# US 10,869,794 B2 · Reversible seating mechanism with tilt limiting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,869,794 B2 - Document ID: US10869794B2 - Status: Granted - Kind: B2 - Application number: 16/310,493 - Filed: 2017-06-19 - Published: 2019-08-29 - Granted: 2020-12-22 - Earliest claimed: 2016-06-17 - Assignees: Sunrise Medical (US) LLC - Applicants: Sunrise Medical (US), LLC - Inventors: Steven L. Lindquist; Vasily G. Tsuber - Web page: https://patentgrep.com/patent/US10869794B2 ## CPC - A61G 5/107: {positioning the whole seat forward or rearward} - A61G 5/1072: {rotating the whole seat around a vertical axis} - A61G 5/1075: {tilting the whole seat backwards (tilting forwards for standing-up or sitting-down aids A61G5/14)} - A61G 5/14: Standing-up or sitting-down aids - B60N 2/02: the seat or part thereof being movable, e.g. adjustable (adjustable arm-rests B60N2/75; adjustable head-rests B60N2/806) - B62B 7/142: {Means for securing the body to the frame} - B62B 9/102: {characterized by details of the seat} - B62B 9/104: {with adjustable or reclining backrests} - B62B 9/12: involving parts that are adjustable, attachable or detachable {(B62B9/102, B62B9/14 take precedence)} - B60N 2/10: tiltable (B60N2/12 {, B60N2/2875} take precedence) - B62B 2203/071: turning around a vertical pivot axis - A61G: TRANSPORT, PERSONAL CONVEYANCES OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS (appliances for aiding patients or disabled persons to walk A61H3/00); OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES (embalming corpses A01N1/00) - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) ## Abstract A reversible seating mechanism includes a frame and a cross member pivotally supported on the frame for rotational movement in a plane generally parallel to the frame to define a tilt angle. A mounting plate is pivotally supported on the cross member for rotational movement in a plane generally parallel to the cross member to define one of a forward and rearward facing orientation. The mounting plate is moveable on the cross member to be oriented to the tilt angle. A tilt limiter restricts movement of the mounting plate between the forward and rearward facing orientations until the tilt angle is adjusted to a preset angle. The tilt limiter limits a forward facing tilt angle to an angle less than a rearward tilt angle. ## Claims ### Claim 1 A reversible seating mechanism for stroller or wheelchair, comprising: a frame; a cross member pivotally supported on the frame for rotational movement in a plane generally parallel to the top of frame to define a tilt angle; a mounting plate for supporting a seat, pivotally supported on the cross member for rotational movement in a plane generally parallel to the top of cross member to define one of a forward and rearward facing orientation, the mounting plate being oriented to the tilt angle; and a tilt limiter having a rocker actuator that engages a plunger pin connected to the mounting plate, the rocker actuator inhibiting rotation of the mounting plate from one of the forward and rearward facing orientations to the other when the tilt limiter is in a first position and permitting rotation of the mounting plate to the other of the forward and rearward facing orientation when the tilt limiter is moved to a second position such that movement of the mounting plate is restricted between the forward and rearward facing orientations until the tilt angle is adjusted to a preset angle. ### Claim 2 (depends on 1) The reversible seating mechanism of claim 1 wherein the preset angle is a generally level or near level orientation relative to ground. ### Claim 3 (depends on 1) The reversible seating system of claim 1 wherein the first position of the tilt limiter limits a forward tilt angle to an angle less than a rearward tilt angle. ### Claim 4 (depends on 3) The reversible seating system of claim 3 wherein the first position of the tilt limiter inhibits rotation of the mounting plate to the rearward facing orientation. ### Claim 5 (depends on 4) The reversible seating system of claim 4 wherein the second position of the tilt limiter permits movement of the mounting plate to the rearward facing orientation and limits the forward facing tilt angle to an angle less than the rearward tilt angle. ### Claim 6 (depends on 3) The reversible seating system of claim 3 wherein the forward tilt angle is in a range of about 0 degrees to about 5 degrees and the rearward tilt angle is in a range of about 0 degrees to about 30 degrees. ### Claim 7 (depends on 1) The reversible seating system of claim 1 wherein the rocker actuator defines two intersecting surfaces. ### Claim 8 (depends on 7) The reversible seating system of claim 7 wherein the two intersecting surfaces are generally planar intersecting surfaces that contact the plunger pin such that one surface permits movement of the plunger pin toward the intersection and the other surface inhibits movement of the mounting plate to the other of the forward and rearward facing orientation when the tilt limiter is in the first position. ### Claim 9 (depends on 8) The reversible seating system of claim 8 wherein when the plunger pin contacts the intersection and the tilt limiter is then moved to the second position, the mounting plate is permitted to move to the other of the forward and rearward facing orientation. ### Claim 10 (depends on 1) The reversible seating system of claim 1 wherein the mounting plate includes a rotation release lever that prevents rotation of the mounting plate parallel to the cross member in a locked position and permits rotation of the mounting plate parallel to the cross member in the unlocked position. ### Claim 11 (depends on 1) The reversible seating system of claim 1 wherein the cross member includes a first cross member pivot support and a mechanical lock assembly that biases cross member to move the mounting plate into the preset angle. ### Claim 12 (depends on 11) The reversible seating system of claim 11 wherein the tilt limiter has a first position that inhibits rotation of the mounting plate from one of the forward and rearward facing orientations to the other and a second position that permits further rotation of the mounting plate to the other of the forward and rearward facing orientation. ### Claim 13 (depends on 1) The reversible seating system of claim 1 wherein the tilt limiter has a first position that inhibits rotation of the mounting plate from one of the forward and rearward facing orientations to the other and a second position that permits further rotation of the mounting plate to the other of the forward and rearward facing orientation. ### Claim 14 (depends on 13) The reversible seating system of claim 13 wherein the first position of the tilt limiter inhibits rotation of the mounting plate to the rearward facing orientation and limits a forward facing tilt angle to an angle less than a rearward tilt angle and wherein the second position of the tilt limiter permits movement of the mounting plate to the rearward facing orientation and limits the forward facing tilt angle to an angle less than the rearward tilt angle.