Impact hammer tool bit retainer incorporating shielding ring
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B23B-031/22
출원번호
US-0072268
(2008-02-25)
등록번호
US-8746702
(2014-06-10)
발명자
/ 주소
Benedict, Robert J.
출원인 / 주소
Ajax Tool Works, Inc.
대리인 / 주소
Pappas, George
인용정보
피인용 횟수 :
1인용 특허 :
26
초록▼
A retainer for holding a tool bit on an impact hammer including a shielding ring at the retainer distal end. The retainer includes an axially slidable sleeve whereby tool bits may be selectively exchanged on the retainer and whereby tool bits are secured in the retainer for use thereof. The sleeve i
A retainer for holding a tool bit on an impact hammer including a shielding ring at the retainer distal end. The retainer includes an axially slidable sleeve whereby tool bits may be selectively exchanged on the retainer and whereby tool bits are secured in the retainer for use thereof. The sleeve is axially slidable toward the retainer distal end for placing the retainer in the locked or in-use position, and is axially slidable away from the distal end against the force of a spring for placing the retainer in the tool bit release position. The shielding ring extends radially beyond the axially slidable sleeve for preventing inadvertent axial movement of the sleeve to the release position by debris and/or objects which come in contact with the retainer distal end, and thereby aiding in the prevention of inadvertent release of the tool bit during use.
대표청구항▼
1. In a retainer for holding a tool bit on an impact hammer, wherein the retainer includes a body portion having a tool receiving distal end and an opposite end for securement to an impact hammer, a tool receiving bore extending into the body portion from an opening at said distal end, a sleeve circ
1. In a retainer for holding a tool bit on an impact hammer, wherein the retainer includes a body portion having a tool receiving distal end and an opposite end for securement to an impact hammer, a tool receiving bore extending into the body portion from an opening at said distal end, a sleeve circumscribing said retainer body, wherein said sleeve is axially slidable on said body portion toward said tool receiving distal end to a first axial position whereat a tool bit shank received in said tool receiving bore is captured therein and prevented from exiting said bore and is axially slidable on said body portion toward said tool body opposite end to a second axial position whereat a tool bit shank may be inserted into and removed from said tool receiving bore, and a spring biasing said sleeve axially toward said tool distal end and toward said sleeve first position, an improvement comprising: a shielding ring between said tool receiving distal end and said sleeve, said shielding ring being incapable of releasing the tool bit and extending radially a distance sufficient to effectively shield said sleeve during use of the tool by preventing inadvertent axial movement of said sleeve by debris or objects which come in contact with said distal end and preventing movement of said sleeve from said first position to said second position and thereby preventing inadvertent release of the tool bit from said tool receiving bore; wherein said shielding ring includes a through hole, said tool body portion axially extending through said shielding ring through hole and wherein said shielding ring is secured to said tool body portion near said distal end; and,further comprising ring clips located axially on each side of said shielding ring and detachably secured to said tool body portion, whereby said shielding ring is axially secured on said tool body portion between said ring clips. 2. The improvement of claim 1 wherein said tool body portion includes annular grooves wherein each of said ring clips are selectively received and are thereby axially detachably secured. 3. The improvement of claim 2 wherein said sleeve has an outer surface which may be grasped and whereby said sleeve may be axially moved against the spring bias to said sleeve second position, said sleeve outer surface being defined by an outer diameter, said shielding ring has an outer surface defined by an outer diameter, and wherein said shielding ring outer diameter is greater than said sleeve outer diameter. 4. The improvement of claim 3 wherein said shielding ring outer diameter is at least 10% greater than said sleeve outer diameter. 5. A retainer for holding a tool bit on an impact hammer, said retainer comprising: a body portion having a tool receiving distal end and an opposite end, said opposite end adapted for securement to an impact hammer;a tool receiving bore extending axially into said body portion from an opening at said distal end toward said opposite end;a sleeve circumscribing said retainer body portion, wherein said sleeve is axially slidable on said body portion toward said tool receiving distal end to a first axial position whereat a tool bit shank received in said tool receiving bore is captured therein and prevented from exiting said bore and is axially slidable on said body portion toward said tool body opposite end to a second axial position whereat a tool bit shank may be inserted into and removed from said tool receiving bore;a spring biasing said sleeve axially toward said tool distal end and toward said sleeve first position; and,a shielding ring between said tool receiving distal end and said sleeve, said shielding ring extending radially a distance sufficient to effectively shield said sleeve during use of the tool by preventing inadvertent axial movement of said sleeve by debris or objects which come in contact with said distal end and preventing movement of said sleeve from said first position to said second position and thereby preventing inadvertent release of the tool bit from said tool receiving bore; and,wherein said shielding ring includes a through hole, said tool body portion axially extending through said shielding ring through hole and wherein said shielding ring is secured to said tool body portion near said distal end; and,further comprising ring clips located axially on each side of said shielding ring and detachably secured to said tool body portion, whereby said shielding ring is axially secured on said tool body portion between said ring clips. 6. The retainer of claim 5 wherein said tool body portion includes annular grooves wherein each of said ring clips are selectively received and are thereby axially detachably secured. 7. The improvement of claim 5 wherein said shielding ring outer diameter is at least 10% greater than said sleeve outer diameter. 8. The retainer of claim 5 said body portion includes a threaded bore extending axially into said body portion from said opposite end, said threaded bore adapted to threadingly receive a threaded barrel end of an impact hammer, whereby said body portion may be secured to an impact hammer. 9. The retainer of claim 5 wherein said body portion includes an attachment bore extending axially into said body portion from said opposite end, an attachment sleeve secured in said attachment bore, said attachment sleeve having a threaded bore adapted to threadingly engage a threaded barrel end of an impact hammer, whereby said body portion may be secured to an impact hammer. 10. The retainer of claim 5 further comprising a ball detent hole extending radially through said body portion from said tool receiving bore to said sleeve, a ball captured between said body portion and said sleeve, wherein said ball is larger than said detent hole and is sized whereby, when said ball is seated in said detent hole, an exterior surface of said ball projects into said tool receiving bore and provides interference with the tool bit shank preventing removal of the tool bit from the tool receiving bore, said sleeve having a first and second camming surfaces selectively engaging said ball as said sleeve moves between said sleeve first and second axial positions, said first ramming surface located radially closer to said body portion than said second camming surface, said first ramming surface corresponding with said sleeve first axial position whereby, when said sleeve is in its first axial position, said first camming surface engages said ball causing said ball to seat in said detent hole and causing said ball exterior surface to project into said tool receiving bore, and said second camming surface corresponding with said sleeve second axial position whereby, when said sleeve is in its second axial position, said second ramming surface allows said ball to become unseated from said detent hole causing said ball exterior surface to be removed from said tool receiving bore and thereby allowing a tool bit shank to be inserted into and removed from said tool receiving bore. 11. The retainer of claim 5 wherein said spring circumscribes said body portion and extends between a raised annular shoulder on said body portion and said sleeve.
Baburske, Roman; Dainese, Matteo; Lechner, Peter; Schulze, Hans-Joachim; Laven, Johannes Georg, Method of manufacturing a semiconductor device having electrode trenches, isolated source zones and separation structures.
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