56 are secured to the underside of the pressure plate 20, and are provided with internal tracks 57 extending from the open end 22 of pin cylinder 13 to the open end 55 of the associated receiving cylinder 23.
  • Mounted on opposite ends of each pivot pin 41 are rotatable bearings 58 that ride in and on the internal plate tracks 57.
  • the underside of the pressure plate 20 is provided with an arcuate groove 60 into which the support members 37 move as each support length 35 moves laterally out of the pin cylinder 13.
  • a secondary power means is provided for urging the support lengths 35 back into the pin cylinder 13 incident to retraction of the piston 24.
  • This secondary power means includes a piston 61 reciprocatively mounted within each receiving cylinder 23.
  • a link 62 pivotally interconnects the last support member 37 to an adjustable threaded member 63 fixed to the top surface of piston 61.
  • auxiliary support means indicated by 64 is provided as a safety precaution to preclude such possibility.
  • This auxiliary support means 64 consists of two units arranged at diametrically opposite sides of the pin shank. A detailed description of one unit will suffice for the other.
  • Each unit of the auxiliary support means 64 includes a pair of longitudinal, laterally spaced body plates 65 and 66, end plates 67 and 68, and interconnecting top wall 70 fixed to the under surface of pressure plate 20. Attached to the top wall 70 and located between the spaced body plates 65 and 66 is a catch block 71. Also located between the spaced plates 65 and 66 is a support body 72 having an end wall 73 fixed to a plunger rod 74. A compression spring 75 is located about the plunger rod 74, and is located between the end plate 67 and rod head 76, the spring 75 tending to urge the plunder rod 74 outwardly.
  • the inner end of the support body 72 is provided with an arcuate bearing surface 77 adapted to engage the periphery of the shank of pin 28 in the region below the pressure plate 20 that is unsupported by the pin-centering and support means 34.
  • This end of support body 72 is provided with side ribs 78 slidably received within compatible grooves 80 formed in the end plate 68 to guide the body 72 in its reciprocative motion.
  • the support body 72 includes a pair of depending, integral lugs 81 and 82 that are laterally spaced to receive a lever 83 therebetween.
  • a pivot pin 84 pivotally attaches the lever 83 to the lugs 81 and 82.
  • a pair of laterally spaced links 85 and 86 are attached to opposite sides of one end of lever 83 by a pivot pin 87.
  • the opposite ends of links 85 and 86 are pivotally connected by pin 88 to a latch body 90 that is located in a hollow chamber of the support body 72.
  • the latch body 90 is pivotally connected to opposite sides of the support body 72 by a pivot pin 91.
  • the latch body 90 engages the catch block 71 to hold the support body 72 in such position against the loading of spring 75.
  • Another spring 92 has one end en- 7 gaging the lever 83 in alignment with the pivot pin 84 and an opposite end engaging the latch member 90, the spring 92 tending to urge the latch body 90 upwardly into latch engagement with the catch block 71.
  • pin cylinder 13 The upper end of pin cylinder 13 is provided with a lateral slot 93 to permit movement of the supporting unit toward and away from the pin 28.
  • the hydraulic jacks 14 are retracted so as to lower the pressure plate away from the mine roof 11 sufficiently to enable the machine to be tilted for insertion of another roof pin 28.
  • the roof pin 28 is inserted through the plate opening 30 and into the pin cylinder 13 so that the pin head 27 is received in the socket 26.
  • the pressure on the underside of the piston 24 is relieved, and hydraulic pressure is exerted on the underside of the pistons 61 of the auxiliary power means.
  • the support lengths are moved outwardly of such cylinders 23 and into the pin cylinder 13, thereby retracting the piston 24.
  • the auxiliary support means 64 is then moved to its operative position to support the pin shank.
  • the plunger rod 74 of each unit is depressed under the loading of spring 75 until the latch body 90 clears the catch block 71, at which time the latch member 90 will move upwardly under the loading of spring 92 to engage the catch block 71 and lock the support body 72 in place.
  • the bearing surface 77 of each support body 72 engages or is closely located to the periphery of the pin shank.
  • a wood block 21 is located on top of the pressure plate 20 overlying the bearing disc 33 and the pin 28.
  • the machine is moved to a substantially upright position with the pressure plate 20 and the wood block 21 located below the region of the mine roof in which the roof pin 28 is to be driven.
  • the hydraulic jacks 14 are then actuated to move the wood block 21 up against the mine roof and to exert a compressive force on the mine roof through the pressure plate 20.
  • each support length 35 will move laterally outwardly of the pin cylinder 13 in the region just below the pressure plate 20. In fact, these support lengths 35 move outwardly of the open end 22 of the pin cylinder 13, but it will be understood that lateral ports could be provided in the pin cylinder 13 for this purpose.
  • the roller bearings 58 engage the internal tracks 57 of guide plates 56, and the support lengths 35 are then moved in an arcuate path out of the pin cylinder 13 and into the open end 55 of the receiving cylinders 23.
  • piston means movably received in the cylinder, the piston means providing a seat for the mine roof pin, and
  • a pin-centering support means extending along the cylinder and moving with the piston means when the piston means drives the pin along and out of the cylinder and into a mine roof, the pin-centering support means engaging the pin to guide and support the pin as the pin is driven, and moving laterally out of the cylinder as it disengages from that portion of the pin about to enter the mine roof.
  • the pin-centering support means includes a plurality of support lengths engaging the side of the pin about the pin periphery, each support length including a plurality of interengaging, relatively movable support members.
  • each support length has one end portion attached to and movable with the piston means.
  • each support length engages the pin with substantially no relative movement therebetween and moves relative to the cylinder as the pin is driven by the piston means.
  • the support lengths are spaced substantially equidistantly about the pin periphery.
  • adjacent support members of each support length have substantially continuous and aligned pinengaging bearing surfaces to provide a substantially continuous, longitudinal support for the pin.
  • receiving means guide the pin-centering support means as it moves laterally from the cylinder.
  • receiving means include tracks that engage the support lengths as they move laterally outwardly from the cylinder and direct the support lengths into predetermined paths.
  • a machine for driving mine roof pins as defined in claim 2, in which:
  • a secondary power means is operatively connected to the support lengths for urging the support lengths back into the cylinder incident to retraction of the piston means.
  • each support member has a first bearing surface engageable with the pin and a second bearing surface slidably engageable with the wall of the cylinder.
  • the cylinder includes an open end through which the pin is driven
  • the pin-centering support means extends and moves laterally outwardly of the cylinder open end as the pin is driven by the piston means
  • the support members engage the pin with substantially no relative movement therebetween and move relative to and against the wall of the cylinder as the pin is driven by the piston means, and j. receiving means receive each support length as it moves outwardly from the pin cylinder open end, and direct the support length into a predetermined path.
  • the receiving means includes a receiving cylinder for each support length
  • a piston movably mounted in each receiving cylinder and operatively connected to the support length received in said receiving cylinder for urging the support length back into the pin cylinder incident to retraction of the pin-driving piston means.
  • the receiving means includes tracks extending substantially from the pin cylinder open end to the receiving cylinders, the support lengths engaging the tracks and being directed into the receiving cylinders as the support lengths move outwardly from the pin cylinder open end.
  • the pin cylinder includes an open end through which the pin is driven
  • a pressure plate is located adjacent to the open end of the pin cylinder, the pressure plate being provided with an opening aligned with the pin cylinder open end, and the pressure plate being provided with a plurality of substantially curvilinear grooves in one side communicating with the pin cylinder open end and spaced about the pin periphery,
  • the support means includes a plurality of support lengths engaging the side of the pin about the pin periphery and aligned with the plate grooves, each support length engaging the pin with substantially no relative movement therebetween and movably engaging the cylinder as the pin is driven by the piston means,
  • each support length contains a plurality of pivotally connected support members disposed in longitudinal alignment when disposed in the cylinder be tween the pin and the cylinder, adjacent support members being provided with substantially longitudinally aligned bearing surfaces engageable with the pin along its length, the aligned pin-engaging surfaces of the adjacent support members being substantially contiguous to provide a substantially continuous, longitudinal support for the pin,
  • receiving means includes:
  • bearings are provided at the pivotal connections between adjacent support members, the bearings engaging the tracks to direct the support members into and along the pressure plate grooves as the support members move outwardly from the pin cylinder and thence into the receiving cylinders.
  • an auxiliary support means selectively engages the side of the pin about the pin periphery in the region unsupported by the pin-centering support means near the top of the cylinder, and selectively disengage from the side of the pin and out of the path of the piston means to enable complete insertion of the pin by the piston means.
  • the auxiliary support means includes a trip mechanism in the path of the piston means and actuated by the piston means when the pin is nearly fully driven so as to withdraw the auxiliary support means away from the pin and out of the path of the piston means.
  • the auxiliary support means includes a springloaded plunger having a bearing surface engaging the side of the pin, and
  • the trip mechanism selectively holds the plunger

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Rock Bolts (AREA)
US00186848A 1971-10-06 1971-10-06 Machine for driving mine roof pins Expired - Lifetime US3734380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18684871A 1971-10-06 1971-10-06

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US3734380A true US3734380A (en) 1973-05-22

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US (1) US3734380A (de)
JP (1) JPS4845977A (de)
AT (1) AT315786B (de)
AU (1) AU464829B2 (de)
BE (1) BE789602A (de)
CA (1) CA967769A (de)
DE (1) DE2227699C3 (de)
ES (1) ES404651A1 (de)
FR (1) FR2156561B1 (de)
GB (1) GB1383562A (de)
IT (1) IT961837B (de)
LU (1) LU66235A1 (de)
NL (1) NL7213605A (de)
ZA (1) ZA724109B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080065022A1 (en) * 2006-09-08 2008-03-13 Kurt Kyvik Catheter anchor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113090609B (zh) * 2021-04-14 2023-09-15 中国铁建重工集团股份有限公司 一种机载锚杆钻机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488279A (en) * 1945-03-20 1949-11-15 Fitzmaurice James Christopher Device for laterally supporting elongated members while under longitudinal compressive stress
US3060440A (en) * 1955-08-19 1962-10-30 Olin Mathieson Fastener driving tools
US3357619A (en) * 1965-12-20 1967-12-12 Turner & Seymour Mfg Co Driving apparatus
US3602419A (en) * 1969-09-29 1971-08-31 Morris Doberne Pneumatically operated nail driver

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182877A (en) * 1963-01-07 1965-05-11 Bowen Tools Inc Apparatus for feeding tubing or other objects
GB1312832A (en) * 1969-08-01 1973-04-11 Pin Set Corp Apparatus for and method of setting pins in mine roofs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488279A (en) * 1945-03-20 1949-11-15 Fitzmaurice James Christopher Device for laterally supporting elongated members while under longitudinal compressive stress
US3060440A (en) * 1955-08-19 1962-10-30 Olin Mathieson Fastener driving tools
US3357619A (en) * 1965-12-20 1967-12-12 Turner & Seymour Mfg Co Driving apparatus
US3602419A (en) * 1969-09-29 1971-08-31 Morris Doberne Pneumatically operated nail driver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080065022A1 (en) * 2006-09-08 2008-03-13 Kurt Kyvik Catheter anchor

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GB1383562A (en) 1974-02-12
IT961837B (it) 1973-12-10
NL7213605A (de) 1973-04-10
ZA724109B (en) 1973-03-28
JPS4845977A (de) 1973-06-30
BE789602A (fr) 1973-02-01
FR2156561A1 (de) 1973-06-01
CA967769A (en) 1975-05-20
DE2227699B2 (de) 1973-10-11
FR2156561B1 (de) 1976-03-12
AU464829B2 (en) 1975-08-22
DE2227699A1 (de) 1973-04-19
DE2227699C3 (de) 1974-05-16
ES404651A1 (es) 1975-07-01
LU66235A1 (de) 1973-02-05
AT315786B (de) 1974-06-10
AU4350772A (en) 1973-12-20

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