# US 8,782,908 B2 · Stud punch tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,782,908 B2 - Document ID: US8782908B2 - Status: Granted - Kind: B2 - Application number: 12/643,461 - Filed: 2009-12-21 - Published: 2011-06-23 - Granted: 2014-07-22 - Earliest claimed: 2009-12-21 - Assignees: Textron Innovations Inc. - Applicants: Wilbur Keith Moffatt; John T. Hagan - Inventors: Wilbur Keith Moffatt; John T. Hagan - Web page: https://patentgrep.com/patent/US8782908B2 ## CPC - B26D 5/16: Cam means - Y10T 83/8843: Cam or eccentric revolving about fixed axis - Y10T 83/9447: Shear type - B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A stud punch tool includes a lower frame, an upper handle pivotally attached to the lower frame, and a punching assembly attached to the lower frame and to the upper handle. The lower frame includes a body portion, a pair of ears extending upwardly therefrom, and a head portion and a handle portion extending from the body portion. The upper handle is attached to the ears. The punching assembly is connected to the head portion and is connected to the upper handle proximate to the connection of the upper handle to the ears. The upper handle can be gripped by a user for movement relative to the lower frame to cause the punching assembly to punch a hole in an associated workpiece. ## Claims ### Claim 1 A stud punch tool comprising: a lower frame comprising a body portion having a front end and a rear end, a head portion having a front end and a rear end, said rear end of said head portion extending from said front end of said body portion, said head portion comprising an upper portion connected to a lower portion, said upper and lower portions being separated from each other by a space for receiving a workpiece to be punched therein, a handle portion extending from said rear end of said body portion and capable of being gripped by a user, a first ear having a fixed end and a free end, said fixed end extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said first ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end positioned forwardly of said front end of said head portion such that a space is formed between said free end of said first ear and said head portion, a second ear having a fixed end and a free end, said fixed end of said second ear extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said second ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end of said second ear positioned forwardly of said front end of said head portion such that a space is formed between said free end of said second ear and said head portion, said first and second ears being spaced apart from each other; an upper handle attached to said free ends of said first and second ears at an attachment, said upper handle being moveable relative to said lower frame upon movement by a user; and a punching assembly connected to said head portion of said lower frame and connected to said upper handle, said attachment of said upper handle to said first and second ears being positioned forwardly of said punching assembly. ### Claim 2 (depends on 1) The stud punch tool as defined in claim 1, wherein said upper handle is attached to said first and second ears by a pin around which the upper handle is capable of pivoting relative to said lower frame. ### Claim 3 (depends on 1) The stud punch tool as defined in claim 1, wherein said upper handle includes a cam surface, and said punching assembly including a shaft having a cam engagement on an upper end thereof and a punch having a punching edge on a lower end thereof, said cam engagement forming at least one cam surface, said cam surface of said upper handle engaging with said at least one cam surface of said cam engagement, said upper handle and said shaft being moveable relative to each other. ### Claim 4 (depends on 3) The stud punch tool as defined in claim 3, wherein said upper handle is pivotally attached to said first and second ears. ### Claim 5 (depends on 3) The stud punch tool as defined in claim 3, wherein said shaft extends through said upper portion; and said punching assembly includes a die mounted in said lower portion. ### Claim 6 (depends on 5) The stud punch tool as defined in claim 5, wherein said die is removable from said lower portion. ### Claim 7 (depends on 5) The stud punch tool as defined in claim 5, wherein said punch is removable from said shaft. ### Claim 8 (depends on 7) The stud punch tool as defined in claim 7, wherein said punch is attached to said shaft by a single fastener. ### Claim 9 (depends on 7) The stud punch tool as defined in claim 7, wherein said die is removable from said lower portion. ### Claim 10 A stud punch tool comprising: a lower frame comprising a body portion having a front end and a rear end, a head portion having a front end and a rear end, said rear end of said head portion extending from said front end of said body portion, said head portion comprising an upper portion connected to a lower portion, said upper and lower portions being separated from each other by a space for receiving a workpiece to be punched therein, a handle portion extending from said rear end of said body portion and capable of being gripped by a user, a first ear having a fixed end and a free end, said fixed end extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said first ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end, a second ear having a fixed end and a free end, said fixed end of said second ear extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said second ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end of said second ear, said first and second ears being spaced apart from each other; an upper handle attached to said free ends of said first and second ears, said upper handle including a cam surface, said upper handle being moveable relative to said lower frame upon movement by a user; and a punching assembly connected to said head portion of said lower frame and connected to said upper handle, said punching assembly including a shaft extending through said upper portion of said head portion and having a cam engagement on an upper end thereof, a punch having a punching edge on a lower end thereof and a die mounted in said lower portion, said cam engagement forming at least one cam surface, said cam surface of said upper handle engaging with said at least one cam surface of said cam engagement, said upper handle and said shaft being moveable relative to each other; wherein an outer surface of said cam engagement extends beyond an outer surface of said shaft; and further including a sleeve having a passageway therethrough, said shaft being mounted within said passageway, and a spring mounted between an upper end of said sleeve and said cam engagement. ### Claim 11 (depends on 10) The stud punch tool as defined in claim 10, wherein said shaft includes a protrusion extending outwardly therefrom, said passageway of said sleeve includes at least two recesses therein, said protrusion is first positioned within one of said recesses and then positioned within the other of said recesses during assembly of said shaft with said sleeve. ### Claim 12 (depends on 10) The stud punch tool as defined in claim 10, wherein said sleeve is formed of acetyl resin and said lower frame and said upper handle are formed of one of long glass composite and nylon. ### Claim 13 A stud punch tool comprising: a lower frame comprising a body portion having a front end and a rear end, a head portion having a front end and a rear end, said rear end of said head portion extending from said front end of said body portion, a handle portion extending from said rear end of said body portion and capable of being gripped by a user, a first ear having a fixed end and a free end, said fixed end extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said first ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end, a second ear having a fixed end and a free end, said fixed end of said second ear extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said second ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end of said second ear, said first and second ears being spaced apart from each other; an upper handle attached to said free ends of said first and second ears, said upper handle includes a lip which extends outwardly from said body portion, said lip forming a cam surface of said upper handle, said upper handle being moveable relative to said lower frame upon movement by a user; and a punching assembly connected to said head portion of said lower frame and connected to said upper handle, said punching assembly including a shaft, a cam engagement on an upper end of said shaft, and a punch having a punching edge on a lower end of said shaft, said cam engagement comprising a first cam surface at an upper end of said shaft, a pair of arms extending from opposite sides of said first cam surface, each said arm having a vertical section and a horizontal section, said horizontal section being spaced from said first cam surface, a cam surface formed on a lower end of said horizontal section thereby defining second and third cam surfaces, a passageway formed between said first cam surface and said second and third cam surfaces, said first, second and third cam surfaces engaging with said lip on said upper handle such that said lip is positioned within said passageway. ### Claim 14 (depends on 1) The stud punch tool as defined in claim 1, further including a clip provided on said upper handle and a clip retainer provided on said lower frame, said clip being engageable with said clip retainer. ### Claim 15 (depends on 14) The stud punch tool as defined in claim 14, wherein said clip is slidable on said upper handle, and said upper handle includes a stop provided thereon for preventing movement of said clip in a forward direction. ### Claim 16 (depends on 14) The stud punch tool as defined in claim 14, wherein said upper handle further includes a lip which extends outwardly from said body portion, said clip having a passageway therein in which the lip is positioned. ### Claim 17 (depends on 16) The stud punch tool as defined in claim 16, wherein said clip includes a second passageway, said clip retainer being positioned within said second passageway when said clip is engaged with said clip retainer. ### Claim 18 (depends on 1) The stud punch tool as defined in claim 1, wherein said head portion is C-shaped. ### Claim 19 (depends on 18) The stud punch tool as defined in claim 18, wherein said head portion comprises an upper horizontal portion connected to a lower horizontal portion by a middle vertical portion, said upper and lower portions being separated from each other by a space for receiving a workpiece to be punched therein, said upper portion having a bore therethrough; said punch assembly including a shaft extending through said bore of said upper portion, and a punch having a punching edge provided at a lower end of said shaft. ### Claim 20 A stud punch tool comprising: a lower frame; an upper handle including a cam surface, said upper surface attached to said lower frame, said upper handle being moveable relative to said lower frame upon movement by a user; and a punching assembly attached to said lower frame and to said upper handle, said punching assembly including a shaft, a cam engagement on an upper end of said shaft, and a punch having a punching edge on a lower end of said shaft for engagement with a workpiece, said cam engagement comprising a first cam surface at an upper end of said shaft, a pair of arms extending from opposite sides of said first cam surface, each said arm having a vertical section and a horizontal section, said horizontal section being spaced from said first cam surface, a cam surface formed on a lower end of said horizontal section thereby defining second and third cam surfaces, a passageway formed between said first cam surface and said second and third cam surfaces, said first, second and third cam surfaces engaging with said cam surface of said upper handle such that said cam surface of upper handle is positioned within said passageway, said upper handle and said punching assembly being moveable relative to each other. ### Claim 21 (depends on 20) The stud punch tool as defined in claim 20, wherein said upper handle has a body portion and said cam surface on said upper handle is formed from a lip which extends outwardly from said body portion. ### Claim 22 (depends on 20) The stud punch tool as defined in claim 20, wherein said lower frame includes a head portion comprising an upper portion connected to a lower portion, said upper and lower portions being separated from each other by a space for receiving a workpiece to be punched therein; said shaft extending through said upper portion of said head portion and being moveable relative to said upper portion of said head portion. ### Claim 23 (depends on 22) The stud punch tool as defined in claim 22, wherein said lower portion of said head portion includes a die which is removable from said lower portion. ### Claim 24 (depends on 20) The stud punch tool as defined in claim 20, wherein said punch is removable from said punch shaft. ### Claim 25 (depends on 20) The stud punch tool as defined in claim 20, wherein said lower frame comprises a body portion having a front end and a rear end, a head portion having a front end and a rear end, said punching assembly being received in said head portion, said rear end of said head portion extending from said front end of said body portion, a handle portion extending from said rear end of said body portion and capable of being gripped by a user, a first ear having a fixed end and a free end, said fixed end extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said first ear extending upwardly from said fixed end and toward said front end and terminating in said free end, a second ear having a fixed end and a free end, said fixed end of said second ear extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said second ear extending upwardly from said fixed end and toward said front end and terminating in said free end of said second ear, said first and second ears being spaced apart from each other, said upper handle being attached to said free ends of said first and second ears. ### Claim 26 A stud punch tool comprising: a lower frame comprising a body portion having a front end and a rear end, a head portion having a front end and a rear end, said rear end of said head portion extending from said front end of said body portion, a handle portion extending from said rear end of said body portion and capable of being gripped by a user; an upper handle attached to said lower frame and being moveable relative to said lower frame upon movement by a user; and a punching assembly connected to said head portion of said lower frame and connected to said upper handle, said punching assembly including a shaft having a cam engagement on an upper end thereof and a punch having a punching edge on a lower end thereof, a sleeve having a passageway therethrough, said passageway including at least two recesses therein, said shaft including a protrusion extending outwardly therefrom, said protrusion being first positioned within one of said recesses and then positioned within the other of said recesses during assembly of said shaft with said sleeve, and a spring mounted between an upper end of said sleeve and said cam engagement. ### Claim 27 (depends on 26) The stud punch tool as defined in claim 26, wherein said upper handle includes a cam surface, said cam surface of said upper handle engaging with said cam engagement, said upper handle and said shaft being moveable relative to each other. ### Claim 28 (depends on 26) The stud punch tool as defined in claim 26, wherein said head portion comprising an upper portion connected to a lower portion, said upper and lower portions being separated from each other by a space for receiving a workpiece to be punched therein; said shaft extending through said upper portion; and said punching assembly includes a die mounted in said lower portion. ### Claim 29 (depends on 28) The stud punch tool as defined in claim 28, wherein said die is removable from said lower portion. ### Claim 30 (depends on 29) The stud punch tool as defined in claim 29, wherein said punch is removable from said shaft. ### Claim 31 (depends on 26) The stud punch tool as defined in claim 26, wherein said shaft sleeve is formed of acetyl resin and said lower frame and said upper handle are formed of one of long glass composite and nylon. ### Claim 32 (depends on 20) The stud punch tool as defined in claim 20, wherein said lower frame and said upper handle are formed of one of long glass composite and nylon. ### Claim 33 A stud punch tool comprising: a lower frame comprising a body portion having a front end and a rear end, a head portion having a front end and a rear end, said rear end of said head portion extending from said front end of said body portion, said head portion comprising an upper portion connected to a lower portion, said upper and lower portions being separated from each other by a space for receiving a workpiece to be punched therein, a handle portion extending from said rear end of said body portion and capable of being gripped by a user, a first ear having a fixed end and a free end, said fixed end extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said first ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end such that a space is formed between said free end of said first ear and said head portion, a second ear having a fixed end and a free end, said fixed end of said second ear extending from said body portion rearwardly of the head portion and forwardly of said handle portion, said second ear extending upwardly from said fixed end and toward said front end of said body portion and terminating in said free end of said second ear such that a space is formed between said free end of said second ear and said head portion, said first and second ears being spaced apart from each other; an upper handle attached to said free ends of said first and second ears, said upper handle being moveable relative to said lower frame upon movement by a user, said upper handle includes a cam surface; and a punching assembly connected to said head portion of said lower frame and connected to said upper handle, said punching assembly including a shaft having a cam engagement on an upper end thereof and a punch having a punching edge on a lower end thereof, said cam engagement forming at least one cam surface, said cam surface of said upper handle engaging with said at least one cam surface of said cam engagement, said upper handle and said shaft being moveable relative to each other. ### Claim 34 (depends on 33) The stud punch tool as defined in claim 33, wherein said upper handle is pivotally attached to said first and second ears. ### Claim 35 (depends on 33) The stud punch tool as defined in claim 33, wherein said shaft extends through said upper portion; and said punching assembly includes a die mounted in said lower portion.