US3687475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Merchandise carts
Assignee: Wico Corp
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Filing: 1970-09-01
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Granted: 1972-08-29
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Expires: 1990-09-01
Abstract
Abstract A hand-propelled cart with side wheels and a rear caster leg foldable under the frame of the cart. The wheels are normally locked in standing position; and a crank handle at the rear is operable in the manner of a winch to first unlock the wheels and then raise them to the folded position, where they become automatically locked. The caster leg is also normally locked in the standing position; and a handle at the rear is operable to unlock the caster leg and fold it as stated. A depressible plunger for the wheels and one for the caster leg are provided at the rear, and function to unlock these parts, in which event they drop to standing position by gravity and become automatically locked therein.
Inventors
- 👤 Max Wiczer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:46
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/002; B62B5/00; B62B5/0003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
The combination with a cart frame, side wheels for the same, a support for the side wheels pivoted to the frame for folding the same in upward direction, a guide carried by the frame, and a rigid hanger pivotally connected at one end thereof to said support with the other end thereof slidably engaged in said guide; of a stop element in the latter for arresting said the other end for maintaining said support in an unfolded downposition, a hand control including a cable connected to said support, and a detent carrying said stop element and operatively connected to said cable, the operation of said hand control to tension said cable depressing said detent and retracting said stop element to release said the other end causing said support to pivot into a folded up-position.
Claim 2
Dependent Claim
134 words
The combination with a cart frame, side wheels for the same, a support for the side wheels pivoted to the frame for folding the same in upward direction, a guide carried by the frame, and a rigid hanger pivotally connected at one end thereof to said support with the other end thereof slidably engaged in said guide; of a stop element in the latter for arresting said the other end for maintaining said support in an unfolded downposition, a hand control including a cable connected to said support, and a detent carrying said stop element and operatively connected to said cable, the operation of said hand control to tension said cable depressing said detent and retracting said stop element to release said the other end causing said support to pivot into a folded up-position.
Claim 3
Dependent Claim
27 words
The structure of claim 1, the detent presenting a roller at the top, and said cable trained over the roller to descend and connect with the support.
Claim 4
Dependent Claim
32 words
The structure of claim 1, the detent pivoted to the guide and presenting a roller at the top, and said cable trained over the roller to descend and connecT with the support.
Claim 5
Dependent Claim
51 words
The structure of claim 1, the hand control being a ratchet-winch, a pulley from which the cable is extended, the pulley driven by the winch, and a second control operable to disconnect the pulley from the winch for free rotation, the detent yieldable to trip the stop element on the return.
Claim 6
Dependent Claim
59 words
The structure of claim 1, said hand control being a ratchet-winch, a pulley from which the cable is extended, the pulley driven by the winch, a key locking the pulley to the same, and a knob depressible to withdraw the key and disconnect the pulley for free rotation, the detent yieldable to trip the stop element on the return.
Claim 7
Dependent Claim
71 words
The structure of claim 1, said hand control being a ratchet-winch, a pulley from which the cable is extended, the pulley driven by the winch, a hub extended from the pulley and having an end-slot, and a non-rotatable plunger in the hub with a side pin seating in the end-slot, the plunger depressible to move the pin out of the end-slot and free the pulley for rotation free of the winch.
Claim 8
Dependent Claim
112 words
The structure of claim 1, said hand control being a ratchet-winch, a pulley from which the cable is extended, the pulley driven by the winch, a hub extended from the pulley and having diametrically spaced end-slots, a stationary tube extending from the winch through the hub and having diametrically-spaced spaced wall slots with which said end-slots are adapted to register, a plunger in the tube with a cross-pin extending through said end-slots in such event, the plunger slidable to move the cross-pin out of the end slots and release the pulley for rotation free of the winch, and a compression spring supported in the tube to resist the sliding of the plunger.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |