CA1279952C - Explosive charge operated tool for fastening elements - Google Patents
Explosive charge operated tool for fastening elementsInfo
- Publication number
- CA1279952C CA1279952C CA000531801A CA531801A CA1279952C CA 1279952 C CA1279952 C CA 1279952C CA 000531801 A CA000531801 A CA 000531801A CA 531801 A CA531801 A CA 531801A CA 1279952 C CA1279952 C CA 1279952C
- Authority
- CA
- Canada
- Prior art keywords
- housing
- muzzle part
- slide
- magazine
- muzzle
- 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 - Fee Related
Links
- 239000002360 explosive Substances 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 16
- 230000033001 locomotion Effects 0.000 claims description 10
- 238000010304 firing Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Landscapes
- Portable Nailing Machines And Staplers (AREA)
Abstract
ABSTRACT
An explosive powder charge operated tool for driving nails includes a housing with a muzzle part mounted in and projecting axially outwardly from the housing. By moving the muzzle part rearwardly into the housing, the tool is in the ready-to-fire condition.
A magazine is supported at one end within the muzzle part and extends generally radially outwardly from it.
A slide in the magazine feeds individual nails in a nail strip into the bore in muzzle part into position to be driven by a piston located within the housing.
When all of the nails in the strip have been driven from the tool, one end of the strip projects into the muzzle bore. A stop shoulder on the one end of the strip faces toward an end face on the housing and contacts the end face when the muzzle part is pressed into the housing, preventing the placement of the tool in the ready-to-fire condition.
An explosive powder charge operated tool for driving nails includes a housing with a muzzle part mounted in and projecting axially outwardly from the housing. By moving the muzzle part rearwardly into the housing, the tool is in the ready-to-fire condition.
A magazine is supported at one end within the muzzle part and extends generally radially outwardly from it.
A slide in the magazine feeds individual nails in a nail strip into the bore in muzzle part into position to be driven by a piston located within the housing.
When all of the nails in the strip have been driven from the tool, one end of the strip projects into the muzzle bore. A stop shoulder on the one end of the strip faces toward an end face on the housing and contacts the end face when the muzzle part is pressed into the housing, preventing the placement of the tool in the ready-to-fire condition.
Description
~ ~ 79 9~
The present invention is directed to an explosive powder charge operated tool for driving fastening elements, such as nails, into a receiving material.
The tool includes a housing with a muzzle part displaceable from a first position rearwardly into the housing lnto a ready-to-fire condition. A magazine supported at one end in the muzzle part extends out-wardly and contains a slide for feeding the fastening elements out of the magazine into the bore of the muzzle part. The slide is displaceable through the magazine into an end position when all of the fastening elements have been fed into the muzzle bore and driven out of the tool.
Known explosive powder charge operated tools, as a rule, include a contact pressure safety assuring that the firing of an explosive powder charge is possible only when the muzzle part is pressed against the receiving material so that it moves into the housin~g.
Accordingly, the muzzle part lS moved rearwardly into the ready-to-fire condition and, in most cases, compresses a spring m~a known firing;mechanism.
To~provide a simple arrangement for carrying out this safety~feature in tools having a magazine projecting laterally outwardly from the muzzle part, where a slide for feeding the fasten~ing elemen-ts is supported~withln the maqazine as d1salosed in DE-OS
24 33 642, it is the primary objec-t of the present invention to provide a contact safety for preventing the initiation of the firing of the tool when there is : ~ :
.
~ ~ ~79g5'~
no fastening element in the muzæle bore.
In accordance with the present invention, the slide in the magazine includes a stop shoulder located in the end position when all of the fastening elements have been fed out of the magazine and driven from the tool, with the stop shoulder aligned with a front end face of the housing so that the rearward movement of the muzzle part causes the stop shoulder to contact the front end face on the housing and prevent further move-ment of the muzzle part into the housing so that the ready-to-fire condition cannot be established.
In the end position when all of the fastening elements have been displaced out of the magazine and driven out of the tool, the stop shoulder on the slide is located in the path of the front end face of the housing, that is in the path of movement of the housing relative to the muzzle part. With the tool in this condition, when the muzzle part is pressed against the receiving material, the housing moves relative to the muzzle part only until its front end face abuts against the stop shoulder. This relatively slight displacement movement is not sufficient to place the tool in the ready-to-fire condition. The ready-to-fire condition can be reached only when a pin-shaped member abuts against a stop located outside the magazine.
The magazine can be made to be opened and it can have a U-shaped cross-section or it can be provided wlth a closed box configuration. The slide which feeds the nails or fastening elements out of the magazine in~o the muzzle bore is preferably supported in the 9~35~
magazine as it moves in the feed direction.
Advantageously, the stop shoulder is formed by the end face of the slide leading in the feed direction. The use of the end face as a stop shoulder makes separate measures superfluous, so that the invention enables the shape of the slide to have a particularly simple arrangement.
In a preferred embodiment, the stop shoulder is formed by the end of the slide facing toward a front end face of the housing as it moves into the box-shaped magazine. The box-shaped magazine is provlded with an aperture so that the housing can move relative to the magazlne into contact with the shoulder.
The box-shaped configuration of the magazine provides a secure and protected guidance of the fasten-ing elements. To insert fastening elements into the magazine, it can be opened by removing one side, or by pivotally opening a side wall. In the open condition, the slide can be returned~back to its starting position.
The stop shoulder on the sllde lS protected by the configuration of the box-shaped magazine so that effect-ive operation is assured.~ ~
Another~lmportant feature of the invention is the provision of a feed nose Dn the end of the slide projecting forwardly from the stop shoulder for pressing the~nail~strip toward the muzzle bore so that individual fastening~elements~or nails can be inserted into the bore.~ The~feed~nose~leads the stop shoulder in the fee~d~direction oE the nai1s~into the tool. The arrange-ment of the feed nos~e does not interfere with the ~ ~ , ,: : ~
~ 3-:
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movement of the muzzle part so that the ready-to-fire condition of the tool is achieved. When the last nail is being fed from the magazine into the muzzle bore the feed nose is aligned with the front end face of the housing but does not interfere with the establish-ment of the ready-to-fire condition.
To assure that the feed of the fastening elements or nails and the attainment o* the end position of the slide does not require manual operation, a spring element is located within the magazine and biases the slide from the starting position into the end position.
The spring element can be in the form of a tension or compression spring.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the lnvention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
IN THE DR~WINGS~
~ ~Flgure 1 is a side elevational view of a tool for driving fastening elements, with the tool facing downwardly~, and~with the forward end of the~tool, containing the fastening elements, shown in section;
Figure 2 is a cross-sectional view taken :
along the line II-II in~Figure l;
; Flgure 3 is~ a partial showing of the tool : ~
: ~4-:~ :
~ 3~i~
in Figure l with the front end of the tool, shown in section, bearing against a receiving material with the tool in the ready-to-fire condition; and, Figure 4 is a view similar to Figure 3, shown partly in section with the tool pressed against the receiving material after all of the fastening elements have been driven.
In Figure l, the tool l for driving fastening elements, such as nails, into a receiving material is shown with the tool including a handle 2 projecting laterally outwardly from the rear end of the housing.
A trigger 4 is located in the handle for actuating or firing an exploslve powder charge. Since explosive powder charges lnserted into a firing chamber at the end of a barrel within the housing are well known, the charge and the firing chamber have not been illustrated.
- ~hen the tool 1 is in the ready-to-fire condition, the explosive powder charge is in the effective range of a firing pin actuated by th~ trigger 4. As viewed ln Figure l, the driving direction is the downward direction out of the front end of the housing.
A muzzle part 5 is supported in and projects axially out of the housing in the driving direc-tion. Muzzle part 5 i5 movably displaceable, from the rest or non-firing conditlon of the tool, shown in Figure l, opposite to the firlng direction rearwardly into the housing so that the tool is in the ready-to-fire condition shown in Figure 3.
Uuzzle part 5 has an axially-extending muzzle bore 6 whioh receives a piston 7, shown only in part, ~' 9~i~
which is driven forwardly through the housing into the muzzle bore 6 by the explosive gases generated by the explosive powder charge~ As the piston is propelled forwardly into the muzzle bore it contacts the rear end of a fastening element and drives it forwardly out of the bore into a receiving material.
At the muzzle part 5, a box-shaped maga~nze 8 is secured by one end, at an opening into the muzzle part. The interior of the magazine 8 forms a guide channel or passageway 9 opening into the muzzle bore 6.
As can be seen in Figure 2, the magazine 8 is constructed of a U-shaped main part 11 and a removable L-shaped side wall 12 which closes the open side of the main member 11.
Side wall 12 can be fastened to the main member 11 by a snap-in connection in a known manner.
A compression spring 14, formed of strip material, abuts a rear wall 13 of the main member 11 and the spring contacts a slide 15 and biases the slide in the leftward direction as viewed in Figure l, toward the muzzle bore 6 of the tool l. Slide 15 is guided within the passageway 9 in the magazine 8 by guide strips 16 and 17 on the upper and lower sides of the strip in sliding contact with the inside surfaces of the lower and upper waIls of the passageway 9.
Guide st~ip 17 has a surface 18 facing in the direction toward the housing and forming a stop shoulder 19 moving wlth the slide 15 in the direction feeding fastenlng elements into the muzzle bore 6. A
feed nose 21 projects in the feed direction of the sllde 15~ toward the muæzle bore 6 ahead of the stop ~ ~t7~
shoulder l9. The feed nose 21 bears against a strip or belt of nails or fastening elements 22 inter-connected with one another in a row-like arrangement.
The fastening elements 22 in the strip include a plurality of nails 23 arranged in parallel relation and a guide bushing 24 on each nail formed of a plastics material (note Figure 2~. The opposite axially-spaced ends of the guide bushings 2~ have circular guide rings 25 projecting laterally outwardly from an axially-extending section 26 extending between the guide rings 25. The section 26 is recessed inwardly from the circumferential surfaces of the guide rings 25, forming an annular recess around the guide bushing. A support strip 27 is located on the main member ll extending in the feed direction within the magazine 8, and the strip projects into the annular recess formed in the gaide bushing and retalns the individual nails parallel to the axial direction of the muzzle bore 6.
By pressing the tool l against the receiving ~0 material 28, as shown in Figure 3, the muzzle part 5 moves relative to the houslng 2 so that the front end of the housing 2 is located closer to the surface of the receiving material and the muzzle part 5 moves into the housing. During such~relative movement, (compare Figure l and Figure 3), the front end of the housing extends through a recess 29 formed in the magazine 8, and enters into the passageway 9 within the magazine.
The feed of~the individual nails 23 into the muzzle bore 6 is not obstructed by the relative movemen-t of the nuzzle Dart and the housing. When the muzzle part .:
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-~ ~'799~
5 is displaced rearwardly into the housing, the tool is in the ready-to-fire condition and can be fired by actuating the trigger 4. When the explosive powder charge is ignited, the gases generated propel the piston 7 forwardly through the housing against the nail 23 and bushing 24 located within the muzzle bore 6 and drive the nail into ~he receiving material 28 and at the same time destroy the guide bushing 24. After the piston 7 is returned into the ready-to-fire position, the next fastening element formed by the nail 23 and the bushing 24 enters into the muzzle bore 6.
When the last one of the fastening elements 22 in the strip within the magazine 8 is driven out of the muzæle bore, and the piston 7 is returned into the ready-to-fire position, the slide 15 moves into the muzzle bore 6, that is, the feed nose 21 enters into the muzzle bore in the path of the piston 7. In this end position, stop shoulder 19 is located aligned with the front end face 31 of the housing 2 and the guide strip 17 abuts against a wall portion of the muzzle part 5. If the front end of the tool, that is the front end of the muzzle part 5, is now pressed against the surface of the receiving material 28, the front end face 31 on the housing contacts the stop shoulder 19, after a port1on of the movement of the muzzle part 5 relative to the housing 2 into the ready-to~fire condition, so that the ready-to-fire condition cannot be attained (note~Figure 4). After the magazine 8 is filled with a:new supply of fastening elements 22, wlth the slide 15 returned to its starting position .
9~5~
(note Figure 1), the tool is again ready to commence the driving of the fastening elements into the receiving material.
Having described what is believed to be the best mode by which the invention may be performed, it will be seen that the invention may be particularly defined as follows:
An explosive powder charge operated tool for driving fastening elements such as nails, into a receiving material, comprising a housing having a front end and a rear end and an axial direction extending in the front end rear-end direction, a muzzle part extending in the axial direction and mounted in and extending out of the front end of said housing, said muzzle part having an axially-extending bore therein and being displaceable between a first position into a ready-to-fire posi-tion displaced axially inwardly into said housing from the first position, a magazine mounted in an opening in said muzzle part and extending transversely of the axial ~0 direction outwardly from said:muzzle part, a slide located in said magazine and arranged to feed a strip of fastening elements one at a time into said muzzle part bore, means for displacing said slide through the magazine toward:sald bore into an end position when all of the fastening elements in the strip have been driven from the:muzzle part bore~, wherein the improvement comprises that said slide has a first end leading toward said muzæle part as said strip o~ fastening elements is displaced toward said muzzle part, said housing having an end face at the front end thereof in,alignmen-t with : ; _9_ ~ ~9~5~
said magazine, said first end of said slide has a stop shoulder facing toward and being aligned with said end face of said housing in the end position of said slide and said stop shoulder moving into contact with said end face of said housing in the end position of said slide for preventing movement of said muzzle part relative to said housing whereby said muzzle part cannot be displaced sufficiently into said housing into the ready-to-fire position.
While specific embodiments of the invention have been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
The present invention is directed to an explosive powder charge operated tool for driving fastening elements, such as nails, into a receiving material.
The tool includes a housing with a muzzle part displaceable from a first position rearwardly into the housing lnto a ready-to-fire condition. A magazine supported at one end in the muzzle part extends out-wardly and contains a slide for feeding the fastening elements out of the magazine into the bore of the muzzle part. The slide is displaceable through the magazine into an end position when all of the fastening elements have been fed into the muzzle bore and driven out of the tool.
Known explosive powder charge operated tools, as a rule, include a contact pressure safety assuring that the firing of an explosive powder charge is possible only when the muzzle part is pressed against the receiving material so that it moves into the housin~g.
Accordingly, the muzzle part lS moved rearwardly into the ready-to-fire condition and, in most cases, compresses a spring m~a known firing;mechanism.
To~provide a simple arrangement for carrying out this safety~feature in tools having a magazine projecting laterally outwardly from the muzzle part, where a slide for feeding the fasten~ing elemen-ts is supported~withln the maqazine as d1salosed in DE-OS
24 33 642, it is the primary objec-t of the present invention to provide a contact safety for preventing the initiation of the firing of the tool when there is : ~ :
.
~ ~ ~79g5'~
no fastening element in the muzæle bore.
In accordance with the present invention, the slide in the magazine includes a stop shoulder located in the end position when all of the fastening elements have been fed out of the magazine and driven from the tool, with the stop shoulder aligned with a front end face of the housing so that the rearward movement of the muzzle part causes the stop shoulder to contact the front end face on the housing and prevent further move-ment of the muzzle part into the housing so that the ready-to-fire condition cannot be established.
In the end position when all of the fastening elements have been displaced out of the magazine and driven out of the tool, the stop shoulder on the slide is located in the path of the front end face of the housing, that is in the path of movement of the housing relative to the muzzle part. With the tool in this condition, when the muzzle part is pressed against the receiving material, the housing moves relative to the muzzle part only until its front end face abuts against the stop shoulder. This relatively slight displacement movement is not sufficient to place the tool in the ready-to-fire condition. The ready-to-fire condition can be reached only when a pin-shaped member abuts against a stop located outside the magazine.
The magazine can be made to be opened and it can have a U-shaped cross-section or it can be provided wlth a closed box configuration. The slide which feeds the nails or fastening elements out of the magazine in~o the muzzle bore is preferably supported in the 9~35~
magazine as it moves in the feed direction.
Advantageously, the stop shoulder is formed by the end face of the slide leading in the feed direction. The use of the end face as a stop shoulder makes separate measures superfluous, so that the invention enables the shape of the slide to have a particularly simple arrangement.
In a preferred embodiment, the stop shoulder is formed by the end of the slide facing toward a front end face of the housing as it moves into the box-shaped magazine. The box-shaped magazine is provlded with an aperture so that the housing can move relative to the magazlne into contact with the shoulder.
The box-shaped configuration of the magazine provides a secure and protected guidance of the fasten-ing elements. To insert fastening elements into the magazine, it can be opened by removing one side, or by pivotally opening a side wall. In the open condition, the slide can be returned~back to its starting position.
The stop shoulder on the sllde lS protected by the configuration of the box-shaped magazine so that effect-ive operation is assured.~ ~
Another~lmportant feature of the invention is the provision of a feed nose Dn the end of the slide projecting forwardly from the stop shoulder for pressing the~nail~strip toward the muzzle bore so that individual fastening~elements~or nails can be inserted into the bore.~ The~feed~nose~leads the stop shoulder in the fee~d~direction oE the nai1s~into the tool. The arrange-ment of the feed nos~e does not interfere with the ~ ~ , ,: : ~
~ 3-:
~ .
movement of the muzzle part so that the ready-to-fire condition of the tool is achieved. When the last nail is being fed from the magazine into the muzzle bore the feed nose is aligned with the front end face of the housing but does not interfere with the establish-ment of the ready-to-fire condition.
To assure that the feed of the fastening elements or nails and the attainment o* the end position of the slide does not require manual operation, a spring element is located within the magazine and biases the slide from the starting position into the end position.
The spring element can be in the form of a tension or compression spring.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the lnvention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
IN THE DR~WINGS~
~ ~Flgure 1 is a side elevational view of a tool for driving fastening elements, with the tool facing downwardly~, and~with the forward end of the~tool, containing the fastening elements, shown in section;
Figure 2 is a cross-sectional view taken :
along the line II-II in~Figure l;
; Flgure 3 is~ a partial showing of the tool : ~
: ~4-:~ :
~ 3~i~
in Figure l with the front end of the tool, shown in section, bearing against a receiving material with the tool in the ready-to-fire condition; and, Figure 4 is a view similar to Figure 3, shown partly in section with the tool pressed against the receiving material after all of the fastening elements have been driven.
In Figure l, the tool l for driving fastening elements, such as nails, into a receiving material is shown with the tool including a handle 2 projecting laterally outwardly from the rear end of the housing.
A trigger 4 is located in the handle for actuating or firing an exploslve powder charge. Since explosive powder charges lnserted into a firing chamber at the end of a barrel within the housing are well known, the charge and the firing chamber have not been illustrated.
- ~hen the tool 1 is in the ready-to-fire condition, the explosive powder charge is in the effective range of a firing pin actuated by th~ trigger 4. As viewed ln Figure l, the driving direction is the downward direction out of the front end of the housing.
A muzzle part 5 is supported in and projects axially out of the housing in the driving direc-tion. Muzzle part 5 i5 movably displaceable, from the rest or non-firing conditlon of the tool, shown in Figure l, opposite to the firlng direction rearwardly into the housing so that the tool is in the ready-to-fire condition shown in Figure 3.
Uuzzle part 5 has an axially-extending muzzle bore 6 whioh receives a piston 7, shown only in part, ~' 9~i~
which is driven forwardly through the housing into the muzzle bore 6 by the explosive gases generated by the explosive powder charge~ As the piston is propelled forwardly into the muzzle bore it contacts the rear end of a fastening element and drives it forwardly out of the bore into a receiving material.
At the muzzle part 5, a box-shaped maga~nze 8 is secured by one end, at an opening into the muzzle part. The interior of the magazine 8 forms a guide channel or passageway 9 opening into the muzzle bore 6.
As can be seen in Figure 2, the magazine 8 is constructed of a U-shaped main part 11 and a removable L-shaped side wall 12 which closes the open side of the main member 11.
Side wall 12 can be fastened to the main member 11 by a snap-in connection in a known manner.
A compression spring 14, formed of strip material, abuts a rear wall 13 of the main member 11 and the spring contacts a slide 15 and biases the slide in the leftward direction as viewed in Figure l, toward the muzzle bore 6 of the tool l. Slide 15 is guided within the passageway 9 in the magazine 8 by guide strips 16 and 17 on the upper and lower sides of the strip in sliding contact with the inside surfaces of the lower and upper waIls of the passageway 9.
Guide st~ip 17 has a surface 18 facing in the direction toward the housing and forming a stop shoulder 19 moving wlth the slide 15 in the direction feeding fastenlng elements into the muzzle bore 6. A
feed nose 21 projects in the feed direction of the sllde 15~ toward the muæzle bore 6 ahead of the stop ~ ~t7~
shoulder l9. The feed nose 21 bears against a strip or belt of nails or fastening elements 22 inter-connected with one another in a row-like arrangement.
The fastening elements 22 in the strip include a plurality of nails 23 arranged in parallel relation and a guide bushing 24 on each nail formed of a plastics material (note Figure 2~. The opposite axially-spaced ends of the guide bushings 2~ have circular guide rings 25 projecting laterally outwardly from an axially-extending section 26 extending between the guide rings 25. The section 26 is recessed inwardly from the circumferential surfaces of the guide rings 25, forming an annular recess around the guide bushing. A support strip 27 is located on the main member ll extending in the feed direction within the magazine 8, and the strip projects into the annular recess formed in the gaide bushing and retalns the individual nails parallel to the axial direction of the muzzle bore 6.
By pressing the tool l against the receiving ~0 material 28, as shown in Figure 3, the muzzle part 5 moves relative to the houslng 2 so that the front end of the housing 2 is located closer to the surface of the receiving material and the muzzle part 5 moves into the housing. During such~relative movement, (compare Figure l and Figure 3), the front end of the housing extends through a recess 29 formed in the magazine 8, and enters into the passageway 9 within the magazine.
The feed of~the individual nails 23 into the muzzle bore 6 is not obstructed by the relative movemen-t of the nuzzle Dart and the housing. When the muzzle part .:
, , .
-~ ~'799~
5 is displaced rearwardly into the housing, the tool is in the ready-to-fire condition and can be fired by actuating the trigger 4. When the explosive powder charge is ignited, the gases generated propel the piston 7 forwardly through the housing against the nail 23 and bushing 24 located within the muzzle bore 6 and drive the nail into ~he receiving material 28 and at the same time destroy the guide bushing 24. After the piston 7 is returned into the ready-to-fire position, the next fastening element formed by the nail 23 and the bushing 24 enters into the muzzle bore 6.
When the last one of the fastening elements 22 in the strip within the magazine 8 is driven out of the muzæle bore, and the piston 7 is returned into the ready-to-fire position, the slide 15 moves into the muzzle bore 6, that is, the feed nose 21 enters into the muzzle bore in the path of the piston 7. In this end position, stop shoulder 19 is located aligned with the front end face 31 of the housing 2 and the guide strip 17 abuts against a wall portion of the muzzle part 5. If the front end of the tool, that is the front end of the muzzle part 5, is now pressed against the surface of the receiving material 28, the front end face 31 on the housing contacts the stop shoulder 19, after a port1on of the movement of the muzzle part 5 relative to the housing 2 into the ready-to~fire condition, so that the ready-to-fire condition cannot be attained (note~Figure 4). After the magazine 8 is filled with a:new supply of fastening elements 22, wlth the slide 15 returned to its starting position .
9~5~
(note Figure 1), the tool is again ready to commence the driving of the fastening elements into the receiving material.
Having described what is believed to be the best mode by which the invention may be performed, it will be seen that the invention may be particularly defined as follows:
An explosive powder charge operated tool for driving fastening elements such as nails, into a receiving material, comprising a housing having a front end and a rear end and an axial direction extending in the front end rear-end direction, a muzzle part extending in the axial direction and mounted in and extending out of the front end of said housing, said muzzle part having an axially-extending bore therein and being displaceable between a first position into a ready-to-fire posi-tion displaced axially inwardly into said housing from the first position, a magazine mounted in an opening in said muzzle part and extending transversely of the axial ~0 direction outwardly from said:muzzle part, a slide located in said magazine and arranged to feed a strip of fastening elements one at a time into said muzzle part bore, means for displacing said slide through the magazine toward:sald bore into an end position when all of the fastening elements in the strip have been driven from the:muzzle part bore~, wherein the improvement comprises that said slide has a first end leading toward said muzæle part as said strip o~ fastening elements is displaced toward said muzzle part, said housing having an end face at the front end thereof in,alignmen-t with : ; _9_ ~ ~9~5~
said magazine, said first end of said slide has a stop shoulder facing toward and being aligned with said end face of said housing in the end position of said slide and said stop shoulder moving into contact with said end face of said housing in the end position of said slide for preventing movement of said muzzle part relative to said housing whereby said muzzle part cannot be displaced sufficiently into said housing into the ready-to-fire position.
While specific embodiments of the invention have been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims (6)
1. An explosive powder charge operated tool for driving fastening elements such as nails, into a receiving material, comprising a housing having a front end and a rear end and an axial direction extending in the front end rear-end direction, a muzzle part extending in the axial direction and mounted in and extending out of the front end of said housing, said muzzle part having an axially-extending bore therein and being displaceable between a first position into a ready-to-fire position displaced axially inwardly into said housing from the first position, a magazine mounted in an opening in said muzzle part and extending transversely of the axial direction outwardly from said muzzle part, a slide located in said magazine and arranged to feed a strip of fastening elements one at a time into said muzzle part bore, means for displacing said slide through the magazine toward said bore into an end position when all of the fastening elements in the strip have been driven from the muzzle part bore, wherein the improvement comprises that said slide has a first end leading toward said muzzle part as said strip of fastening elements is displaced toward said muzzle part, said housing having an end face at the front end thereof in alignment with said magazine, said first end of said slide has a stop shoulder facing toward and being aligned with said end face of said housing in the end position of said slide and said stop shoulder moving into contact with said end face of said housing in the end position of said slide for preventing movement of said muzzle part relative to said housing whereby said muzzle part cannot be displaced sufficiently into said housing into the ready-to-fire position.
2. An explosive powder charge operated tool, as set forth in Claim 1, wherein said stop shoulder is formed by a surface of a guide strip on said slide facing toward said housing.
3. An explosive powder charge operated tool, as set forth in Claim 2, wherein said magazine has an opening therein adjacent to said muzzle part so that said end face at the front end of said housing can move inwardly into said magazine into contact with said stop shoulder.
4. An explosive powder charge operated tool, as set forth in Claim 3, wherein said slide has a feed nose arranged to bear against the strip of fastening elements with said feed nose projecting out-wardly from said stop shoulder in the direction of movement of the slide toward said muzzle part.
5. An explosive powder charge operated tool, as set forth in Claim 1, wherein spring means within said magazine bias said slide in the direction toward said muzzle part into the end position thereof.
6. An explosive powder charge operated tool, as set forth in Claim 1, wherein means are provided within said magazine for guiding said strip of fastening elements toward said muzzle part for maintaining said fastening elements in parallel relation with the axis of said muzzle part bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000531801A CA1279952C (en) | 1986-03-12 | 1987-03-11 | Explosive charge operated tool for fastening elements |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3608146.9 | 1986-03-12 | ||
| CA000531801A CA1279952C (en) | 1986-03-12 | 1987-03-11 | Explosive charge operated tool for fastening elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279952C true CA1279952C (en) | 1991-02-12 |
Family
ID=4135154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000531801A Expired - Fee Related CA1279952C (en) | 1986-03-12 | 1987-03-11 | Explosive charge operated tool for fastening elements |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1279952C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4424471A1 (en) * | 2023-02-28 | 2024-09-04 | Techtronic Cordless GP | Stapler lockout |
-
1987
- 1987-03-11 CA CA000531801A patent/CA1279952C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4424471A1 (en) * | 2023-02-28 | 2024-09-04 | Techtronic Cordless GP | Stapler lockout |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |