US3797848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding stroller
Assignee: THAYER Inc
•
Filing: 1972-10-10
•
Granted: 1974-03-19
•
Expires: 1992-10-10
Abstract
Abstract A light-weight folding stroller having for its principal characteristic that it is easily folded and erected by a one hand or a one arm operation. A pusher handle is pivoted with respect to a folding wheeled support having a seat, the support comprising a pair of interpivoted frames, in combination with a past dead center connection. When the pusher handle is moved to erect condition of the stroller, the connection has a part which overlaps the end of the pusher handle, receiving a gravity actuated loose ring latch which holds the entire structure erect. The rings are easily placed in an inoperative position when hung on pins extending from the sides of the pusher handle, whereupon a single push motion on the pusher handle folds the entire device. Likewise, a single pull on the pusher handle in the opposite direction erects the stroller and the ring latches are automatically actuated by gravity.
Inventors
- 👤 B Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:05
CPC Classifications
B; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/062; B62B7/08; B62B2205/00; B62B2205/20; B62B7/004; B62B7/064
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
162 words
A stroller comprising a front frame, a rear frame, a pusher handle frame and a seat frame, all of said frames including side members, the front and rear frames and the handle frame being pivoted together at their respective end portions, wheels journaled to the lower end portions of said front and rear frames, the seat frame being pivoted intermediate the ends of its side members to the front frame below said respective end portions and having a portion thereof extending toward the rear frame, links pivoted intermediate the ends of the rear frame and also being pivoted with relation to the rearwardly extending portion of the seat frame, and a second link pivoted at one end to the pusher handle frame above said respective end portions and at the other end to the seat frame at the rearwardly extending portion thereof, the second link comprising a past dead center connection when the stroller is erect and holding the frames against folding.
Claim 2
Dependent Claim
162 words
A stroller comprising a front frame, a rear frame, a pusher handle frame and a seat frame, all of said frames including side members, the front and rear frames and the handle frame being pivoted together at their respective end portions, wheels journaled to the lower end portions of said front and rear frames, the seat frame being pivoted intermediate the ends of its side members to the front frame below said respective end portions and having a portion thereof extending toward the rear frame, links pivoted intermediate the ends of the rear frame and also being pivoted with relation to the rearwardly extending portion of the seat frame, and a second link pivoted at one end to the pusher handle frame above said respective end portions and at the other end to the seat frame at the rearwardly extending portion thereof, the second link comprising a past dead center connection when the stroller is erect and holding the frames against folding.
Claim 3
Dependent Claim
32 words
The stroller of claim 1 wherein the pusher handle frame is adapted to break the past dead center connection to fold the frames upon a swinging motion forwardly toward the front frame.
Claim 4
Dependent Claim
21 words
The stroller of claim 2 including releasable latching means preventing relative motion of the second link and the pusher handle frame.
Claim 5
Dependent Claim
26 words
The stroller of claim 3 wherein the releasable latching means comprises a continuous member slidable on the pusher handle frame and engageable over the second link.
Claim 6
Dependent Claim
14 words
The stroller of claim 3 wherein the releasable latching means comprises a movable ring.
Claim 7
Dependent Claim
21 words
The stroller of claim 5 wherein the ring is slidable on one of the side elements of the pusher handle frame.
Claim 8
Dependent Claim
23 words
The stroller of claim 6 wherein said ring is held by gravity in position latching the pusher handle frame and the second link.
Claim 9
Dependent Claim
33 words
The stroller of claim 3 wherein said releasable latching means comprises a gravity-operated ring and including means for supporting the ring in non-latching condition releasing the pusher handle frame for folding the stroller.
Claim 10
Dependent Claim
22 words
The stroller of claim 8 wherein said ring supporting means comprises a pin extending laterally from a pusher handle frame side member.
Claim 11
Dependent Claim
23 words
The stroller of claim 9 wherein the pusher handle side member has a reduced portion, the pin being located in the reduced portion.
Claim 12
Dependent Claim
19 words
The stroller of claim 9 wherein said pin forms the pivot for the second link and the pusher handle.
Claim 13
Dependent Claim
59 words
The stroller of claim 10 wherein the pin terminates in a free end short of the corresponding dimension of the respective unreduced portion of the pusher handle frame side element so that the ring when above the pin will fall by gravity past the pin automatically into latching position of the pusher handle side member and the second link.
Claim 14
Dependent Claim
20 words
The stroller of claim 11 wherein the pusher handle side member is hollow tubing and the reduced portion is flat.
Claim 15
Dependent Claim
42 words
The stroller of claim 1 including transverse members at the lower end portions of the front and rear frames connecting the respective side members, and axles for the wheels located above the said respective transverse members on the front and rear frames.
Claim 16
Dependent Claim
87 words
The stroller of claim 14 wherein said axles each comprises a rod having a flattened portion secured to the inside aspect of the respective side members of the front and the rear frames and extending down along the same to a point above the transverse members of the front and rear frames, and terminating in a right angle bend extending through a side member of each of the front and rear frames, protruding to the outside aspects thereof, the wheels being mounted on the protruding portions thereof.
Claim 17
Dependent Claim
46 words
The stroller of claim 1 wherein the front frame is provided with a cross member at the lower portion thereof, said cross member being at the ends of the side members of the front frame, and casters depending from said cross member adjacent the side members.
Claim 18
Dependent Claim
47 words
The stroller of claim 1 including a carrying strap extending between the side members of the rear frame, and means securing the strap to the side members thereof, said carrying handle being located just above the position of the seat frame in folded condition of the stroller.
Claim 19
Dependent Claim
167 words
A folding stroller comprising a front frame including spaced elongated side members, a rear frame comprising spaced elongated side members, means pivoting said frames adjacent corresponding ends thereof, wheels journaled to the other ends of said front and rear frames, a seat frame including side members pivoted between the side members of the front frame below said corresponding ends intermediate the lengths of the side members of the seat frame, a rear cross rod on said seat frame, a link pivoted to said rod and to an intermediate portion of a side member of the rear frame, a pusher handle frame, means mounting the latter to pivot with respect to the front and rear frames, and a second link pivoted to the pusher frame at a spaced position from the pivot axis of the pusher frame, said second link being pivoted at its opposite end to the rear cross rod on the seat frame, and releasable means latching said second link and the pusher frame against folding.
Claim 20
Dependent Claim
167 words
A folding stroller comprising a front frame including spaced elongated side members, a rear frame comprising spaced elongated side members, means pivoting said frames adjacent corresponding ends thereof, wheels journaled to the other ends of said front and rear frames, a seat frame including side members pivoted between the side members of the front frame below said corresponding ends intermediate the lengths of the side members of the seat frame, a rear cross rod on said seat frame, a link pivoted to said rod and to an intermediate portion of a side member of the rear frame, a pusher handle frame, means mounting the latter to pivot with respect to the front and rear frames, and a second link pivoted to the pusher frame at a spaced position from the pivot axis of the pusher frame, said second link being pivoted at its opposite end to the rear cross rod on the seat frame, and releasable means latching said second link and the pusher frame against folding.
Claim 21
Dependent Claim
46 words
The stroller of claim 18 wherein the means pivotally mounting the pusher handle frame and the two pivots of the second link comprise a past dead center locking device, the latching means preventing breaking of the past dead center device until the latching means is released.
Claim 22
Dependent Claim
15 words
The stroller of claim 19 wherein the releasable latching means comprises a gravity actuated ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |