US2836056A - Power operated plastering trowels - Google Patents

Power operated plastering trowels Download PDF

Info

Publication number
US2836056A
US2836056A US542421A US54242155A US2836056A US 2836056 A US2836056 A US 2836056A US 542421 A US542421 A US 542421A US 54242155 A US54242155 A US 54242155A US 2836056 A US2836056 A US 2836056A
Authority
US
United States
Prior art keywords
troweling
power operated
blades
members
trowels
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.)
Expired - Lifetime
Application number
US542421A
Inventor
John D Drummond
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US542421A priority Critical patent/US2836056A/en
Application granted granted Critical
Publication of US2836056A publication Critical patent/US2836056A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements

Definitions

  • the objects of the present invention are to provide a power operated trowel having two troweling members capable of troweling inside angle planes of walls and ceilings simultaneously and to prevent any plaster displaced by one member from being moved onto the plane being troweled by the other member.
  • a further object is to provide means whereby the troweling members are shielded to prevent their peripheral edges from cutting into the plaster in the plane adjacent which it is working.
  • Figure 1 is a side elevational view of the invention as seen when not in use.
  • Figure 2 is an elevational view showing the face of one of the troweling members.
  • Figure 3 is a detail perspective view showing the manner in which the blades of a troweling member are adjusted.
  • the numeral indicates generally a portable electric motor having a hand grip 11, a face plate 12 and a motor shaft 14. Secured to the face plate 12 of the motor 10 is a sheet metal frame 16 which includes spaced forwardly projecting brackets 17 between which are carried anti-friction bearings 19, 20 and 21.
  • the bearings 19 journal a vertical shaft 23 having secured to its upper end a worm gear wheel 24 which meshes with a worm 25 secured to the free end of the motor shaft 14.
  • the lower end of the shaft 23 is fitted with a mitre gear 26.
  • the bearings 20 journal a vertical shaft 27 to which is secured at its outer end a troweling member 28, and the bearings 21 journal a horizontal shaft 29 which supports at its outer end a second troweling member 30.
  • the shafts 27 and 29 are hollow and are fitted at their inner ends with mitre gears 31 and 32 respectively, which gears mesh with each other and the gear 32 meshes with the mitre gear 26.
  • the troweling members each consists of a central disk 33 upon which are mounted preferably by riveting a plurality of spring blades 34 having trailing edges 35 which are adapted to bear upon the face of the plaster to be finished.
  • the trailing edges have their outer ends leading their inner edges so as to wipe any plaster or Water engaged thereby towards the axis of the troweling member. All of the blades are contacted on their outer faces with one or more set screws 37 which serve to adjust the frictional bearing of each blade on a plastered surface.
  • the outer end of each blade 34 is rearwardly turned away from the working surface to form a rim portion 39 which serves to prevent the outer edges of said blades from cutting into the face of an adjacent wall.
  • troweling members 28 and 30 are of the same diameter and that the length of the blades of each will extend radially to the plane of the blades of the other, so that an internal angle of two adjoining walls having been plastered can have a width equal to the diameter of each troweling member and extending on both sides of the intersection of said walls troweled simultaneously as the tool is moved lengthwise of the intersecting line.
  • a valve 40 is fitted in any convenient position on the frame 16 and a water supply hose 41 is carried to said valve, two small hoses 43 extend from said valve through each of the shafts 27 and 29 and connect with nozzles 45 in the centre of each disk 33, one only shown.
  • a handle 47 is mounted on any convenient part of the frame 16', so that the device may be conveniently lifted and manipulated by both hands.
  • Power operated trowel comprising a prime mover having a pair of driven shafts disposed at right angles to each other, a rotatable troweling member on each shaft, said members each consisting of a disk having radial work surface contacting blades, said members being mounted with their work surfaces at an angle of substantially ninety degrees to each other to trowel adjoining wall areas forming an inside angle, the blades of one member being staggered with respect to those of the other member, each blade having an upturned rim portion at its outer end, the rim portions of the blades of one member being adapted to alternate with the blades of the other member to trowel the intersecting angle of the two adjoining wall areas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Description

. y 1958 J. D. DRUMMOND 2,836,056
POWER OPERATED PLASTERING TROWELS Filed Oct. 24, 1955 INVENTOR JOHN O. OH UMMOND ATTORNEY United States Patent Patented May 27, 1958 POWER OPERATED PLASTERING TROWELS John D. Drummond, North Burnaby, British Columbia, Canada Application October 24, 1955, Serial No, 542,421
1 Claim. (Cl. 72-=-136) My invention relates to improvements in power operated plastering trowels.
The objects of the present invention are to provide a power operated trowel having two troweling members capable of troweling inside angle planes of walls and ceilings simultaneously and to prevent any plaster displaced by one member from being moved onto the plane being troweled by the other member.
A further object is to provide means whereby the troweling members are shielded to prevent their peripheral edges from cutting into the plaster in the plane adjacent which it is working.
Referring to the accompanying drawings:
Figure 1 is a side elevational view of the invention as seen when not in use.
Figure 2 is an elevational view showing the face of one of the troweling members.
Figure 3 is a detail perspective view showing the manner in which the blades of a troweling member are adjusted.
In the drawings like characters of reference indicate corresponding parts in each figure.
The numeral indicates generally a portable electric motor having a hand grip 11, a face plate 12 and a motor shaft 14. Secured to the face plate 12 of the motor 10 is a sheet metal frame 16 which includes spaced forwardly projecting brackets 17 between which are carried anti-friction bearings 19, 20 and 21. The bearings 19 journal a vertical shaft 23 having secured to its upper end a worm gear wheel 24 which meshes with a worm 25 secured to the free end of the motor shaft 14. The lower end of the shaft 23 is fitted with a mitre gear 26. The bearings 20 journal a vertical shaft 27 to which is secured at its outer end a troweling member 28, and the bearings 21 journal a horizontal shaft 29 which supports at its outer end a second troweling member 30. The shafts 27 and 29 are hollow and are fitted at their inner ends with mitre gears 31 and 32 respectively, which gears mesh with each other and the gear 32 meshes with the mitre gear 26.
The troweling members each consists of a central disk 33 upon which are mounted preferably by riveting a plurality of spring blades 34 having trailing edges 35 which are adapted to bear upon the face of the plaster to be finished. The trailing edges have their outer ends leading their inner edges so as to wipe any plaster or Water engaged thereby towards the axis of the troweling member. All of the blades are contacted on their outer faces with one or more set screws 37 which serve to adjust the frictional bearing of each blade on a plastered surface. The outer end of each blade 34 is rearwardly turned away from the working surface to form a rim portion 39 which serves to prevent the outer edges of said blades from cutting into the face of an adjacent wall.
It will be obvious that the troweling members 28 and 30 are of the same diameter and that the length of the blades of each will extend radially to the plane of the blades of the other, so that an internal angle of two adjoining walls having been plastered can have a width equal to the diameter of each troweling member and extending on both sides of the intersection of said walls troweled simultaneously as the tool is moved lengthwise of the intersecting line.
A valve 40 is fitted in any convenient position on the frame 16 and a water supply hose 41 is carried to said valve, two small hoses 43 extend from said valve through each of the shafts 27 and 29 and connect with nozzles 45 in the centre of each disk 33, one only shown. A handle 47 is mounted on any convenient part of the frame 16', so that the device may be conveniently lifted and manipulated by both hands.
Obviously when the machine is at rest it will stand, as shown in Figure l, with the troweling member resting upon a horizontal surface. When in use it will be raised and manipulated to present each of the troweling members 28 and 30 to a plastered area consisting of two intersecting walls or the intersection of a wall and ceiling. The device will be reciprocatcd lengthwise of the corner, troweling both areas to the width of each of the troweling members. Water as desired is forced onto the plaster face through the nozzles 45 and is worked into the surface as it is hardened and smoothed. The upturned rim portion 39 and the immediate blade area from which they spring trowel the corner to a smooth square angle and prevent scoring of any wall which so frequently occurs in the troweling of a plastered inside angle or corner. Since the tips of the blades 34 of the two troweling members are staggered, one rim portion 39 is almost constantly in operative engagement with a wall surface, thus insuring that the device shall constantly move in a perfectly straight line as it is moved along the corner to be troweled.
What I claim as my invention is:
Power operated trowel comprising a prime mover having a pair of driven shafts disposed at right angles to each other, a rotatable troweling member on each shaft, said members each consisting of a disk having radial work surface contacting blades, said members being mounted with their work surfaces at an angle of substantially ninety degrees to each other to trowel adjoining wall areas forming an inside angle, the blades of one member being staggered with respect to those of the other member, each blade having an upturned rim portion at its outer end, the rim portions of the blades of one member being adapted to alternate with the blades of the other member to trowel the intersecting angle of the two adjoining wall areas.
References Cited in the file of this patent UNITED STATES PATENTS 1,118,576 Perkins Nov. 24, 1914 1,523,049 Campbell Ian. 13, 1925 1,645,317 Carroll Oct. 11, 1927 1,698,970 Shaft Jan. 15, 1929 1,828,576 Palatini Oct. 20, 1931 2,101,895 Boulton Dec. 14, 1937 2,553,688 Thompson May 22, 1951 2,556,983 Root June 12, 1951
US542421A 1955-10-24 1955-10-24 Power operated plastering trowels Expired - Lifetime US2836056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US542421A US2836056A (en) 1955-10-24 1955-10-24 Power operated plastering trowels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US542421A US2836056A (en) 1955-10-24 1955-10-24 Power operated plastering trowels

Publications (1)

Publication Number Publication Date
US2836056A true US2836056A (en) 1958-05-27

Family

ID=24163767

Family Applications (1)

Application Number Title Priority Date Filing Date
US542421A Expired - Lifetime US2836056A (en) 1955-10-24 1955-10-24 Power operated plastering trowels

Country Status (1)

Country Link
US (1) US2836056A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628210A (en) * 1969-09-19 1971-12-21 Edwin Padgett Electric plaster-finishing trowel
DE10347522A1 (en) * 2003-10-13 2005-05-12 Andreas Michael Power-driven plastering machine for preparing smooth surface on wall has electric motor driving plaster application plate with rotary, reciprocating or orbiting motion
US20050254896A1 (en) * 2004-05-17 2005-11-17 Ewer Charles J Rotating concrete finishing trowel
US20050254897A1 (en) * 2004-05-17 2005-11-17 Ewer Charles J Rotating concrete finishing trowel
US7104725B1 (en) * 2004-04-22 2006-09-12 Kelly Kipp Concrete finishing attachment
US20060204336A1 (en) * 2005-03-10 2006-09-14 Masterson Randy J Power trowelling aggregate decorative stone
US20060222459A1 (en) * 2005-03-29 2006-10-05 Mikhaylenko Vadim V Floor mud forming device and methodology
US20220056712A1 (en) * 2020-08-19 2022-02-24 John M. Ashton Concrete finishing assembly

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1118576A (en) * 1914-04-17 1914-11-24 Frederick L Perkins Varnish-rubber.
US1523049A (en) * 1924-01-03 1925-01-13 John A Campbell Surfacing machine
US1645317A (en) * 1924-12-22 1927-10-11 Carroll Joseph Cleaning machine
US1698970A (en) * 1924-10-01 1929-01-15 Wm H Keller Inc Portable tool
US1828576A (en) * 1929-05-20 1931-10-20 Palatini Thomas Troweling machine
US2101895A (en) * 1936-12-28 1937-12-14 Harold S Boulton Machine for troweling
US2553688A (en) * 1947-06-13 1951-05-22 Howard O Thompson Tool attachment
US2556983A (en) * 1949-05-05 1951-06-12 Walter J Root Cement finishing float blade

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1118576A (en) * 1914-04-17 1914-11-24 Frederick L Perkins Varnish-rubber.
US1523049A (en) * 1924-01-03 1925-01-13 John A Campbell Surfacing machine
US1698970A (en) * 1924-10-01 1929-01-15 Wm H Keller Inc Portable tool
US1645317A (en) * 1924-12-22 1927-10-11 Carroll Joseph Cleaning machine
US1828576A (en) * 1929-05-20 1931-10-20 Palatini Thomas Troweling machine
US2101895A (en) * 1936-12-28 1937-12-14 Harold S Boulton Machine for troweling
US2553688A (en) * 1947-06-13 1951-05-22 Howard O Thompson Tool attachment
US2556983A (en) * 1949-05-05 1951-06-12 Walter J Root Cement finishing float blade

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628210A (en) * 1969-09-19 1971-12-21 Edwin Padgett Electric plaster-finishing trowel
DE10347522A1 (en) * 2003-10-13 2005-05-12 Andreas Michael Power-driven plastering machine for preparing smooth surface on wall has electric motor driving plaster application plate with rotary, reciprocating or orbiting motion
US7104725B1 (en) * 2004-04-22 2006-09-12 Kelly Kipp Concrete finishing attachment
US20050254896A1 (en) * 2004-05-17 2005-11-17 Ewer Charles J Rotating concrete finishing trowel
US20050254897A1 (en) * 2004-05-17 2005-11-17 Ewer Charles J Rotating concrete finishing trowel
US7018132B2 (en) 2004-05-17 2006-03-28 Ewer Charles J Rotating concrete finishing trowel
US7108451B2 (en) 2004-05-17 2006-09-19 Ewer Charles J Rotating concrete finishing trowel
US20060204336A1 (en) * 2005-03-10 2006-09-14 Masterson Randy J Power trowelling aggregate decorative stone
US20060222459A1 (en) * 2005-03-29 2006-10-05 Mikhaylenko Vadim V Floor mud forming device and methodology
US7296948B2 (en) * 2005-03-29 2007-11-20 Vadim Mikhaylenko Floor mud forming device and methodology
US20220056712A1 (en) * 2020-08-19 2022-02-24 John M. Ashton Concrete finishing assembly
US11739543B2 (en) * 2020-08-19 2023-08-29 John M. Ashton Concrete finishing assembly

Similar Documents

Publication Publication Date Title
US2836056A (en) Power operated plastering trowels
US2616285A (en) Wall corner forming tool
US7144194B2 (en) Surface finisher
US2342445A (en) Cement finishing machine
US2817931A (en) Dry wall angle sander
US3111969A (en) Portable undercutting saw
CN111921770A (en) Full-automatic digital control furniture production line
US2860506A (en) Power driven plastering trowels
US2836840A (en) Paint roller means
CN215788719U (en) Panel cutting deburring device
US1851497A (en) Brick mason's pointing tool
US3514854A (en) Scarifier for use in removing wallpaper or the like
US3591884A (en) Machine for pointing ceramic tiles or the like slabs
CN209742326U (en) Ceramic tile device of caulking for building decoration
CA2289146C (en) Radius surface trowel
US4381911A (en) Portable hand controlled cement finishing machine
US6253454B1 (en) Drywall tool
US3389466A (en) Wall surface scarifying and preparing tool
US1654449A (en) Trowel
US2222877A (en) Bullnose forming tool
US1327151A (en) Jointer-tool
US3269283A (en) Surface finishing tool
US3628210A (en) Electric plaster-finishing trowel
CN216428932U (en) Combined plastering device
US2581179A (en) Pattern scribing tool