US20070227021A1 - Plumb bob with adjustable weights - Google Patents
Plumb bob with adjustable weights Download PDFInfo
- Publication number
- US20070227021A1 US20070227021A1 US11/398,394 US39839406A US2007227021A1 US 20070227021 A1 US20070227021 A1 US 20070227021A1 US 39839406 A US39839406 A US 39839406A US 2007227021 A1 US2007227021 A1 US 2007227021A1
- Authority
- US
- United States
- Prior art keywords
- shank
- weight elements
- plumb bob
- threaded section
- point
- 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.)
- Granted
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/10—Plumb lines
Definitions
- the present invention relates to plumbing devices and more particularly to a plumb bob having adjustable weights so as to suit different applications.
- a plumb bob 1 is shown in FIG. 1 and comprises an integral, conic weight and a string affixed thereto. Conventionally, the weight is made either by shaping an integral metal piece or by an injection molding process.
- a plumb bob comprising a bottom point; a shank extended upward from the point and having a lower portion and an upper threaded section; a plurality of hollow first weight elements adapted to put on the lower portion of the shank and rested upon a top of the point; a plurality of hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder; a hollow projecting knob including an axial bore having lower threads and a top shoulder; and a string including a bottom knot engaged with and stopped at the shoulder; wherein the bore of the knob is adapted to threadedly secure to the remaining portion of the threaded section of the shank.
- It is another object of the present invention to provide a plumb bob comprising a bottom point; a shank extended upward from the point and including a lower portion and an upper threaded section having a transverse hole formed through its upper portion; a plurality of hollow first weight elements adapted to put on the lower portion of the shank and rested upon a top of the point; a plurality of hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder; a nut threadedly secured to the remaining portion of the threaded section of the shank; and a string including a bottom knot formed on a top of the threaded section of the shank by looping a lower end of the string around the hole of the shank.
- each of the first and second weight elements is a disc-shaped member having a central circular bore.
- each of the first and second weight elements is a square member having a central square bore.
- each of the first and second weight elements is a triangular member having a central square bore.
- FIG. 1 is a perspective view of a conventional plumb bob
- FIG. 2 is a perspective view of a first preferred embodiment of plumb bob according to the invention.
- FIG. 3 is an exploded view of the plumb bob in FIG. 2 ;
- FIG. 4 is an elevation view of the plumb bob in FIG. 2 ;
- FIG. 5 is a sectional view of the plumb bob in FIG. 2 ;
- FIG. 6 is a perspective view of four plumb bobs according to the first preferred embodiment of the invention having different weights formed by assembling;
- FIG. 7 is a sectional view of a second preferred embodiment of plumb bob according to the invention.
- FIGS. 8 and 9 are perspective views of two different configurations of weight element in either embodiment.
- a plumb bob in accordance with a first preferred embodiment of the invention comprises a collar 10 including a lower conic member 12 , a point 11 at a bottom of the conic member 12 , a shank 13 extended upward from the conic member 12 , and a threaded section 14 on an upper portion of the shank 13 ; and a plurality of disc-shaped, hollow weight elements 20 having threads on its central bore 21 dimensioned and shaped to fit snugly on the shank 13 .
- the plumb bob further comprises a hollow, cylindrical cap 50 including an upper axial bore 51 , a lower threaded inner surface 53 , and a conic inner surface 52 interconnecting the bore 51 and the threaded inner surface 53 ; a circular stop 40 including an axial hole 41 and a conic upper surface 42 ; and a string 30 including a bottom knot 31 .
- a person may select a desired number of weight elements 20 to put on a selected collar 10 of a specific height so as to form one of a number of different plumb bobs having different weights for being adapted to different applications.
- FIG. 7 a second preferred embodiment of plumb bob according to the invention is shown.
- the second embodiment is identical to the first embodiment, except that the threaded section 14 is longer, a transverse hole 15 is formed through an upper portion of the threaded section 14 such that a knot may be formed on a top of the threaded section 14 by looping the string 30 around the hole 15 , and the cap 50 is replaced by a nut 60 .
- the nut 60 is threadedly secured to an upper portion of the threaded section 14 and the remaining portion of the threaded section 14 is threadedly secure to more number of the weight elements 20 .
- the weight element 70 is a square member having a central square bore 71 .
- the weight element 80 is a triangular member having a central square bore 81 .
Abstract
A plumb bob with adjustable weights for suiting different applications is disclosed that includes, in one embodiment, a bottom point; a shank extended upward from the point and having a lower portion and an upper threaded section; hollow first weight elements adapted to put on the lower portion of the shank and rested upon the point; hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder; a hollow projecting knob including an axial bore having lower threads and a top shoulder; and a string including a bottom knot engaged with and stopped at the shoulder. The knob is adapted to threadedly secure to the remaining portion of the threaded section of the shank.
Description
- 1. Field of Invention
- The present invention relates to plumbing devices and more particularly to a plumb bob having adjustable weights so as to suit different applications.
- 2. Related Art
- The establishment of a vertical reference above a datum for a construction worker to transfer a datum from one level to another is an everyday requirement in the construction field. One of the most common tools to accomplish the function is a plumb bob. A
conventional plumb bob 1 is shown inFIG. 1 and comprises an integral, conic weight and a string affixed thereto. Conventionally, the weight is made either by shaping an integral metal piece or by an injection molding process. - However, each of the prior techniques suffered from one or more disadvantages. For the former, material waste is inevitable. For both, weight mass is fixed. Thus, the prior plumb bob is not adapted to different applications by adjusting its weight. Hence, the need for improvement still exists.
- It is therefore an object of the present invention to provide a plumb bob comprising a bottom point; a shank extended upward from the point and having a lower portion and an upper threaded section; a plurality of hollow first weight elements adapted to put on the lower portion of the shank and rested upon a top of the point; a plurality of hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder; a hollow projecting knob including an axial bore having lower threads and a top shoulder; and a string including a bottom knot engaged with and stopped at the shoulder; wherein the bore of the knob is adapted to threadedly secure to the remaining portion of the threaded section of the shank.
- It is another object of the present invention to provide a plumb bob comprising a bottom point; a shank extended upward from the point and including a lower portion and an upper threaded section having a transverse hole formed through its upper portion; a plurality of hollow first weight elements adapted to put on the lower portion of the shank and rested upon a top of the point; a plurality of hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder; a nut threadedly secured to the remaining portion of the threaded section of the shank; and a string including a bottom knot formed on a top of the threaded section of the shank by looping a lower end of the string around the hole of the shank.
- In one aspect of the present invention each of the first and second weight elements is a disc-shaped member having a central circular bore.
- In another aspect of the present invention each of the first and second weight elements is a square member having a central square bore.
- In a further aspect of the present invention each of the first and second weight elements is a triangular member having a central square bore.
- The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
-
FIG. 1 is a perspective view of a conventional plumb bob; -
FIG. 2 is a perspective view of a first preferred embodiment of plumb bob according to the invention; -
FIG. 3 is an exploded view of the plumb bob inFIG. 2 ; -
FIG. 4 is an elevation view of the plumb bob inFIG. 2 ; -
FIG. 5 is a sectional view of the plumb bob inFIG. 2 ; -
FIG. 6 is a perspective view of four plumb bobs according to the first preferred embodiment of the invention having different weights formed by assembling; -
FIG. 7 is a sectional view of a second preferred embodiment of plumb bob according to the invention; and -
FIGS. 8 and 9 are perspective views of two different configurations of weight element in either embodiment. - Referring to FIGS. 2 to 6, a plumb bob in accordance with a first preferred embodiment of the invention comprises a
collar 10 including alower conic member 12, apoint 11 at a bottom of theconic member 12, ashank 13 extended upward from theconic member 12, and a threadedsection 14 on an upper portion of theshank 13; and a plurality of disc-shaped,hollow weight elements 20 having threads on itscentral bore 21 dimensioned and shaped to fit snugly on theshank 13. - The plumb bob further comprises a hollow,
cylindrical cap 50 including an upperaxial bore 51, a lower threadedinner surface 53, and a conicinner surface 52 interconnecting thebore 51 and the threadedinner surface 53; acircular stop 40 including anaxial hole 41 and a conicupper surface 42; and astring 30 including abottom knot 31. - An assembly operation of the invention will be described in detailed below. First, insert the
shank 13 of thecollar 10 into thebores 21 of a selected number of theweight elements 20 until theweight elements 20 are rested on theconic member 12. Next, put a number of theweight elements 20 on theshank 13 and threadedly secure same to a lower portion of the threadedsection 14. As such, theweight elements 20 and thecollar 10 are fastened together. Next, pass a top of thestring 30 through thehole 41 and thebore 51 to attach theknot 31 to a bottom of thestop 40 with thestop 40 matingly engaged with the conicinner surface 52. Next, threadedly secure the threadedinner surface 53 of thecap 50 to the remaining upper portion of the threadedsection 14 of thecollar 10. As an end, a complete plumb bob is formed. - As shown in
FIG. 6 , a person may select a desired number ofweight elements 20 to put on aselected collar 10 of a specific height so as to form one of a number of different plumb bobs having different weights for being adapted to different applications. - Referring to
FIG. 7 , a second preferred embodiment of plumb bob according to the invention is shown. The second embodiment is identical to the first embodiment, except that the threadedsection 14 is longer, atransverse hole 15 is formed through an upper portion of the threadedsection 14 such that a knot may be formed on a top of the threadedsection 14 by looping thestring 30 around thehole 15, and thecap 50 is replaced by anut 60. Thus, thenut 60 is threadedly secured to an upper portion of the threadedsection 14 and the remaining portion of the threadedsection 14 is threadedly secure to more number of theweight elements 20. - Referring to
FIGS. 8 and 9 , two different configurations of weight element in either embodiment are shown. InFIG. 8 , theweight element 70 is a square member having acentral square bore 71. InFIG. 9 , theweight element 80 is a triangular member having acentral square bore 81. - While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.
Claims (8)
1. A plumb bob comprising:
a bottom point;
a shank extended upward from the point and having a lower portion and an upper threaded section;
a plurality of hollow first weight elements adapted to put on the lower portion of the shank and rested upon a top of the point;
a plurality of hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder;
a hollow projecting knob including an axial bore having lower threads and a top shoulder; and
a string including a bottom knot engaged with and stopped at the shoulder;
wherein the bore of the knob is adapted to threadedly secure to the remaining portion of the threaded section of the shank.
2. The plumb bob of claim 1 , wherein each of the first and second weight elements is a disc-shaped member having a central circular bore.
3. The plumb bob of claim 1 , wherein each of the first and second weight elements is a square member having a central square bore.
4. The plumb bob of claim 1 , wherein each of the first and second weight elements is a triangular member having a central square bore.
5. A plumb bob comprising:
a bottom point;
a shank extended upward from the point and including a lower portion and an upper threaded section having a transverse hole formed through its upper portion;
a plurality of hollow first weight elements adapted to put on the lower portion of the shank and rested upon a top of the point;
a plurality of hollow second weight elements having an axial threaded hole and being adapted to put on a portion of the threaded section of the shank to threadedly secure thereto with the first weight elements being fastened thereunder;
a nut threadedly secured to the remaining portion of the threaded section of the shank; and
a string including a bottom knot formed on a top of the threaded section of the shank by looping a lower end of the string around the hole of the shank.
6. The plumb bob of claim 5 , wherein each of the first and second weight elements is a disc-shaped member having a central circular bore.
7. The plumb bob of claim 5 , wherein each of the first and second weight elements is a square member having a central square bore.
8. The plumb bob of claim 5 , wherein each of the first and second weight elements is a triangular member having a central square bore.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/398,394 US7278220B1 (en) | 2006-04-04 | 2006-04-04 | Plumb bob with adjustable weights |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/398,394 US7278220B1 (en) | 2006-04-04 | 2006-04-04 | Plumb bob with adjustable weights |
Publications (2)
Publication Number | Publication Date |
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US20070227021A1 true US20070227021A1 (en) | 2007-10-04 |
US7278220B1 US7278220B1 (en) | 2007-10-09 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/398,394 Expired - Fee Related US7278220B1 (en) | 2006-04-04 | 2006-04-04 | Plumb bob with adjustable weights |
Country Status (1)
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US (1) | US7278220B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102601586A (en) * | 2012-03-22 | 2012-07-25 | 陈德友 | Method for processing plumb bob |
FR3029282A3 (en) * | 2014-11-27 | 2016-06-03 | Inno-B | LEAD WIRE COMPRISING A BODY WHICH IS SUBJECT TO THE EXTENDING OF A WIRE |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005097666A1 (en) * | 2004-03-31 | 2005-10-20 | Ch & I Technologies, Inc. | Refillable material transfer system |
US20100095540A1 (en) * | 2008-10-16 | 2010-04-22 | Samuel Berkman | Construction hole alignment devices and methods therefor |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US485376A (en) * | 1892-11-01 | Plumb-bob | ||
US1025828A (en) * | 1911-05-16 | 1912-05-07 | John Paul | Plumb-bob. |
US2492884A (en) * | 1947-03-06 | 1949-12-27 | Otto A Patermaster | Plumb bob |
US3405450A (en) * | 1966-07-18 | 1968-10-15 | Reginald T. Peacock | Plumb bob |
US3448525A (en) * | 1967-08-03 | 1969-06-10 | Mieczyslaw Stanislaw Majewski | Plumb bob and straight-edge with interchangeable parts |
US3720001A (en) * | 1970-05-04 | 1973-03-13 | M Majewski | Plumb bob with interchangeable parts |
US20060242852A1 (en) * | 2005-04-27 | 2006-11-02 | Ching-Yi Lin | Construction-use plumb bob structure |
-
2006
- 2006-04-04 US US11/398,394 patent/US7278220B1/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US485376A (en) * | 1892-11-01 | Plumb-bob | ||
US1025828A (en) * | 1911-05-16 | 1912-05-07 | John Paul | Plumb-bob. |
US2492884A (en) * | 1947-03-06 | 1949-12-27 | Otto A Patermaster | Plumb bob |
US3405450A (en) * | 1966-07-18 | 1968-10-15 | Reginald T. Peacock | Plumb bob |
US3448525A (en) * | 1967-08-03 | 1969-06-10 | Mieczyslaw Stanislaw Majewski | Plumb bob and straight-edge with interchangeable parts |
US3720001A (en) * | 1970-05-04 | 1973-03-13 | M Majewski | Plumb bob with interchangeable parts |
US20060242852A1 (en) * | 2005-04-27 | 2006-11-02 | Ching-Yi Lin | Construction-use plumb bob structure |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102601586A (en) * | 2012-03-22 | 2012-07-25 | 陈德友 | Method for processing plumb bob |
FR3029282A3 (en) * | 2014-11-27 | 2016-06-03 | Inno-B | LEAD WIRE COMPRISING A BODY WHICH IS SUBJECT TO THE EXTENDING OF A WIRE |
Also Published As
Publication number | Publication date |
---|---|
US7278220B1 (en) | 2007-10-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20111009 |