GB2313878A - A paste dispensing gun - Google Patents

A paste dispensing gun Download PDF

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Publication number
GB2313878A
GB2313878A GB9609236A GB9609236A GB2313878A GB 2313878 A GB2313878 A GB 2313878A GB 9609236 A GB9609236 A GB 9609236A GB 9609236 A GB9609236 A GB 9609236A GB 2313878 A GB2313878 A GB 2313878A
Authority
GB
United Kingdom
Prior art keywords
pushing rod
barrel
pushing
paste
stock
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
Application number
GB9609236A
Other versions
GB9609236D0 (en
GB2313878B (en
Inventor
Wei-Chieh Su
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SU WEI CHIEH
Original Assignee
SU WEI CHIEH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SU WEI CHIEH filed Critical SU WEI CHIEH
Priority to GB9609236A priority Critical patent/GB2313878B/en
Publication of GB9609236D0 publication Critical patent/GB9609236D0/en
Publication of GB2313878A publication Critical patent/GB2313878A/en
Application granted granted Critical
Publication of GB2313878B publication Critical patent/GB2313878B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like

Abstract

A paste dispensing gun including a pushing rod (20) extending through a stock (13)into a barrel (10), a resilient clip member(50) fitted on the pushing rod between a rear wall (13) of the stock and a rear wall(11) of the barrel, a pushing board (30)and a pushing spring (40) fitted around the pushing rod between the clip member and the rear wall (13)_the stock, and a trigger (60) pivotally connected with the stock under the pushing rod. After the barrel is filled with the paste and when the trigger is pulled, the pushing board is driven to push the pushing rod forward so as to squeeze the paste out of the barrel. The gripping force of the clip member does not prevent the pushing rod from being stably pushed forward. When the pushing rod is pushed to a fixed position, the clip member also serves to somewhat locate the pushing rod. If excessive pressure is created in the barrel, the clip allows the pushing rod to be retreated to buffer the backfeed pressure so as to prevent the paste from being over dispensed and wasted.

Description

A PASTE DISPENSING GUN BACKGROUND OF THE INVENTION The present invention relates to a paste dispensing gun.
By means of the clipping of a clip member, the pushing rod can be stably pushed forward and when the pushing rod is pushed to a fixed position, the clip member also serves to somewhat locate the pushing rod. In the case that an excessive pressure is created in the barrel. the pushing rod can be properly retreated to buffer the backfeed pressure so as to prevent the paste from being over-dispensed out and avoid waste of the paste.
Fig. 1 shows a conventional paste dispensing gun in which a pushing rod 2 extends through a stock 1 into the barrel 3.
A pushing board 4 is fitted on the pushing rod 2 between a rear wall 11 of the stock 1 and a rear wall 31 of the barrel 3. A spring 5 is fitted around the pushing rod between the pushing board 4 and the rear wall 31 of the barrel 3. A pivotable stopper board 6 is disposed behind the rear wall 11 of the stock 1 and another spring 7 is disposed between the stopper board 6 and the rear wall 12 of the stock 11. A trigger 8 is pivotally connected with the stock 1 under the pushing rod 2.
Referring to Fig. 2. by means of pulling the trigger 8, the pushing board 4 is driven to push the pushing rod 2 forward. At this time, the stopper board 6 is pushed by the spring 7 to together with the pushing rod 6 contain an angle e for stopping and preventing the pushing rod 2 from retreating, so that the trigger can be further pulled to keep the pushing rod 2 moving forward. referring to Fig. 3.
when the pushing rod 2 is pushed to the end of the barrel. a user needs to depress the stopper board 6 with his/her thumb to eliminate the angle e and the stopping force so as to pull back the pushing rod 2.
According to the above arrangement, the stopper board 6 serves to make the pushing rod 2 only pushed forward by the pushing board 4 without retreating. This is able to dispense the paste out of the barrel. However, there is no buffering space between the pushing rod and the barrel and a feedback pressure is often created inside the barrel under compression due to the physical property of the paste. In the case that the pressure is not relieved by any buffering space, some additional paste will be further squeezed out to relieve the pressure. This leads to waste of the paste.
SUMMARY OF THE INVENTION It is therefore a primary object of the present invention to provide a paste dispensing gun which operates without dripping paste. The invention provides a paste dispensing gun comprising a pushing rod extending through a stock into a barrel, a friction member being fitted on the pushing rod between a rear wall of the stock and a rear wall of the barrel, a pushing board and then a pushing spring being fitted around the pushing rod between the friction member and the rear wall of the stock, whereby after the barrel is filled with paste the pushing board is driven to push the pushing rod forward so a to squeeze the paste out of the barrel.
The paste dispensing gun may include a pushing rod extending through a stock into a barrel, a resilient clip member fitted on the pushing rod between a rear wall of the stock and a rear wall of the barrel, a pushing board and a pushing spring fitted around the pushing rod between the clip member and the rear wall of the stock, and a trigger pivotally connected with the stock under the pushing rod. By means of the clipping of the clip member, the pushing rod can be stably pushed forward. When the pushing rod is pushed to a fixed position, the clip member also serves to somewhat locate the pushing rod. In the case that an excessive pressure is created in the barrel, the pushing rod can be properly retreated to buffer the backfeed pressure so as to prevent the, paste from being over-dispensed out and avoid waste of the paste.
The present invention can be best understood through the following description and accompanying drawings, wherein: BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional assembled view of a convention paste dispensing gun: Fig. 2 is a view according to Fig. 1, showing that the pushing rod is pushed forward to dispense the past out of the barrel; Fig 3 is a view according to Fig.l, showing that the pushing rod is pulled back; Fig 4 is a perspective exploded view of the present invention; Fig 5 is a perspective assembled view of the present invention: Fig. 6 is a side sectional view showing that the pushing rod is pushed forward to dispense the paste out of the barrel; and Fig. 7 is a view according to Fig. 6, showing that the pushing rod is pulled back to its home position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Please refer to Fig. 4. According to the present invention, a pushing rod 2 extends through a stock 12 into the barrel 10. A friction member in the form of a resilient clip member 50 is fitted on the pushing rod 20 between a rear wall 13 of the stock 12 and a rear wall 11 of the barrel 10. A pushing board 30 and then a pushing spring 5 are fitted around the pushing rod 20 between the clip member 50 and the rear wall 13 of the stock 12. A trigger 60 is pivotally connected with the stock 12 under the pushing rod 20 to form a structure as shown in Fig. 5.
Referring to Fig. 6. after the barrel 10 is filled with the paste and when the trigger 60 is pulled, the pushing board 30 is driven to push the pushing rod 20 forward. At this time, a pushing disk 21 at the front end of the Pushing rod 20 serves to squeeze the paste out of the barrel. When the Pushing rod 20 reaches the end of the barrel, the user only needs to pull the end of the pushing rod 20 with a pulling force greater than the clipping force of the clip member 50 so as to easily pull the pushing rod 20 back to its home position as shown in Fig. 7.
By means of the clipping of the clip member, the pushing rod can be stably pushed forward. When the pushing rod is pushed to a fixed position, the clip member also serves to somewhat locate the pushing rod. In addition, in the case that an excessive pressure is created in the barrel, the pushing rod can be properly retreated to buffer the backfeed pressure so as to prevent the paste from being over-dispensed out and avoid waste of the paste.
The above embodiment is only an example of the present invention and the scope of the present invention should not be limited to the example. Any modification or variation derived from the example should fall within the scope of the present invention.

Claims (2)

ClAIMS:
1. A paste dispensing gun comprising a pushing rod extending through a stock into a barrel, a friction member being fitted on the pushing rod between a rear wall of the stock and a rear wall of the barrel, a pushing board and then a pushing spring being fitted around the pushing rod between the friction member and the rear wall of the stock, whereby after the barrel is filled with paste the pushing board is driven to push the pushing rod forward so as to squeeze the paste out of the barrel.
2. A paste dispensing gun comprising a pushing rod extending through a stock into a barrel, a resilient clip member being fitted on the pushing rod between a rear wall of the stock and a rear wall of the barrel, a pushing board and then pushing spring being fitted around the pushing rod between the clip member and the rear wall of the stock, a trigger being pivotally connected with the stock under the pushing rod, whereby after the barrel is filled with the paste and when the trigger is pulled, the pushing board is driven the push the pushing rod forward so as to squeeze the paste out of the barrel, said paste dispensing gun being characterized in that by means of the clipping of the clip member, the pushing rod can be stably pushed forward and when the pushing rod is pushed to a fixed position, the clip member also serves to somewhat locate the pushing rod and in the case that an excessive pressure is created in the barrel, the pushing rod can be properly retreated to buffer the backfeed pressure so as to prevent the paste from being over-dispensed out and avoid waste of the paste.
GB9609236A 1996-05-02 1996-05-02 A paste dispensing gun Expired - Fee Related GB2313878B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9609236A GB2313878B (en) 1996-05-02 1996-05-02 A paste dispensing gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9609236A GB2313878B (en) 1996-05-02 1996-05-02 A paste dispensing gun

Publications (3)

Publication Number Publication Date
GB9609236D0 GB9609236D0 (en) 1996-07-03
GB2313878A true GB2313878A (en) 1997-12-10
GB2313878B GB2313878B (en) 2000-02-02

Family

ID=10793109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9609236A Expired - Fee Related GB2313878B (en) 1996-05-02 1996-05-02 A paste dispensing gun

Country Status (1)

Country Link
GB (1) GB2313878B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520762A (en) * 1974-07-17 1978-08-09 Loctite Corp Hand actuated extrusion device
US4572409A (en) * 1983-05-02 1986-02-25 Gary Finnegan Drip free caulking gun
EP0448375A2 (en) * 1990-03-22 1991-09-25 Bba Group Plc. Dispensing gun
US5192008A (en) * 1992-01-23 1993-03-09 Dai Shyun Enterprise Co., Ltd. Pulling mechanism of an adhesive-dispensing gun

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520762A (en) * 1974-07-17 1978-08-09 Loctite Corp Hand actuated extrusion device
US4572409A (en) * 1983-05-02 1986-02-25 Gary Finnegan Drip free caulking gun
EP0448375A2 (en) * 1990-03-22 1991-09-25 Bba Group Plc. Dispensing gun
US5192008A (en) * 1992-01-23 1993-03-09 Dai Shyun Enterprise Co., Ltd. Pulling mechanism of an adhesive-dispensing gun

Also Published As

Publication number Publication date
GB9609236D0 (en) 1996-07-03
GB2313878B (en) 2000-02-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070502