Single Rear Prop, Pole Type Patents (Class 182/169)
  • Patent number: 9260917
    Abstract: A telescopic loft ladder has two stiles with sections that are telescopically collapsible within each other, rungs having lateral ends each connected to respective sections the stiles, retractable pins in the ends of the rungs for engaging holes in the stile sections to retain them in an extended position, and levers on the rungs that automatically operate when two rungs contact one another to disengage pins of the upper of the contacting rungs from the holes to permit collapse of the next higher rung. Each uppermost stile section is rotatable relative to the section connected to the uppermost rung of the ladder and has circumferentially and axially offset pin receiving holes. At least one resilient element biases the next to uppermost rung away from the uppermost rung to ensure that the locking pin of the uppermost rung engages a hole in the uppermost stile section as the ladder is lowered.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: February 16, 2016
    Inventor: Richard Weston
  • Patent number: 8678329
    Abstract: A device for transporting a ladder has first and second frame positions, the lower ends of which are pivotally mounted on an axle that also mounts a wheel for rolling along the ground. The upper ends of the frame portions are moveable toward and away from each other allowing the device to collapse for storage. A hook is mounted on the upper end of each of the frame portions for attachment to adjacent rungs of the ladder. A strap connects the upper ends of the frame portion to prevent them from separating from each other beyond a given distance.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: March 25, 2014
    Inventors: Thomas G. Bryant, Sr., Angel M. Feliciano, Jr.
  • Publication number: 20080053752
    Abstract: A panel for use in a door having an access area that allows a window to slide into at least one channel formed in the sides of a window area within the panel.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 6, 2008
    Inventors: Peter Miller, Duer Miller
  • Patent number: 6378655
    Abstract: An accessory replacement front ladder leg assembly for use with the standard tripod stepladder consisting of an outer sleeve member having incremental penetrations disposed therein an inner sleeve member also having incremental penetrations that slides in and out of the outer sleeve member. The outer sleeve and inner sleeve members are locked together by a hitchpin when the incremental penetrations are aligned. The replacement leg is then adapted to the user's own tripod stepladder after removal of the tripod's front leg.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: April 30, 2002
    Inventor: Trey Scott Campbell
  • Patent number: 5590739
    Abstract: A motorized utility extension ladder having a main and upper riser section extendable by a motor. The ladder further comprising a telescopic prop so that the ladder may be free standing, side wing legs for stabilizing the ladder, wheels for transporting the ladder, and a removable shelf.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: January 7, 1997
    Inventors: DeWayne A. High, Timm J. Timmermann
  • Patent number: 4798262
    Abstract: This invention relates to tripodal support structures and more particularly to a three-legged folding step-ladder having outrigger-type support extensions on the two front support legs, a rear support member having a single ground contact point, and independently extendable and retractable safety hand rails. The support legs of the instant invention contact the ground at points spaced apart from one another to form an equilateral triangle when viewed from above.
    Type: Grant
    Filed: September 12, 1986
    Date of Patent: January 17, 1989
    Inventor: Paul Margolies
  • Patent number: 4796727
    Abstract: A folding step ladder is provided wherein a ladder having side leg portions with at least three steps extending between and fixedly connected to the side leg portions is supported by at least a pair of support legs pivotally mounted on the top end portion of the ladder for pivotal movement in a plane parallel to the plane extending between the side leg portions and at least one additional support leg pivotally mounted on the top end portion of the ladder for pivotal movement in a plane parallel to the planes of the side leg portions and wherein each of the pair of support legs and the additional leg are provided with slidable extension tubes so that the ladder may be supported to extend in a vertical direction on any supporting surface. Also, another ladder is connected to the folding step ladder for relative sliding movement therebetween so as to provide a folding extension step ladder.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: January 10, 1989
    Inventor: Earl V. Eaton
  • Patent number: 4618027
    Abstract: A ladder comprises a pair of main stiles, a series of centrally-hinged rungs with ends articulated to the two main stiles, whereby the ladder can adopt a folded inoperative configuration in which the main stiles are alongside each other and an extended operative configuration in which the main stiles are spaced from each other, and means for stopping the ladder in the extended operative configuration. The main stiles are articulated together at their upper ends and the ladder further includes a single auxiliary stile articulated at its upper end to the two upper ends of the main stiles about an axis substantially perpendicular to the articulation axis of the two main stiles. The auxiliary stile is movable between a position alongside the two main stiles, corresponding to the folded inoperative condition of the ladder, and a position spaced from the main stiles, corresponding to the extended operative condition of the ladder.
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: October 21, 1986
    Assignee: Castilia S.p.A.
    Inventor: Giancarlo Piretti
  • Patent number: 4600080
    Abstract: A tripod stepladder in which a bracing means includes a sleeve or collar that slides up and down the third or rear leg as the ladder is folded and unfolded. A pail shelf is pivotally attached to the third leg and locks the ladder in the open position, thereby preventing inadvertent closure of the ladder as long as the pail shelf is in the horizontal position.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: July 15, 1986
    Inventor: Charles R. Forrester
  • Patent number: 4130181
    Abstract: A support strut arrangement for use with a ladder extends from the ladder in load transfer relation with the ground, having lost motion provision to accept a predetermined extent of bowing of the ladder under the weight of a user before the load strut becomes effective, so that the top ends of the ladder may be in substantially unrestricted pressing relation against the supporting wall or other object, thereby permitting the development of substantially maximum friction forces tending in normal use to maintain the tip of the ladder in its propped position. In the event that the foot of the ladder slips out the lost motion, in the form of an extensible tension member or of a strut which can shorten its effective length, is taken up and substantially rigid triangulation of forces is established.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: December 19, 1978
    Inventor: William J. P. McCallum
  • Patent number: 3991852
    Abstract: Aid devices to facilitate the transport and raising of heavy ladders. To raise or lower the ladder, a lifter is provided in the form of a long pole having a transverse piece attached to one end thereof, the length of the piece being almost equal to the distance between the sidepieces of the ladder. Secured to the ends of the piece are resilient clips adapted to engage and clamp onto any rung of the ladder to be raised. In order to transport the ladder to a work site, a caddy is provided in the form of a pair of transverse pieces having clips installed thereon, the pieces being attached at spaced positions to the bridge of a two-wheeled carriage so that the pieces are adapted to straddle and engage a pair of adjacent rungs on the ladder in wheel-barrow position.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: November 16, 1976
    Inventors: Malcolm J. Brookes, James Sheridan, Douglas M. Spranger