US20110119853A1

US20110119853A1 - Scraper

Info

Publication number: US20110119853A1
Application number: US12/626,678
Authority: US
Inventors: Yueh-Ting Chen
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-26
Filing date: 2009-11-26
Publication date: 2011-05-26

Abstract

A scraper includes a cylinder, a clamp, a blade and a striker. The cylinder includes a closed end and an open end. The clamp is secured to the closed end of the cylinder. The blade is clamped with the clamp. The striker includes a striking end movably inserted in the cylinder for striking the closed end of the cylinder to cause the blade to scrape a tile from a floor or wall.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a scraper for scraping a tile or plastic or dirt from a floor or wall.
2. Related Prior Art
Referring to FIG. 1, a conventional scraper includes a stem 1, a cushioning grip 4 provided on the stem 1, an anvil 2 secured to an end of the stem 1, a holder 3 secured to an opposite end of the stem 1 and a blade 5 held on the holder 3 with fasteners 6. The blade 5 includes apertures (not shown). The fasteners 6 are driven into the holder 3 through the apertures of the blade 5. A user uses a hand to hold the conventional scraper by the grip 4 and uses another hand to operate a hammer. The user maneuvers the hammer to strike the anvil 2 to cause the blade 3 to scrape a tile from a floor or wall.
Problems are however encountered during the use of the conventional scraper. Firstly, the user could accidentally hit the hand on which the conventional scraper is held. Secondly, it is hard to properly provide a force to the stem 1 to cause the blade 3 to scrape the tile from the floor or wall by waving striking the anvil 2. This difficulty is partly because an axial component of the force could be too small to scrape the tile from the floor or wall. This difficulty is partly because an undesirable transverse component of the force could offset the blade 3 from the tile. Thirdly, the user could hurt himself or herself or any person nearby when the user accidentally strikes the tile in the middle and therefore breaks the tile and scatters scraps of the tile. Fourthly, the user could soon feel sore or numb in the hands because of strong shock caused by the hammer hitting the conventional scraper. Fifthly, the user could not attach the blade 5 to the holder 3 if the apertures of the blade 5 are too small for the fasteners 6. Sixthly, the anvil 2 could soon be damaged.
The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.

SUMMARY OF THE INVENTION

It is an objective of the present invention to provide a scraper with which it is impossible for a user to hit a hand by mistake.
It is another objective of the present invention to provide a scraper with which the user can always exert a force in a right direction.
It is another objective of the present invention to provide a scraper with which the user can exert a force at a right scale.
It is another objective of the present invention to provide a scraper with which it is almost impossible for a user to hit hurt himself or herself or any person nearby.
It is another objective of the present invention to provide a scraper with which the user would not soon feel sore or numb in the hands.
It is another objective of the present invention to provide a scraper with which the user can always position a blade.
It is another objective of the present invention to provide a reliable, enduring scraper.
According to the present invention, the scraper includes a cylinder, a clamp, a blade and a striker. The cylinder includes a closed end and an open end. The clamp is secured to the closed end of the cylinder. The blade is clamped with the clamp. The striker includes a striking end movably inserted in the cylinder for striking the closed end of the cylinder to cause the blade to scrape an object from another object.
Other objectives, advantages and features of the present invention will become apparent from the following description referring to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be described via detailed illustration of the preferred embodiment versus prior art referring to the drawings where:

FIG. 1 is a front view of a conventional scraper;

FIG. 2 is an exploded view of a scraper according to the preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of the scraper shown in FIG. 2;

FIG. 4 is an enlarged, partial view of the scraper shown in FIG. 3;

FIG. 5 is a side view of the scraper shown in FIG. 2; and

FIG. 6 is a perspective view of the scraper shown in FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 2 to 6, a scraper includes a cylinder 10, a clamp 20, a blade 30 and a striker 40 according to the preferred embodiment of the present invention. The cylinder 10 includes a space 11 defined therein, between a closed end 13 and an open end. The closed end 13 of the cylinder 10 is hardened so that the hardness of the closed 13 of the cylinder 10 is higher than that of the other portion of the same. The closed end 13 of the cylinder 10 is preferably a hardened block that is made separately and then secured to the cylinder 10 via fitting or welding for example. The cylinder 10 includes a thread 14 formed on an external side, near the open end.
There is provided a ring 15. The ring 15 includes a thread 151 formed on an internal side and an aperture 152 defined therein.
The clamp 20 includes a first jaw 21 and a second jaw 22. The first jaw 21 includes a recess 211. The depth of the recess 211 is identical to or smaller than the thickness of the blade 30.
The blade 30 can be a typical blade, i.e., a blade with apertures. Preferably, the blade 30 does not include any aperture defined therein.
The striker 40 includes an elongated body with a striking end 41. The striking end 41 of the striker 40 is hardened so that the hardness of the striking end of the striker 40 is higher than that of the rest portion of the same. Preferably, the striking end 41 of the striker 40 is a hardened block that is made separately and then secured to the striker 40 by welding for example. A diameter of the striking end 41 of the striker 40 is larger than that of the other portion of the same, and a shoulder 42 is therefore formed between them. The diameter of the striking end 41 of the striker 40 is larger than an internal diameter of the ring 15. The diameter of the other portion of the striker 40 is smaller than the internal diameter of the ring 15.
In assembly, a cushioning grip 12 made of a soft, shock-absorbing material is provided around the cylinder 10. The first jaw 21 of the clamp 20 is secured to the closed end 13 of the cylinder 10 by welding for example. The blade 30 is partially located in the recess 211 of the first jaw 21. The second jaw 22 is located on the blade 30. That is, the blade 30 is sandwiched between the first jaw 21 and the second jaw 22. At least one fastener 23 is used to detachably fasten the second jaw 22 to the first jaw 21. Thus, the blade 30 is firmly held between the first jaw 21 and the second jaw 22.
The striking end 41 of the striker 40 is movably inserted in the cylinder 10. The thread 151 of the ring 15 is engaged with the thread 14 of the cylinder 10 to attach the ring 15 to the cylinder 10 near the open end. Thus, the striking end 41 is retained in the cylinder 10. The other portion of the striker 40 is inserted through the ring 15. A cushioning grip 43 made of a soft, shock-absorbing material is provided on the striker 40.
In use, a user holds the cylinder 10 by the cushioning grip 12 with a hand and holds the striker 40 by the cushioning grip 43 with the other hand. The use aims the blade 30 at an edge of a tile or more particularly concrete between the tile and a floor. The user strikes the closed end 13 of the cylinder 10 with the striking end 41 of the striker 40. The force is transferred to the blade 30 via the clamp 20. The force enables the blade 30 to scrape the tile from the floor or wall.
The scraper of the present invention exhibits several advantages. Firstly, it is impossible for a user to hit a hand by mistake. This advantage partly results from a fact that no hammer is used and partly results from another fact the striking end 41 of the striker 40 is always located in the cylinder 10. There is no chance that the user's hand could come between the striking end 41 of the striker 40 and the closed end 13 of the cylinder 10.
Secondly, the user can always exert a force in a right direction because the striking end 41 of the striker 40 is guided by the cylinder 10.
Thirdly, the user can exert a force at a right scale via adjusting the spacing between the striking end 41 of the striker 40 and the closed end 13 of the cylinder 10 before a striking stroke.
Fourthly, it is almost impossible for the user to hit hurt himself or herself or any person nearby because the user would not exert any transverse component of a force to offset the blade 30 from the tile.
Fifthly, the user does not soon feel sore or numb in the hands for two reasons. The cushioning grips 12 and 43 are used. Moreover, no hammer is used.
Sixthly, the user can always position the blade 30 because there is no need to make any aperture in the blade 30 corresponding to a fastener.
Seventhly, the scraper is reliable, enduring for including the hardened closed end 13 of the cylinder 10 and the hardened striking end 41 of the striker 40.
The present invention has been described via the detailed illustration of the preferred embodiment. Those skilled in the art can derive variations from the preferred embodiment without departing from the scope of the present invention. Therefore, the preferred embodiment shall not limit the scope of the present invention defined in the claims.

Claims

1. A scraper comprising:

a cylinder including a closed end and an open end;

a clamp secured to the closed end of the cylinder;

a blade clamped with the clamp; and

a striker including a striking end movably inserted in the cylinder for striking the closed end of the cylinder to cause the blade to scrape an object from another object.

2. The scraper according to claim 1, wherein the closed end of the cylinder is a hardened portion, wherein the striking end of the striker is a hardened portion.

3. The scraper according to claim 2, wherein the closed end of the cylinder is a hardened block secured to the cylinder, wherein the striking end of the striker is a hardened block secured to the striker.

4. The scraper according to claim 1, including a ring connected to the cylinder, wherein the striker is axially inserted through the ring, wherein an internal diameter of the ring is smaller than a diameter of the striking end of the striker.

5. The scraper according to claim 4, wherein the ring includes a thread formed on an internal side, wherein the cylinder includes a thread formed on an external side and engaged with the thread of the ring.

6. The scraper according to claim 1, including a cushioning grip provided on the cylinder.

7. The scraper according to claim 1, including a cushioning grip provided on the striker.

8. The scraper according to claim 1, wherein the clamp includes:

a first jaw secured to the closed end of the cylinder; and

a second jaw detachably connected to the first jaw, wherein the blade is sandwiched between the first and second jaws.

9. The scraper according to claim 8, wherein the first jaw includes a recess for receiving the blade.

10. The scraper according to claim 9, including at least one fastener for fastening the second jaw to the first jaw.