CA1050003A - Telescopic jack post cross pin - Google Patents
Telescopic jack post cross pinInfo
- Publication number
- CA1050003A CA1050003A CA251,024A CA251024A CA1050003A CA 1050003 A CA1050003 A CA 1050003A CA 251024 A CA251024 A CA 251024A CA 1050003 A CA1050003 A CA 1050003A
- Authority
- CA
- Canada
- Prior art keywords
- cross
- pin
- portions
- section
- transverse
- 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
Links
- 239000000543 intermediate Substances 0.000 claims 8
- 239000002184 metal Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000009435 building construction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In a jack-post, the use of a cylindrical metal cross-pin with transverse key slots cut therein is well known.
The use of a cross-pin with segmental shoulders stamped into the ends thereof results in a cross-pin with an integral key which requires less material than known cross-pins and which requires no cutting and resultant material wastage.
In a jack-post, the use of a cylindrical metal cross-pin with transverse key slots cut therein is well known.
The use of a cross-pin with segmental shoulders stamped into the ends thereof results in a cross-pin with an integral key which requires less material than known cross-pins and which requires no cutting and resultant material wastage.
Description
~ his in~ention relates to a cross-pin for use in combination with an adjusta~le jac~-post, such as is used in the building construction industry for support of beams.
Jack-posts are well known in the construction industry and such conventional posts employ a ~ertical member with a horizontal base portion at one end and a horizontal cap -portion at the other end. The vertical member of conventional ~ ~
jack-posts comprises inner and outer hollow telescoping metal ~ -cylinders, a fine adjustment threaded screw portion connecting the top of the inner telescopic member to the cap portion, and a cross-pin member which is passed through one of a series of diametrically opposite transverse holes in the inner telescopic member and which rests upon the upper edge of the outer telescopic member, to provide a coarse adjustment means for the jac~-post.
Cross-pin members of the type known in the industry are commonly of a cylindrical shape with two transverse slots cut in them to a depth approximating one-half the diameter of the cylinder, the slots being spaced apart a distance approximately i~, ..... .. .
equal to the diameter of the outer telescopic member, which slots fit over the upper edge of s~ d outer telescopic member, and serve as a key means to pre~ent the cross-pin from being remo~ed from the erected jack-post. To form such a cross-pin member, it is neces-sary to machine cut the slots, which is a relatively expensive process and one which i~ wasteful of the material from which the pin is formed.
, .
This i~vention provides an elongated cross-pin having three por~ions along its length, said three portions haYing a common planar base, the first portion including one end of the cross-pin and being shaped generally as a segment of a circle - :
~ in transverse cross-section, the second portion being generally :: .
~ . .:
q~ .
- 1 - ~- ~:
. ' . ' .
10501~03 rectangular in transverse cross-section and the third pDrtion including the other end o~ the cross-pin and being shaped generally as a segment of a circle in transverse cross-section, the arc of each of said segments subtending an angle of less than 180, and said second portion extending a greater distance from said base for a portion of its width than said first or third portions.
A further embodiment of the invention provides an elongated cross-pin having three intermediate portions between end portions at the axial extremuties of the cross-pin, said end portions adjoining first and third intermediate portions respectively wherein the base of each end portion projects radially outwardly from the co~mon planar base of its adjoining portion.
The invention will appear more fully in the course of the following description. Referring now to the drawings which illustrate an embodiment of the in~ention, in which like re~erence numbers designate similar parts in the several views, FIGURE l is an elevation partially in section of a conventional jack-post showing the cross-pin o~ one embodiment of the invention;
FIGURE 2 is the transYerse elevation of a portion of the jack-post shown in Figure 1;
FIGURE 3 is an enlargement of the cross-pin shown in Figure l;
FIGURE 4 is a cross-section of the cross-pin shown in Figure 3, with the periphery of a transverse aperture of the inner telescopic member shown in phantom;
FIGURE 5 is an elevation partially in section of a portion of a conventional jack-post showing tha cross-pin of a further e~bodime~t of the invention;
~IGURB 6 is the transverse elevation of the portion of the jack-post shown in Figure 5;
FIGURE 7 is an enlargement of the cross-pin shown -in Figure 5; and
Jack-posts are well known in the construction industry and such conventional posts employ a ~ertical member with a horizontal base portion at one end and a horizontal cap -portion at the other end. The vertical member of conventional ~ ~
jack-posts comprises inner and outer hollow telescoping metal ~ -cylinders, a fine adjustment threaded screw portion connecting the top of the inner telescopic member to the cap portion, and a cross-pin member which is passed through one of a series of diametrically opposite transverse holes in the inner telescopic member and which rests upon the upper edge of the outer telescopic member, to provide a coarse adjustment means for the jac~-post.
Cross-pin members of the type known in the industry are commonly of a cylindrical shape with two transverse slots cut in them to a depth approximating one-half the diameter of the cylinder, the slots being spaced apart a distance approximately i~, ..... .. .
equal to the diameter of the outer telescopic member, which slots fit over the upper edge of s~ d outer telescopic member, and serve as a key means to pre~ent the cross-pin from being remo~ed from the erected jack-post. To form such a cross-pin member, it is neces-sary to machine cut the slots, which is a relatively expensive process and one which i~ wasteful of the material from which the pin is formed.
, .
This i~vention provides an elongated cross-pin having three por~ions along its length, said three portions haYing a common planar base, the first portion including one end of the cross-pin and being shaped generally as a segment of a circle - :
~ in transverse cross-section, the second portion being generally :: .
~ . .:
q~ .
- 1 - ~- ~:
. ' . ' .
10501~03 rectangular in transverse cross-section and the third pDrtion including the other end o~ the cross-pin and being shaped generally as a segment of a circle in transverse cross-section, the arc of each of said segments subtending an angle of less than 180, and said second portion extending a greater distance from said base for a portion of its width than said first or third portions.
A further embodiment of the invention provides an elongated cross-pin having three intermediate portions between end portions at the axial extremuties of the cross-pin, said end portions adjoining first and third intermediate portions respectively wherein the base of each end portion projects radially outwardly from the co~mon planar base of its adjoining portion.
The invention will appear more fully in the course of the following description. Referring now to the drawings which illustrate an embodiment of the in~ention, in which like re~erence numbers designate similar parts in the several views, FIGURE l is an elevation partially in section of a conventional jack-post showing the cross-pin o~ one embodiment of the invention;
FIGURE 2 is the transYerse elevation of a portion of the jack-post shown in Figure 1;
FIGURE 3 is an enlargement of the cross-pin shown in Figure l;
FIGURE 4 is a cross-section of the cross-pin shown in Figure 3, with the periphery of a transverse aperture of the inner telescopic member shown in phantom;
FIGURE 5 is an elevation partially in section of a portion of a conventional jack-post showing tha cross-pin of a further e~bodime~t of the invention;
~IGURB 6 is the transverse elevation of the portion of the jack-post shown in Figure 5;
FIGURE 7 is an enlargement of the cross-pin shown -in Figure 5; and
- 2 -~050~D03 FIGURE 8 is a cross-section of the cross-pin shown in Figure 5, with the periphery of the transverse aperture :
of the inner telescopic member shown in phantom.
As may best be seen in ~igure 1, a jack-post -commonly comprises an outer hollow cylindrical member 1, an .. .
inner hollow cylindrical member 2 which telescopes within outer member 1, a base member 3, a cap plate mem~er 4, a fine adjust-ment threaded member 5 connecting the top of inner telescoping member 2 and the cap plate 4 and a cross-pin 6 which passes .
through diametrically opp~site transverse apertures 7 in the : :
inner telescopic member 2 to provide a coarse height adjustment.
'' ' ' ""
The cross-pin of one embodiment of this invention is formed from a suitable.length of rectangular metal bar stock, ~. .. ...
the length of the cross-pin being sufficiently long~r than the diameter of the.outer telescopic member 1 t~ provide proper bearing.surfaces between cross-pin and outer telescopic member 1.
The rectangular metal bar stock from which the cross-pin 6 is formed has a cross-section o~ suitable dimension in order to permit the cross-pin to pass through the transverse apertures 7 of the inner.telescopic member ~ as may best be seen in Figure 4. Referring to Figure 3,.by means of.a process involving the.use.of a die and press or other suitable process which will be evident to.one skilled in the art, each end of ~he cross-pin 6 is formed into an end portion 8 with an end face 9 of segmental cross-sectio~.o~ each end of the cross-pin, the central ~.
portion 10 of the.cross~pin remaining rectangular in cross- .. .: -section, thus forming a face 11 where the end portion 8 and the ~.
intermediate portion.10 join. The distance between the two faces 11 is slightly less than the internal diameter of the .
inner telescopic.member.2 with which the pin is to be used.
In use, the cross-pin is inserted into the selected transverse ~ .
apertures 7. When the jacX-post is erected, the bottom surface
of the inner telescopic member shown in phantom.
As may best be seen in ~igure 1, a jack-post -commonly comprises an outer hollow cylindrical member 1, an .. .
inner hollow cylindrical member 2 which telescopes within outer member 1, a base member 3, a cap plate mem~er 4, a fine adjust-ment threaded member 5 connecting the top of inner telescoping member 2 and the cap plate 4 and a cross-pin 6 which passes .
through diametrically opp~site transverse apertures 7 in the : :
inner telescopic member 2 to provide a coarse height adjustment.
'' ' ' ""
The cross-pin of one embodiment of this invention is formed from a suitable.length of rectangular metal bar stock, ~. .. ...
the length of the cross-pin being sufficiently long~r than the diameter of the.outer telescopic member 1 t~ provide proper bearing.surfaces between cross-pin and outer telescopic member 1.
The rectangular metal bar stock from which the cross-pin 6 is formed has a cross-section o~ suitable dimension in order to permit the cross-pin to pass through the transverse apertures 7 of the inner.telescopic member ~ as may best be seen in Figure 4. Referring to Figure 3,.by means of.a process involving the.use.of a die and press or other suitable process which will be evident to.one skilled in the art, each end of ~he cross-pin 6 is formed into an end portion 8 with an end face 9 of segmental cross-sectio~.o~ each end of the cross-pin, the central ~.
portion 10 of the.cross~pin remaining rectangular in cross- .. .: -section, thus forming a face 11 where the end portion 8 and the ~.
intermediate portion.10 join. The distance between the two faces 11 is slightly less than the internal diameter of the .
inner telescopic.member.2 with which the pin is to be used.
In use, the cross-pin is inserted into the selected transverse ~ .
apertures 7. When the jacX-post is erected, the bottom surface
- 3-' -: -~
~(~50003 12 of the cross-pin rests on the upper edge 13 of the outer telescopic member 1, the peripheries of the selected transverse apertures 7 contact the surfaces o~ end portions 8 of the cross-pin 6, ana the central portion 10 of the cross-pin 6 extends upwardly within inner telescopic member 2. Thus, as may be seen from Figure 1, faces 11 prevent the cross-pin 6 from being removed from the erected jack-post.
The rectangular shape o the central portion 10 of the cross-pin 6 is sized to fit into the diametrically opposed transverse apertures 7 in the inner telescopic member 2. It will therefore be apparent that the segmental cross-section of end portions 8 will be somewhat less than a semi-circle. The radius of the segmental cross-section of end portion 8, however, should be only slightly less than the radius o~ the apertures 7.
Referring now to Figures 5 through 8 in which like parts to.those shown in Figures 1 through 4 bear the same numeric designation, a further embodiment of the invention is illustrated. The cross-pin 6' of ~igures 7 and 8 is sim~lar to the cross-pin illustrated in Figures 3 and 4, but in addition contains a flange portion on each end of the cross-pin. Like the cross-pin illustrated in Figures 3 and 4, the cross-pin 6' illustrated in Figures 7 and 8 has a central rectangular portion 10 and intermediote portions 8' of segmental cross-section. In addition, there is-disposed at either end of the cross-pin 6' a -flange portion 14, which is also of segmental cross-section.
Flange portions 14 are formed by means of a process involving the use of a die and press or ~ther suitable process which will be evident to one skilled in the art, whereby the extremities of -a cross-pin, such as illustrated in Figures 3 and 4 are sheared downwards-relative to the cross-pin itselft thereby forming edges lS which will depend below the upper edge 13 of the outer telescopic member l when the cross-pin is positioned in the ~;
~(~50003 12 of the cross-pin rests on the upper edge 13 of the outer telescopic member 1, the peripheries of the selected transverse apertures 7 contact the surfaces o~ end portions 8 of the cross-pin 6, ana the central portion 10 of the cross-pin 6 extends upwardly within inner telescopic member 2. Thus, as may be seen from Figure 1, faces 11 prevent the cross-pin 6 from being removed from the erected jack-post.
The rectangular shape o the central portion 10 of the cross-pin 6 is sized to fit into the diametrically opposed transverse apertures 7 in the inner telescopic member 2. It will therefore be apparent that the segmental cross-section of end portions 8 will be somewhat less than a semi-circle. The radius of the segmental cross-section of end portion 8, however, should be only slightly less than the radius o~ the apertures 7.
Referring now to Figures 5 through 8 in which like parts to.those shown in Figures 1 through 4 bear the same numeric designation, a further embodiment of the invention is illustrated. The cross-pin 6' of ~igures 7 and 8 is sim~lar to the cross-pin illustrated in Figures 3 and 4, but in addition contains a flange portion on each end of the cross-pin. Like the cross-pin illustrated in Figures 3 and 4, the cross-pin 6' illustrated in Figures 7 and 8 has a central rectangular portion 10 and intermediote portions 8' of segmental cross-section. In addition, there is-disposed at either end of the cross-pin 6' a -flange portion 14, which is also of segmental cross-section.
Flange portions 14 are formed by means of a process involving the use of a die and press or ~ther suitable process which will be evident to one skilled in the art, whereby the extremities of -a cross-pin, such as illustrated in Figures 3 and 4 are sheared downwards-relative to the cross-pin itselft thereby forming edges lS which will depend below the upper edge 13 of the outer telescopic member l when the cross-pin is positioned in the ~;
- 4 -' ' ', ; ,, . . , . . .. . , :
10500~3 erected jack-post. The flange portion 14 may be sheared downwardly relative to segmental.intermediate portion 8' by a displacement up to one-third of the vertical dimension H of the intermediate portion 8'.
The distance between edges 15 of depending flanges 14 is selected to be slightly greater than the outside dimension of outer telescopic member 1. Thus, when the jack-post is erected, the bottom surface 12' o~ the cross-pin rests on the upper edge 13 of the outer telescopic member 1, the peripheries of the transverse apertures 7 contact the curved sur~aces of the intermediate portions 8', the central portion 10' of the cross-pin 6' extends upwardly within inner telescopic member 2, and flanges 14 depend below and bracket the upper edge 13 of outer telescopic member 1. Thus, not only do the flanges 14 assist in preventing the.cross-pin 6' ~rom being removed.from the erected jack-post, but also they restrain the upper edge 13 of outer telescopic member 1 from being displaced radially outwardly when the jack-post is subjected to extreme compression, there~y in- . .
creasing the ultimate strength of the column.
. 20 While the foregoing has illustrated and described :: .
several embodiments of the inv~ntion, other embodiments may be . .
~. made without departing from the spirit and scope of the invention.
:~ Metal bar stock of other than rectangular cross-section may be .
employed, and the portion 10 of the cross-pin may be stamped to ~ :.
provide a curved upper.surface if desired. Therefore, it is not ~ .
: desired to.rastrict the invention to.the particular formssof :: :
. .
constru¢tion illustrated and described but to.cover all . modifications that may fall within the scope of the appended claim~
... ~
:~: , ,.
~ 5 ~
,
10500~3 erected jack-post. The flange portion 14 may be sheared downwardly relative to segmental.intermediate portion 8' by a displacement up to one-third of the vertical dimension H of the intermediate portion 8'.
The distance between edges 15 of depending flanges 14 is selected to be slightly greater than the outside dimension of outer telescopic member 1. Thus, when the jack-post is erected, the bottom surface 12' o~ the cross-pin rests on the upper edge 13 of the outer telescopic member 1, the peripheries of the transverse apertures 7 contact the curved sur~aces of the intermediate portions 8', the central portion 10' of the cross-pin 6' extends upwardly within inner telescopic member 2, and flanges 14 depend below and bracket the upper edge 13 of outer telescopic member 1. Thus, not only do the flanges 14 assist in preventing the.cross-pin 6' ~rom being removed.from the erected jack-post, but also they restrain the upper edge 13 of outer telescopic member 1 from being displaced radially outwardly when the jack-post is subjected to extreme compression, there~y in- . .
creasing the ultimate strength of the column.
. 20 While the foregoing has illustrated and described :: .
several embodiments of the inv~ntion, other embodiments may be . .
~. made without departing from the spirit and scope of the invention.
:~ Metal bar stock of other than rectangular cross-section may be .
employed, and the portion 10 of the cross-pin may be stamped to ~ :.
provide a curved upper.surface if desired. Therefore, it is not ~ .
: desired to.rastrict the invention to.the particular formssof :: :
. .
constru¢tion illustrated and described but to.cover all . modifications that may fall within the scope of the appended claim~
... ~
:~: , ,.
~ 5 ~
,
Claims (10)
1. An elongated cross-pin having three portions along its length, said three portions having a common planar base, the first portion including one end of the cross-pin and being shaped generally as a segment of a circle in transverse cross-section, the second portion being generally rectangular in trans-verse cross-section and the third portion including the other end of the cross-pin and being shaped generally as a segment of a circle in transverse cross-section, the arc of each of said segments subtending an angle of less than 180°, and said second portion extending a greater distance from said base for a portion of its width than said first or third portions.
2. The elongated cross-pin as defined in claim 1 wherein the angle subtended by the arc of each of the segments is obtuse.
3. The elongated cross-pin as defined in claim 2 wherein the joinders between the second portion and each of the first and third portions form radially outwardly projecting shoulders.
4. The elongated cross-pin as defined in claims 2 and 3 wherein the first and third portions are of equal dimensions.
5. An elongated cross-pin for use in association with a jack-post assembly having an inner and an outer telescopic cylindrical member with a series of vertically separated, diametri-cally opposite transverse circular holes in one of the telescopic members through which the cross-pin can be inserted, wherein the cross-pin has three portions along its length, said three portions having a common planar base, the first portion including one end of the cross-pin and being shaped generally as a segment of a circle in transverse cross-section, the second portion being generally rectangular in transverse cross-section and the third portion including the other end of the cross-pin and being shaped generally as a segment of a circle in transverse cross-section; the arc of each of said segments subtending an angle of less than 180°, and said second portion extending a greater distance from said base for a portion of its width than said first or third portions.
6. The elongated cross-pin as defined in claim 5 wherein the angle subtended by the arc of each of the segments is obtuse.
7. The elongated cross-pin as defined in claim 6 wherein the joinders between the second portion and each of the first and third portions form radially outwardly projecting shoulders.
8. The elongated cross-pin as defined in claims 5 and 6 wherein the first and third portions are of equal dimensions.
9. An elongated cross-pin having three intermediate portions along its length, said three intermediate portions having a common planar base, the first intermediate portion being shaped generally as a segment of a circle in transverse cross-section, the second intermediate portion being generally rectangular in transverse cross-section and the third intermediate portion being shaped generally as a segment of a circle in transverse cross-section, the arc of each of said segments subtending an angle of less than 180°, and said second intermediate portion extending a greater distance from said base than said first or third inter-mediate portions, said cross-pin further including end portions at the axial extremeties thereof, said end portions adjoining said first and third intermediate portions respectively and the base of each end portion projecting radially outwardly from the common planar base of its adjoining portion.
10. The elongated cross-pin as defined in claim 9 wherein each end portion is of the same cross-section as its respective adjoining portion and wherein the joinder between each end portion and its respective adjoining portion forms a shoulder means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA251,024A CA1050003A (en) | 1976-04-26 | 1976-04-26 | Telescopic jack post cross pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA251,024A CA1050003A (en) | 1976-04-26 | 1976-04-26 | Telescopic jack post cross pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050003A true CA1050003A (en) | 1979-03-06 |
Family
ID=4105780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA251,024A Expired CA1050003A (en) | 1976-04-26 | 1976-04-26 | Telescopic jack post cross pin |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1050003A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4889357A (en) * | 1988-05-31 | 1989-12-26 | Perry John C | Parking stand for supporting the tongue of a parked trailer |
| FR2991428A1 (en) * | 2012-06-01 | 2013-12-06 | Airbus Operations Sas | DEVICE AND METHOD FOR SUPPLYING TWO CONNECTIONS AT THE END OF TWO CONDUITS, IN PARTICULAR IN AN AIRCRAFT |
-
1976
- 1976-04-26 CA CA251,024A patent/CA1050003A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4889357A (en) * | 1988-05-31 | 1989-12-26 | Perry John C | Parking stand for supporting the tongue of a parked trailer |
| FR2991428A1 (en) * | 2012-06-01 | 2013-12-06 | Airbus Operations Sas | DEVICE AND METHOD FOR SUPPLYING TWO CONNECTIONS AT THE END OF TWO CONDUITS, IN PARTICULAR IN AN AIRCRAFT |
| US9791070B2 (en) | 2012-06-01 | 2017-10-17 | Airbus Operations (S.A.S.) | Device and method for fitting two connections at the end of two conduits, in particular in an aircraft |
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