# US 5,347,891 A · Adjustable spanner wrench assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,347,891 A - Document ID: US5347891A - Status: Granted - Kind: A - Application number: 08/111,324 - Filed: 1993-08-24 - Granted: 1994-09-20 - Earliest claimed: 1993-08-24 - Assignees: Caterpillar Inc. - Inventors: Michael E. Kamp; Michael W. Rabe - Web page: https://patentgrep.com/patent/US5347891A ## CPC - B25B 13/5016: {by externally gripping the pipe} - B25B 13/10: with adjustable jaws (B25B13/46, B25B13/48 {B25B13/5041} take precedence) - B25B 13/16: by screw or nut - B25B 13/48: for special purposes - B25G 1/063: {for screwdrivers, wrenches or spanners} - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING - B25G: HANDLES FOR HAND IMPLEMENTS (attaching the blades or the like to handles of hand tools for soil working A01B1/22; handles of hand implements for harvesting A01D1/14; handles integral with brushware A46B) ## Abstract An adjustable wrench assembly for installing and removing a threaded cap member of an hydraulic cylinder assembly includes a head member adapted to partially surround the piston rod of the cylinder assembly. A cover plate attaches to the head member to completely surround the piston rod. A plurality of adjustable contact pins accommodate various sizes of piston rods and are engagable with the piston rod to keep the wrench square and prevent it from twisting. Various sizes of adapter plates are connectable to the head member and include a plurality of engagable pins to engage mating slots or holes in the cap member. The adjustable contact pins include non-metallic plastic contact portions to prevent marring of the piston rod. ## Claims ### Claim 1 An adjustable spanner wrench assembly for installing and removing components of a structure, comprising: a head member having a circumferential surface and a generally u-shaped configuration defining first and second leg portions and an interior cavity; a cover plate having first and second spaced apart surface portions and a plurality of first and second apertures extending through said plate from said first surface portion to said second surface portion; a handle member connected to said circumferential surface of said head member; an adapter plate having a generally u-shaped configuration defining first and second leg portions and a plurality of component engagable pins, said adapter plate being adapted to be connected to said head member; a plurality of first adjustable contact pins associated with said head member and adapted to extend into said interior cavity; and a plurality of second adjustable contact pins associated with said cover plate and being adapted to be positioned in said first apertures. ### Claim 2 (depends on 1) An adjustable spanner wrench assembly, as set forth in claim 1, wherein each of said first and second adjustable contact pins includes a non-metallic contact portion and a threaded shaft portion, said contact portion being connected to said shaft portion by a swivel connection. ### Claim 3 (depends on 1) An adjustable spanner wrench assembly, as set forth in claim 1, including a plurality of threaded fasteners and wherein said cover plate is removable connected to said first and second leg portions of said head member by said threaded fasteners which extend through said second apertures. ### Claim 4 (depends on 1) An adjustable spanner wrench assembly, as set forth in claim 1, wherein said head member defines a longitudinal slot at the base of said cavity and including a rectangularly shaped non-metallic plate positioned in said slot. ### Claim 5 (depends on 1) An adjustable spanner wrench assembly, as set forth in claim 1, wherein said component engagable pins are connected to said adapter plate leg portions and extend radially inwardly toward said cavity. ### Claim 6 (depends on 5) An adjustable spanner wrench assembly, as set forth in claim 5, wherein said adapter plate leg portions define a step portion and said component engagable pins are positioned above said step portion. ### Claim 7 (depends on 1) An adjustable spanner wrench assembly, as set forth in claim 1, wherein said adapter plate defines an axial centerline and wherein said component engagable pins are connected to said adapter plate leg portions and extend outwardly of said adapter plate leg portions and substantially parallel to said axial centerline. ### Claim 8 (depends on 7) An adjustable spanner wrench assembly, as set forth in claim 7, wherein said adapter plate leg portions define a step portion and said component engagable pins extend outwardly of said step portion. ### Claim 9 (depends on 2) An adjustable spanner wrench assembly, as set forth in claim 2, wherein said contact portion of said first and second adjustable pins is a plastic material. ### Claim 10 (depends on 4) An adjustable spanner wrench assembly, as set forth in claim 4, wherein said plate is a plastic material. ### Claim 11 (depends on 1) An adjustable spanner wrench assembly, as set forth in claim 1, wherein said handle member defines a rectangular shaped through hole. ### Claim 12 An adjustable wrench assembly for assembling and disassembling components of a structure, comprising: a head member having a generally u-shaped configuration defining first and second leg portions and an interior cavity between said leg portions, said head member further defining a longitudinal slot at the base of said cavity; a rectangularly shaped non-metallic plastic plate adapted to be positioned in said longitudinal slot; a cover plate having a plurality of first apertures, said cover plate being adapted to be releasably connected to said head member to partially enclose said cavity; a handle member connected to said head member; an adapter plate having a generally u-shaped configuration defining first and second leg portions, and a plurality of component engagable pins, said adapter plate being adapted to be releasably connected to said head member; a plurality of first adjustable contact pins connectable to said head member and having a contact portion adapted to extend into said interior cavity; and a plurality of second adjustable contact pins connectable to said cover plate and having a contact portion adapted to extend into said interior cavity when said cover plate is connected to said head member, said second adjustable pins being adapted to be positioned in said first apertures. ### Claim 13 (depends on 12) An adjustable wrench assembly, as set forth in claim 12, wherein said contact portion of said first and second contact pins is a non-metallic plastic material. ### Claim 14 (depends on 12) An adjustable wrench assembly, as set forth in claim 12, wherein said component engagable pins extend radially inwardly toward said interior cavity. ### Claim 15 (depends on 12) An adjustable wrench assembly, as set forth in claim 12, wherein said adapter plate defines an axial centerline and wherein said component engagable pins extend outwardly of said adapter plate leg portions and substantially parallel to said axial centerline. ### Claim 16 (depends on 12) An adjustable wrench assembly, as set forth in claim 12, wherein each of said first and second contact pins include a threaded shaft portion and a swivel portion adapted to connect said shaft portion to said contact portion.